JP5186708B2 - Resin composition and molded article, film or coating agent comprising resin composition - Google Patents

Description

The present invention is excellent in dispersibility in the transparent polymer resin composition and a resin composition transparent composition having excellent transparency and optical properties dispersed with inorganic fine particles obtained in transparency in the polymer It relates to a molded article, a film or a coating agent.

Conventionally, the refractive index of transparent polymers has been increased by introducing aromatic compounds such as sulfur, halogen atoms or benzene rings into the polymer. However, there is a limit to improving the refractive index,
In addition, optical characteristics such as moisture absorption, refractive index temperature dependency, and birefringence may be deteriorated. In recent years, attempts have been actively made to disperse fine particles in a transparent polymer as a technique capable of increasing the refractive index while imparting various optical characteristics.

In order to achieve transparency, it is easiest to mix fine particles and transparent polymers having similar refractive indexes, and in this case, the size and dispersibility of the fine particles are not a problem.
However, when increasing the refractive index by dispersing fine particles having a high refractive index in a transparent polymer having a lower refractive index, it is necessary to give sufficient consideration to the particle size and dispersibility of the fine particles.

  In general, it is expected that excellent transparency is realized only when fine particles sufficiently smaller than the wavelength of light are dispersed completely independently. However, in practice, when the fine particles are dispersed in the polymer, the size of the fine particles is small. Particularly when the particle size is 100 nm or less, aggregation easily occurs and the transparency of the composition is lowered.

  In addition, with regard to fine particles of metal oxides such as titanium, which are expected to have a high refractive index, the cohesive force is large. This technology has not been developed yet.

  As a method for dispersing fine particles in a polymer, Patent Document 1 and Non-Patent Document 1 introduce a functional group on the surface of the fine particle when synthesizing the fine particle and combine it with a polymer having a functional group that reacts with the functional group. The method of aiming at dispersion | distribution of microparticles | fine-particles by this is mentioned.

However, these methods require molecules having two or more types of functional groups for fine particle synthesis, and a functional group that reacts with the functional groups must be introduced into the polymer in which the fine particles are dispersed. There are many restrictions.
Japanese Patent Laid-Open No. 11-043556 Changli. Lu et al., “Journal of Materials Chemistry” (USA), Vol. 13, 2003, p. 2189-2195

In addition to this, Patent Document 2 discloses a method using a polymer coupling agent in order to disperse inorganic fine particles in an organic solvent.
However, when the particles are modified with only the polymer, the weight of the fine particles in the transparent composition obtained by dispersing in the transparent polymer may be relatively reduced.
JP 05-269365 A

  For example, in order to achieve a high refractive index, it is necessary to sufficiently increase the filling amount of the fine particles with respect to the transparent polymer. In Non-Patent Document 1, a composition having a refractive index of 1.75 or more is obtained by adding 80% or more by weight of zinc sulfide having a refractive index of 2.36 to a polyurethane methacrylate macromer having a refractive index of 1.645.

  Thus, in order to increase the refractive index, it is indispensable not only to disperse the fine particles in the transparent polymer but also to have a high filling, and it has sufficient dispersibility to obtain transparency with a small amount of modifier. Development of a fine particle modification method is expected.

  In addition to the refractive index, a composition in which inorganic fine particles are dispersed in a polymer can be expected to have optical properties such as wavelength dispersion characteristic of a metal oxide that are significantly different from those of conventional transparent polymers.

The object of the present invention is to disperse in a transparent polymer to obtain a transparent composition having excellent transparency, a high refractive index, and a transparent composition having excellent optical properties. The present invention provides a resin composition using a child and a molded article, film or coating agent comprising the resin composition.

  The inventors of the present invention have intensively studied a technique for dispersing inorganic fine particles in a transparent polymer without agglomerating and making the fine particles highly packed in the transparent polymer. It has been found that when fine particles are modified with both polymers, the fine particles are highly filled without forming large aggregates in the transparent polymer, and a composition having excellent transparency can be obtained.

