Resin composition and resin molded article

1. A resin composition comprising:

cellulose acrylate (A), wherein the degree of substitution of the cellulose acrylate (A) is 2.1 to 2.9;

at least a polymer (B) selected from the group consisting of:

a polymer (b1) having a core-shell structure including:

a core layer containing a butadiene polymer, and

a shell layer located on a surface of the core layer and containing a polymer selected from a styrene polymer and an acrylonitrile-styrene polymer;

a styrene-ethylene-butadiene-styrene copolymer (b2);

polyurethane (b3); and

aromatic polyester (b4); and

a plasticizer (C), wherein the plasticizer is at least one selected from a group consisting of a cardanol compound, dicarboxylic acid diester, citrate, a polyether compound having one or more unsaturated bonds, a polyether ester compound, glycol benzoate, a compound represented by the following General Formulae (6) and epoxidized fatty acid ester:

wherein, in the General Formula (6),

R 61 represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms, and

R 62 represents an aliphatic hydrocarbon group having 1 to 8 carbon atoms;

wherein the cellulose acrylate (A) is at least one selected from a group consisting of cellulose acetate, cellulose acetate propionate, and cellulose acetate butyrate;

wherein the polymer (B) is present in an amount in a mass ratio of (B):(A) in the range of 0.05 to 0.2;

wherein the plasticizer (C) is present in an amount in a mass ratio of (C):(A) in the range of 0.03 to 0.2;

wherein a resin molded article obtained by molding the resin composition has a heat distortion temperature according to at least one of the following (1) and/or (2):

(1) a heat distortion temperature of 95° C. or less measured in accordance with ASTM D648-07 B; and/or

(2) a heat distortion temperature of 80° C. or less measured in accordance with ISO 75-2 A (2013);

wherein the resin composition comprises polyhydroxyalkanoate (PHA) in an amount in a mass ratio of PHA:(A) in the range of 0:1 to 0.15:1.

2. The resin composition according to claim 1 , wherein the resin molded article by molding the resin composition has a heat distortion temperature according to at least one of the following (1) and/or (2):

(1) a heat distortion temperature of 90° C. or less measured in accordance with ASTM D648-07 B; and/or

(2) a heat distortion temperature of 75° C. or less measured in accordance with ISO 75-2 A (2013).

3. The resin composition according to claim 1 , wherein the cellulose acrylate (A) is at least one selected from a group consisting of cellulose acetate propionate and cellulose acetate butyrate.

4. The resin composition according to claim 1 , wherein the cellulose acrylate (A) is at least one selected from a group consisting of cellulose acetate propionate and cellulose acetate butyrate.

5. The resin composition according to claim 3 , wherein the polymer (B) is present in an amount in a mass ratio of (B):(A) in the range of 0.07 to 0.15.

6. The resin composition according to claim 5 , wherein the plasticizer (C) is present in an amount in a mass ratio of (C):(A) in the range of 0.05 to 0.1.

7. The resin composition according to claim 1 , wherein the resin composition further comprises an aliphatic polyester (D), with the proviso that, if (D) comprises PHA, the PHA is present in an amount in a mass ratio of PHA:(A) of 0.15:1 or less.

8. The resin composition according to claim 2 , wherein the resin composition further comprises an aliphatic polyester (D), with the proviso that, if (D) comprises PHA, the PHA is present in an amount in a mass ratio of PHA:(A) of 0.15:1 or less.

9. The resin composition according to claim 3 , wherein the resin composition further comprises an aliphatic polyester (D), with the proviso that, if (D) comprises PHA, the PHA is present in an amount in a mass ratio of PHA:(A) of 0.15:1 or less.

10. The resin composition according to claim 4 , wherein the resin composition further comprises an aliphatic polyester (D), with the proviso that, if (D) comprises PHA, the PHA is present in an amount in a mass ratio of PHA:(A) of 0.15:1 or less.

11. The resin composition according to claim 5 , wherein the resin composition further comprises an aliphatic polyester (D), with the proviso that, if (D) comprises PHA, the PHA is present in an amount in a mass ratio of PHA:(A) of 0.15:1 or less.

12. The resin composition according to claim 6 , wherein the resin composition further comprises an aliphatic polyester (D), with the proviso that, if (D) comprises PHA, the PHA is present in an amount in a mass ratio of PHA:(A) of 0.15:1 or less.

13. The resin composition according to claim 7 , wherein the aliphatic polyester (D) is polyhydroxyalkanoate (PHA) and the PHA is present in an amount in a mass ratio of PHA:(A) of 0.15:1 or less.

14. The resin composition according to claim 8 , wherein the aliphatic polyester (D) is polyhydroxyalkanoate (PHA) and the PHA is present in an amount in a mass ratio of PHA:(A) of 0.15:1 or less.

15. The resin composition according to claim 9 , wherein the aliphatic polyester (D) is polyhydroxyalkanoate (PHA) and the PHA is present in an amount in a mass ratio of PHA:(A) of 0.15:1 or less.

16. The resin composition according to claim 10 , wherein the aliphatic polyester (D) is polyhydroxyalkanoate (PHA) and the PHA is present in an amount in a mass ratio of PHA:(A) of 0.15:1 or less.

17. The resin composition according to claim 13 , wherein the aliphatic polyester (D) includes polylactic acid (PLA) and wherein the total PHA content, including PLA, is present in an amount in a mass ratio of PHA:(A) of 0.15:1 or less.

18. A resin molded article comprising the resin composition according to claim 1 .

19. The resin molded article according to claim 18 , wherein the resin molded article is an injection molded article.