Provided is a rubber composition for a tire with which it is possible to obtain a tire having excellent wet gripping on both dense graded asphalt paving and porous asphalt paving and having high road surface robustness. The tire rubber composition contains a rubber component including an isoprene-based rubber (A) having a glass-transition temperature of -50°C or lower, a reinforcing filler (B), and a resin component (C). The proportion constituted by the isoprene-based rubber (A) in 100 parts by mass of rubber component is not less than 15 and less than 50 parts by mass. The resin component (C) is at least partially hydrogenated and has an SP value difference with the isoprene-based rubber (A) of 1.40 (cal/cm3)1/2 or less. A composition parameter P1 calculated by a specific formula (I-1) is 1,000 or more, and a composition parameter P2 calculated by a specific formula (I-2) is 0.25 or more.
TIRE RUBBER COMPOSITION, TREAD RUBBER, AND TIRE
REIFENKAUTSCHUKZUSAMMENSETZUNG, LAUFFLÄCHENKAUTSCHUK UND REIFEN
COMPOSITION DE CAOUTCHOUC POUR PNEU, CAOUTCHOUC DE BANDE DE ROULEMENT ET PNEU
09.04.2025
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 |
Europäisches Patentamt | 2021
|Europäisches Patentamt | 2021
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