RESIN COMPOSITION AND RESIN MOLDED ARTICLE

1 . A resin composition comprising a resin having biomass-derived carbon atoms,

the resin composition satisfying conditions (1A) and (2):

(1A) a static friction coefficient is 0.2 to 0.4, measured according to ISO 8295: 1995, using test pieces each having a weight of 200 g and a contact area of 80 mm×200 mm, prepared from the resin composition; and

(2) a tensile elastic modulus is 1,400 MPa to 2,500 MPa, measured according to ISO 527-1: 2012, using a test piece having a thickness of 4 mm and a width of 10 mm prepared from the resin composition.

2 . A resin composition comprising a resin having biomass-derived carbon atoms,

the resin composition satisfying conditions (1B) and (2):

(1B) a dynamic friction coefficient is 0.1 to 0.3, measured according to ISO 8295: 1995, using test pieces each having a weight of 200 g and a contact area of 80 mm×200 mm, prepared from the resin composition, under a condition of a moving speed of 100 mm/min; and,

(2) a tensile elastic modulus is 1,400 MPa to 2,500 MPa, measured according to ISO 527-1: 2012, using a test piece having a thickness of 4 mm and a width of 10 mm prepared from the resin composition.

3 . The resin composition according to claim 1 , wherein the content of the biomass-derived carbon atoms in the resin composition defined in ASTM D 6866: 2012 is 30% or more based on the total amount of carbon atoms in the resin composition.

4 . The resin composition according to claim 1 , satisfying a condition (3):

(3) a ratio of the static friction coefficient (SFC) to the tensile elastic modulus (EM) is 0.00009<(SFC)/(EM)<0.0003.

5 . The resin composition according to claim 2 , satisfying a condition (4):

(4) a ratio of the dynamic friction coefficient (DFC) to the tensile elastic modulus (EM) is 0.00004<(DFC)/(EM)<0.00018.

6 . The resin composition according to claim 1 , wherein the resin having the biomass-derived carbon atoms contains a cellulose acylate (A).

7 . The resin composition according to claim 6 , wherein the cellulose acylate (A) is at least one of cellulose acetate propionate (CAP) and cellulose acetate butyrate (CAB).

8 . The resin composition according to claim 6 , wherein the content of the cellulose acylate (A) with respect to the resin composition is 50 mass % or more.

9 . The resin composition according to claim 1 , further comprising at least one ester compound (B) selected from the group consisting of a compound represented by the following General Formula (1), a compound represented by the following General Formula (2), a compound represented by the following General Formula (3), a compound represented by the following General Formula (4), and a compound represented by the following General Formula (5):

wherein,

in the General Formula (1), R 11 represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms, and R 12 represents an aliphatic hydrocarbon group having 9 to 28 carbon atoms;

in the General Formula (2), R 21 and R 22 each independently represent an aliphatic hydrocarbon group having 7 to 28 carbon atoms;

in the General Formula (3), R 31 and R 32 each independently represent an aliphatic hydrocarbon group having 7 to 28 carbon atoms;

in the General Formula (4), R 41 , R 42 , and R 43 each independently represent an aliphatic hydrocarbon group having 7 to 28 carbon atoms; and

in the General Formula (5), R 51 , R 52 , R 53 , and R 54 each independently represent an aliphatic hydrocarbon group having 7 to 28 carbon atoms.

10 . The resin composition according to claim 9 , wherein the resin having the biomass-derived carbon atoms contains the cellulose acylate (A), and the mass ratio (B/A) of the ester compound (B) to the cellulose acylate (A) is 0.0025 to 0.1.

11 . The resin composition according to claim 9 , wherein the mass ratio (B/A Bio ) of the ester compound (B) to the resin (A Bio ) having the biomass-derived carbon atom is 0.002 to 0.08.

12 . The resin composition according to claim 1 , further comprising a plasticizer (C).

13 . The resin composition according to claim 12 , wherein the plasticizer (C) contains at least one selected from the group consisting of a cardanol compound, a dicarboxylic acid diester, a citrate, a polyether compound having at least one unsaturated bond in the molecule, a polyether ester compound, a glycol benzoate ester, a compound represented by the following General Formula (6) and an 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.

14 . The resin composition according to claim 12 , wherein the plasticizer (C) comprises a cardanol compound.

15 . The resin composition according to claim 12 , wherein the mass ratio (C/A Bio ) of the processing aid (C) to the resin (A Bio ) having the biomass-derived carbon atom is 0.04 to 0.18.

16 . The resin composition according to claim 1 , wherein the resin composition comprises a thermoplastic elastomer (D).

17 . The resin composition according to claim 16 , wherein the thermoplastic elastomer (D) comprises at least one selected from the group consisting of:

a core-shell structure polymer (d1) having a core layer and a shell layer containing an alkyl (meth)acrylate polymer on the 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 mass % or more of a structural unit derived from the α-olefin.

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.

20 . The resin composition according to claim 2 , wherein the content of the biomass-derived carbon atoms in the resin composition defined in ASTM D 6866: 2012 is 30% or more based on the total amount of carbon atoms in the resin composition.