JP2011252146A - High-refractive-index elastomer and resin composition containing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polymer which can impart impact resistance to a high-refractive-index transparent resin while keeping high transparency of the high-refractive-index transparent resin and which has a function of a modifier.SOLUTION: The high-refractive index elastomer A being the polymer is obtained by polymerizing a monomer based on an ester AM of aromatic thioalkyl alcohol with (meth)acrylic acid, is insoluble in solvents such as methyl ethyl ketone, and has -10°C glass transition temperature and ≥1.575 refractive index nAC. The high-refractive-index elastomer A includes the polymer AC and has ≥1.570 refractive index nA.

Description

  The present invention relates to a high refractive index elastomer, a resin composition containing the elastomer, and a molded body thereof.

  Conventionally, resins such as polycarbonate resin, amorphous polyamide resin, amorphous polyester resin, methacrylic resin, styrene resin, vinyl chloride resin, and epoxy resin have excellent transparency and are used in various applications. Elastomer components such as diene elastomers, acrylic elastomers, silicone elastomers, olefin elastomers, or modified products thereof are so-called because they are easily destroyed when a strong impact is applied to a molded body made only of these resins. As an impact resistance improver, a method of obtaining a molded article having excellent impact resistance by making it exist in a finely dispersed state in these resins is known. It is known that as the glass transition temperature (Tg) of the elastomer component contained in these impact resistance improvers is lower, a tendency to be superior in the impact resistance improvement effect is often observed.

  On the other hand, when applying the impact resistance improver to the transparent resin, in order to maintain transparency at the same time, it is necessary to make the refractive indexes of these resins and the impact resistance improver close to each other. However, in many materials used as such an elastomer component, those having a high refractive index tend to have a high Tg, that is, when an impact modifier based on an elastomer component having a high refractive index is used. However, there is a problem that the impact resistance improving effect cannot be sufficiently obtained. On the other hand, when impact resistance is emphasized and an impact resistance improver based on an elastomer component having a low Tg is selected, there is a problem that transparency must be sacrificed. In particular, when modifying a high refractive index resin typified by a polycarbonate resin, such a problem may be a serious problem, and there is substantially no applicable impact resistance improver. I can say that.

  Conventionally, a method using a styrene-butadiene copolymer is well known (Patent Documents 1 and 2), but this technique is no exception as described above.

  By forming a fine region of the high refractive index polymer component in the elastomer component, or by introducing a core made of the high refractive index polymer component into the elastomer component, the average refractive index value can be increased without increasing the Tg of the elastomer component. Attempts have been made to improve both transparency and impact resistance. (Patent Documents 3 and 4). However, it is still not sufficient, and when a large amount of the high refractive index polymer component is used, there is still a problem that it is difficult to develop impact resistance.

  As a monomer that gives a polymer having a high refractive index and a low Tg, a method using (thioaromatic) alkyl acrylate has been proposed (Patent Document 5). It is stated that when blended with a polycarbonate resin, it exhibits good transparency, low haze ratio (cloudiness) and yellowness while increasing impact resistance and environmental stress crack resistance. In the examples, the physical properties of a polycarbonate resin containing 5% of an impact modifier using 3- (thiophenyl) propyl acrylate are shown. The rate is 79.3%, the haze rate is 23.9%, and the yellowness index (YI) is 12.6. It is still difficult to say that it has a high degree of transparency, and there is room for improvement in the yellowness index, and further improvement has been desired.

JP-A-6-65331 Japanese Patent Laid-Open No. 4-335049 JP 2001-31852 A JP 7-48496 A JP-A-6-184235

  An object of this invention is to provide the polymer which has a function as a modifier which can provide impact resistance, maintaining the transparency of high refractive index transparent resin highly. Furthermore, it aims at providing the resin composition excellent in transparency, the coloring property at the time of coloring, impact resistance, and yellowness.

  As a result of intensive studies to solve the above problems, the present inventors have used (meth) acrylic acid ester of aromatic thioalkyl alcohol as a monomer to be used for polymerization in forming the elastomer component. It has been found that the above-mentioned problems can be achieved by controlling the refractive index of the component insoluble in methyl ethyl ketone to a specific condition, and the present invention has been completed. The high refractive index elastomer A of the present invention and the resin composition obtained by blending it are highly maintained in transparency, excellent in yellowness, excellent in impact resistance. Excellent.

That is, the present invention is as follows.
1) A high refractive index elastomer A containing a polymer portion AC,
The high refractive index elastomer A is
It is obtained from a monomer based on (meth) acrylic acid ester AM of aromatic thioalkyl alcohol,
Its refractive index nA is 1.570 or more, and
The polymer portion AC is obtained from a monomer having AM as a main component,
Its refractive index nAC is 1.575 or more,
Insoluble in methyl ethyl ketone,
Its glass transition temperature is −10 ° C. or lower,
High refractive index elastomer A.
2) The high refractive index elastomer A includes the polymer part AC and the polymer part AS,
The polymer part AS is
It is obtained from a monomer that does not contain AM as a main component,
The refractive index nAS is at least 0.005 lower than the refractive index nAC of the polymer portion AC, and includes a methyl ethyl ketone soluble component,
Its glass transition temperature is 11 ° C. or higher.
High refractive index elastomer A as described in 1) above.
3) 100% by weight of the high refractive index elastomer A is
A multi-stage polymer comprising 70 to 95% by weight of the polymer part AC and 5 to 30% by weight of the polymer part AS polymerized in the presence of the polymer part AC;
The polymer part AS is
It is obtained from a monomer that does not contain AM as a main component,
The refractive index nAS is lower than the refractive index nAC of the polymer portion AC,
Contains methyl ethyl ketone soluble components, and
Its glass transition temperature is 11 ° C. or higher.
High refractive index elastomer A as described in 1) above.
4) The high refractive index elastomer A according to 1) to 3) above, wherein the AM has only one radical polymerizable group.
5) The high refractive index elastomer A according to 4) above, wherein the AM is phenylthioethyl acrylate.
6) The high refractive index elastomer A according to 3) above, wherein the monomer polymerized at the final stage in the polymerization for forming the polymer part AS is mainly composed of methyl methacrylate.
7) The high refractive index elastomer A as described in 2) or 3) above, wherein the polymer part AS contains methyl methacrylate as a main component.
8) The high refractive index elastomer A according to any one of 1) to 7) above, wherein the low molecular peroxide content is 500 ppm or less.
9) A high refractive index elastomer-containing resin composition comprising 100 parts by weight of resin B and 1 to 15 parts by weight of the high refractive index elastomer A1,
The resin B is at least one selected from the group consisting of a thermoplastic resin, a thermosetting resin, and an elastomer resin, the resin B forms a continuous phase, and the high refractive index elastomer A as a dispersed phase therein. And the refractive index nB of the resin B is lower than the refractive index nAC, the resin composition containing the high refractive index elastomer A according to any one of 1) to 8) above.
10) The resin composition containing the high refractive index elastomer A as described in 9) above, wherein the difference between the nA and nB is 0.01 or less.
11) The resin composition containing the high refractive index elastomer A according to 9) or 10), wherein the nB is 1.57 or more.
12) The high refractive index elastomer-containing resin composition according to any one of 9) to 11) above, wherein the high refractive index elastomer A is uniformly dispersed in the resin B. A resin composition to contain.
13) The high refractive index elastomer-containing resin composition as described in 9) to 12) above, wherein the high refractive index elastomer A is dispersed in the resin B with a number average dispersed particle size of 0.07 to 5 μm. The resin composition containing the high refractive index elastomer A.
14) The resin composition containing a high refractive index elastomer A according to 12) above, wherein the high refractive index elastomer A is molecularly compatible with the resin B.
15) A molded product of a resin composition containing the high refractive index elastomer A according to any one of 9) to 14) above, wherein the molded product has a haze ratio of 10% or less according to ASTM D1003.

The present invention is also a group of inventions shown below.
(1) A high refractive index elastomer A which is a polymer of a monomer mainly composed of (meth) acrylic acid ester AM of an aromatic thioalkyl alcohol, and has a refractive index nA of 1.570 or more. And a monomer polymer having AM as a main component, insoluble in a solvent (mainly methyl ethyl ketone), a glass transition temperature of −10 ° C. or lower, and a refractive index nAC of 1 A high refractive index elastomer comprising a polymer AC that is greater than or equal to 575.
(2) 100% by weight of the high refractive index elastomer A, which is a multistage polymer containing 5 to 30% by weight of the polymer AS polymerized in the presence of 70 to 95% by weight of the polymer AC, and the polymer AS The high refractive index elastomer according to (1), having a glass transition temperature of 11 ° C. or higher, containing a solvent (mainly methyl ethyl ketone) soluble component, and having a refractive index nAS lower than the nAC.
(3) The high refractive index elastomer according to (1) or (2), wherein the AM has only one radical polymerizable group.
(4) The high refractive index elastomer according to (3), wherein the AM is phenylthioethyl acrylate.
(5) The high refractive index elastomer according to any one of (1) to (4), wherein the low molecular peroxide content is 500 ppm or less.
(6) A high refractive index elastomer-containing resin composition comprising 100 parts by weight of resin B and 1 to 15 parts by weight of the high refractive index elastomer A1,
The resin B is one or more selected from the group consisting of a thermoplastic resin, a thermosetting resin, and an elastomer resin, and the resin B includes the high refractive index elastomer A to form a continuous phase, and The high refractive index elastomer-containing resin composition according to any one of (1) to (5), wherein the refractive index nB of the resin B is lower than the refractive index nAC.
(7) The high refractive index elastomer-containing resin composition according to (6), wherein a difference between the nA and nB is 0.01 or less.
(8) The high refractive index elastomer-containing resin composition according to (6) or (7), wherein the nB is 1.57 or more.
(9) The high refractive index elastomer-containing resin composition according to any one of (6) to (8) above, wherein the high refractive index elastomer A is uniformly dispersed in the resin B. Elastomer-containing resin composition.
(10) The high refractive index elastomer-containing resin composition according to (9), wherein the high refractive index elastomer A is dispersed in a resin B with a number average dispersed particle size of 0.07 to 5 μm. High refractive index elastomer-containing resin composition.
(11) A high-refractive-index elastomer-containing resin composition as described in (9) above, wherein the high-refractive-index elastomer A is molecularly compatible with the resin B.
(12) A molded article of the high refractive index elastomer-containing resin composition according to any one of (6) to (11) above, wherein the molded article has a haze ratio of 10% or less according to ASTM D1003.

