The present invention provides a rubber composition for a tire having improved workability and abrasion resistance. A rubber composition for a tire according to the present invention comprises: a polybutadiene which has: (A) a Mooney viscosity (ML 1+4,100°C ) being 43 or more; (B) a ratio (Tcp/ML 1+4,100°C ) of 5 wt% toluene solution viscosity (Tcp) to Mooney viscosity (ML 1+4,100°C ) being 0.9 to 2.3; (C) a stress relaxation time (T80) being 10.0 to 40.0 seconds, which is a time until a torque is attenuated by 80% when the torque at the end of ML 1+4,100°C measurement is 100%; and (D) a molecular weight distribution (Mw/Mn) being 2.50 to 4.00; another rubber (ii); and a rubber reinforcing material (iii).
RUBBER COMPOSITION FOR TIRES
KAUTSCHUKZUSAMMENSETZUNG FÜR REIFEN
COMPOSITION DE CAOUTCHOUC POUR PNEUS
2020-04-01
Patent
Electronic Resource
English
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / C08F MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS , Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind |
RUBBER COMPOSITION FOR TIRES, VULCANIZED RUBBER COMPOSITION FOR TIRES, AND TIRE
European Patent Office | 2023
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