RUBBER COMPOSITION CONTAINING STYRENE/BUTADIENE ELASTOMER AND SILICA REINFORCEMENT AND TIRE

• Main Authors: KERNS, Michael Lester, HAHN, Bruce Raymond, WONG, Tang Hong, ATTAREB, Gamil Gamal, KARAS BURKE, Karen, PAPAKONSTANTOPOULOS, George Jim
• Format: Patent
• Language: English; French; German
• Published: 26.12.2018
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DEVICES OR ARRANGEMENTS RELATED TO TYRES; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TYRE CHANGING OR REPAIRING; TYRE INFLATION; VEHICLE TYRES; VEHICLES IN GENERAL

A rubber composition is disclosed containing, based on parts by weight per 100 parts by weight of the rubber (phr), (A) conjugated diene-based elastomers comprising: (1) from 40 to 90 phr, alternately 60 to 80 phr, of a styrene/butadiene elastomer having a molecular weight profile comprising a weight average molecular weight (Mw) in a range of from 500,000 to 800,000, with the low molecular weight content having a weight average molecular weight (Mw) of up to 150,000 being limited to a maximum of seven weight percent of the styrene/butadiene elastomer, and (2) from 60 to 10 phr of at least one additional conjugated diene-based elastomer; (B) from 40 to 150 phr of a filler comprising a combination of carbon black and silica together with a coupling agent having a moiety reactive or interactive with hydroxyl groups on the silica and another different moiety reactive or interactive with the diene-based elastomers. Also, a tire comprising this rubber composition is disclosed.