  When the resin composition obtained by blending the high refractive index elastomer A of the present invention with a high refractive index transparent resin is highly maintained in transparency, excellent in yellowness, excellent in impact resistance, and colored. Is excellent in color development.

(High refractive index elastomer A)
The high refractive index elastomer A of the present invention is a material that contributes to the modification of the resin composition as an elastomer component, and is the weight of a monomer mainly composed of an aromatic thioalkyl alcohol (meth) acrylate ester AM. A polymer A having a unit derived from AM as a main component, having a high refractive index nA of 1.570 or more, preferably 1.576 or more, more preferably 1.581 or more, and rubber It is a polymer having elasticity. Here, the unit derived from AM is the main component means that the amount of each monomer component to be copolymerized (other than AM) does not exceed the amount of AM used. The proportion of the unit derived from AM in 100% by weight of the high refractive index elastomer A, basically, the proportion of the monomer AM in the total amount of monomers used for the polymerization of the polymer A is the elastomer A of the present invention. Is preferably 50% by weight or more, more preferably 71% by weight or more, still more preferably 76% by weight or more, and still more preferably 81% by weight or more, from the viewpoint of achieving a high refractive index and low elasticity. Moreover, it is preferable that it is 94 weight% or less, and it is more preferable that it is 89 weight% or less.

  Since the high refractive index elastomer A of the present invention is used as an elastomer component for modifying a resin composition, it is preferably from the viewpoint of improving dispersibility in the resin component (hereinafter sometimes referred to as matrix resin). , Which mainly contributes to a low elastic modulus and a high refractive index, and is polymerized in the presence of a monomer polymer portion AC mainly composed of AM, preferably in the presence thereof, and mainly has an effect of increasing dispersibility. It is preferable that it is a multistage polymer containing the polymer part AS which has. Here, the polymer of monomer having AM as a main component means that the amount of each monomer component (other than AM) to be copolymerized does not exceed the amount of AM used. The polymer portion AS is preferably obtained from a monomer that does not contain AM as a main component. Here, “a monomer not containing AM as a main component” means a monomer in which the most used monomer component is other than AM. The proportion of AM in the polymer part AS is less than 50% by weight, preferably 48% by weight or less, more preferably 33% by weight or less, and further preferably 19.5% by weight or less.

  From the viewpoint of making the elastomer A of the present invention have a high refractive index and a low elastic modulus, the ratio of the polymer AC in 100% by weight of the high refractive index elastomer A, basically, a single polymer used for the polymerization of the polymer A. The proportion of the monomer provided to the polymer AC in the total amount of the monomer is preferably 70 to 95% by weight, more preferably 76 to 89% by weight.

  From the viewpoint of sufficiently dispersing the elastomer A of the present invention in the matrix resin, the proportion of the polymer AS in 100% by weight of the high refractive index elastomer A, basically, in the total amount of monomers used for the polymerization of the polymer A The proportion of the monomer provided to the polymer AS is preferably 5 to 30% by weight, more preferably 11 to 24% by weight.

  From the viewpoint of forming a molded article having good physical properties by securing thermal stability during molding of a composition obtained by adding the elastomer A of the present invention to a matrix resin, particularly a molded article having excellent yellowness, a low molecular weight of the elastomer A The peroxide content is preferably 500 ppm or less, more preferably 195 ppm or less, further 45 ppm or less, and particularly preferably substantially 0 ppm. Here, substantially 0 ppm refers to a level that cannot be detected by a measuring instrument such as a gas chromatograph. The term “small molecule” as used herein means a molecule having a molecular weight of 500 or less.

  The ratio of the unit derived from AM in 100% by weight of AC, basically the ratio of monomer AM in the total amount of monomers used for polymerization of polymer AC is high refraction of elastomer A of the present invention. From the viewpoint of rate and low elasticity, it is necessary to be more than 50% by weight, preferably 71% by weight or more, more preferably 76% by weight or more, further 81% by weight or more, and 100% by weight. It is preferably 99.8% by weight or less, more preferably 99.4% by weight or less, further 94% by weight or less, more preferably 89% by weight or less.

  In addition, the AC has a glass transition temperature (Tg) of preferably −10 ° C. or lower, more preferably −15.1 ° C. or lower, and further −31 ° C. or lower, from the viewpoint of developing impact resistance. In addition, it is preferably insoluble in a solvent such as methyl ethyl ketone, and the refractive index nAC is preferably 1.575 or more. In the present invention, the polymer site AC is insoluble in methyl ethyl ketone, for example, by immersing 2 g of the polymer site AC and 100 g of methyl ethyl ketone at room temperature for 12 hours, and then precipitating the gel with an ultracentrifuge. This means that the gel content is 1.5 g or more.

  The high refractive index elastomer A of the present invention is selected so as to contain a (meth) acrylic acid ester AM of an aromatic thioalkyl alcohol and other monomers as required, preferably a small amount of a polyfunctional monomer. In the presence of the polymer AC obtained by polymerization, the polymer AS produced is selected to have a refractive index lower than that of the polymer AC, and other monomers as described above, and if necessary aromatic It can be obtained by polymerizing AS, which is a polymer of monomers composed of (meth) acrylic acid ester of thioalkyl alcohol.

  At this time, the refractive index of the polymer AC is higher than the refractive index of the resin B to be mixed with the high refractive index elastomer A (that is, the refractive index of the resin B is lower than the refractive index of the polymer AC). By adjusting these compositions so that the refractive index is lower than the refractive index of resin B (that is, the refractive index of resin B is higher than the refractive index of polymer AS), transparency can be achieved to a high degree, and at the same time, impact resistance is improved. In order to express with a good balance, it is preferable.

  In this specification, the glass transition temperature Tg may be measured using a differential scanning calorimeter (DSC), but the one described in the fourth edition published by John Wiley & Son, “Polymer Handbook”, 1999, is used instead. be able to. When it is a copolymer, pay attention to the monomer unit in which the weight fraction in the copolymer occupies 3% by weight or more, and the glass transition temperature of the homopolymer of each monomer component and the single amount used. It can be substituted with a value calculated based on the Fox formula from the weight fraction of the body.

  The AS preferably contains a component soluble in a solvent such as methyl ethyl ketone from the viewpoint of improving the moldability of the resin composition of the present invention. Here, the methyl ethyl ketone-soluble component in the polymer portion AS refers to a component that dissolves in methyl ethyl ketone when, for example, 2 g of the polymer portion AS is immersed in 100 g of methyl ethyl ketone at room temperature for 12 hours. The methyl ethyl ketone insoluble component in the polymer part AS is a component that is insoluble in methyl ethyl ketone when, for example, 2 g of the polymer part AS is immersed in 100 g of methyl ethyl ketone at room temperature for 12 hours. In the present invention, “comprising a methyl ethyl ketone-soluble component” means containing 15% by weight or more of a methyl ethyl ketone-soluble component, and the methyl ethyl ketone-soluble component is preferably 26% by weight or more, more preferably 41% by weight or more. It is. The methyl ethyl ketone-soluble component is preferably 94% by weight or less, more preferably 79% by weight or less, and particularly preferably 69% by weight or less.

  From the viewpoint of facilitating handling of the high refractive index elastomer A, the AS or a component soluble in a solvent such as methyl ethyl ketone described later has a glass transition temperature of 11 ° C. or higher, more preferably 51 ° C. or higher, and even 71. The refractive index nAS is preferably lower than the refractive index nAC. By setting the relationship between the refractive index nAC and the refractive index nAS as described above, a high refractive index elastomer is obtained. In a molded product obtained by blending A with a resin other than the high refractive index elastomer A, the transparency can be maintained at a high level, or even when it is not transparent, the coloring property when colored is excellent.

  The elastomer A of the present invention is separated into an insoluble portion and a soluble portion by a solvent such as methyl ethyl ketone described later. Since the elastomer A of the present invention contains 70% by weight or more of the polymer AC, which is a component insoluble in the solvent, as described above, the refractive index of the component insoluble in the solvent such as methyl ethyl ketone in the high refractive index elastomer A is The refractive index nAC is basically the same as the refractive index nAC of the polymer AC, and the refractive index of the soluble component in the solvent such as methyl ethyl ketone in the high refractive index elastomer A is basically the refractive index of the polymer AS. The value is almost the same as nAS.

  Thus, the refractive index of the insoluble component of the high refractive index elastomer A of the present invention in a solvent such as methyl ethyl ketone, that is, the refractive index nAC of the polymer AC and the refractive index of the soluble component in the solvent such as methyl ethyl ketone, That is, the refractive index nAS of the polymer AS is obtained by separating the components insoluble in a solvent such as methyl ethyl ketone and soluble components in a solvent such as methyl ethyl ketone by fractionation as described above, and then using a hot press or the like as necessary. It can be measured using an Abbe refractometer 2T manufactured by Atago Co., Ltd.