The present invention relates to a transparent composition (D) in which inorganic fine particles (A) are modified with an organic substance (B) and dispersed in a transparent polymer (C), of which (A) to (C) (A) The inorganic fine particles are oxides containing one or more selected from titanium, zirconium, zinc, and aluminum, the inorganic fine particles having a particle diameter of 1 to 50 nm, and (B) the organic substance has a molecular weight. Polymers (c) and (C) which form a main skeleton by living radical polymerization starting from a modified molecule (a) less than 1000 and an initiator (b) introduced on the surface of inorganic fine particles are acrylic resins. , Phenoxy resin, polystyrene, polycarbonate, polycycloolefin, natural rubber, polyisoprene, poly-1,2-butadiene, polyisobutene, polybutene, poly-2-heptyl-1,3 Butadiene, poly-2-t-butyl-1,3-butadiene, poly-1,3-butadiene, polyoxyethylene, polyoxypropylene, polyvinyl ethyl ether, polyvinyl hexyl ether, polyvinyl butyl ether, polyvinyl acetate, polyvinyl propionate , Polyurethane, ethyl cellulose, polyvinyl chloride, polyacrylonitrile, polymethacrylonitrile, polysulfone, polysulfide, ethylene vinyl acetate copolymer, ethylene-vinyl acetate copolymer modified product, polyethylene, ethylene-propylene copolymer, ethylene-acrylic Acid copolymer, ethylene-acrylate copolymer, ethylene-acrylate copolymer, acrylate rubber, polyisobutylene, atactic polypropylene, polyvinyl Is at least one selected from tyral, acrylonitrile-butadiene copolymer, styrene-butadiene block copolymer, styrene-isoprene block copolymer, ethylene cellulose, polyamide, silicone rubber, polychloroprene, silicone, polyvinyl ether, The modified molecule (a) having a molecular weight of less than 1000 of the organic substance (B) is at least one selected from salts, phosphine oxides, acyl compounds, esters, phosphines, amine compounds or pyridines, and the organic substance (B) The functional group that reacts with and binds to the hydroxyl group present on the surface of the inorganic fine particles of the initiator (b) is phosphoric acid, carboxylic acid, acid halide, acid anhydride, isocyanate, glycidyl group, chlorosilane group, alkoxysilane group One or more types selected from And it is related with the resin composition whose haze when the said transparent composition (D) is formed in a thin film with a film thickness of 100-1000 nm on a transparent substrate is 1% or less by the measurement with a turbidimeter .
Moreover, this invention relates to the said resin composition whose initiator (b) of the said organic substance (B) is 2-bromopropionic acid.

  In the present invention, when the transparent composition (D) forms a thin film having a thickness of 100 to 1000 nm on a silicon wafer, the refractive index is 1.60 or more as measured by an ellipsometer at a wavelength of 400 to 800 nm. 0.0 or less and the Abbe number is 40 or less.

The present invention also relates to the resin composition, wherein the living radical polymerization of the polymer (c) of the organic substance (B) is atom transfer radical polymerization .
Also, the present invention relates to a transparent composition (D) said resin composition is 30 to 95% resulting residue is weight before pyrolysis decomposes 600 ° for 30 minutes heat Celsius under a nitrogen atmosphere.

Et al is, the present invention provides a molded article comprising the resin composition, a film or a coating agent.

The inorganic fine particles used in the present invention give a resin composition excellent in transparency even when highly filled in a transparent polymer, and have an advantage that the refractive index of the transparent resin composition can be controlled and wavelength dispersion is extremely large. And it is suitable as a molded article, a film or a coating agent comprising this resin composition.

The present invention will be described in detail below.
In the present invention, the inorganic fine particles preferably have a higher refractive index than the transparent polymer for optical use, and specifically, an oxide containing one or more selected from titanium, zirconium, zinc, and aluminum. Yes, the shape of the particles does not matter. Examples thereof include those that form a crystal structure with one or more components selected from these, or core-shell structures in which one inorganic fine particle is coated with one or more other inorganic substances.

