To provide a tire rubber composition that can achieve both of ozone resistance and appearance performance in a wide range of environmental temperatures, and a pneumatic tire made with the rubber composition.SOLUTION: A tire rubber composition contains a wax in which the total content (A) of C23-32 normal alkanes is 40 mass% or more and the total content (B) of C33-40 normal alkanes is 30 mass% or less, with A/B of 25 or less, and a surfactant with an HLB value of 6-18 and a weight average molecular weight of 3800 or less.SELECTED DRAWING: None
【課題】広い環境温度域での耐オゾン性能と外観性能を両立できるタイヤ用ゴム組成物、及び該ゴム組成物を用いて作製した空気入りタイヤを提供する。【解決手段】炭素数23〜32の各ノルマルアルカンの合計含有率(A)が40質量%以上、炭素数33〜40の各ノルマルアルカンの合計含有率(B)が30質量%以下、かつA/Bが25以下であるワックスと、HLB値が6〜18、かつ重量平均分子量が3800以下である界面活性剤とを含む、タイヤ用ゴム組成物。【選択図】なし
TIRE RUBBER COMPOSITION AND PNEUMATIC TIRE
タイヤ用ゴム組成物及び空気入りタイヤ
2019-06-13
Patent
Electronic Resource
Japanese
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 |