Alternatively, based on the compositional analysis results of both components, the following mathematical formula is used using the weight fraction w _i of the monomer unit i constituting the component and the refractive index _ni and specific gravity d _i of the homopolymer. The refractive index n of the component calculated by 1 can be used.

Alternatively, in a multistage polymer, the conversion rate of one or more of the above-described monomers is 99% by weight in the presence of a polymer (A _b ) having an insoluble component ratio of 99% by weight or more in a solvent such as methyl ethyl ketone. When the polymerization is carried out as described above, the obtained polymer A is fractionated to obtain the weight fraction wAC of the insoluble component in the solvent such as methyl ethyl ketone and the weight fraction wAS of the soluble component in the solvent such as methyl ethyl ketone. Using these charged weight ratios c _Ab of the polymer (A _b ), the composition ratio of the monomer units constituting each may be calculated, and the respective refractive indexes n may be obtained by applying Formula 1. . That is, since (wAC-c _Ab ) can be attributed to the unit derived from the polymerized monomer, the composition ratio of the monomer unit constituting the polymer (A _b ) and the composition ratio of the polymerized monomer are known. If so, the composition ratio of the insoluble component of the polymer A in a solvent such as methyl ethyl ketone can be obtained. Moreover, the ratio of the polymerized monomer component can be applied to the composition ratio of the soluble component of the polymer A in a solvent such as methyl ethyl ketone. Actually measured values may be used for the refractive index n _i and specific gravity d _i used in Formula 1, and those described in “Polymer Handbook” 1999, 4th edition, published by John Wiley & Son may be used instead.

  The high refractive index elastomer A of the present invention, in particular, the polymer AC can be composed only of (meth) acrylic acid ester AM of aromatic thioalkyl alcohol, but other monomers may be copolymerized and used. it can. Thus, the copolymerizable monomer used for the polymerization of the polymer AC or the polymer AS as a monomer other than AM is, in other words, an ethylenically unsaturated monomer, and a reactive double bond. A monofunctional monomer having one, a monomer containing both a reactive group other than a reactive double bond and a reactive double bond, and a polyfunctional having two or more reactive double bonds in the molecule And other monomers.

  In obtaining the high refractive index elastomer A of the present invention, a known polymerization method can be used. That is, a cationic polymerization method, an anionic polymerization method, a radical polymerization method, coordination polymerization, or the like can be used. Living radical polymerization methods such as RAFT polymerization, ATRP method, and GTRP method can also be used. Industrially, the radical polymerization method is simple and preferably used.

  The high refractive index elastomer A of the present invention can be obtained by bulk polymerization, but can also be obtained by methods such as gas phase polymerization, solution polymerization, and dispersion polymerization. The dispersion polymerization is a concept including suspension polymerization, emulsion polymerization, miniemulsion polymerization, microsuspension polymerization, precipitation polymerization, emulsion suspension polymerization, suspension seed polymerization and the like. Of these, emulsion polymerization, miniemulsion polymerization, and microsuspension polymerization are preferably used from the viewpoint of being able to have a multilayer structure / graft structure and the like and having a low environmental load without using an organic solvent, particularly preferably. Emulsion polymerization is used.

  A reaction solvent used for solution polymerization of the high refractive index elastomer A, an auxiliary material such as an emulsifier, a dispersant, a buffer and a cosolvent used for dispersion polymerization, reaction conditions, a high refractive index elastomer A from a solution or a dispersion liquid. A known method can be applied as the recovery method.

  As a polymerization initiator used in the cationic polymerization method, an aromatic sulfonium salt or an acid such as hydrogen iodide can be used. Examples of the polymerization initiator used in the anionic polymerization method include alkyl lithium such as butyl lithium. As polymerization initiators used in the radical polymerization method, azo compounds such as azobisisobutyronitrile and azobisisovaleronitrile, benzoyl peroxide, lauroyl peroxide, cumene hydroperoxide, t-butyl-peroxy-isopropyl carbonate, t -Peroxides such as butyl hydroperoxide, p-menthane hydroperoxide, hydrogen peroxide, potassium persulfate, and the like can be used. In particular, when a highly water-soluble peroxide represented by t-butyl hydroperoxide, hydrogen peroxide, and potassium persulfate is selected, the content of low molecular weight peroxide in the high refractive index elastomer A can be reduced. Since the yellowness of the molding obtained in this is good, it is preferable. Here, high water solubility means that the solubility in pure water at 23 ° C. is 0.2% by weight or more, preferably 1% by weight or more, more preferably 1.6% by weight, and further 2%. Peroxides having a solubility of greater than or equal to weight percent are preferred. Peroxides not only generate radicals by thermal decomposition, but also metal ion components such as iron ion complexes and, if necessary, chelating agents such as disodium ethylenediaminetetraacetate, reducing agents such as sucrose and sodium formaldehyde sulfoxylate. Can be used as a so-called redox initiator. In the case of applying emulsion polymerization, a radical polymerization method is preferably used.

  In obtaining the high refractive index elastomer A of the present invention, chain transfer agents such as 2-ethylhexyl thioglycolate, t-dodecyl mercaptan, n-decyl mercaptan, and terpinolene can be used. In particular, when used together with a methacrylic acid ester, the thermal stability of the polymer A may be improved, which is preferable.

((Meth) acrylic ester AM of aromatic thioalkyl alcohol)
The aromatic thioalkyl group of the (meth) acrylate ester AM of the aromatic thioalkyl alcohol according to the present invention includes a substituted or unsubstituted aromatic group such as a phenyl group, a naphthyl group, and a biphenyl group, and methylene, ethylene, propylene. And those in which an alkylene group such as butylene is bonded via a thioether bond.

  As the (meth) acrylic acid ester AM of the aromatic thioalkyl alcohol according to the present invention, those having only one radical polymerizable group are preferable from the viewpoint of imparting a low Tg without forming an unnecessary crosslinked structure, Most preferred is phenylthioethyl acrylate. Phenylthioethyl acrylate can be easily obtained from the market as, for example, the product name “PhSEA” of Osaka Organic Chemical Co., Ltd. and the product name “BX-PTEA” of BIMAX CHEMICALS.

  In the case where the aromatic group has a substituent, an alkyl group, a halogen, a carboxyl group, an amino group, a sulfone group, a cyano group, or the like can be used as the substituent. Is less and preferable. It is preferable to use an aromatic group having no substituent because it is easy to maintain the transparency of the molded product obtained by blending with the resin B, and when it is colored, it is excellent in color developability. Similarly, for the reason of transparency, the alkylene group is preferably a methylene group or an ethylene group. The (meth) acrylic acid as referred to in the present invention generally refers to methacrylic acid and / or acrylic acid. Among the aromatic thioalkyl alcohol (meth) acrylic acid esters AM that can be used in the high refractive index elastomer A of the present invention, the molded product obtained by blending with the resin B exhibits a good impact resistance. (Meth) acrylic acid esters are preferably used. Similarly, for reasons of impact resistance, acrylic acid esters are more preferably used.

(Copolymerizable monomer)
Hereinafter, the monofunctional monomer having one reactive double bond mentioned in the above-mentioned copolymerizable monomer, both reactive groups other than reactive double bonds and reactive double bonds are contained. A monomer and a polyfunctional monomer having two or more reactive double bonds in the molecule will be described.

  Monofunctional monomers having one reactive double bond include vinyl cyanides, cyano (meth) acrylates, aromatic vinyl monomers, (substituted or unsubstituted) alkyl (meth) acrylates. , Aromatic (meth) acrylates, (thio) ether group-containing vinyls, halogenated vinyls, alkenes, (meth) acrylamides, and the like. In the present invention, (meth) acrylate refers to methacrylate and acrylate as a whole, and (meth) acryl refers to methacryl and acrylic as a whole. Examples of the vinyl cyanides include acrylonitrile and methacrylonitrile; cyano (meth) acrylates include cyanoacrylate and cyanomethacrylate; aromatic vinyl monomers include styrene, α-methylstyrene, monochlorostyrene, Dichlorostyrene, vinyltoluene, vinylnaphthalene, vinylbiphenyl, 1,1′-diphenylethylene, acenaphthylene, etc .; (substituted or unsubstituted) alkyl (meth) acrylates include methyl acrylate, ethyl acrylate, butyl acrylate, octyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, stearyl acrylate, methoxyethyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, oct Methacrylate, lauryl methacrylate, cyclododecyl methacrylate, myristyl methacrylate, stearyl methacrylate, behenyl methacrylate, adamantyl methacrylate and the like; aromatic (meth) acrylates include phenyl acrylate, phenyl methacrylate, benzyl acrylate, benzyl methacrylate, phenoxyethyl acrylate, o- Phenylphenyloxyethyl acrylate, etc .; (thio) ether group-containing vinyls such as vinyl phenyl sulfide; vinyl halides such as vinyl chloride, vinylidene chloride, vinyl bromide, chloroprene, etc .; alkenes such as ethylene, propylene, Butylene, isobutylene, etc .; (meth) acrylamides include acrylamide, methacrylamide, Examples include dodecyl methacrylamide, cyclododecyl methacrylamide, adamantyl methacrylamide and the like.

