# US 11,306,250 B2 · Surface protection composition and terminal fitted electric wire > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,250 B2 - Document ID: US11306250B2 - Status: Granted - Kind: B2 - Application number: 16/892,998 - Filed: 2020-06-04 - Published: 2020-12-24 - Granted: 2022-04-19 - Earliest claimed: 2019-06-21 - Assignees: Autonetworks Technologies, Ltd.; Sumitomo Wiring Systems, Ltd.; Sumitomo Electric Industries, Ltd.; Kyushu University, National University Corporation - Applicants: Autonetworks Technologies, Ltd.; Sumitomo Wiring Systems, Ltd.; Sumitomo Electric Industries, Ltd.; Kyushu University, National University Corporation - Inventors: Naoyuki Oshiumi; Takehiro Hosokawa; Makoto Mizoguchi - Web page: https://patentgrep.com/patent/US11306250B2 ## CPC - C09K 15/32: containing {two or more of} boron, silicon, phosphorus, selenium, tellurium or a metal - H01B 3/20: liquids, e.g. oils (silicone oils H01B3/46) - H01R 4/70: Insulation of connections (end caps H01R4/22) - H01B 7/2806: {Protection against damage caused by corrosion} - H01R 4/185: {combined with a U-shaped insulation-receiving portion} - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE - 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}) - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS ## Abstract Provided is a surface protection composition excellent in anticorrosion property for preventing metal corrosion as well as excellent in uniform applicability and heat resistance, and a terminal-fitted electric wire treated with the composition. The surface protection composition contains a phosphorus compound (a) represented by the general formula (1) in an amount of 0.1 to 10 mass % in terms of phosphorus element with respect to the total amount of the composition, at least one selected from the group consisting of a phosphorus compound (b1) represented by the general formula (2) and a carboxylic acid compound (b2) represented by the general formula (3) in an amount of 5.0 to 60 mass % with respect to the total amount of the composition, a metal-containing compound (c) in an amount of 0.1 to 10 mass % in terms of metal element with respect to the total amount of the composition, and a lubricant base oil (d). ## Claims ### Claim 1 A surface protection composition comprising: a phosphorus compound (a) represented by the general formula (1) in an amount of 0.1 to 10 mass % in terms of phosphorus element with respect to the total amount of the composition; at least one selected from the group consisting of a phosphorus compound (b1) represented by the general formula (2) and a carboxylic acid compound (b2) represented by the general formula (3) in an amount of 5.0 to 60 mass % with respect to the total amount of the composition; a metal-containing compound (c) in an amount of 0.1 to 10 mass % in terms of metal element with respect to the total amount of the composition; and a lubricant base oil (d), wherein the composition does not contain a consistency improver which gels with the lubricant base oil (d), and the general formula (1) is: where R1 represents a hydrogen atom, R2 represents a hydrocarbon group with 4 to 30 carbon atoms having one or more branched chains or one or more carbon-carbon double bonds, and R3 represents a hydrogen atom or a hydrocarbon group with 4 to 30 carbon atoms; where R4 represents a hydrogen atom, R5 represents a linear hydrocarbon group with 12 to 22 carbon atoms, and R6 represents a hydrogen atom or a hydrocarbon group with 12 to 22 carbon atoms; R7—COOH (3) where R7 represents a linear hydrocarbon group with 11 to 21 carbon atoms, and the lubricant base oil (d) has a kinematic viscosity of 10 mm2/s or higher at 100° C. and a number-average molecular weight of 400 or higher. ### Claim 2 (depends on 1) The surface protection composition according to claim 1, wherein a mass ratio (a):{(b1)+(b2)} of the compound (a) to the total of the compound (b1) and the compound (b2) is within a range of 5:95 to 95:5. ### Claim 3 (depends on 2) The surface protection composition according to claim 2, wherein a metal in the compound (c) is at least one selected from the group consisting of alkali metals, alkaline earth metals, aluminum, titanium, and zinc. ### Claim 4 (depends on 3) The surface protection composition according to claim 3, wherein the lubricant base oil (d) is contained in the composition in an amount of 5.0 to 90 mass % with respect to the total amount of the composition. ### Claim 5 (depends on 4) The surface protection composition according to claim 4, wherein the lubricant base oil (d) has a kinematic viscosity in the range of from 10 mm2/s to 150 mm2/s at 100° C. and a number-average molecular weight in the range of from 400 to 10000. ### Claim 6 (depends on 5) A terminal-fitted electric wire comprising: a terminal; an electric conductor; and an electric connection part formed between the terminal and the electric conductor, covered with the surface protection composition according to claim 5. ### Claim 7 (depends on 1) The surface protection composition according to claim 1, wherein a metal in the compound (c) is at least one selected from the group consisting of alkali metals, alkaline earth metals, aluminum, titanium, and zinc. ### Claim 8 (depends on 1) The surface protection composition according to claim 1, wherein the lubricant base oil (d) is contained in the composition in an amount of 5.0 to 90 mass % with respect to the total amount of the composition. ### Claim 9 (depends on 1) The surface protection composition according to claim 1, wherein the lubricant base oil (d) has a kinematic viscosity of 15 mm2/s or higher at 100° C. and a number-average molecular weight of 450 or higher. ### Claim 10 (depends on 1) A terminal-fitted electric wire comprising: a terminal; an electric conductor; and an electric connection part formed between the terminal and the electric conductor, covered with the surface protection composition according to claim 1. ### Claim 11 A surface protection composition comprising: a phosphorus compound (a) represented by the general formula (1) in an amount of 0.1 to 10 mass % in terms of phosphorus element with respect to the total amount of the composition; at least one selected from the group consisting of a phosphorus compound (b1) represented by the general formula (2) and a carboxylic acid compound (b2) represented by the general formula (3) in an amount of 5.0 to 60 mass % with respect to the total amount of the composition; a metal-containing compound (c) in an amount of 0.1 to 10 mass % in terms of metal element with respect to the total amount of the composition; and a lubricant base oil (d); wherein the composition does not contain an amide compound, and the general formula (1) is: where R1 represents a hydrogen atom, R2 represents a hydrocarbon group with 4 to 30 carbon atoms having one or more branched chains or one or more carbon-carbon double bonds, and R3 represents a hydrogen atom or a hydrocarbon group with 4 to 30 carbon atoms; where R4 represents a hydrogen atom, R5 represents a linear hydrocarbon group with 12 to 22 carbon atoms, and R6 represents a hydrogen atom or a hydrocarbon group with 12 to 22 carbon atoms; R7—COOH (3) where R7 represents a linear hydrocarbon group with 11 to 21 carbon atoms, and the lubricant base oil (d) has a kinematic viscosity of 10 mm2/s or higher at 100° C. and a number-average molecular weight of 400 or higher. ### Claim 12 (depends on 11) A terminal-fitted electric wire comprising: a terminal; an electric conductor; and an electric connection part formed between the terminal and the electric conductor, covered with the surface protection composition according to claim 11.