To provide a rubber composition for a pneumatic tire capable of maintaining and improving rubber properties after vulcanization while reducing the amount of metal oxides.SOLUTION: There is provided a rubber composition for a pneumatic tire, which comprises a diene-based rubber, a fatty acid metal salt and a compound described in the following formula (1) (x is an integer of 2 to 12, R contains a sulfur atom and a thiocarbamoyl group having an aromatic hydrocarbon or a fatty acid hydrocarbon, a benzothiazole group having an aromatic hydrocarbon or a fatty acid hydrocarbon or a -SO3-Na+ group) and contains 3 to 30 pts.mass of the fatty acid metal salt and 0.15 to 1.5 pts.mass of the compound described in formula (1) when the total amount of the diene-based rubber is defined as 100 pts.mass and the content of the metal oxides is less than 0.5 pt.mass when the total amount of the diene-based rubber is defined as 100 pts.mass.SELECTED DRAWING: None
【課題】金属酸化物を減量しつつ、加硫後のゴム物性を維持向上可能な空気入りタイヤ用ゴム組成物を提供すること。【解決手段】ジエン系ゴムと、脂肪酸金属塩と、下記式(1)に記載の化合物;【化1】JPEG2024134585000010.jpg17131(xは2~12の整数で、Rは硫黄原子を含み、かつ芳香族炭化水素もしくは脂肪酸炭化水素を有するチオカルバモイル基、芳香族炭化水素もしくは脂肪酸炭化水素を有するベンゾチアゾール基、または-SO3-Na+基を含有する)とを含有し、ジエン系ゴムの全量を100質量部としたとき、脂肪酸金属塩を3~30質量部、式(1)に記載の化合物を0.15~1.5質量部含有し、かつジエン系ゴムの全量を100質量部としたとき、金属酸化物の含有量が0.5質量部未満である空気入りタイヤ用ゴム組成物。【選択図】 なし
RUBBER COMPOSITION FOR PNEUMATIC TIRE AND PNEUMATIC TIRE
空気入りタイヤ用ゴム組成物および空気入りタイヤ
2024-10-04
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 |