  The particle diameter of the inorganic fine particles is preferably 1 nm to 50 nm in average particle diameter. In particular, when the optical path length in the transparent composition is increased, the thickness is preferably 1 nm or more and 20 nm or less in order to achieve higher transparency. The average particle size is determined by observation with a transmission electron microscope (TEM).

Since the particle shape includes a spherical shape, a rod shape, an indeterminate shape, and the like, the diameter of a circle having the same area as the area of the observed particle image is defined as the particle diameter. Using this particle diameter, the average particle diameter is calculated by a known statistical process. The particle diameter is determined from at least 100 particles selected at random, and used for the statistical process.

  The method for producing the inorganic fine particles is not particularly limited, but a method capable of obtaining particles having good crystallinity is preferable in order to achieve a high refractive index. Specific examples include a solid phase method such as a pulverization method, a gas phase method such as a gas phase reaction method, a colloidal method, a uniform precipitation method, a hydrothermal synthesis method, a microemulsion method, and a liquid phase method such as a hot soap method.

  The state after the production of the inorganic fine particles may be in a powdered solid state or a solvent dispersed state, but it is necessary to prevent the irreversible aggregation of the inorganic fine particles after modification. Therefore, the most effective method is a method in which inorganic fine particles are covered with a modifying molecule having a molecular weight of 1000 or less and the surfaces of the fine particles are not brought into direct contact with each other.

  There are various ways to modify a modifying molecule. One is that hydroxyl groups present on the surface of inorganic fine particles cause chemical reactions with various functional groups to form bonds, and this chemical reaction is used to modify compounds having functional groups on the surface of the fine particles. It is possible.

  In addition, when a molecule having a functional group that has a weak attractive interaction with a charge or hydrogen bond on the particle surface is used, the surface of the fine particle can be modified with this modifying molecule. These two are effective modification methods, and each can be used alone or simultaneously.

  Although these methods can prevent irreversible aggregation of the particles themselves, if inorganic fine particles modified only by this method are dispersed in a transparent polymer, the compatibility with the resin is limited. Agglomerates. Therefore, especially when the fine particles are highly filled, the transparency is remarkably lowered.

  In the present invention, by using both a modifying molecule for preventing aggregation and a high molecular weight modifying molecule for improving compatibility with the resin, high packing and uniform dispersion of inorganic fine particles can be achieved. A transparent composition is obtained.

  The modifying molecule (a) of the present invention is not particularly limited as long as it is a functional group that has an attractive interaction with the particle surface. Specifically, sulfonate, carboxylate, phosphate, phosphite , Nitrates, nitrites, ammonium salts, etc .; phosphine oxides such as triphenylphosphine oxide, trioctylphosphine oxide, tributylphosphine oxide; acyl compounds; esters; triphenylphosphine, trioctylphosphine, tributyl Phosphine and other phosphines; trioctylamine, tributylamine, triethylamine, octylamine, decylamine, undecylamine, dodecylamine, tridecylamine, tetradecylamine, pentadecylamine, hexadecylamine, heptadecylamine, octadecylamine Emissions, octyl aniline, decyl aniline, undecyl aniline, dodecyl aniline, tridecyl aniline, tetradecyl aniline, pentadecyl aniline, hexadecyl aniline, heptadecyl aniline include amine compounds or pyridine such as octadecyl aniline. Since these functional groups interact weakly, the fine particles may be dissociated from the fine particles when dispersed in an organic solvent or heated. Therefore, it is possible to introduce the initiator (b) to the particle surface.

  The functional group of the initiator (b) of the present invention is not particularly limited as long as it reacts with the hydroxyl group on the surface of the fine particles to form a bond. Specifically, phosphoric acid, carboxylic acid, acid halide, An acid anhydride, an isocyanate, a glycidyl group, a chlorosilane group, and an alkoxysilane group are mentioned. Since these functional groups form chemical bonds on the surface of the fine particles, it is difficult to dissociate them once they are modified.