  As a monomer containing both a reactive group other than the reactive double bond and a reactive double bond, a hydroxyl group, a thiol group, an amino group, an epoxy group, a carboxylic acid group, a sulfonic acid group, a phosphoric acid group, There are vinyl monomers with groups such as cyanate group, isocyanate group, hydrolyzable silyl group, etc., among them, reaction is possible due to the presence of heat, water and oxidizing substances such as epoxy group, hydrolyzable silyl group, thiol group A vinyl monomer having a reactive group is preferable, and an epoxy group-containing vinyl monomer is particularly preferably used because of its simplicity. By incorporating reactive groups other than these reactive double bonds into the polymer of the present invention, the dispersion of the polymer into the matrix resin is promoted by reaction with the matrix resin and other compounding components during processing. Therefore, it contributes to the improvement of physical properties such as appearance and mechanical properties. When an epoxy group-containing vinyl monomer is used, it may self-crosslink to give an elastic polymer. Examples of such monomers include hydroxyl group-containing vinyl monomers such as hydroxyethyl methacrylate and 4-hydroxybutyl acrylate; epoxy group-containing vinyl monomers such as glycidyl methacrylate and (3,4-epoxycyclohexyl) methyl methacrylate. Body; vinyl carboxylic acid such as acrylic acid, methacrylic acid and maleic acid; sulfonic acid group-containing vinyl monomer such as 2-acrylamido-2-methylpropane sulfonic acid and styrene sulfonic acid; 3-methacryloyloxypropyldimethoxymethylsilane And hydrolyzable silyl group-containing vinyl monomers such as 3-acryloyloxypropyltrimethoxysilane and vinylphenyldimethoxymethylsilane.

  Examples of the polyfunctional monomer having two or more reactive double bonds in the molecule include allyl (meth) acrylate, ethylene glycol dimethacrylate, 1,3-butylene glycol dimethacrylate, fluorene bis (4- (meta ) (Meth) acrylate polyfunctional monomers such as acryloyloxyphenyl); dienes such as butadiene and isoprene; aromatic vinyl polyfunctional such as divinylbenzene, diisopropenylbenzene, divinylnaphthalene and divinylanthracene Aromatic monomers such as triallylbenzene tricarboxylate and diallyl phthalate; tertiary amines such as triallylamine; diallyl isocyanurate, diallyl-n-propyl isocyanurate, triallyl isocyanurate ,bird Isocyanuric acid derivatives such as taryl isocyanurate and tris ((meth) acryloxyethyl) isocyanurate; cyanuric acid derivatives represented by triallyl cyanurate; tri (meth) acryloyl hexahydrotriazine; 2,2′-divinylbiphenyl; 2,4′-divinylbiphenyl, 3,3′-divinylbiphenyl, 4,4′-divinylbiphenyl, 2,4′-di (2-propenyl) biphenyl, 4,4′-di (2-propenyl) biphenyl, And biphenyl derivatives such as 2,2′-divinyl-4-ethyl-4′-propylbiphenyl and 3,5,4′-trivinylbiphenyl. When it is preferable to produce a gel component, it may be efficiently achieved by using allyl (meth) acrylate. Isocyanuric acid derivatives, cyanuric acid derivatives, and biphenyl derivatives are preferable for enhancing the thermal stability of the polymer. Particularly, triallyl isocyanurate, 2,2′-divinylbiphenyl, 2,4′-divinylbiphenyl, 3,3′- Divinylbiphenyl and 4,4′-divinylbiphenyl can be most preferably used.

  Among these, the polymer obtained by polymerizing alone has a glass transition temperature (Tg) of −15 ° C. or less, for example, dienes, particularly conjugated dienes represented by butadiene, butyl acrylate, 2-ethylhexyl acrylate, etc. C 4-8 linear or branched alkyl acrylates, phenoxyethyl acrylates, acrylates containing ether bonds such as methoxyethyl acrylate, etc. are the (meth) aromatic thioalkyl alcohols that are essential in the present invention. By copolymerizing with acrylic ester AM, a copolymer having a high refractive index and a low Tg can be obtained, and it is preferably used when particularly good impact resistance is required. Among these, the use of acrylates is preferable from the viewpoint of good light resistance and weather resistance.

(Multistage polymer)
It is preferable that the high refractive index elastomer A has a multistage structure or a graft structure for the purpose of producing a good balance between transparency and impact resistance when the high refractive index elastomer A is blended with a resin to form a molded body. Used. The high refractive index elastomer A having such a structure is polymerized by adding a first component having a desired monomer composition to the reaction system, preferably by miniemulsion polymerization, microsuspension polymerization, more preferably emulsion polymerization. Preferably, particles comprising the components are obtained, and then a second component of the same or different composition is added to the reaction system and polymerized to form a polymer comprising the second component in the presence of the polymer comprising the first component. Thus, it can be obtained by repeatedly polymerizing the third and subsequent components as necessary. In this case, in at least one of the components, both a polyfunctional monomer having two or more reactive double bonds in the molecule and / or reactive groups other than reactive double bonds and reactive double bonds are combined. Insoluble in solvents such as methyl ethyl ketone in the high refractive index elastomer A by using the monomer to be contained together with a monofunctional monomer having one reactive double bond, if necessary, to form a crosslinked polymer New components can be generated.

  Thus, it is preferable that the high refractive index elastomer A of the present invention is a multistage polymer, and the graft polymer is such that the dispersion contributing component AS is firmly bonded to the polymer AC that is the elastic contribution component. It is preferable to use a core / shell type graft polymer.

  When the high refractive index elastomer A of the present invention is preferably a core / shell type graft polymer, the polymer AC according to the present invention becomes a core layer of the core / shell type graft polymer, and according to the present invention. The polymer AS becomes a shell layer, and the dispersion contributing component AS becomes a shell layer distributed on the outermost side of A, and does not contribute to the dispersion. AC which is an elastic contribution component which becomes large becomes a core layer distributed inside A.

  Thus, when the elastomer A of the present invention, which is a core / shell type graft polymer, is separated into an insoluble component and a soluble component by a solvent such as methyl ethyl ketone described later, the component insoluble in the solvent is the core layer. A polymer AC and a part of the shell layer of the polymer AS insoluble in the solvent by grafting to the polymer AC, and a solvent-soluble component such as methyl ethyl ketone is a free polymer that has not been grafted to the polymer AC Part of the resulting polymer AS.

  Here, it is clear that the refractive index of a component soluble in a solvent such as methyl ethyl ketone in the high refractive index elastomer A is basically the same value as the refractive index nAS of the polymer AS. It is also the refractive index of the shell layer of the shell-type graft polymer. The refractive index of the insoluble component in the solvent such as methyl ethyl ketone in the high refractive index elastomer A is determined from the polymer AC that is the core layer and a part of the polymer AS that is insoluble in the solvent by being grafted thereto. In the present invention, the ratio of the polymer AC in the high refractive index elastomer A is 70% by weight or more, and the shell layer has a diameter of the core layer that is considered to be substantially spherical. Therefore, the refractive index of the insoluble component in the solvent such as methyl ethyl ketone can be basically regarded as the refractive index nAC of the polymer AC.

Here, when blending the high refractive index elastomer A of the present invention with a polycarbonate resin, from the viewpoint of compatibility, in the final stage of polymerization to obtain the polymer AS, a monomer mainly composed of methyl methacrylate is used. It is preferable to use it. Furthermore, it is more preferable that methyl methacrylate is the main component in the entire polymer AS. When the polymer AS is obtained by polymerization, methyl methacrylate can be used together with the monomers listed above as the copolymerizable monomer and (meth) acrylic acid ester AM of aromatic thioalkyl alcohol. .
The above-mentioned main component of methyl methacrylate means that the amount of each monomer component to be copolymerized does not exceed the amount of methyl methacrylate used, and preferably 50% by weight of the monomer used. More preferably, 56% by weight or more, more preferably 67% by weight or more is occupied by methyl methacrylate. Although methyl methacrylate can be used alone, it is preferable from the viewpoint of thermal stability to copolymerize with a monomer other than methacrylate, for example, alkyl acrylate such as ethyl acrylate. Preferred examples of the combination of monomers used in obtaining the polymer AS include methyl methacrylate / ethyl methacrylate, methyl methacrylate / styrene, methyl methacrylate / phenyl methacrylate, and more preferred examples include methyl methacrylate / phenylthioethyl acrylate, methyl methacrylate / Phenoxyethyl acrylate, methyl methacrylate / phenyl acrylate, methyl methacrylate / phenyl thioethyl acrylate / styrene, methyl methacrylate / phenoxy ethyl acrylate / styrene, methyl methacrylate / phenyl methacrylate / ethyl acrylate, methyl methacrylate / phenyl methacrylate / phenyl thioethyl acrylate, methyl Methacrylate / Phenylmeta Relate / phenoxyethyl acrylate, and methyl methacrylate / phenyl methacrylate / phenyl acrylate.

(particle)
The high-refractive index elastomer A of the present invention is preferably a particle in order to exhibit good impact resistance, and is preferably a multistage polymer particle in order to take a good dispersion state in the resin B. More preferably, it is a core / shell type graft polymer. In order to achieve both impact resistance and transparency, the upper limit of the particle diameter is preferably 5 μm, more preferably 1 μm, further 0.6 μm, particularly 0.37 μm, and the lower limit is preferably 0.07 μm, more preferably 0.12 μm. Further, it is 0.16 μm, particularly 0.21 μm.

  In order to obtain multistage polymer particles, a core of polystyrene, polymethyl methacrylate, poly (styrene-alkyl acrylate) copolymer or the like is preferably formed by a dispersion polymerization method such as emulsion polymerization. The polyfunctional monomer may be used in combination with or without crosslinking, and in the presence thereof, (meth) acrylic acid ester AM of aromatic thioalkyl alcohol, preferably phenylthioethyl acrylate Is optionally polymerized with alkyl acrylates such as butyl acrylate, 2-ethylhexyl acrylate, n-octyl acrylate, 4-hydroxybutyl acrylate, methoxyethyl acrylate, and, if necessary, the aforementioned polyfunctional monomer, An elastomer component is formed, and in the presence of A monofunctional monomer having a glass transition temperature of a homopolymer such as tacrylate or styrene exceeding 70 ° C., an acrylate such as phenylthioethyl acrylate, ethyl acrylate, or methyl acrylate, if necessary, the reactive double A method of polymerizing together with a monomer containing both a reactive group other than a bond and a reactive double bond may be employed.

