RESIN COMPOSITION AND RESIN MOLDED ARTICLE

1 . A resin composition comprising a resin having a biomass-derived carbon atom, the resin composition satisfying conditions (1), (2) and (3):

(1) a puncture energy value of a puncture impact test measured with a striker mass of 5 kg and a falling height of 0.66 m in accordance with ISO 6603-2:2000 using a test piece of 2 mm in thickness prepared from the resin composition is 10 J or more;

(2) a tensile elastic modulus measured in accordance with 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 is 1500 MPa or more; and

(3) a value of melt mass flow rate (MFR) measured in accordance with ISO 1133:1997 at a load of 10 kgf and a temperature of 200° C. is 5 g/min to 90 g/min.

2 . The resin composition according to claim 1 , wherein the content of the biomass-derived carbon atom in the resin composition defined in ASTM D6866:2012 is 30% or more based on a total amount of carbon atoms in the resin composition.

3 . The resin composition according to claim 1 , wherein the resin composition further satisfies condition (4):

(4) a ratio of the puncture energy value (PI) of the puncture impact test to the tensile elastic modulus (EM) is within a range of 0.004<(PI)/(EM)<0.014.

4 . The resin composition according to claim 1 , wherein the resin composition further satisfies condition (5):

(5) a ratio of the puncture energy value (PI) of the puncture impact test to the value (MV) of melt mass flow rate (MFR) is within a range of 0.13<(PI)/(MV)<2.

5 . The resin composition according to claim 1 , wherein the resin having a biomass-derived carbon atom comprises a cellulose acylate (A).

6 . The resin composition according to claim 1 , wherein the cellulose acylate (A) is at least one of cellulose acetate propionate (CAP) and cellulose acetate butyrate (CAB).

7 . The resin composition according to claim 1 , wherein the content of the cellulose acylate (A) relative to the resin composition is 50 mass % or more.

8 . 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)

in the General Formula (1), R 11 represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms, and R 2 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.

9 . The resin composition according to claim 8 , wherein the resin having a biomass-derived carbon atom comprises a cellulose acylate (A), and a mass ratio (B/A) of the ester compound (B) to the cellulose acylate (A) is 0.0025 to 0.1.

10 . The resin composition according to claim 8 , wherein a mass ratio (B/A Bio ) of the ester compound (B) to the resin having a biomass-derived carbon atom (A Bio ) is 0.002 to 0.08.

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

12 . The resin composition according to claim 11 , wherein the plasticizer (C) comprises at least one selected from the group consisting of a cardanol compound, a dicarboxylic acid diester, a citric acid ester, a polyether compound having at least one unsaturated bond in the molecule, a polyether ester compound, a benzoic acid glycol ester, a compound represented by the following General Formula (6) and an epoxidized fatty acid ester:

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.

13 . The resin composition according to claim 11 , wherein the plasticizer (C) comprises a cardanol compound.

14 . The resin composition according to claim 11 , wherein a mass ratio (C/A Bio ) of the plasticizer (C) to the resin having a biomass-derived carbon atom (A Bio ) is 0.04 to 0.18.

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

16 . The resin composition according to claim 15 , wherein the thermoplastic elastomer (D) comprises at least one selected from the group consisting of: a core-shell structure polymer (d1) including 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.

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

18 . The resin molded article according to claim 17 , wherein the resin molded article is an injection molded article.

19 . The resin composition according to claim 2 , wherein the resin composition further satisfies condition (4):

(4) a ratio of the puncture energy value (PI) of the puncture impact test to the tensile elastic modulus (EM) is within a range of 0.004<(PI)/(EM)<0.014.

20 . The resin composition according to claim 2 , wherein the resin composition further satisfies condition (5):

(5) a ratio of the puncture energy value (PI) of the puncture impact test to the value (MV) of melt mass flow rate (MFR) is within a range of 0.13<(PI)/(MV)<2.