To provide a rubber composition for sealant that has excellent fracture characteristics, has excellent sealability after long-term deterioration, and also prevents the fracture characteristics from deteriorating with time, and a pneumatic tire (sealant tire) prepared using the same.SOLUTION: A rubber composition for sealant contains, relative to 100 pts.mass of a butyl rubber, zinc oxides of 2-15 pts.mass and liquid polymers of 100-300 pts.mass. Relative to the butyl rubber 100 pts.mass, a thiuram-based vulcanization accelerator, a dithiocarbamic acid-based vulcanization accelerator, and sulfur are 0.1 pt.mass or less, respectively.SELECTED DRAWING: Figure 4
【課題】 破壊特性に優れ、経年劣化後の良好なシール性を有し、破壊特性の経時変化も抑制できるシーラント材用ゴム組成物、及びこれを用いた空気入りタイヤ(シーラントタイヤ)を提供する。【解決手段】 ブチル系ゴム100質量部に対して、酸化亜鉛を2~15質量部、液状ポリマーを100~300質量部含み、ブチル系ゴム100質量部に対して、チウラム系加硫促進剤、ジチオカルバミン酸系加硫促進剤、硫黄の含有量がそれぞれ0.1質量部以下であるシーラント材用ゴム組成物。【選択図】図4
RUBBER COMPOSITION FOR SEALANT, AND PNEUMATIC TIRE
シーラント材用ゴム組成物、空気入りタイヤ
2022-03-10
Patent
Elektronische Ressource
Japanisch
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B29C Formen oder Verbinden von Kunststoffen , SHAPING OR JOINING OF PLASTICS / 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 |