  The modified polymer (c) of the present invention is a polymer chain that is elongated from the starting point introduced on the surface of the inorganic fine particles by atom transfer radical polymerization. Therefore, the modified polymer is firmly bonded to the surface of the inorganic fine particle through a chemical bond. In addition, the amount of polymer polymerization can be precisely controlled by atom transfer radical polymerization.

  The modified polymer (c) is not particularly limited as long as it is a polymer compatible with the transparent polymer (C). The term "compatible" refers to a method in which both polymers are directly mixed or kneaded, and the mixture after mixing by a method in which the polymer is once dissolved and then mixed and the solvent is distilled off has excellent transparency. That is.

  The polymer chain includes a linear type and a branched type, but the polymer chain used in the present invention is not particularly limited. The polymer chain may be formed by polymerizing the same monomer or polymerizing two or more different monomers. However, in order to disperse fine particles well in the transparent polymer, the weight average molecular weight is preferably 1,000 to 1,000,000.

  The ratio of the modified polymer to the modified molecule applied to the inorganic fine particles of the present invention is not particularly limited as long as the fine particles are dispersed in the transparent polymer. However, in order to highly fill the inorganic fine particles in the transparent polymer, the modified molecules In contrast, it is preferable that the amount of the modified polymer is as small as possible. Specifically, it is desirable that the molar ratio is 1: 0.1 to 1: 10000.

  The transparent polymer (C) of the present invention is not limited as long as it is used for optical applications and has excellent transparency. Specifically, acrylic resin, phenoxy resin, polystyrene, polycarbonate, polycycloolefin, natural rubber, poly Such as isoprene, poly-1,2-butadiene, polyisobutene, polybutene, poly-2-heptyl-1,3-butadiene, poly-2-t-butyl-1,3-butadiene, poly-1,3-butadiene, etc. Di) enes, polyoxyethylene, polyoxypropylene, polyvinyl ethyl ether, polyvinyl hexyl ether, polyvinyl butyl ether, and other polyethers, polyvinyl acetate, polyesters such as polyvinyl propionate, polyurethane, ethyl cellulose, polyvinyl chloride, poly Acrylonitrile, polymeta Rironitoriru, polysulfone, polysulfide, and the like.

  In addition, ethylene vinyl acetate copolymer, modified ethylene-vinyl acetate copolymer, polyethylene, ethylene-propylene copolymer, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer, ethylene-acrylic Acid salt copolymer, acrylic ester rubber, polyisobutylene, atactic polypropylene, polyvinyl butyral, acrylonitrile-butadiene copolymer, styrene-butadiene block copolymer, styrene-isoprene block copolymer, ethylene cellulose, polyamide, Synthetic rubbers such as silicone rubber and polychloroprene, silicone, polyvinyl ether and the like are applicable, and are used alone or in combination of two or more.

Furthermore, after functional groups are introduced into these polymers and complexed with inorganic fine particles, a reaction between the functional groups of the polymers is caused to form a network of the polymers. Further, the term “transparent” means that it can be used for optical applications, and it means that there is no absorption at a wavelength of 400 to 800 nm and the haze is 1% or less.

  There is no restriction | limiting in particular in the manufacturing method of transparent composition (D). Specific examples include a melt-kneading method and a method in which inorganic fine particles are dispersed in a solvent, while a polymer is dissolved in the solvent, and the solvent is removed after both are mixed in solution.

  The production method is not particularly limited with respect to the resin composition of inorganic fine particles and transparent resin. However, specifically, in addition to the two methods described above, there is a method in which a resin is formed by dispersing in a monomer and curing the monomer with heat or light. From these methods, molded articles, films and coating agents are obtained.

