The present invention provides: a rubber composition for a tire tread for winter which is excellent in wet performance and performance on icy and snowy roads when used in a tire; and a pneumatic tire for winter including the rubber composition. The present invention relates to a rubber composition for a tire tread for winter, containing: a conjugated diene rubber containing 30 mass% or greater of a specific conjugated diene rubber; a plasticizer containing a specific plasticizer; silica; and a silane coupling agent, a content of the specific plasticizer being 5 parts by mass or greater per 100 parts by mass of the conjugated diene rubber; a content of the silica being 30 parts by mass or greater per 100 parts by mass of the conjugated diene rubber; a content of the silane coupling agent being from 3 to 30 mass% with respect to the content of the silica; the specific plasticizer being a plasticizer having a glass transition temperature of -50°C or lower; and an average glass transition temperature of the conjugated diene rubber and the plasticizer being lower than -50°C.
RUBBER COMPOSITION FOR TIRE TREAD FOR WINTER AND PNEUMATIC TIRE FOR WINTER
KAUTSCHUKMISCHUNG FÜR WINTERREIFENPROFIL UND LUFTREIFEN FÜR DEN WINTER
COMPOSITION DE CAOUTCHOUC POUR BANDE DE ROULEMENT DE PNEU POUR L'HIVER, ET PNEU HIVER
2021-03-24
Patent
Electronic Resource
English
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / C08C TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS , Behandlung oder chemische Modifizierung von Kautschuken / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS |
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