(Fractionation solvent)
The separation solvent that can be used for separating the high refractive index elastomer A of the present invention into an insoluble component and a soluble component with a solvent such as methyl ethyl ketone is not particularly limited, but is preferably a good solvent for the high refractive index elastomer A. Preferably, methyl ethyl ketone can be used. In obtaining the insoluble content in these solvents and the ratio of soluble components in the solvent, for example, impurities derived from auxiliary materials such as emulsifiers mixed in the case of production by an emulsion polymerization method are not taken into consideration. Contaminants can be separated with water or methanol. Specifically, the solid component recovered by reprecipitation of methyl ethyl ketone-soluble matter in methanol can be regarded as a soluble component of the high refractive index elastomer A in methyl ethyl ketone, and the methanol soluble component as a contaminant. In this case, the weights of the insoluble component in methyl ethyl ketone and the soluble component in methyl ethyl ketone are determined by drying the solids recovered from methanol reprecipitation from the methyl ethyl ketone insoluble component and the methyl ethyl ketone soluble component, respectively, and accurately weighing the weights. Can be sought. The proportion of the insoluble component in the high refractive index elastomer A of the present invention is 0.01% to 99.99% by weight, and the proportion of the soluble component is correspondingly 99.99% to 0.01% by weight. Preferably, the insoluble content in methyl ethyl ketone is 55 wt% to 99 wt%, the soluble component in methyl ethyl ketone is 45 wt% to 1 wt%, and more preferably in the methyl ethyl ketone insoluble content is 76 wt% to 97 wt%. The soluble component is 24 wt% to 3 wt%.

(High refractive index elastomer-containing resin composition)
The high refractive index elastomer-containing resin composition of the present invention has a high refractive index elastomer A of 1 to 15 parts by weight, preferably 2.6 to 9.5 parts by weight of the present invention described later except for the high refractive index elastomer A component. It is a resin composition added to 100 parts by weight of the resin B.

  The refractive index nB of the resin B according to the present invention needs to be lower than the nAC, and is preferably higher than the nAS, and more preferably, the difference between the refractive indexes nA and nB of the high refractive index elastomer A is In this way, by setting the relationship between the refractive index nAC, the refractive index nAS, and the refractive index nB, in the molded body made of the resin composition of the present invention, transparency is highly maintained. Even if it is not related to transparency, it can be made excellent in color developability when colored.

  The mixing of the high refractive index elastomer A and the resin B of the present invention is carried out by an ordinary known kneading machine. Examples of such machines include a mixing roll, a calendar roll, a Banbury mixer, a Henschel mixer, a ribbon blender, a kneader, an extruder, a blow molding machine, and an inflation molding machine.

(Resin B)
The resin B used in the present invention is at least one selected from a thermoplastic resin, a thermosetting resin, and an elastomer resin. The resin B forms a continuous phase in the resin composition of the present invention, and can contain the high refractive index elastomer A of the present invention as a dispersed phase.

  When the high refractive index elastomer A of the present invention is combined with a particularly transparent resin among the above resins, it is preferable because a transparent molded product can be easily obtained from the obtained resin. Moreover, even when combined with an opaque resin, the color developability when colored is excellent. From the viewpoint of sufficiently exhibiting the effect of the addition of the high refractive index elastomer A of the present invention, it is preferable to use a resin having a refractive index exceeding 1.57 as the resin B.

  Among these resins, it is preferable to use the resin B as a thermoplastic resin because a molded article having excellent mechanical strength can be produced at a low cost and in large quantities, and among the thermoplastic resins, an aromatic that is a transparent and high-strength resin. It is preferable to use a polycarbonate resin. When an elastomer component having a blending amount sufficient to improve impact resistance is used in such a resin, specifically, for example, when 4 parts by weight of elastomer is blended with 100 parts by weight of the resin, the conventional technique has a thickness of 2 mm. It was impossible to secure transparency with a haze ratio of 10% or less according to JIS K7105. However, when the high refractive index elastomer A of the present invention was used together with a resin B with a refractive index of 1.57 or more, haze The rate is 10% or less, preferably 7% or less, more preferably 4% or less, and a molded product having both high transparency and impact resistance can be obtained, which is preferable.

When the resin B used in the present invention is a transparent resin, the refractive index nB is the same as that of the insoluble component of the polymer A in a solvent such as methyl ethyl ketone and the soluble component in a solvent such as methyl ethyl ketone. It can be obtained using a meter. If the components are known, those described in the fourth edition of “Polymer Handbook” 1999 published by John Wiley & Son can be used instead. In the case where the resin B is a copolymer, the refractive index nB can be obtained using the above-described Equation 1 as in the case of each component of the polymer A. When the resin B is composed of a plurality of polymer components compatible with each other, the weight fraction w _p of each polymer component p, its refractive index n _p and specific gravity d _p were used to calculate by the following formula 2. A value can be used.

The refractive index n _p and specific gravity d _p of each polymer component used here may be measured values, and those described in “Polymer Handbook” 1999, 4th edition, published by John Wiley & Son, can be substituted.

  In the present invention, the resin B is preferably a continuous phase, and the high refractive index elastomer A component is uniformly dispersed in the resin B component. It is preferable from the viewpoint of improvement.

  The term “uniformly dispersed” means, for example, that the high refractive index elastomer A of the present invention is formed as particles that are one of the particularly preferred embodiments, and the number average dispersed particles in the resin B of the particles. The upper limit of the diameter is preferably 5 μm, further 1 μm, further 0.6 μm, particularly 0.37 μm, and the lower limit is preferably 0.07 μm, further 0.12 μm, further 0.16 μm, In particular, it is 0.21 μm. The dispersed particle diameter can be determined by observation with a transmission electron microscope (TEM) of the resin composition of the present invention containing the high refractive index elastomer A and the resin B.

  In addition, the “uniformly dispersed” according to another embodiment means, for example, that the high refractive index elastomer A of the present invention is one of its preferred embodiments and has a molecular weight of 5,000 or more, preferably 11,000 or more. Furthermore, it is formed as a linear or branched polymer having a molecular weight of 51,000 or more and 10 million or less, preferably 7 million or less, and is so-called molecular compatible dispersed in a single molecule in the resin B. That is. Whether or not the high refractive index elastomer A has a domain is determined by observing a molded body of the resin composition of the present invention containing the high refractive index elastomer A and the resin B with a transmission electron microscope (TEM). It can be judged by how.

(Thermoplastic resin)
Examples of the thermoplastic resin include polycarbonate resins, polyester resins, polyester carbonate resins, polyarylene ether resins, polyarylene sulfide resins, polyether sulfone resins, polysulfone resins, polyarylene resins, polyamide resins, and polyetherimide resins. , Polyacetal resin, polyvinyl acetal resin, polyketone resin, polyether ketone resin, polyether ether ketone resin, polyaryl ketone resin, polyether nitrile resin, liquid crystal resin, polybenzimidazole resin, polyparabanic acid resin, diene compound, maleimide compound, One or more vinyl monomers selected from the group consisting of aromatic alkenyl compounds, methacrylic acid esters, acrylic acid esters and vinyl cyanide compounds; Vinyl polymers obtained by coupling or copolymer or a copolymer resin or the amine-modified resin or dealcoholation, (anhydride of) resins, polyolefin resins, vinyl chloride resins. These can be used alone or in a blend of two or more.

  From the viewpoint of transparency, aromatic polycarbonate resin, amorphous polyester resin, polyester carbonate resin, polyether sulfone resin, polysulfone resin, amorphous vinyl polymer or copolymer resin, and vinyl chloride resin are particularly preferable. .

  Furthermore, an aromatic polycarbonate resin is most preferable from the viewpoint of impact resistance.

(Thermosetting resin)
Examples of the thermosetting resin include epoxy resin, phenol resin, urea resin, melamine resin, polyimide resin, polyamideimide resin, thermosetting polyester resin (unsaturated polyester resin), alkyd resin, silicone resin, urethane resin, and polyvinyl ester. Examples thereof include resins, diallyl polyphthalate resins, bismaleimide-triazine resins, furan resins, xylene resins, guanamine resins, maleic resins, dicyclopentadiene resins, oxetane resins, and cyanate ester resins.

(Elastomer resin)
Examples of the elastomer resin include natural rubber, acrylic rubber such as butyl acrylate rubber, ethyl acrylate rubber, and octyl acrylate rubber, nitrile rubber such as butadiene-acrylonitrile copolymer, chloroprene rubber, butadiene rubber, isoprene rubber, and isobutylene rubber. Styrene-butadiene rubber, methyl methacrylate-butyl acrylate block copolymer, styrene-isobutylene block copolymer, styrene-butadiene block copolymer, hydrogenated styrene-butadiene block copolymer, ethylene-propylene copolymer (EPR ), Hydrogenated ethylene-butadiene copolymer (EPDM), polyurethane, chlorosulfonated polyethylene, silicone rubber (millable type, room temperature vulcanized type, etc.), butyl rubber, fluoro rubber, Synthesis of olefin-based thermoplastic elastomer, styrene-based thermoplastic elastomer, vinyl-based thermoplastic elastomer, urethane-based thermoplastic elastomer, polyamide-based thermoplastic elastomer, polyester-based thermoplastic elastomer, fluorine-based thermoplastic elastomer, silicone-based thermoplastic elastomer, etc. Rubber.

(Other additives)
In the high refractive index elastomer-containing resin composition of the present invention, a compounding agent that is usually used, that is, an antioxidant, an anti-dripping agent, a flame retardant, an impact modifier, a plasticizer, is used as necessary. , Lubricants, melt viscosity (elasticity) regulators such as high molecular weight polymethylmethacrylate resins, UV absorbers, pigments, fiber reinforcing agents such as glass fibers, antistatic agents, and flow of terpene resin / acrylonitrile-styrene copolymer A property improver, a release agent such as monoglyceride, silicone oil, polyglycerin, a compatibilizer, a coupling agent between a filler and a matrix resin, and the like can be appropriately blended.

