Resin composition and resin molded article

1. A resin composition comprising:

a cellulose acylate (A);

a cardanol compound (B); and

a compound (C) being at least one selected from the group consisting of a hindered phenol compound, a phosphite compound, and combinations thereof;

wherein said hindered phenol compound comprises at least one compound selected from the group consisting of a compound represented by a general formula (HP1) and a compound represented by a general formula (HP2),

wherein R 11 and R 12 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, L 11 represents a single bond or a divalent linking group, X 11 represents a single bond or an n-valent group, and n represents 1, 2, 3 or 4, and R 21 , R 22 , R 23 , R 24 , and R 25 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms; and

wherein said phosphite compound comprises at least one selected from the group consisting of a compound represented by a general formula (P1), a compound represented by a general formula (P2), and a compound represented by a general formula (P3),

wherein R 41 , R 42 and R 43 each independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, Y 41 and Y 42 each independently represent an aliphatic hydrocarbon group, n 41 represents 1, 2 or 3, m 41 represents 0 or 1, m42 represents 0 or 1, and n 41 +m 41 +m 42 =3, R 51 , R 52 , R 53 , R 54 , R 55 , and R 56 each independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, and L 51 represents a single bond or a divalent linking group and, R 61 , R 62 , R 63 , R 64 , R 65 , and R 66 each independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, and L 61 and L 62 each independently represent a single bond or a divalent linking group.

2. The resin composition according to claim 1 , wherein the cellulose acylate (A) contains at least one selected from the group consisting of cellulose acetate propionate and cellulose acetate butyrate.

3. The resin composition according to claim 1 , wherein the cardanol compound (B) contains a cardanol compound having a molecular weight of 500 or less.

4. The resin composition according to claim 1 , further comprising a thermoplastic elastomer (D).

5. The resin composition according to claim 4 , wherein the thermoplastic elastomer (D) contains at least one selected from the group consisting of: a core-shell structure polymer (d1) that has a core layer and a shell layer containing an alkyl (meth)acrylate polymer on a surface of the core layer; and an olefin polymer (d2) that is a polymer of an α-olefin and an alkyl (meth)acrylate and contains 60% by mass or more of a structural unit derived from the α-olefin.

6. The resin composition according to claim 1 , wherein a mass percentage of the compound (C) based on a total amount of the cellulose acylate (A), the cardanol compound (B) and the compound (C) is from 0.1% by mass to 5% by mass.

7. The resin composition according to claim 1 , wherein a content of the cellulose acylate (A) in the resin composition based on a total amount of the resin composition is 50% by mass or more.

8. The resin composition according to claim 1 , wherein a content ratio of the cardanol compound (B) to the cellulose acylate (A) is 0.03≤(B)/(A)≤0.3.

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

10. The resin molded article according to claim 9 , wherein the resin molded article is an injection molded article.

11. The resin composition according to claim 1 , wherein said hindered phenol compound is chosen from pentaerythritol tetrakis(3-(3′,5′-di-t-butyl-4′-hydroxyphenyl)propionate); ethylenebis(oxyethylene) bis(3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate); 2,2′-dimethyl-2,2′-(2,4,8,10-tetraoxaspiro(5.5)undecane-3,9-diyl)dipropane-1,1′-diyl bis(3-(3-tert-butyl-4-hydroxy-5-methylphenyl) propanoate); 2-t-butyl-6-(3-t-butyl-2-hydroxy-5-methylbenzyl)-4-methylphenyl acrylate; 2-(1-(2-hydroxy-3,5-di-t-pentylphenyl)ethyl)-4,6-di-t-pentylphenyl acrylate; and combinations thereof.

12. The resin composition according to claim 1 , wherein said phosphite compound is chosen from tris(2,4-di-t-butylphenyl) phosphite; 6-(3-(3-t-butyl-4-hydroxy-5-methylphenyl)propoxy)-2,4,8,10-tetra-t-butyl dibenzo(d,f)(1,3,2)dioxaphosphepin; and

combinations thereof.

13. The resin composition according to claim 1 , wherein the compound (C) comprises a combination of pentaerythritol tetrakis(3-(3′,5′-di-t-butyl-4′-hydroxyphenyl)propionate) and tris(2,4-di-t-butylphenyl) phosphite.

14. The resin composition according to claim 1 , wherein the compound (C) comprises a hindered phenol compound comprising at least one compound selected from the group consisting of a compound represented by a general formula (HP1) and a compound represented by a general formula (HP2),

wherein R 11 and R 12 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, L 11 represents a single bond or a divalent linking group, X 11 represents a single bond or an n-valent group, and n represents 1, 2, 3 or 4, and R 21 , R 22 , R 23 , R 24 , and R 25 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.

15. The resin composition according to claim 1 , wherein the compound (C) comprises a phosphite compound comprising at least one selected from the group consisting of a compound represented by a general formula (P1), a compound represented by a general formula (P2), and a compound represented by a general formula (P3),

wherein R 41 , R 42 and R 43 each independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, Y 41 and Y 42 each independently represent an aliphatic hydrocarbon group, n 41 represents 1, 2 or 3, m 41 represents 0 or 1, m42 represents 0 or 1, and n 41 +m 41 +m 42 =3, R 51 , R 52 , R 53 , R 54 , R 55 , and R 56 each independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, and L 51 represents a single bond or a divalent linking group and, R 61 , R 62 , R 63 , R 64 , R 65 , and R 66 each independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, and L 61 and L 62 each independently represent a single bond or a divalent linking group.