# US 12,180,367 B2 · Polyphenylene sulfide resin composition and molded articles for automobiles manufactured using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,180,367 B2 - Document ID: US12180367B2 - Status: Granted - Kind: B2 - Application number: 18/079,284 - Filed: 2022-12-12 - Published: 2024-01-04 - Granted: 2024-12-31 - Earliest claimed: 2022-06-30 - Assignees: Hyundai Mobis Co., Ltd.; HYUNDAI Advanced Materials Co., Ltd. - Applicants: Hyundai Mobis Co., Ltd.; HYUNDAI Advanced Materials Co., Ltd. - Inventors: Hyoung Taek Kang; Eun Chang Lee; Sang Gil Lee; Kwon Mo Koo; Sang Woon Hwang; Dong Ju Kim - Web page: https://patentgrep.com/patent/US12180367B2 ## CPC - C08L 81/02: Polythioethers; Polythioether-ethers - C08L 81/04: Polysulfides - C08K 2201/003: Additives being defined by their diameter - C08K 2201/004: Additives being defined by their length - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract Disclosed is a polyphenylene sulfide resin composition for an automobile part that includes 30 to 40 parts by weight of a glass fiber, 10 to 20 parts by weight of glass bead, and 5 to 10 parts by weight of a polyolefin resin for each 100 parts by weight of a polyphenylene sulfide resin. ## Claims ### Claim 1 A polyphenylene sulfide resin composition for an automobile part, comprising: 30 to 40 parts by weight of a glass fiber; 10 to 20 parts by weight of glass bead; 5 to 10 parts by weight of a polyolefin resin, for each 100 parts by weight of a polyphenylene sulfide resin; and at least one additive selected from a group consisting of ultraviolet (UV) stabilizers and compatibilizers, wherein the polyolefin resin includes at least one selected from a group consisting of polybutene, polyoctene or polyisoprene, ethylene methylacrylate, and an ethylene-methylacrylate-glycidyl-methacrylate-terpolymer, and wherein a weight average molecular weight of the polyolefin resin ranges from 25,000 to 200,000. ### Claim 2 (depends on 1) The polyphenylene sulfide resin composition of claim 1, wherein the polyphenylene sulfide resin has a melt index in a range of 20 to 30 g/min, corresponding to a measurement of the melt index in accordance with an ISO 1133 Standard at 300° C./5 Kg. ### Claim 3 (depends on 1) The polyphenylene sulfide resin composition of claim 1, wherein the glass fiber has an average diameter of 10 to 11 μm and a length of 3 to 4 mm. ### Claim 4 (depends on 1) The polyphenylene sulfide resin composition of claim 1, wherein the glass bead has an average diameter of 1 to 45 μm. ### Claim 5 (depends on 1) The polyphenylene sulfide resin composition of claim 1, wherein at least one of the glass fiber and the glass bead is surface-treated with a silane coupling agent having at least one of an epoxy group and a glycidyl group. ### Claim 6 (depends on 5) The polyphenylene sulfide resin composition of claim 5, wherein the silane coupling agent includes at least one selected from a group consisting of 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and 3-glycidoxypropyltriethoxysilane. ### Claim 7 (depends on 5) The polyphenylene sulfide resin composition of claim 5, wherein the polyolefin resin comprises a reactive group that binds to the surface-treated at least one of the glass fiber and the glass bead. ### Claim 8 (depends on 7) The polyphenylene sulfide resin composition of claim 7, wherein the reactive group of the polyolefin resin is an epoxy group or glycidyl methacrylate. ### Claim 9 (depends on 1) A molded article for an automobile, manufactured by melt-extruding the polyphenylene sulfide resin composition of claim 1. ### Claim 10 (depends on 9) The molded article of claim 9, wherein the molded article has a tensile strength in a range of 148 to 160 MPa and a weld strength in a range of 47 to 60 MPa, corresponding to respective measurements of the tensile strength and the weld strength in accordance with an ISO 527 Standard test method at 5 mm/min. ### Claim 11 (depends on 9) The molded article of claim 9, wherein the molded article has a dielectric breakdown strength in a range of 16 to 20 kV/mm, corresponding to a measurement of the dielectric breakdown strength in accordance with an IEC 60243-1 Standard test method. ### Claim 12 (depends on 9) The molded article of claim 9, wherein the molded article has a comparative tracking index (CTI) of grades 3 to 4, corresponding to a measurement of the CTI in accordance with an IEC 60112 Standard test method. ### Claim 13 (depends on 9) The molded article of claim 9, wherein the molded article has an elongation of 1.6 to 2%, corresponding to a measurement of the elongation in accordance with an ISO 527 Standard test method. ### Claim 14 (depends on 9) The molded article of claim 9, wherein the molded article has an Izod notched impact strength in a range of 7.5 to 10.0 KJ/m2, corresponding to a measurement of the Izod notched impact strength in accordance with an ISO 180 Standard test method at 23° C. ### Claim 15 (depends on 9) The molded article of claim 9, wherein the molded article has a high-speed surface impact peak force of 190 to 270 N and a break energy in a range of 1.4 to 3.0 J, corresponding to respective measurements of the high-speed surface impact peak force and the break energy in accordance with an ISO 6603 test method. ### Claim 16 (depends on 9) The molded article of claim 9, wherein the molded article is a terminal assembly of a driving motor.