# US 9,752,027 B2 · Thermoplastic elastomer composition and molded body > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,027 B2 - Document ID: US9752027B2 - Status: Granted - Kind: B2 - Application number: 14/787,923 - Filed: 2014-09-29 - Published: 2016-04-21 - Granted: 2017-09-05 - Earliest claimed: 2013-09-30 - Assignees: Kuraray Co., Ltd.; Amyris, Inc. - Applicants: Kuraray Co., Ltd.; Amyris, Inc. - Inventors: Hiromitsu Sasaki; Yosuke Uehara; Masahiro Kato - Web page: https://patentgrep.com/patent/US9752027B2 ## CPC - C08L 53/02: of vinyl-aromatic monomers and conjugated dienes - C08F 8/04: Reduction, e.g. hydrogenation - C08F 297/04: polymerising vinyl aromatic monomers and conjugated dienes - C08K 5/01: Hydrocarbons {(C08K5/0091 takes precedence)} - C08L 53/025: {modified} - C08F 2800/20: as weight or mass percentages - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract The thermoplastic elastomer composition of the present invention is a thermoplastic elastomer composition including a hydrogenated block copolymer (A) and a softening agent (B), the hydrogenated block copolymer (A) being a hydrogenated product of a block copolymer including a polymer block (a) composed of a constitutional unit derived from an aromatic vinyl compound and a polymer block (b) containing 1 to 100% by mass of a constitutional unit (b1) derived from farnesene and 99 to 0% by mass of a constitutional unit (b2) derived from a conjugated diene other than farnesene; a mass ratio of the polymer block (a) and the polymer block (b) [(a)/(b)] being 1/99 to 70/30; 50 mol % or more of carbon-carbon double bonds in the polymer block (b) being hydrogenated; and a content of the softening agent (B) being 20 to 2,000 parts by mass on the basis of 100 parts by mass of the hydrogenated block copolymer (A). ## Claims ### Claim 1 A thermoplastic elastomer composition comprising a hydrogenated block copolymer (A) and a softening agent (B), the hydrogenated block copolymer (A) being a hydrogenated product of a block copolymer including a polymer block (a) composed of a constitutional unit derived from an aromatic vinyl compound and a polymer block (b) containing 30 to 100% by mass of a constitutional unit (b1) derived from farnesene and 70 to 0% by mass of a constitutional unit (b2) derived from a conjugated diene other than farnesene, a mass ratio of the polymer block (a) and the polymer block (b) [(a)/(b)] being 10/90 to 60/40, 70 to 100 mol % of carbon-carbon double bonds in the polymer block (b) being hydrogenated, and a content of the softening agent (B) being 20 to 200 parts by mass on the basis of 100 parts by mass of the hydrogenated block copolymer (A), wherein the aromatic vinyl compound comprises at least one selected from the group consisting of styrene, α-methylstyrene and 4-methylstyrene, the conjugated diene other than farnesene comprises at least one selected from the group consisting of butadiene, isoprene and myrcene, and the softening agent (B) comprises at least one selected from the group consisting of paraffin-based process oils, naphthene-based process oils and aromatic process oils, phthalic acid derivatives, white oils, liquid co-oligomers of ethylene and an α-olefin, liquid paraffins, low-molecular weight polyisobutylene, liquid polydienes, and hydrogenated products thereof. ### Claim 2 (depends on 1) The thermoplastic elastomer composition according to claim 1, wherein the thermoplastic elastomer composition further comprises a polyolefin-based resin (C), and a content of the polyolefin-based resin (C) is 5 to 200 parts by mass on the basis of 100 parts by mass of the hydrogenated block copolymer (A). ### Claim 3 (depends on 1) The thermoplastic elastomer according to claim 1, wherein a total content of the hydrogenated block copolymer (A) and the softening agent (B) in the thermoplastic elastomer composition is 90% by mass or more. ### Claim 4 (depends on 1) The thermoplastic elastomer composition according to claim 1, wherein the farnesene is β-farnesene. ### Claim 5 (depends on 1) The thermoplastic elastomer composition according to claim 1, wherein a peak top molecular weight (Mp) of the hydrogenated block copolymer (A) is 4,000 to 1,500,000. ### Claim 6 (depends on 1) The thermoplastic elastomer composition according to claim 1, wherein a molecular weight distribution (Mw/Mn) of the hydrogenated block copolymer (A) is 1 to 4. ### Claim 7 (depends on 1) The thermoplastic elastomer composition according to claim 1, wherein the aromatic vinyl compound is styrene. ### Claim 8 (depends on 1) The thermoplastic elastomer composition according to claim 1, wherein the hydrogenated block copolymer (A) is a hydrogenated product of a block copolymer including at least two of the polymer blocks (a) and at least one of the polymer blocks (b). ### Claim 9 (depends on 1) A molded body comprising the thermoplastic elastomer composition according to claim 1. ### Claim 10 (depends on 1) The thermoplastic elastomer composition according to claim 1, wherein the content of the softening agent (B) is 50 to 200 parts by mass on the basis of 100 parts by mass of the hydrogenated block copolymer (A).