# US 12,767,799 B2 · Resin composition, resin-coating material, insulated wire, vehicle wire harness, and method of producing insulated wire to be used in vehicle wire harness > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,767,799 B2 - Document ID: US12767799B2 - Status: Granted - Kind: B2 - Application number: 18/142,126 - Filed: 2023-05-02 - Published: 2023-08-31 - Granted: 2026-10-20 - Earliest claimed: 2021-11-22 - Assignees: Furukawa Electric Co., Ltd.; Furukawa Automotive Systems Inc. - Applicants: Furukawa Electric Co., Ltd.; Furukawa Automotive Systems Inc. - Inventors: Kenji Takahashi; Hideyuki Osuga - Web page: https://patentgrep.com/patent/US12767799B2 ## CPC - C08L 23/0853: Ethylene vinyl acetate copolymers - H01B 3/446: {from vinylacetals} - C08L 2203/202: use in electrical wires or wirecoating - C08L 2205/035: containing four or more polymers in a blend - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - 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}) ## Abstract A resin composition, including the following components (A) and (B); and at least one kind of the following components (C) and (D): (A) a low density polyethylene resin; (B) an ethylene-vinyl acetate copolymer resin; (C) a thioether compound; and (D) fluororubber, in which: a content of the component (A) is 5 to 40 parts by mass and a content of the component (B) is 60 to 95 parts by mass in 100 parts by mass of a total content of the components (A) and (B), a total content of the components (C) and (D) is 0.05 to 1 part by mass with respect to 100 parts by mass of the total content of the components (A) and (B), and a proportion of a vinyl acetate component in the component (B) is 40 mass % or less. ## Claims ### Claim 1 An insulating resin composition, comprising: the following components (A) and (B); and at least one of the following components (C) and (D): (A) a low density polyethylene resin; (B) an ethylene-vinyl acetate copolymer resin; (C) a thioether compound; and (D) fluororubber, wherein a content of the component (A) is 5 to 40 parts by mass and a content of the component (B) is 60 to 95 parts by mass in 100 parts by mass of a total content of the components (A) and (B), wherein a total content of the components (C) and (D) is 0.05 to 1 part by mass with respect to 100 parts by mass of the total content of the components (A) and (B), and wherein a proportion of a vinyl acetate component in the component (B) is 40 mass % or less. ### Claim 2 (depends on 1) The insulating resin composition according to claim 1, wherein the proportion of the vinyl acetate component in the component (B) is 7 mass % or more. ### Claim 3 (depends on 1) The insulating resin composition according to claim 1, wherein a content of the component (C) is 0.7 parts by mass or less and a content of the component (D) is 1 part by mass or less with respect to 100 parts by mass of the total content of the components (A) and (B). ### Claim 4 (depends on 1) The insulating resin composition according to claim 1, wherein the content of the component (A) is more than 20 parts by mass and 40 parts by mass or less and the content of the component (B) is 60 parts by mass or more and less than 80 parts by mass in 100 parts by mass of the total content of the components (A) and (B), and wherein a content of the component (C) is 0.5 parts by mass or less with respect to 100 parts by mass of the total content of the components (A) and (B). ### Claim 5 (depends on 1) The insulating resin composition according to claim 1, wherein the content of the component (A) is 5 parts by mass or more and 20 parts by mass or less and the content of the component (B) is 80 parts by mass or more and 95 parts by mass or less in 100 parts by mass of the total content of the components (A) and (B), and wherein the total content of the components (C) and (D) is 0.5 to 1 part by mass with respect to 100 parts by mass of the total content of the components (A) and (B). ### Claim 6 (depends on 1) The insulating resin composition according to claim 1, having a VA value of 15 or more, the VA value calculated with a formula described below: VA value=[content (parts by mass) of component (B) in 100 parts by mass of total content of components (A) and (B)]×[proportion (mass %) of vinyl acetate component in component (B)]/100 wherein the total content of the components (C) and (D) is 0.5 to 1 part by mass with respect to 100 parts by mass of the total content of the components (A) and (B). ### Claim 7 (depends on 1) The insulating resin composition according to claim 1, comprising one or more of a flame retardant, an antioxidant, a processing aid, and a crosslinking aid other than the components (A) to (D). ### Claim 8 (depends on 1) A vehicle wire harness comprising the insulating resin composition according to claim 1. ### Claim 9 (depends on 1) A resin-coating material obtained by crosslinking the insulating resin composition according to claim 1. ### Claim 10 (depends on 9) An insulated wire, comprising an insulating film including the resin-coating material according to claim 9. ### Claim 11 (depends on 10) A vehicle wire harness, comprising the insulated wire according to claim 10. ### Claim 12 (depends on 1) A method of producing an insulated wire to be used in a vehicle wire harness, the method comprising a step of extrusion-coating a conductor with the insulating resin composition according to claim 1 to provide a resin composition layer and irradiating the resin composition layer with an electron beam of 80 to 250 kGy. ### Claim 13 (depends on 1) The insulating resin composition according to claim 1, wherein a melting point of component (C) is 60° C. or less. ### Claim 14 (depends on 1) The insulating resin composition according to claim 1, wherein a content of the component (C) is 0.1 to 0.8 parts by mass with respect to 100 parts by mass of the total content of the components (A) and (B).