  As said antioxidant, a phenolic antioxidant, phosphorus antioxidant, sulfur type antioxidant, etc. can be used. These can be used alone or in combination.

  Examples of the anti-dripping agent, particularly, anti-dripping agents in combustion tests such as UL-94 test, include fluorine resins such as polytetrafluoroethylene and polyvinylidene fluoride, or polytetrafluoroethylene and (meth) acrylic acid esters. It is possible to use powders, polyorganosiloxanes or silicone resins, polyamideimides, etc. that are compounded with other polymers such as polymers obtained by polymerizing aromatic alkenyl compounds, vinyl cyanide, etc. The amount is preferably 2 parts by weight or less per 100 parts by weight of the matrix resin, more preferably 1 part by weight or less, further 0.6 parts by weight or less, preferably 0.1 parts by weight or more. When dripping becomes a problem, the prevention effect is obtained and preferable.

  Examples of the flame retardant include phosphoric acid esters represented by red phosphorus, bisphenol-bis (diphenyl phosphate) and triphenyl phosphate, condensed phosphoric acid esters, tetrabromobisphenol-A, and tris (2,3-dibromopropyl). Examples include isocyanurate, hexabromocyclodecane, phosphazene, melamine cyanurate, and urea resin. When resin B is an aromatic polycarbonate resin, potassium perfluorobutanesulfonate, potassium diphenylsulfone-3-sulfonate, potassium salt of 4-methyl-N- (4-methylphenyl) sulfonyl-benzenesulfonamide, A metal salt of organic sulfonic acid such as potassium diphenylsulfone-3-3′-disulfonate, sodium paratoluenesulfonate, sodium xylenesulfonate, sodium dodecylbenzenesulfonate can be used.

  Examples of the impact resistance improver include butadiene-methyl methacrylate-styrene copolymer (MBS), alkyl (meth) acrylate rubber, or composite rubber composed of polyorganosiloxane and alkyl (meth) acrylate rubber, methyl methacrylate, styrene, acrylonitrile. And those obtained by graft copolymerization of vinyl monomers in the presence of polyorganosiloxane. Etc.

  The fillers include talc, mica, calcium carbonate, silica, polyorganosilsesquioxane, titanium oxide, zinc oxide nanoparticles, zirconia, layered silicate, metal particles, fullerene, carbon nanotube, multi-wall carbon nanotube, carbon black. -Examples of the antistatic agent such as fly ash and whisker include polyamide-polyether block, alkylene glycol, glycerin, fatty acid ester and the like.

  Examples of the fiber reinforcing agent include glass fiber, vegetable fiber, and carbon fiber.

  Examples of the compatibilizer include functional group-containing polyorganosiloxanes such as epoxy group-containing polyorganosiloxanes, and (epoxy-modified) styrene-butadiene-styrene block copolymers.

  Examples of the coupling agent between the filler and the matrix resin include polyols, silane coupling agents, and titanium coupling agents.

  When the matrix resin is a thermoplastic resin or an elastomer, a small amount of the thermosetting resin such as a phenol resin can be added as a carbonization accelerator.

  When finally obtaining a transparent molded product having a haze ratio of 5% or less, it is preferable to avoid the use of fiber reinforcing agents, fillers, and anti-dripping agents.

(Molding method)
As a molding method of the resin composition of the present invention, when obtained from the high refractive index elastomer A of the present invention and a thermoplastic resin, a molding method used for molding a normal thermoplastic resin composition, that is, an injection molding method, Extrusion molding, blow molding, calendar molding, inflation molding, rotational molding, injection press molding, and the like can be applied. Moreover, when it obtains from a thermosetting resin, after introduce | transducing the resin composition of this invention into a type | mold etc., the method of hardening by heating etc. can be applied. When it is obtained from an elastomer, it is molded into a shape according to the molding purpose by a molding method such as slush molding, injection molding or hot press molding, and vulcanized as necessary to form a molded product.

(Use)
The molded product obtained from the resin composition of the present invention has excellent impact resistance and excellent colorability, and its use is not particularly limited. For example, desktop computers, notebook computers, and liquid crystals Display, Plasma display, Field emission display, Projector, Projection television, PDA, Printer, Copy machine, Fax, (Portable) Audio device, (Portable) Video device, (Portable) Telephone, Lighting device, Game console, Digital video Cameras, digital cameras, video recorders, hard disk video recorders, DVD recorders, water heaters, rice cookers, microwave ovens, microwave ovens, clocks, automatic ticket gates, automatic ticketing machines, heat pumps (air conditioners, etc.), co-generators, etc. Battery products, home appliances, industrial equipment, battery / capacitor parts for benches, playground equipment, automobiles, LED video display devices, display materials in power supply boxes, telephone jacks, terminal block covers, coil bobbins, transformers, etc. Electrical parts, electrical and electronic materials such as sealants, adhesives, sealing materials, glass vibration prevention materials, automotive parts such as heater fans, handles, vibration damping materials, shift levers, wire sheaths, doors, windows, partitions, Building materials such as fans, signs for roads, airports, stations, harbors, various medical equipment, various care products, toys, sports equipment, protective equipment such as shields, protectors, goggles, helmets and masks, railway windows and display devices -Vehicle parts such as lighting and driver's seat panels, aircraft parts such as aircraft windows and cockpit panels, parts such as ships, furniture, etc. Applications can be mentioned that sexual and coloring properties, such as is required. In addition, the above-mentioned office products, home appliances, industrial equipment, medical equipment, nursing care supplies such as windows and surface parts that require transparency, lighting, electrical decorations, and light transmission parts of display devices, aircraft・ Applications that require impact resistance and transparency, such as windows for ships, railway vehicles, automobiles, buildings, etc., building materials that require transparency, such as partitions, doors, and exhibition equipment, and sign surface layers .

  EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to these examples. In addition, the measurement and test in the following were performed as follows.

(Polymerization conversion)
First, a part of the obtained latex was collected and precisely weighed and dried in a hot air dryer at 130 ° C. for 1 hour, and the weight after drying was precisely weighed as the solid content. Next, the ratio of the result of precise weighing before and after drying was determined as the ratio of solid components in the latex. Finally, using this solid component ratio, the polymerization conversion rate was calculated by the following mathematical formula 3. In Formula 3, the chain transfer agent was handled as a charged monomer.

(Volume average particle diameter)
The volume average particle diameter of the elastomer particles and the graft copolymer was measured in a latex state. The volume average particle diameter (μm) was measured using MICROTRAC UPA150 manufactured by Nikkiso Co., Ltd. as a measuring device.

(Recovery of methyl ethyl ketone insoluble component and methyl ethyl ketone soluble component, methyl ethyl ketone insoluble component weight fraction)
About 2 g of the high refractive index elastomer A of the present invention is precisely weighed, then immersed in about 100 g of methyl ethyl ketone, which is a free polymer extraction solvent, at room temperature for 12 hours, and then the gel content is precipitated by an ultracentrifuge. And separated into a supernatant and a gel content. Addition of methyl ethyl ketone and ultracentrifugation were repeated twice more on the collected gel. The ultracentrifugation was carried out using a super centrifuge CP-60E manufactured by Hitachi Koki Co., Ltd., equipped with a P70AT as a rotor, at 30,000 rpm for 1 hour per time. The gel part finally recovered in this way was dried under reduced pressure at 40 ° C., and recovered as a methyl ethyl ketone insoluble component. The weight after drying was defined as methyl ethyl ketone insoluble component weight.

  Next, all the supernatants soluble in methyl ethyl ketone were concentrated until the solution was about 20 g, and this was dropped into 300 ml of methanol to reprecipitate the free polymer as a component insoluble in methanol and filtered off. Later, this was further dried, whereby the dried free polymer was recovered and used as a methyl ethyl ketone-soluble component. The weight after drying was defined as the methyl ethyl ketone soluble component weight.

  The methyl ethyl ketone insoluble component weight fraction was determined by the following mathematical formula 4.

(Low molecular peroxide content)
A 2% by weight solution of a polymer sample was prepared using high-purity acetone (Kanto Chemical Co., Ltd., 5000 times concentrated), extracted overnight, filtered through a disk filter, and subjected to gas chromatography / mass spectrometry (GC / MS ) Quantitative analysis of the residual amount of peroxide used in the synthesis was performed. GC 6890plus (Agilent Technologies) was used for GC, 5973 (Agilent Technologies) was used for MS, and DB-1701 0.25 ml Dx30m (Agilent Technologies) was used for the column. The detection limit is 50 ppm.

(Glass-transition temperature)
Using a differential scanning calorimeter (DSC) SSC-5200 manufactured by Seiko Instruments Inc., the sample was once heated to 140 ° C. and then preliminarily adjusted to −60 ° C. at a rate of 10 ° C./min and held for 5 minutes. Then, measurement was performed while the temperature was raised to 140 ° C. at a rate of temperature increase of 10 ° C./min, the glass transition start point was read from the obtained DSC curve, and the glass transition temperature was determined.

(Impact resistance)
In accordance with ASTM D-256, the Izod test was used for evaluation.

(Total light transmittance / haze ratio)
The total light transmittance and haze ratio of the sample were measured with a haze meter NDH2000 manufactured by Nippon Denshoku Industries Co., Ltd. according to JIS K7105.

(Yellowness)
In accordance with JIS K7105, the colorimetric color difference meter ZE-2000 manufactured by Nippon Denshoku Industries Co., Ltd. was used.

