# US 10,311,995 B2 · Thermoplastic polyurethane resin composition, conductor covering material, and manufacturing method of these > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,311,995 B2 - Document ID: US10311995B2 - Status: Granted - Kind: B2 - Application number: 15/302,795 - Filed: 2015-04-07 - Published: 2017-02-02 - Granted: 2019-06-04 - Earliest claimed: 2014-04-07 - Assignees: Kaneka Corporation; Showa Kasei Kogyo Co., Ltd. - Applicants: Kaneka Corporation; Showa Kasei Kogyo Co., Ltd. - Inventors: Aki Ohtake; Hideyuki Hatsuno; Kazuya Takahashi; Atsunari Kawai; Yoshiaki Matsuoka - Web page: https://patentgrep.com/patent/US10311995B2 ## CPC - H01B 3/302: {Polyurethanes or polythiourethanes; Polyurea or polythiourea} - C08L 75/06: from polyesters - H01B 3/447: {from acrylic compounds} - H01B 7/02: Disposition of insulation - H01B 17/62: Insulating-layers or insulating-films on metal bodies - C08L 2201/02: Flame or fire retardant/resistant - C08L 2203/202: use in electrical wires or wirecoating - C08L 2207/04: Thermoplastic elastomer - C08L 2207/53: Core-shell polymer - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract Provided are a thermoplastic polyurethane resin composition that achieves excellent flame retardancy, a conductor covering material having excellent characteristics, and manufacturing methods therefor. A thermoplastic polyurethane resin composition and a conductor covering material (20) according to embodiments of the present invention each include: 100 parts by weight of a resin component formed of 58.1 parts by weight or more and 73.9 parts by weight or less of a thermoplastic polyurethane resin, and 26.1 parts by weight or more and 41.9 parts by weight or less of core-shell polymer particles; and 42 parts by weight or more and 87 parts by weight or less of a phosphoric acid ester-based flame retardant. ## Claims ### Claim 1 A thermoplastic polyurethane resin composition, comprising: 100 parts by weight of a resin component formed of 58.1 parts by weight or more and 73.9 parts by weight or less of a thermoplastic polyurethane resin and 26.1 parts by weight or more and 41.9 parts by weight or less of core-shell polymer particles; and 42 parts by weight or more and 87 parts by weight or less of a phosphoric acid ester-based flame retardant, wherein: the core-shell polymer particles each include one or more core layers and one or more shell layers; the core layers include an outermost core layer composed of a polymer having a glass transition temperature of less than 40° C.; the shell layers include a crosslinked shell layer composed of a copolymer obtained by polymerization of raw materials including one or more kinds selected from a group consisting of a (meth)acrylic acid ester and a vinyl cyanide compound, and a polyfunctional monomer, the copolymer having a glass transition temperature of 40° C. or more; and the core-shell polymer particles are one or more kinds selected from a group consisting of the following (a) to (d): (a) core-shell polymer particles each including 50.1 wt % or more and 88.9 wt % or less of the core layers with respect to 100 wt % of a total of the core layers and the shell layers, and having a degree of crosslinking of the crosslinked shell layer of 0.05% or more and 0.42% or less; (b) core-shell polymer particles each including 50.1 wt % or more and 89.4 wt % or less of the core layers with respect to 100 wt % of a total of the core layers and the shell layers, and having a degree of crosslinking of the crosslinked shell layer of more than 0.42% and 0.45% or less; (c) core-shell polymer particles each including 50.1 wt % or more and 90.4 wt % or less of the core layers with respect to 100 wt % of a total of the core layers and the shell layers, and having a degree of crosslinking of the crosslinked shell layer of more than 0.45% and 0.50% or less; and (d) core-shell polymer particles each including 40.1 wt % or more and 90.4 wt % or less of the core layers with respect to 100 wt % of a total of the core layers and the shell layers, and having a degree of crosslinking of the crosslinked shell layer of more than 0.50% and 5.00% or less. ### Claim 2 (depends on 1) The thermoplastic polyurethane resin composition according to claim 1, wherein the copolymer composing the crosslinked shell layer is a