# US 11,028,253 B2 · Resin composition and resin molded article > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,028,253 B2 - Document ID: US11028253B2 - Status: Granted - Kind: B2 - Application number: 16/262,029 - Filed: 2019-01-30 - Published: 2020-03-05 - Granted: 2021-06-08 - Earliest claimed: 2018-08-31 - Assignees: Eastman Chemical Company - Applicants: Eastman Chemical Company - Inventors: Kana Miyazaki; Ryo Tanaka; Kenji Yao - Web page: https://patentgrep.com/patent/US11028253B2 ## CPC - C08L 1/14: Mixed esters, e.g. cellulose acetate-butyrate - B29C 45/0001: {characterised by the choice of material} - C08L 1/10: Esters of organic acids {, i.e. acylates} - B29K 2001/12: {Cellulose acetate} - C08L 2205/03: containing three or more polymers in a blend - C08L 2205/06: having improved processability or containing aids for moulding methods - C08L 2207/53: Core-shell polymer - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS ## Abstract Provided is a resin composition containing: cellulose acylate (A); at least a polymer (B) selected from a 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 an 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). A resin molded article obtained by molding the resin composition satisfies at least one of the following conditions (1) and (2): (1) a heat distortion temperature measured in accordance with an ASTM D648-07 B method is 95° C. or less; and (2) a heat distortion temperature measured in accordance with an ISO 75-2 A method (2013) is 80° C. or less. ## Claims ### Claim 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), R61 represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms, and R62 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. ### Claim 2 (depends on 1) 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). ### Claim 3 (depends on 1) 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. ### Claim 4 (depends on 1) 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. ### Claim 5 (depends on 3) 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. ### Claim 6 (depends on 5) 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. ### Claim 7 (depends on 1) 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. ### Claim 8 (depends on 2) 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. ### Claim 9 (depends on 3) 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. ### Claim 10 (depends on 4) 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. ### Claim 11 (depends on 5) 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. ### Claim 12 (depends on 6) 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. ### Claim 13 (depends on 7) 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. ### Claim 14 (depends on 8) 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. ### Claim 15 (depends on 9) 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. ### Claim 16 (depends on 10) 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. ### Claim 17 (depends on 13) 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. ### Claim 18 (depends on 1) A resin molded article comprising the resin composition according to claim 1. ### Claim 19 (depends on 18) The resin molded article according to claim 18, wherein the resin molded article is an injection molded article.