(Refractive index)
According to JIS K7142, the refractive index (nD) at the sodium D-line wavelength was measured using an Abbe refractometer 2T manufactured by Atago Co., Ltd.

(Liquidity)
In accordance with JIS K7210 and ISO 7391-1, the measurement was performed using a melt indexer P-101 manufactured by Toyo Seiki Seisakusho at a load of 1.2 kg at 300 ° C.

(Flame retardance)
Flame retardancy was evaluated according to the UL-94 vertical test (19 mm frame).

(Production Example 1) Production of elastomer particles (R-1) In a 7-neck flask equipped with a stirrer, reflux condenser, nitrogen blowing port, monomer addition port, and thermometer, 180 parts by weight of ion-exchanged water, alkylbenzene Sodium sulfonate (SDBS, manufactured by Kao Corporation, trade name: Neoperex G15) 0.04 part by weight (solid content) was charged, and the temperature was raised to 50 ° C. while blowing nitrogen at 0.1 L / min. 1 hour after reaching 50 ° C., 8.3 parts by weight of phenylthioethyl acrylate (PhSEA, manufactured by Osaka Organic Chemical Industry Co., Ltd.), 0.2 part by weight of butyl acrylate (BA), 0. A mixture of 04 parts by weight and 0.005 parts by weight of t-butyl hydroperoxide (tBHP) was added all at once. After 15 minutes, 0.006 parts by weight of ethylenediaminetetraacetic acid disodium, 0.0015 parts by weight of iron (II) sulfate heptahydrate, and 0.05 parts by weight of Rongalite were added all at once, and the polymerization was started for 1 hour. Retained.

  Next, 0.12 parts by weight of SDBS was added, and then a mixture of 74.7 parts by weight of PhSEA, 1.8 parts by weight of BA, 0.6 parts by weight of AlMA, and 0.02 parts by weight of tBHP was continuously added over 5 hours. Simultaneously with the start of continuous addition of the mixture, continuous addition of 0.5 parts by weight of SDBS in 5% aqueous solution over 3 hours was started simultaneously. An elastomer particle which is a polymer of a monomer mixture containing phenylthioethyl acrylate as a main component after adding 0.01 part by weight of tBHP to a value of 30 minutes from the end of continuous addition of the mixture and performing post-polymerization for 1 hour. A latex of (R-1) was obtained. The solid content concentration was 24% by weight, the polymerization conversion was 100% by weight, and the volume particle diameter was 220 nm.

  To 5 g of the latex, 45 g of methanol and 0.1 g of a 35 wt% calcium chloride aqueous solution were added, and the solid content of the elastomer particles (R-1) was recovered. The refractive index was 1.595, the methyl ethyl ketone insoluble component weight fraction was 99% by weight, and the glass transition temperature was −15.5 ° C.

Example 1 Production of Multistage Polymer Particles (G-1) Subsequent to the production of the latex of elastomer particles (R-1) of Production Example 1, 10 parts by weight of methyl methacrylate (MMA), PhSEA A mixture of 8 parts by weight, 2.2 parts by weight of styrene (St) and 0.06 parts by weight of tBHP was continuously added over 1 hour. After 30 minutes, 0.05 part by weight of tBHP was added, and further post-polymerization was performed for 2 hours to obtain a latex of multistage polymer particles (G-1). The solid content concentration was 24% by weight, the polymerization conversion of the monomer mixture was 99% by weight, and the volume average particle size was 240 nm.

  While heating 1000 parts by weight of ion-exchanged water containing 5 parts by weight of calcium chloride to 40 ° C. and stirring, 100 parts by weight (solid content) of the multistage polymer particles (G-1) is gradually added and stirred. After heating up to 70 ° C., dehydration, washing with running water and drying were performed to obtain granules of multistage polymer particles (G-1). The refractive index of the multistage polymer particles (G-1) was 1.584, and the peroxide content was below the detection limit. The methyl ethyl ketone insoluble component had a weight fraction of 90.5% by weight and a refractive index of 1.591. The methyl ethyl ketone soluble component had a refractive index of 1.525 and a glass transition temperature of 75 ° C.

(Example 2) Production of multistage polymer particles (G-2) After adding 0.15 parts by weight of Rongalite to the latex of elastomer particles (R-1) of Production Example 1, 1.5 parts by weight of MMA, St A mixture of 13.5 parts by weight and 0.1 parts by weight of tBHP was continuously added over 2 hours. After 30 minutes, 0.05 part by weight of tBHP was added. After 30 minutes, 0.1 part by weight of Rongalite was added, and after-polymerization was further performed for 2 hours to obtain a latex of multistage polymer particles (G-2). It was. The solid content concentration was 23% by weight, the polymerization conversion of the monomer mixture was 97% by weight, and the volume average particle size was 235 nm.

  While maintaining 1000 parts by weight of ion-exchanged water containing 5 parts by weight of calcium chloride at 10 ° C. and stirring, 100 parts by weight (solid content) of the latex of the multistage polymer particles (G-2) is gradually added. After heating to 60 ° C., dehydration, washing with running water, and drying were performed to obtain granules of multistage polymer particles (G-2). The refractive index of the multistage polymer particles (G-2) was 1.593, and the peroxide content was below the detection limit. The weight fraction of the methyl ethyl ketone insoluble component was 92.7% by weight, the refractive index was 1.594, the refractive index of the methyl ethyl ketone soluble component was 1.573, and the glass transition temperature was 100 ° C.

(Example 3) Production of multistage polymer particles (G-3) After adding 0.15 parts by weight of Rongalite to the latex of elastomer particles (R-1) of Production Example 1, 15 parts by weight of St and t-butyl. Peroxy-2-ethylhexanoate 0.15 parts by weight of the mixture was continuously added over 2 hours. Further, post-polymerization was performed for 2 hours to obtain a latex of multistage polymer particles (G-3).

  The subsequent operations were the same as in Example 2. The multistage polymer had a refractive index of 1.594 and a peroxide content of 590 ppm. The methyl ethyl ketone insoluble component had a weight fraction of 93.5% by weight and a refractive index of 1.594. The methyl ethyl ketone soluble component had a refractive index of 1.592 and a glass transition temperature of 100 ° C.

(Examples 4 to 6) Production of Resin Composition As shown in Table 1, 4 parts by weight of the powders of the multistage polymer particles (G-1) to (G-3) prepared in Examples 1 to 3 were mixed with polycarbonate. (PC) resin (Sumitomo Dow Co., Ltd., trade name: Caliber 301-15) was blended with 100 parts by weight. The obtained blend was melt-kneaded at 260 ° C. with a twin screw extruder (TEX44SS manufactured by Nippon Steel Works, Ltd.) to produce pellets. The results of measuring the fluidity using the pellets are shown in Table 1.

  Using the obtained pellets, a test piece of 1/8 inch and 1/4 inch and a plate having a thickness of 75 mm × 50 mm × 2 mm were prepared with a FANUC 100B injection molding machine set at a cylinder temperature of 280 ° C. The impact resistance was evaluated using the test piece, and the optical characteristics (total light transmittance, haze ratio, yellowness) were measured using a plate.

(Comparative Example 1)
Samples were prepared and various measurements and evaluations were performed in the same manner as in Example 4 except that only the polycarbonate resin was used without using the multistage polymer particles (G-1) containing phenylthioethyl acrylate. The results are shown in Table 1. The refractive index measured using a plate having a thickness of 2 mm consisting only of the polycarbonate resin was 1.587.

(Comparative Example 2)
Instead of the multistage polymer particles (G-1) containing phenylthioethyl acrylate, the refractive index of the particle itself is 1.555, the refractive index of the methyl ethyl ketone insoluble component is 1.550, and the refractive index of the methyl ethyl ketone soluble component is 1. 591, methyl methacrylate-butadiene-styrene copolymer resin having a glass transition temperature of 98 ° C. (MBS-1, where the core content of butadiene-styrene is 81% by weight, and its glass transition temperature is −4 The sample was prepared in the same manner as in Example 4 except that the shell content of styrene-methyl methacrylate-4-hydroxybutyl acrylate copolymer was 19% by weight, and various measurements and evaluations were made. Carried out. The results are shown in Table 1.

(Comparative Example 3)
Instead of the multistage polymer particles (G-1) containing phenylthioethyl acrylate, the refractive index of the particle itself is 1.509, the refractive index of the methyl ethyl ketone insoluble component is 1.510, and the refractive index of the methyl ethyl ketone soluble component is 1. 487, butadiene-methyl methacrylate-butyl acrylate copolymer having a glass transition temperature of 81 ° C. (MBS-2, where the core content of butadiene polymer is 80% by weight, and its glass transition temperature is −77 ° C. A sample was prepared in the same manner as in Example 2 except that a resin containing a methyl methacrylate-butyl acrylate copolymer (shell content of 20% by weight) was used, and various measurements and evaluations were performed. The results are shown in Table 1.

  As seen in Table 1, Comparative Examples 1 and 2 are not sufficient in terms of impact resistance at 0 ° C. or higher, Comparative Example 2 has a high haze ratio and is translucent, and Comparative Example 3 has a very high haze ratio. While it was highly opaque, Example 1 had a haze ratio of 3% or less, was transparent, had a low yellowness, and had a good balance between optical properties and impact resistance. After the insertion molding with the hard coat and methacrylic resin film, it is considered suitable for transparent members such as household appliances and vehicle windows, and transparent members for protective equipment such as glasses and shields. Similarly, in Example 2, the haze ratio is 7.2% and the yellowness is low, and in Example 3, the haze ratio is 12%, indicating that the balance between optical properties and impact resistance is excellent.

