# US 2021/0277224 A1 · Hydrogenated block copolymer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0277224 A1 - Document ID: US20210277224A1 - Status: Published application - Kind: A1 - Application number: 17/256,513 - Filed: 2019-06-28 - Published: 2021-09-09 - Earliest claimed: 2018-06-29 - Assignees: Kuraray Co., Ltd. - Applicants: Kuraray Co., Ltd. - Inventors: Naoto TAKAHASHI; Yusuke NOJIMA - Web page: https://patentgrep.com/patent/US20210277224A1 ## CPC - A61J 1/1468: {Containers characterised by specific material properties} - C08L 53/025: {modified} - A61J 1/10: Bag-type containers - B32B 27/08: of synthetic resin - B32B 27/18: characterised by the use of special additives - B32B 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers} - B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} - C08F 8/04: Reduction, e.g. hydrogenation - C08F 112/08: Styrene - C08F 136/06: Butadiene - C08F 136/08: Isoprene - C08F 297/046: {polymerising vinyl aromatic monomers and isoprene, optionally with other conjugated dienes} - C08L 23/06: Polyethylene - C08L 23/12: Polypropene - C08L 23/14: Copolymers of propene (C08L23/16 takes precedence) - C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers - B32B 2250/02: 2 layers - B32B 2250/03: 3 layers - B32B 2250/24: All layers being polymeric - B32B 2250/246: All polymers belonging to those covered by groups B32B27/32 and B32B27/30 - B32B 2307/31: Heat sealable - B32B 2307/732: Dimensional properties - B32B 2439/46: Bags - B32B 2439/70: Food packaging - B32B 2439/80: Medical packaging - B32B 2535/00: Medical equipment, e.g. bandage, prostheses or catheter - C08L 2203/02: for biomedical use - C08L 2203/162: sealable films - A61J: CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS ## Abstract A hydrogenated block copolymer containing polymer blocks (A1) and (A2) each mainly containing an aromatic vinyl compound-derived structural unit and polymer blocks (B) and (C) each mainly containing a conjugated diene compound-derived structural unit, at least one of the polymer blocks (B) and (C) being present between the polymer blocks (A1) and (A2), the hydrogenated block copolymer having a total content of the polymer blocks (A1) and (A2) of 5 to 30% by mass, a 3,4-bond and 1,2-bond content in the polymer block (B) of 1 to 40% by mole, a 3,4-bond and 1,2-bond content in the polymer block (C) of 50 to 100% by mole, and a mass ratio [(C)/{(B)±(C)} of the polymer block (C) to the sum of the polymer blocks (B) and (C) of 26/100 to 63/100. ## Claims ### Claim 1 A hydrogenated block copolymer comprising: polymer blocks (A1) and (A2) each comprising an aromatic vinyl compound-derived structural unit, and polymer blocks (B) and (C) each comprising a conjugated diene compound-derived structural unit, wherein at least one of the polymer blocks (B) and (C) is present between the polymer blocks (A1) and (A2), the hydrogenated block copolymer has a total content of the polymer blocks (A1) and (A2) of from 5 to 30% by mass, a 3,4-bond and 1,2-bond content in the polymer block (B) of from 1 to 40% by mole, a 3,4-bond and 1,2-bond content in the polymer block (C) of from 50 to 100% by mole, and a mass ratio [(C)/{(B)+(C)}] of the polymer block (C) to the sum of the polymer blocks (B) and (C) of from 26/100 to 63/100. ### Claim 2 (depends on 1) The hydrogenated block copolymer according to claim 1, wherein the hydrogenated block copolymer is constituted of four blocks of the polymer blocks (A1) and (A2) and the polymer blocks (B) and (C). ### Claim 3 (depends on 1) The hydrogenated block copolymer according to claim 1, wherein the polymer blocks (A1) and (A2) and the polymer blocks (B) and (C) are present in an order of (A1)-(B)-(A2)-(C). ### Claim 4 (depends on 1) The hydrogenated block copolymer according to claim 1, wherein the hydrogenated block copolymer has a weight average molecular weight of from 60,000 to 500,000. ### Claim 5 (depends on 1) A resin composition (Z), comprising: a hydrogenated block copolymer (X) that is the hydrogenated block copolymer according to claim 1 and a polypropylene-based resin (Y), wherein the hydrogenated block copolymer (X) and the polypropylene-based resin (Y) satisfy a condition, in which when 30 parts by mass of the hydrogenated block copolymer (X) and 70 parts by mass of the polypropylene-based resin (Y) are kneaded under conditions of 230° C. and a shear rate of 30 to 150 s−1, a sea-island structure in which the hydrogenated block copolymer (X) is a dispersed phase is formed, the dispersed phase having a size of 0.1 μm or more and 1.0 μm or less. ### Claim 6 (depends on 1) A resin composition (Z), comprising: a hydrogenated block copolymer (X) that is the hydrogenated block copolymer according to claim 1 and a polypropylene-based resin (Y), wherein the resin composition (Z) has a mass ratio [(Y)/{(X)+(Y)}] of the polypropylene-based resin (Y) to the sum of the hydrogenated block copolymer (X) and the polypropylene-based resin (Y) of from 61/100 to 95/100. ### Claim 7 (depends on 5) The resin composition according to claim 5, wherein the hydrogenated block copolymer (X) has a viscosity (η(X)) and the polypropylene-based resin (Y) has a viscosity (η(Y)) at 230° C. and at a shear rate of 60 s−1, and the resin composition has a ratio [η(X)/η(Y)] of the viscosity (η(X)) to the viscosity (η(Y)) of from 0.6 to 8.0. ### Claim 8 (depends on 5) A film, comprising the resin composition according to claim 5. ### Claim 9 (depends on 8) A liquid-packaging container, comprising the film according to claim 8. ### Claim 10 (depends on 9) The liquid-packaging container according to claim 9, wherein the film has a structure of at least two layers including an inner layer and an outer layer, the inner layer comprises the resin composition (Z), and the outer layer comprises a resin composition (P) that comprises 60% by mass or more of a polypropylene-based resin (Y′) having a propylene-derived structural unit content of 60% by mole or more. ### Claim 11 (depends on 9) The liquid-packaging container according to claim 9, wherein the film has a structure of three or more layers including at least one intermediate layer between an inner layer and an outer layer, either or both of the inner layer and the intermediate layer comprises the resin composition (Z), comprises, and the outer layer comprises a resin composition (P) that comprises 60% by mass or more of a polypropylene-based resin (Y′) having a propylene-derived structural unit content of 60% by mole or more. ### Claim 12 (depends on 11) The liquid-packaging container according to claim 11, wherein the inner layer has a thickness in the range of from 5 to 30 μm, the intermediate layer has a thickness in the range of from 90 to 300 μm, and the outer layer has a thickness in the range of from 15 to 120 μm. ### Claim 13 (depends on 11) The liquid-packaging container according to claim 11, wherein the inner layer comprises a resin component having a melting point MPin and the intermediate layer comprises a resin component having a melting point MPmid, and the melting point MPin and the melting point MPmid satisfy formula: MPin