  As a simple method for evaluating optical characteristics, there is a method in which modified inorganic fine particles and transparent polymer are dispersed or dissolved in a solvent and spin-cast on a substrate. Evaluation of the refractive index of the transparent composition was performed by preparing a sample for evaluation of a thin film having a film thickness of 100 to 1000 nm using a silicon wafer as a substrate, and having a refractive index value by an ellipsometer of 1.6 or more at a wavelength of 400 to 800 nm. It is preferable that it is 3.0 or less. The Abbe number is preferably 40 or less.

  Although there is no restriction | limiting in particular in content in the composition of an inorganic fine particle, In order to raise the refractive index of a transparent polymer, it is preferable that the ratio of the inorganic substance with respect to a composition is 30 to 95%. In order to further increase the refractive index, it is preferably 40 to 95%. The content of the inorganic fine particles in the composition can be accurately measured by a residue obtained by thermal decomposition at 600 ° C. for 30 minutes in a nitrogen atmosphere.

  In order to confirm the transparency of the composition, a sample for evaluation of a thin film having a film thickness of 100 to 1000 nm is prepared on a substrate using a transparent material such as a slide glass, and a haze measurement value by a haze meter is 1% or less. Is preferred.

EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example, this invention is not restrict | limited to the following Example.
[Synthesis Example 1 of Titanium Oxide Fine Particles]
Trioctylphosphine 1 in a 100 ml three-necked flask equipped with a thermometer and a reflux condenser
2.0 g (manufactured by Aldrich) and 2.8 g of titanium tetrachloride (manufactured by Wako Pure Chemical Industries, Ltd.) were added, and the mixture was heated to 250 degrees Celsius with stirring under a nitrogen atmosphere. After reaching 250 ° C., 4.3 g of tetraisopropoxy titanium (manufactured by Wako Pure Chemical Industries, Ltd.) was added. After stirring for 20 minutes as it was, the mixture was allowed to cool and a precipitate was deposited. 2. Incline, remove the supernatant and wash the precipitate twice with acetone.
13 g of titanium oxide fine particles were obtained.

[Synthesis Example 1 of Introducing Initiator to Titanium Oxide Fine Particle Surface]
Titanium oxide fine particles 2.55 g of titanium oxide fine particles of Synthesis Example 1 were weighed into a 50 ml two-necked flask equipped with a reflux condenser, xylene 16 ml (manufactured by Wako Pure Chemical Industries), and 2-bromopropionic acid 2.44 g (Wako Pure Chemical Industries, Ltd.). Made). Heated under a nitrogen atmosphere and refluxed for 1 hour. After heating, the mixture was allowed to cool to room temperature, and the contents were added dropwise to 40 ml of acetone, resulting in the formation of a precipitate. The precipitate was washed with acetone to obtain 2.42 g of initiator-introduced titanium oxide fine particles.

[Polymer modification treatment example 1]
Introducing initiator onto the surface of titanium oxide fine particles 450 mg of the initiator-introduced titanium oxide of Example 1 and 45 mg of copper (I) bromide (Aldrich) were weighed into a 50 ml two-necked eggplant flask and 3 ml of styrene monomer (Wako Pure Chemical Industries, Ltd.) Kogyo) was added, and dissolved oxygen was removed by argon bubbling. After stirring at 110 ° C. for 1 hour under stirring in an argon atmosphere, the mixture was allowed to cool, returned to room temperature, and the contents were dropped into 10 ml of methanol, resulting in precipitation. The precipitate was washed with methanol to obtain PS-modified titanium oxide fine particle solids.

[Polymer modification treatment example 2]
Introducing initiator onto the surface of titanium oxide fine particles 450 mg of the initiator-introduced titanium oxide of Example 1 and 45 mg of copper (I) bromide (Aldrich) were weighed into a 50 ml two-necked eggplant flask and 3 ml of styrene monomer (Wako Pure Chemical Industries, Ltd.) Kogyo) was added, and dissolved oxygen was removed by argon bubbling. After stirring at 110 ° C. for 3 hours under stirring in an argon atmosphere, the mixture was allowed to cool, returned to room temperature, and the contents were dropped into 10 ml of methanol, resulting in precipitation. The precipitate was washed with methanol to obtain PS-modified titanium oxide fine particle solids.

