Provided are a rubber composition for tread and a pneumatic tire that have exceptional wear resistance. A rubber composition for tread in which the styrene butadiene rubber content is 10% by mass or higher and the butadiene rubber content is 10% by mass or higher in 100% by mass of a rubber component, the absolute value |deltaHs| of the change in hardness before and after heat aging satisfies formula (1), and the absolute value |delta Swell| of the change in swell before and after heat aging satisfies formula (2). Formula 1: |delta Hs| <= 3.0 Formula 2: |delta Swell| <= 20%.
本公开提供了耐磨性优异的胎面橡胶组合物和充气轮胎。本公开涉及胎面橡胶组合物,其中,以胎面橡胶组合物中橡胶组分为100质量%计,所述胎面橡胶组合物包含10质量%以上的丁苯橡胶和10质量%以上的聚丁二烯橡胶;以及所述胎面橡胶组合物在热老化前后的硬度变化的绝对值|ΔHs|满足以下关系式(1)且在热老化前后的溶胀度变化的绝对值|Δ溶胀度|满足以下关系式(2):|ΔHs|≤3.0(1);|Δ溶胀度|≤20%(2)。
TREAD RUBBER COMPOSITION AND PNEUMATIC TIRE
胎面橡胶组合物和充气轮胎
13.04.2021
Patent
Elektronische Ressource
Chinesisch
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS |