US9728294B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9728294-B2 |
| Application number | US-201113701768-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 7, 2011 |
| Priority date | Jun 7, 2010 |
| Publication date | Aug 8, 2017 |
| Grant date | Aug 8, 2017 |
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A resin composite material includes: fine graphite particles including plate-like graphite particles, an aromatic vinyl copolymer which is adsorbed on the plate-like graphite particles, and which contains a vinyl aromatic monomer unit represented by the following formula (1): —(CH 2 —CHX)— (1) (in the formula (1), X represents a phenyl group, a naphthyl group, an anthracenyl group, or a pyrenyl group, provided that these groups may have each a substituent), and at least one hydrocarbon chain which is bonded to the aromatic vinyl copolymer, and which is selected from the group consisting of alkyl chains, oligoolefin chains, and polyolefin chains.
Opening claim text (preview).
The invention claimed is: 1. A resin composite material comprising: fine graphite particles comprising plate-like graphite particles, wherein the plate-like graphite particles have a functional group selected from the group consisting of a hydroxyl group, a carboxyl group, and an epoxy group only on a surface thereof and in a region from the surface to a depth of 10 nm; an aromatic vinyl copolymer which is adsorbed on the plate-like graphite particles, and which contains a vinyl aromatic monomer unit represented by the following formula (1): —(CH 2 —CHX)— (1) in the formula (1), X represents a phenyl group, a naphthyl group, an anthracenyl group, or a pyrenyl group, provided that these groups may have each a substituent, and at least one hydrocarbon chain which is bonded to the aromatic vinyl copolymer, and which is selected from the group consisting of alkyl chains, oligoolefin chains, and polyolefin chains, wherein the fine graphite particles are produced by mixing raw material graphite particles, the aromatic vinyl copolymer, a peroxyhydrate, and a solvent, subjecting the obtained mixture to a grinding treatment, introducing the hydrocarbon chain into the aromatic vinyl copolymer, and then removing the solvent; and an olefin-based resin. 2. The resin composite material according to claim 1 , wherein the fine graphite particles are present in the olefin-based resin in a dispersed state. 3. The resin composite material according to claim 1 , wherein the aromatic vinyl copolymer has a functional group, and the hydrocarbon chain is formed by bonding between the functional group of the aromatic vinyl copolymer and at least one selected from alkyl compounds, oligoolefins, and polyolefins which each have a moiety reactive with the functional group of the aromatic vinyl copolymer. 4. The resin composite material according to claim 3 , wherein the aromatic vinyl copolymer comprises the vinyl aromatic monomer unit and another monomer unit derived from at least one monomer selected from the group consisting of (meth)acrylic acid, (meth)acrylates, (meth)acrylamides, vinylimidazoles, and vinylpyridines. 5. The resin composite material according to claim 3 , wherein the functional group of the aromatic vinyl copolymer is an amino group. 6. The resin composite material according to claim 3 , wherein the moiety reactive with the functional group of the aromatic vinyl copolymer is at least one selected from the group consisting of a chlorine atom, a carboxyl group, and a carboxylic anhydride group. 7. A resin composite material comprising: fine graphite particles comprising plate-like graphite particles, wherein the plate-like graphite particles have a functional group selected from the group consisting of a hydroxyl group, a carboxyl group, and an epoxy group only on a surface thereof and in a region from the surface to a depth of 10 nm; and an aromatic vinyl copolymer which is adsorbed on the plate-like graphite particles, and which contains a vinyl aromatic monomer unit represented by the following formula (1): —(CH 2 —CHX)— (1) in the formula (1), X represents a phenyl group, a naphthyl group, an anthracenyl group, or a pyrenyl group, provided that these groups may have each a substituent, wherein the fine graphite particles are produced by mixing raw material graphite particles, the aromatic vinyl copolymer, peroxyhydrate, and a solvent, subjecting the obtained mixture to a grinding treatment, and then removing the solvent; and at least one aromatic polymer selected from the group consisting of polystyrenes and polyphenylene ethers. 8. The resin composite material according to claim 7 , wherein the aromatic polymer is a mixture of a polystyrene and a polyphenylene ether, and an amount of the polystyrene in the mixture is 20 to 80% by mass. 9. The resin composite material according to claim 7 , wherein the aromatic vinyl copolymer comprises the vinyl aromatic monomer unit and a polar monomer unit. 10. The resin composite material according to claim 9 , wherein the polar monomer unit is a monomer unit derived from at least one monomer selected from the group consisting of (meth)acrylic acid, (meth)acrylates, (meth)acrylamides, vinylpyridines, maleic anhydride, maleimides, and vinylimidazoles. 11. The resin composite material according to claim 7 , wherein a storage elastic modulus at 40° C. is 2 GPa or higher. 12. The resin composite material according to claim 7 , wherein a surface electrical resistance per unit length is 10 4 Ω/cm or lower. 13. The resin composite material according to claim 7 , wherein an amount of the fine graphite particles is 0.1 to 80% by mass. 14. The resin composite material according to claim 2 , wherein the aromatic vinyl copolymer has a functional group, and the hydrocarbon chain is formed by bonding between the functional group of the aromatic vinyl copolymer and at least one selected from alkyl compounds, oligoolefins, and polyolefins which each have a moiety reactive with the functional group of the aromatic vinyl copolymer. 15. The resin composite material according to claim 14 , wherein the aromatic vinyl copolymer comprises the vinyl aromatic monomer unit and another monomer unit derived from at least one monomer selected from the group consisting of (meth)acrylic acid, (meth)acrylates, (meth)acrylamides, vinylimidazoles, and vinylpyridines. 16. The resin composite material according to claim 14 , wherein the functional group of the aromatic vinyl copolymer is an amino group. 17. The resin composite material according to claim 14 , wherein the moiety reactive with the functional group of the aromatic vinyl copolymer is at least one selected from the group consisting of a chlorine atom, a carboxyl group, and a carboxylic anhydride group. 18. The resin composite material according to claim 8 , wherein the aromatic vinyl copolymer comprises the vinyl aromatic monomer unit and a polar monomer unit. 19. The resin composite material according to claim 18 , wherein the polar monomer unit is a monomer unit derived from at least one monomer selected from the group consisting of (meth)acrylic acid, (meth)acrylates, (meth)acrylamides, vinylpyridines, maleic anhydride, maleimides, and vinylimidazoles.
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