(Example 7)
4 parts by weight of the powder of the multistage polymer particles (G-1) of Example 1 were added 0.016 parts by weight of sodium xylene sulfonate, 0.1 weight of polytetrafluoroethylene (Asahi Glass Co., Ltd., trade name: XG355). Parts, phosphorus antioxidant (manufactured by Adeka Corporation, trade name: PEP-36) 0.1 part by weight, carbon nanotube (manufactured by Nanocyl, NC7000) 0.95 part by weight, polycarbonate resin (manufactured by Idemitsu Kosan Co., Ltd.) , Trade name: Toughlon A2200) 100 parts by weight. The obtained blend was melt-kneaded at 260 ° C. with a twin-screw extruder (TEX44SS manufactured by Nippon Steel Works, Ltd.) to produce pellets.

  Using the obtained pellets, a 75 mm × 50 mm × 3 mm plate and a 127 mm × 12.7 mm × 3 mm combustion test bar were prepared on a FANUC 100B injection molding machine set at a cylinder temperature of 280 ° C. The result of evaluating the flame retardancy was V-0. A 1 kg iron weight was dropped from a height of 30 cm at 0 ° C. on the obtained plate, but no brittle breakage occurred.

  The appearance of the resulting plate has a jet-black feel and does not absorb much dust. After insertion with a silicone or methacrylic hard coat or methacrylic resin film, As a result, a molded article suitable as a member in a part requiring high designability for an electric product or an automobile interior was obtained.

(Comparative Example 4)
In Example 3, the same butadiene-methyl methacrylate-butyl acrylate copolymer resin (MBS-2) as used in Comparative Example 3 was used instead of the multistage polymer particles (G-1). A plate was prepared in the same manner as in Example 3. The appearance of the obtained plate is slightly blurred white, and dust may be adsorbed. Compared with the molded body of Example 3, it is considered to be a molded body that is not suitable for electric equipment and automobile interiors. It was.

(Comparative Example 5)
In Example 3, a plate was produced in the same manner as in Example 3 except that the multistage polymer particles (G-1) were not used. When a 1 kg iron weight was dropped from a height of 30 cm at 0 ° C. to the obtained plate, brittle breakage was observed.

(Example 8)
4 parts by weight of the powder of the multistage polymer particles (G-1) of Example 1 were added 0.018 parts by weight of potassium xylene sulfonate, 0.4 weight of polytetrafluoroethylene (manufactured by Asahi Glass Co., Ltd., trade name: XG355). Parts, phosphorus antioxidant (manufactured by Adeka Co., Ltd., trade name: PEP-36) 0.2 parts by weight, carbon nanotube (manufactured by Nanocyl, NC7000) 0.95 parts by weight, polycarbonate resin (manufactured by Teijin Chemicals Ltd.) , Trade name: Panlite L1225Y) 100 parts by weight. The obtained blend was melt-kneaded at 260 ° C. with a twin-screw extruder (TEX44SS manufactured by Nippon Steel Works, Ltd.) to produce pellets.

  Using the obtained pellets, a plate of 75 mm × 50 mm × 1.2 mm and a combustion test bar of 127 mm × 12.7 mm × 1.2 mm were prepared with a FANUC 100B injection molding machine set at a cylinder temperature of 300 ° C. The result of evaluating the flame retardancy was V-0. A spring hammer test (0.7 J) according to IEC 60068-2-75 was applied to the obtained three plates at 0 ° C., but no defect occurred in any of them.

  The appearance of the resulting plate is jet-black and does not absorb much dust. After insertion with a hard coat such as silicone or methacrylic resin or a methacrylic resin film, A molded article suitable as a member in a part requiring high designability such as a telephone / game machine housing was obtained.

(Comparative Example 6)
In Example 8, the same methyl methacrylate-butadiene-styrene copolymer resin (MBS-1) as used in Comparative Example 2 was used instead of the multistage polymer particles (G-1). A plate was prepared in the same manner as in Example 8. The appearance of the obtained plate was slightly blurred white, and dust may be adsorbed. Further, in the same spring hammer test as in Example 8, two out of three plates were found to be defective. Compared to the molded body, it was considered that the molded body was not suitable for a member such as a mobile phone / game machine housing where a high designability was required.

(Comparative Example 7)
In Example 8, a plate was produced in the same manner as in Example 8, except that the multistage polymer particles (G-1) were not used. As a result of applying the spring hammer test in the same manner as in Example 8 using the obtained plate, all the plates were brittlely cracked and lost.

Example 9
4 parts by weight of the powder of the multistage polymer particles (G-1) of Example 1 were mixed with 9 parts by weight of an aromatic condensed phosphate ester flame retardant (manufactured by Daihachi Chemical Industry Co., Ltd., trade name: PX-202), phosphorus It mix | blended with respect to 0.1 weight part of type | system | group antioxidant (Adeka Co., Ltd. brand name: PEP-36) and 100 weight part of polycarbonate resin (Teijin Chemicals Co., Ltd. brand name: Panlite L1225Z100). The obtained blend was melt-kneaded at 260 ° C. with a twin-screw extruder (TEX44SS manufactured by Nippon Steel Works, Ltd.) to produce pellets.

  Using the obtained pellets, a plate of 75 mm × 50 mm × 2 mm and a combustion test bar of 127 mm × 12.7 mm × 2 mm were prepared with a FANUC 100B injection molding machine set to a cylinder temperature of 300 ° C. The result of evaluating the flame retardancy was V-0. A spring hammer test (0.7 J) according to IEC 60068-2-75 was applied to the obtained three plates at 0 ° C., but no defect occurred in any of them. The plate had a total light transmittance of 88%, a haze ratio of 3.3%, and a yellowness of 4.9. A molded article suitable as a member of an LED lighting apparatus or the like was obtained.

(Comparative Example 8)
In Example 9, the same methyl methacrylate-butadiene-styrene copolymer resin (MBS-1) as used in Comparative Example 2 was used instead of the multistage polymer particles (G-1). A plate was prepared in the same manner as in 9. The total light transmittance was 80%, the haze rate was 72%, and the yellowness was 15. Compared with the molded body of Example 9, it was thought that the transparency was insufficient for use as a member of a lighting fixture or the like.

(Comparative Example 9)
In Example 9, a plate was prepared in the same manner as in Example 9 except that the multistage polymer particles (G-1) were not used. As a result of applying the spring hammer test in the same manner as in Example 9 using the obtained plates, all the plates were brittlely cracked and lost.

Claims (15)

A high refractive index elastomer A comprising a polymer site AC,
The high refractive index elastomer A is
It is obtained from a monomer based on (meth) acrylic acid ester AM of aromatic thioalkyl alcohol,
Its refractive index nA is 1.570 or more, and
The polymer portion AC is obtained from a monomer having AM as a main component,
Its refractive index nAC is 1.575 or more,
Insoluble in methyl ethyl ketone,
Its glass transition temperature is −10 ° C. or lower,
High refractive index elastomer A. The high refractive index elastomer A includes the polymer part AC and the polymer part AS,
The polymer part AS is
It is obtained from a monomer that does not contain AM as a main component,
The refractive index nAS is at least 0.005 lower than the refractive index nAC of the polymer portion AC, and includes a methyl ethyl ketone soluble component,
Its glass transition temperature is 11 ° C. or higher.
The high refractive index elastomer A according to claim 1. 100% by weight of the high refractive index elastomer A is
A multi-stage polymer comprising 70 to 95% by weight of the polymer part AC and 5 to 30% by weight of the polymer part AS polymerized in the presence of the polymer part AC;
The polymer part AS is
It is obtained from a monomer that does not contain AM as a main component,
The refractive index nAS is lower than the refractive index nAC of the polymer portion AC,
Contains methyl ethyl ketone soluble components, and
Its glass transition temperature is 11 ° C. or higher.
The high refractive index elastomer A according to claim 1.   The high refractive index elastomer A according to claim 1, wherein the AM has only one radical polymerizable group.   The high refractive index elastomer A according to claim 4, wherein the AM is phenylthioethyl acrylate.   The high refractive index elastomer A according to claim 3, wherein in the polymerization for forming the polymer part AS, a monomer polymerized in the final stage is mainly composed of methyl methacrylate.   The high refractive index elastomer A according to claim 2 or 3, wherein the polymer part AS is mainly composed of methyl methacrylate.   The high refractive index elastomer A according to any one of claims 1 to 7, wherein the low molecular peroxide content is 500 ppm or less. A high refractive index elastomer-containing resin composition comprising 100 parts by weight of resin B and 1 to 15 parts by weight of the high refractive index elastomer A1,
The resin B is at least one selected from the group consisting of a thermoplastic resin, a thermosetting resin, and an elastomer resin, the resin B forms a continuous phase, and the high refractive index elastomer A as a dispersed phase therein. The resin composition containing the high refractive index elastomer A according to any one of claims 1 to 8, wherein the refractive index nB of the resin B is lower than the refractive index nAC.   The resin composition containing A as a high refractive index elastomer according to claim 9, wherein a difference between the nA and nB is 0.01 or less.   The resin composition containing the high refractive index elastomer A according to claim 9 or 10, wherein the nB is 1.57 or more.   The resin containing a high refractive index elastomer A according to any one of claims 9 to 11, wherein the high refractive index elastomer A is uniformly dispersed in the resin B. Composition.   The high refractive index elastomer-containing resin composition according to claim 9, wherein the high refractive index elastomer A is dispersed in the resin B with a number average dispersed particle size of 0.07 to 5 μm. A resin composition containing an elastomer A.   The resin composition containing the high refractive index elastomer A according to claim 12, wherein the high refractive index elastomer A is molecularly compatible with the resin B. A molded article of a resin composition containing the high refractive index elastomer according to any one of claims 9 to 14, wherein the molded article has a haze ratio of 10% or less according to ASTM D1003.