An object of the present invention is to provide: a rubber composition for a tire having a low viscosity and an excellent workability, and exhibiting an excellent wet performance and low rolling resistance, when formed into a tire; and a pneumatic tire using the rubber composition for a tire. The rubber composition for a tire of the present invention contains diene-based rubber and silica. The diene-based rubber contains natural rubber and specific conjugated diene-based rubber. The content of the natural rubber in the diene-based rubber is 30 to 45 mass%. The content of the specific conjugated diene-based rubber in the diene-based rubber is 30 to 70 mass%. The specific conjugated diene-based rubber is conjugated diene-based rubber produced according to a specific production method. In the conjugated diene-based rubber, the aromatic vinyl unit content, the vinyl bond content, and the weight average molecular weight are within a predetermined range. The CTAB adsorption specific surface area of the silica is 180 m 2 /g or greater. The content of the silica is less than 60 parts by mass per 100 parts by mass of the diene-based rubber.
TIRE RUBBER COMPOSITION AND PNEUMATIC TIRE
REIFENKAUTSCHUKZUSAMMENSETZUNG UND LUFTREIFEN
COMPOSITION DE CAOUTCHOUC POUR PNEU ET PNEUMATIQUE
2019-03-13
Patent
Elektronische Ressource
Englisch
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS |