# US 5,703,151 A · Rubber composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,703,151 A - Document ID: US5703151A - Status: Granted - Kind: A - Application number: 08/632,798 - Filed: 1996-04-17 - Granted: 1997-12-30 - Earliest claimed: 1995-04-17 - Assignees: Sumitomo Chemical Company, Limited - Inventors: Keisaku Yamamoto; Kizuku Wakatsuki; Hayato Saba - Web page: https://patentgrep.com/patent/US5703151A ## CPC - C08K 3/36: Silica - C08K 3/34: Silicon-containing compounds - C08L 9/00: Compositions of homopolymers or copolymers of conjugated diene hydrocarbons - C08L 9/06: Copolymers with styrene - C08L 21/00: Compositions of unspecified rubbers - C08L 71/00: Compositions of polyethers obtained by reactions forming an ether link in the main chain (of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06); Compositions of derivatives of such polymers - Y02T 10/86: Optimisation of rolling resistance, e.g. weight reduction - 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) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract Provided is a rubber composition obtainable by kneading a mixture at a maximum temperature between about 120.degree. to about 170.degree. C. The mixture includes: 100 parts by weight of a solution polymerized diene rubber; about 5 to about 100 parts by weight of silica; about 1 to about 15 parts by weight of a silane coupling agent; and about 1 to about 15 parts by weight of a polyalkylene glycol having a weight average molecular weight of about 200 to about 20,000. The invention also provides a method for making the rubber composition, a tire tread made from the rubber composition, and a tire made from the rubber composition. ## Claims ### Claim 1 A rubber composition obtainable by kneading a mixture at a maximum temperature between about 120.degree. to about 170.degree. C., said mixture comprising: 100 parts by weight of a solution-polymerized styrene-butadiene rubber having a Mooney viscosity (ML.sub.1+4 125.degree. C.) in a range of from about 40 to about 140; about 5 to about 100 parts by weight of silica; about 1 to about 15 parts by weight of a silane coupling agent; and about 1 to about 15 parts by weight of a polyalkylene glycol having a weight average molecular weight of about 200 to about 20,000. ### Claim 2 (depends on 1) The rubber composition according to claim 1, said silane coupling agent is at least one selected from the group consisting of the compounds represented by the following formulae (1) and (2): ›(OR).sub.3 SiC.sub.a H.sub.2a !.sub.2 S.sub.b ( 1) (OR).sub.3 SiC.sub.a H.sub.2a Z (2) wherein, R represents a methyl group or an ethyl group; a represents an integer of 1 to about 6; b represents an integer of 1 to about 6; and Z represents a mercapto group, an epoxy group, a vinyl group or an amino group. ### Claim 3 (depends on 1) The rubber composition according to claim 1, wherein said rubber composition exhibits the combination of properties of: (1) improved wet-skid resistance; (2) improved rolling resistance; and (3) improved processability when suitably vulcanized. ### Claim 4 A process for producing a rubber composition which comprises the steps of: kneading a mixture comprising: 100 parts by weight of a solution-polymerized styrene-butadiene rubber having a Mooney viscosity (ML.sub.1+4 125.degree. C.) in a range of from about 40 to about 140; about 5 to about 100 parts by weight of silica; about 1 to about 15 parts by weight of a silane coupling agent; and about 1 to about 15 parts by weight of a polyalkylene glycol having a weight average molecular weight of about 200 to about 20,000, at a temperature in which the maximum temperature during the kneading is between about 120.degree. and about 170.degree. C. ### Claim 5 A tire tread comprising a vulcanized rubber composition having the combination of properties of: (1) improved wet-skid resistance; (2) improved rolling resistance; and (3) improved processability when suitably vulcanized, wherein said rubber composition being obtainable by kneading a mixture at a maximum temperature between about 120.degree. to about 170.degree. C., said mixture comprising: 100 parts by weight of a solution-polymerized styrene-butadiene rubber having a Mooney viscosity (ML.sub.1+4 125.degree. C.) in a range of from about 40 to about 140; about 5 to about 100 parts by weight of silica; about 1 to about 15 parts by weight of a silane coupling agent; and about 1 to about 15 parts by weight of a polyalkylene glycol having a weight average molecular weight of about 200 to about 20,000. ### Claim 6 (depends on 4) A tire comprising the tire tread according to claim 4. ### Claim 7 (depends on 1) The rubber composition according to claim 1, wherein the Mooney viscosity is in a range of from about 50 to about 120. ### Claim 8 (depends on 4) The process according to claim 4, wherein the Mooney viscosity is in a range of from about 50 to about 120. ### Claim 9 (depends on 5) The tire tread according to claim 5, wherein the Mooney viscosity is in a range of from about 50 to about 120.