copolymer of one or more kinds selected from a group consisting of the (meth)acrylic acid ester and the vinyl cyanide compound, the polyfunctional monomer, and an unsaturated monomer capable of copolymerizing therewith. ### Claim 3 (depends on 1) The thermoplastic polyurethane resin composition according to claim 1, wherein the thermoplastic polyurethane resin composition comprises: 100 parts by weight of the resin component formed of 59.1 parts by weight or more and 73.9 parts by weight or less of the thermoplastic polyurethane resin and 26.1 parts by weight or more and 40.9 parts by weight or less of the core-shell polymer particles; and 42 parts by weight or more and 87 parts by weight or less of the phosphoric acid ester-based flame retardant. ### Claim 4 (depends on 1) The thermoplastic polyurethane resin composition according to claim 1, wherein each of the core-shell polymer particles includes 57.1 wt % or more and 82.0 wt % or less of the core layers with respect to 100 wt % of a total of the core layers and the shell layers. ### Claim 5 A thermoplastic polyurethane resin composition, comprising: 100 parts by weight of a resin component formed of 58.1 parts by weight or more and 73.9 parts by weight or less of a thermoplastic polyurethane resin and 26.1 parts by weight or more and 41.9 parts by weight or less of core-shell polymer particles; and 42 parts by weight or more and 87 parts by weight or less of a phosphoric acid ester-based flame retardant, wherein each of the core-shell polymer particles is composed of one or more core layers and one or more shell layers, and each includes 57.1 wt % or more and 82.0 wt % or less of the core layers with respect to 100 wt % of a total of the core layers and the shell layers, and wherein the core-shell polymer particles have a Shore A hardness of 81 or more and 100 or less, the hardness being measured by a method in conformity with JIS K 6253-3:2012 in which: a type A durometer is used as a testing machine; an automatic timer apparatus is not used; a laminate obtained by laminating 6 sheets (30 mm×40 mm) each having a thickness of 1.0 mm or more and 1.5 mm or less is used as a test piece; the test piece is subjected to conditioning at a temperature of 23° C. and a relative humidity of 50% for 24 hours or more, and then a pressure plate is brought into contact with the test piece at a temperature of 23° C. and a relative humidity of 50%; and a measured value 10 seconds after the contact is read. ### Claim 6 A thermoplastic polyurethane resin composition, comprising: 100 parts by weight of a resin component formed of 58.1 parts by weight or more and 73.9 parts by weight or less of a thermoplastic polyurethane resin and 26.1 parts by weight or more and 41.9 parts by weight or less of core-shell polymer particles; and 42 parts by weight or more and 87 parts by weight or less of a phosphoric acid ester-based flame retardant, wherein each of the core-shell polymer particles is composed of one or more core layers and one or more shell layers, and each includes 57.1 wt % or more and 82.0 wt % or less of the core layers with respect to 100 wt % of a total of the core layers and the shell layers, and wherein each of the one or more shell layers is composed of a polymer obtained by polymerization of a raw material including one or more kinds selected from a group consisting of a (meth)acrylic acid ester and a vinyl cyanide compound, the raw material is free of a polyfunctional monomer, the polymer having a glass transition temperature of 40° C. or more. ### Claim 7 (depends on 6) The thermoplastic polyurethane resin composition according to claim 6, wherein the thermoplastic polyurethane resin composition comprises: 100 parts by weight of the resin component formed of 58.6 parts by weight or more and 73.4 parts by weight or less of the thermoplastic polyurethane resin and 26.6 parts by weight or more and 41.4 parts by weight or less of the core-shell polymer particles. ### Claim 8 (depends on 6) The thermoplastic polyurethane resin composition according to claim 6, wherein the polymer composing each of the one or more shell layers is a copolymer of one or more kinds selected from a group consisting of the (meth)acrylic acid ester and the vinyl cyanide compound, and an unsaturated monomer capable of copolymerizing therewith.