# US 9,752,649 B2 · Carbon fiber cord for reinforcing rubber product and rubber product 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 9,752,649 B2 - Document ID: US9752649B2 - Status: Granted - Kind: B2 - Application number: 14/762,665 - Filed: 2014-01-27 - Published: 2015-12-24 - Granted: 2017-09-05 - Earliest claimed: 2013-01-30 - Assignees: Nippon Sheet Glass Co., Ltd. - Applicants: Nippon Sheet Glass Company, Limited - Inventors: Shinya Katagiri - Web page: https://patentgrep.com/patent/US9752649B2 ## CPC - F16G 1/10: with textile reinforcement - C08J 5/06: using pretreated fibrous materials - C08L 15/005: {Hydrogenated nitrile rubber} - D02G 3/446: {Yarns or threads for use in automotive applications} - D02G 3/48: Tyre cords {(tyre reinforcements B60C9/00; metal cords for reinforcing rubber or plastic articles D07B1/0606)} - D06M 15/00: Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment (D06M10/00, D06M14/00 take precedence; {treatment with inorganic polyphosphates D06M11/72}) - C08J 2309/02: Copolymers with acrylonitrile - C08J 2321/00: Characterised by the use of unspecified rubbers - D06M 15/41: Phenol-aldehyde or phenol-ketone resins - D06M 15/693: with natural or synthetic rubber, or derivatives thereof - D10B 2101/12: Carbon; Pitch - Y10T 428/2918: including free carbon or carbide or therewith [not as steel] - F16G: BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - D02G: CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS - D06M: TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS - D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present invention provides a carbon fiber cord having both high bending fatigue resistance and high adhesiveness. The disclosed carbon fiber cord is a carbon fiber cord for reinforcing a rubber product. This carbon fiber cord includes a carbon fiber, a first coating layer formed on the carbon fiber, and a second coating layer formed over the first coating layer. The first coating layer contains a phenolic resin and does not contain a rubber component. The second coating layer contains a rubber component. The mass ratio of the first coating layer to the total mass of the carbon fiber and the first coating layer is in a range of 0.5% to 10%. ## Claims ### Claim 1 A carbon fiber cord for reinforcing a rubber product, wherein the cord comprises: a carbon fiber; a first coating layer formed on the carbon fiber; and a second coating layer formed over the first coating layer, wherein the first coating layer contains a phenolic resin and does not contain a rubber component, the second coating layer contains a rubber component and is formed using a treatment agent that contains the rubber component and a crosslinking agent which is at least one of a diisocyanate compound, a polyisocyanate, an aromatic nitroso compound, and a maleimide-based crosslinking agent and does not contain an initial condensate of resorcin and formaldehyde, a mass ratio of the first coating layer to a total mass of the carbon fiber and the first coating layer is in a range of from 0.5% to 10%, and a mass ratio of the second coating layer to a total mass of the carbon fiber, the first coating layer, and the second coating layer is in a range of from 10% to 25%. ### Claim 2 (depends on 1) The carbon fiber cord according to claim 1, wherein the phenolic resin is a copolymer of resorcin, a phenolic compound other than resorcin, and formaldehyde. ### Claim 3 (depends on 2) The carbon fiber cord according to claim 2, wherein the phenolic compound is parachlorophenol or phenol. ### Claim 4 (depends on 1) The carbon fiber cord according to claim 1, wherein the second coating layer contains hydrogenated nitrile rubber. ### Claim 5 (depends on 1) A rubber product comprising the carbon fiber cord according to claim 1. ### Claim 6 (depends on 1) The carbon fiber cord according to claim 1, wherein the crosslinking agent comprises a diisocyanate compound. ### Claim 7 (depends on 1) The carbon fiber cord according to claim 1, wherein the crosslinking agent comprises a polyisocyanate. ### Claim 8 (depends on 1) The carbon fiber cord according to claim 1, wherein the crosslinking agent comprises an aromatic nitroso compound. ### Claim 9 (depends on 1) The carbon fiber cord according to claim 1, wherein the crosslinking agent comprises a maleimide-based crosslinking agent. ### Claim 10 (depends on 4) The carbon fiber cord according to claim 4, wherein the crosslinking agent comprises a diisocyanate compound. ### Claim 11 (depends on 4) The carbon fiber cord according to claim 4, wherein the crosslinking agent comprises a polyisocyanate. ### Claim 12 (depends on 4) The carbon fiber cord according to claim 4, wherein the crosslinking agent comprises an aromatic nitroso compound. ### Claim 13 (depends on 4) The carbon fiber cord according to claim 4, wherein the crosslinking agent comprises a maleimide-based crosslinking agent. ### Claim 14 (depends on 4) The carbon fiber cord according to claim 4, wherein the hydrogenated nitrile rubber comprises a carboxylated hydrogenated nitrile rubber. ### Claim 15 (depends on 1) The carbon fiber cord according to claim 1, wherein the cord further comprises a third coating layer formed over the second coating layer. ### Claim 16 (depends on 1) The carbon fiber cord according to claim 1, wherein the mass ratio of the second coating layer to the total mass of the carbon fiber, the first coating layer, and the second coating layer is in a range of from 13% to 19%. ### Claim 17 (depends on 15) The carbon fiber cord according to claim 15, wherein a mass ratio of the third coating layer to a total mass of the carbon fiber, the first coating layer, the second coating layer, and the third coating layer is in a range of from 0.5% to 8%. ### Claim 18 (depends on 15) The carbon fiber cord according to claim 15, wherein a mass ratio of the third coating layer to a total mass of the carbon fiber, the first coating layer, the second coating layer, and the third coating layer is in a range of from 1.0% to 5.0%. ### Claim 19 (depends on 15) The carbon fiber cord according to claim 15, wherein a mass ratio of the third coating layer to a total mass of the carbon fiber, the first coating layer, the second coating layer, and the third coating layer is in a range of from 1.8% to 3.8%.