[Polymer modification treatment example 3]
Introducing initiator onto the surface of titanium oxide fine particles 450 mg of the initiator-introduced titanium oxide of Example 1 and 45 mg of copper (I) bromide (Aldrich) were weighed into a 50 ml two-necked eggplant flask and 3 ml of styrene monomer (Wako Pure Chemical Industries, Ltd.) Kogyo) was added, and dissolved oxygen was removed by argon bubbling. After stirring at 110 ° C. for 5 hours under stirring in an argon atmosphere, the mixture was allowed to cool, returned to room temperature, and the contents were dropped into 10 ml of methanol, resulting in precipitation. The precipitate was washed with methanol to obtain PS-modified titanium oxide fine particle solids.

Comparative Example 1
[Transparent composition production example 1]
Toluene was added to and dispersed in the titanium oxide fine particles of the titanium oxide fine particle synthesis example 1 to prepare a toluene dispersion of nanoparticles. Furthermore, polystyrene (PS, manufactured by Alpha Aether, molecular weight = 100000) was dissolved in toluene to prepare a PS toluene solution. A liquid was prepared by mixing a predetermined amount of both, and the liquid was spin-coated on a slide glass or a silicon wafer to prepare a transparent composition.

Example 1
[Transparent composition preparation example 2]
The PS-modified titanium oxide fine particles of Polymer Modification Example 1 were dispersed in toluene to prepare a toluene dispersion of PS-modified titanium oxide fine particles. Furthermore, polystyrene was dissolved in toluene to prepare a PS toluene solution. A liquid was prepared by mixing a predetermined amount of both, and the liquid was spin-coated on a slide glass or a silicon wafer to prepare a transparent composition.

Example 2
[Transparent composition preparation example 3]
The PS-modified titanium oxide fine particles of Polymer Modification Example 2 were dispersed in toluene to prepare a toluene dispersion of PS-modified titanium oxide fine particles. Furthermore, polystyrene was dissolved in toluene to prepare a PS toluene solution. A liquid was prepared by mixing a predetermined amount of both, and the liquid was spin-coated on a slide glass or a silicon wafer to prepare a transparent composition.

Example 3
[Transparent composition preparation example 4]
The PS-modified titanium oxide fine particles of Polymer Modification Example 3 were dispersed in toluene to prepare a toluene dispersion of PS-modified titanium oxide fine particles. Furthermore, polystyrene was dissolved in toluene to prepare a PS toluene solution. A liquid was prepared by mixing a predetermined amount of both, and the liquid was spin-coated on a slide glass or a silicon wafer to prepare a transparent composition.

The transparent composition was evaluated as follows.
[1] Weight ratio analysis About the transparent composition produced in Examples 1-3, the weight ratio of the inorganic substance in a transparent composition was evaluated by TG / DTA6300 (made by SS nanotechnology). The results are shown in FIGS.

[2] Haze The haze was investigated with the haze meter NDH2000 (made by Nippon Denshoku Industries) about the transparent composition of the comparative example 1 and Examples 1-3. The result is shown in FIG.

[3] Refractive Index The transparent compositions prepared in Examples 1 to 3 were measured for refractive index at a wavelength of 633 nm using an automatic ellipsometer DVA-36LA (manufactured by Mizojiri Optical Industry). The measured values are shown in FIG.

