# US 10,119,017 B2 · Resin composition and sheet-shaped molded body thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,119,017 B2 - Document ID: US10119017B2 - Status: Granted - Kind: B2 - Application number: 15/122,974 - Filed: 2015-03-10 - Published: 2017-03-16 - Granted: 2018-11-06 - Earliest claimed: 2014-03-12 - Assignees: Asahi Kasei Kabushiki Kaisha - Applicants: Asahi Kasei Kabushiki Kaisha - Inventors: Hiroyuki Ichino; Toshikazu Hoshina; Yasuhiro Kusanose - Web page: https://patentgrep.com/patent/US10119017B2 ## CPC - C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers - B65D 65/02: Wrappers or flexible covers - C08F 297/04: polymerising vinyl aromatic monomers and conjugated dienes - C08L 23/142: {at least partially crystalline copolymers of propene with other olefins} - C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS ## Abstract A resin composition according to the present invention contains a polypropylene-based resin (a), a hydrogenated block copolymer (b), and a hydrogenated block copolymer (c) in a particular mass ratio, and the hydrogenated block copolymer (b) and the hydrogenated block copolymer (c) have particular constitution. Moreover, a sheet-shaped molded body according to the present invention contains the resin composition according to the present invention. Furthermore, a packaging material for medical use, foodstuffs or clothes according to the present invention contains the sheet-shaped molded body according to the present invention. ## Claims ### Claim 1 A resin composition comprising: a polypropylene-based resin (a) having a number average molecular weight of 50000 or higher; a hydrogenated block copolymer (b); a hydrogenated block copolymer (c); and a polyolefin resin (d) having a number average molecular weight of lower than 50000, wherein the hydrogenated block copolymer (b) comprises: at least one polymer block A comprising an aromatic vinyl compound unit as a main constituent; and at least one polymer block B comprising a conjugated diene compound unit as a main constituent, a total content of the aromatic vinyl compound unit in the hydrogenated block copolymer (b) is 5 to 30% by mass, 80 mol % or more of all the conjugated diene compound units in the hydrogenated block copolymer (b) is hydrogenated, an amount of vinyl bond of the hydrogenated block copolymer (b) before hydrogenation is more than 60 mol %, the hydrogenated block copolymer (c) comprises: at least one polymer block C comprising an aromatic vinyl compound unit as a main constituent; and at least one polymer block D comprising a conjugated diene compound unit as a main constituent, a total content of the aromatic vinyl compound unit in the hydrogenated block copolymer (c) is 5 to 30% by mass, 80 mol % or more of all the conjugated diene compound units in the hydrogenated block copolymer (c) is hydrogenated, an amount of vinyl bond of the hydrogenated block copolymer (c) before hydrogenation is 40 to 60 mol %, a mass ratio of a content of the hydrogenated block copolymer (b) to a content of the hydrogenated block copolymer (c), (b)/(c), is 20/80 to 80/20, a mass ratio of a content of the polypropylene-based resin (a) to the total content of the hydrogenated block copolymer (b) and the hydrogenated block copolymer (c), (a)/((b)+(c)), is 40/60 to 90/10, and a content of the polyolefin resin (d) in the resin composition is 0.01 to 1.5 parts by mass based on 100 parts by mass of the total content of the hydrogenated block copolymer (b) and the hydrogenated block copolymer (c). ### Claim 2 (depends on 1) The resin composition according to claim 1, wherein the polypropylene-based resin (a) comprises a propylene-α-olefin random copolymer having a propylene content of 98% by mass or less. ### Claim 3 (depends on 1) The resin composition according to claim 1, wherein the polyolefin resin (d) is a homopolymer of ethylene. ### Claim 4 (depends on 1) The resin composition according to claim 1, wherein the total content of the aromatic vinyl compound unit in the hydrogenated block copolymer (b) is 8 to 17% by mass. ### Claim 5 (depends on 1) The resin composition according to claim 1, wherein a difference between the total content of the aromatic vinyl compound unit in the hydrogenated block copolymer (b) and the total content of the aromatic vinyl compound unit in the hydrogenated block copolymer (c) is 8% by mass or less, and an average of the total content of the aromatic vinyl compound unit in the hydrogenated block copolymer (b) and the total content of the aromatic vinyl compound unit in the hydrogenated block copolymer (c) is 9 to 20% by mass. ### Claim 6 (depends on 1) The resin composition according to claim 1, wherein the hydrogenated block copolymer (b) is represented by a structure of A1-B1-A2-B2, A1 and A2 in the structure are included in the polymer block A and are same or different, B1 and B2 in the structure are included in the polymer block B, and a content of B2 in the hydrogenated block copolymer (b) is 0.1 to 9.1% by mass. ### Claim 7 (depends on 1) The resin composition according to claim 1, wherein the mass ratio, (b)/(c), is 40/60 to 60/40. ### Claim 8 (depends on 1) The resin composition according to claim 1, wherein the mass ratio, (a)/((b)+(c)), is 60/40 to 80/20. ### Claim 9 (depends on 1) The resin composition according to claim 1, wherein the content of the hydrogenated block copolymer (b) is more than 5% by mass. ### Claim 10 (depends on 1) A sheet-shaped molded body, comprising the resin composition according to claim 1. ### Claim 11 (depends on 1) The sheet-shaped molded body comprising the resin composition according to claim 1, wherein the sheet-shaped molded body has a haze (%) of 4% or less in terms of a thickness of 0.2 mm. ### Claim 12 (depends on 10) A packaging material for medical use, foodstuffs or clothes, comprising the sheet-shaped molded body according to claim 10. ### Claim 13 (depends on 2) The resin composition according to claim 2, wherein the polypropylene-based resin (a) has a number average molecular weight of 50000 or higher, and the resin composition further comprises 0.01 to 1.5 parts by mass of a polyolefin resin (d) having a number average molecular weight of lower than 50000, based on 100 parts by mass of the total content of the hydrogenated block copolymer (b) and the hydrogenated block copolymer (c). ### Claim 14 (depends on 2) The resin composition according to claim 2, wherein the polyolefin resin (d) is a homopolymer of ethylene.