# US 10,766,213 B2 · Rubber composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,766,213 B2 - Document ID: US10766213B2 - Status: Granted - Kind: B2 - Application number: 15/772,568 - Filed: 2016-11-28 - Published: 2019-03-28 - Granted: 2020-09-08 - Earliest claimed: 2015-11-30 - Assignees: Bridgestone Corporation - Applicants: Bridgestone Corporation - Inventors: Kentaro Kayashima - Web page: https://patentgrep.com/patent/US10766213B2 ## CPC - B29C 73/163: {Sealing compositions or agents, e.g. combined with propellant agents} - B29C 73/16: Auto-repairing or self-sealing arrangements or agents {(incorporating auto-repairing or self-sealing arrangements or agents on or into tyres B29D30/0685)} - B60C 19/12: Puncture preventing arrangements - B60C 19/122: {disposed inside of the inner liner} - C08K 3/22: of metals - C08K 5/01: Hydrocarbons {(C08K5/0091 takes precedence)} - C08K 5/40: Thiurams, {i.e. compounds containing[IMAGE cpc-sch-C08K-1011.gif] groups} - C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers - C08L 23/28: by reaction with halogens or halogen-containing compounds (C08L23/32 takes precedence) - C08K 2003/2296: {of zinc} - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract Provided is a rubber composition for a sealant which can be vulcanized at low temperature and is suitable in a retentivity, an adhering property, followability and a fluidity and which is excellent in a sealing property, wherein the rubber composition is prepared by blending 100 parts by mass of a rubber component containing butyl rubber and/or EPDM, 2 to 10 parts by mass of zinc oxide, 1 to 5 parts by mass of a thiuram vulcanization accelerator, satisfying the thiuram vulcanization accelerator: the zinc oxide=1:1 to 1:3, and 150 parts by mass or more of liquid polybutene or a process oil. ## Claims ### Claim 1 A rubber composition prepared by blending: 100 parts by mass of a rubber component consisting of butyl rubber; 2 to 10 parts by mass of zinc oxide; 1 to 5 parts by mass of a thiuram vulcanization accelerator, satisfying the thiuram vulcanization accelerator: the zinc oxide =1:1 to 1:3; and 150 parts by mass or more of liquid polybutene or a process oil as a plasticizer, satisfying the thiuram vulcanization accelerator: the plasticizer =1:30 to 1:250, wherein the rubber component consists of bromobutyl rubber as the butyl rubber. ### Claim 2 (depends on 1) The rubber composition as described in claim 1, obtained by dynamic cross-linking during kneading. ### Claim 3 (depends on 1) The rubber composition as described in claim 1, obtained by carrying out kneading at 140° C. or lower. ### Claim 4 (depends on 1) The rubber composition as described in claim 1, wherein 4 parts by mass or less of the thiuram vulcanization accelerator is blended. ### Claim 5 (depends on 1) The rubber composition as described in claim 1, wherein 5 parts by mass or less of zinc oxide is blended. ### Claim 6 (depends on 1) The rubber composition as described in claim 1, wherein the thiuram vulcanization accelerator is tetrabenzyl thiuram disulfide. ### Claim 7 (depends on 1) A sealant material prepared by using the rubber composition as described in claim 1. ### Claim 8 (depends on 7) A pneumatic tire prepared by using the sealant material as described in claim 7. ### Claim 9 (depends on 2) The rubber composition as described in claim 2, obtained by carrying out kneading at 140° C. or lower. ### Claim 10 (depends on 2) The rubber composition as described in claim 2, wherein 4 parts by mass or less of the thiuram vulcanization accelerator is blended. ### Claim 11 (depends on 2) The rubber composition as described in claim 2, wherein 5 parts by mass or less of zinc oxide is blended. ### Claim 12 (depends on 2) The rubber composition as described in claim 2, wherein the thiuram vulcanization accelerator is tetrabenzyl thiuram disulfide. ### Claim 13 (depends on 2) The sealant material prepared by using the rubber composition as described in claim 2. ### Claim 14 (depends on 3) The rubber composition as described in claim 3, wherein 4 parts by mass or less of the thiuram vulcanization accelerator is blended. ### Claim 15 (depends on 3) The rubber composition as described in claim 3, wherein 5 parts by mass or less of zinc oxide is blended. ### Claim 16 (depends on 1) The rubber composition as described in claim 1, wherein 1 to 30 parts by mass of carbon black based on 100 part by mass of rubber component is blended as a reinforcing filler. ### Claim 17 (depends on 1) The rubber composition as described in claim 1, wherein an adhesive is blended.