The inorganic fine particles of the present invention are inorganic fine particles having a high refractive index modified with a modifying molecule or a modified polymer. When dispersed in a transparent polymer, the refractive index can be arbitrarily adjusted while having excellent transparency. In addition, a large wavelength dispersion can be provided. Therefore, it can be used as a hard coating material for optical materials, for example, lenses for cameras and glasses, pickup lenses for optical recording / reproducing equipment, and film lenses. It can also be used for an antireflection layer of a liquid crystal display, an EL display, and a CRT display, and a brightness enhancement layer of an EL display.
In particular, since a transparent composition in which titanium oxide is dispersed has a characteristic of large wavelength dispersion, it can be applied to applications that could not be applied to optically transparent polymers at present.

It is a graph which shows the relationship between a haze and an inorganic substance weight ratio. It is a graph which shows the relationship between a refractive index and an inorganic substance weight ratio.

Claims (6)

Inorganic fine particles (A) is surface modified with an organic substance (B), a transparent polymer dispersed transparent composition (C) (D), these (A) ~ (C) is, ( A) An inorganic fine particle is an oxide containing one or more selected from titanium, zirconium, zinc, and aluminum, and has a particle diameter of 1 to 50 nm,
(B) Polymers (c) and (C) in which the organic substance forms a main skeleton by living radical polymerization starting from the modified molecule (a) having a molecular weight of less than 1000 and the initiator (b) introduced on the surface of the inorganic fine particles ) Transparent polymer is acrylic resin, phenoxy resin, polystyrene, polycarbonate, polycycloolefin, natural rubber, polyisoprene, poly-1,2-butadiene, polyisobutene, polybutene, poly-2-heptyl-1,3-butadiene, Poly-2-t-butyl-1,3-butadiene, poly-1,3-butadiene, polyoxyethylene, polyoxypropylene, polyvinyl ethyl ether, polyvinyl hexyl ether, polyvinyl butyl ether, polyvinyl acetate, polyvinyl propionate, polyurethane , Ethyl cellulose, poly Vinyl chloride, polyacrylonitrile, polymethacrylonitrile, polysulfone, polysulfide, ethylene vinyl acetate copolymer, modified ethylene-vinyl acetate copolymer, polyethylene, ethylene-propylene copolymer, ethylene-acrylic acid copolymer, ethylene -Acrylate ester copolymer, ethylene-acrylate copolymer, acrylic ester rubber, polyisobutylene, atactic polypropylene, polyvinyl butyral, acrylonitrile-butadiene copolymer, styrene-butadiene block copolymer, styrene- It is at least one selected from isoprene block copolymer, ethylene cellulose, polyamide, silicone rubber, polychloroprene, silicone, polyvinyl ether, and the molecular weight of the organic substance (B) is 10 The modified molecule (a) which is less than 0 is at least one selected from salts, phosphine oxides, acyl compounds, esters, phosphines, amine compounds or pyridines, and the organic substance (B) initiator (b) has The functional group that reacts with and binds to the hydroxyl group present on the surface of the inorganic fine particle is at least one selected from phosphoric acid, carboxylic acid, acid halide, acid anhydride, isocyanate, glycidyl group, chlorosilane group, and alkoxysilane group. And the resin composition whose haze when the said transparent composition (D) is formed in a thin film with a film thickness of 100-1000 nm on a transparent substrate is 1% or less by the measurement with a turbidimeter. The resin composition of Claim 1 whose initiator (b) of the said organic substance (B) is 2-bromopropionic acid. When the transparent composition (D) forms a thin film having a thickness of 100 to 1000 nm on a silicon wafer, the refractive index is 1.60 to 3.0 and the Abbe number is measured by an ellipsometer at a wavelength of 400 to 800 nm. The resin composition according to claim 1 or 2 , wherein is 40 or less. The resin composition according to any one of claims 1 to 3 , wherein the living radical polymerization of the polymer (c) of the organic substance (B) is atom transfer radical polymerization. Transparent composition (D) is a resin composition according to any one of claims 1-4 residue obtained by decomposing 600 degrees 30 minutes heat Celsius under a nitrogen atmosphere is 30 to 95% of the weight before pyrolysis . A molded article, film or coating agent comprising the resin composition according to any one of claims 1 to 5 .

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