Resin composition and resin molded body
A resin composition contains cellulose acylate (A), a polyester resin (B), at least one compound (C) selected from the group consisting of cardanol compounds and ester compounds having a molecular weight of about 250 or more and about 2000 less, and a water-absorbing compound (D).
1. A resin composition comprising:
cellulose acylate (A);
a polyester resin (B);
at least one compound (C) selected from the group consisting of cardanol compounds and ester compounds having a molecular weight of about 250 or more and about 2000 or less;
a water-absorbing compound (D); and
at least one polymer (E) that is core-shell structure polymers having a core layer and a shell layer formed on a surface of the core layer and containing a polymer of an alkyl (meth)acrylate.
2. The resin composition according to claim 1 , further comprising a poly(meth)acrylate compound (F) including about 50 mass % or more of a structural unit derived from an alkyl (meth)acrylate.
3. The resin composition according to claim 1 , wherein the cellulose acylate (A) is at least one selected from cellulose acetate propionate (CAP) and cellulose acetate butyrate (CAB).
4. The resin composition according to claim 1 , wherein the polyester resin (B) is a polyhydroxyalkanoate.
5. The resin composition according to claim 4 , wherein the polyester resin (B) is polylactic acid.
6. The resin composition according to claim 1 , wherein the compound (C) is a fatty acid ester compound.
7. The resin composition according to claim 6 , wherein the compound (C) is an adipic acid ester-containing compound.
8. The resin composition according to claim 1 , wherein the compound (C) is a cardanol compound.
9. The resin composition according to claim 1 , wherein a percentage of water absorption of the water-absorbing compound (D) is about 50 mass % or more.
10. The resin composition according to claim 1 , wherein the water-absorbing compound (D) has at least one structure selected from the group consisting of a polyvinylpolypyrrolidone structure, a polyacrylic acid salt structure, a polyvinyl butyral structure, and an isobutylene-maleic anhydride copolymer structure.
11. The resin composition according to claim 1 , wherein a mass ratio (B/A) of the polyester resin (B) to the cellulose acylate (A) is about 0.03 or more and about 0.5 or less.
12. The resin composition according to claim 1 , wherein a mass ratio (C/A) of the compound (C) to the cellulose acylate (A) is about 0.02 or more and about 0.5 or less.
13. The resin composition according to claim 1 , wherein a mass ratio (D/A) of the water-absorbing compound (D) to the cellulose acylate (A) is about 0.001 or more and about 0.2 or less.
14. A resin molded body comprising the resin composition according to claim 1 .
15. The resin molded body according to claim 14 that is an injection-molded body.