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RUBBER COMPOSITION EXCELLENT IN DISCOLORATION RESISTANCE AND FLEX CRACKING RESISTANCE PERFORMANCE AND PNEUMATIC TIRE HAVING SIDEWALL COMPRISED OF THE SAME
RUBBER COMPOSITION EXCELLENT IN DISCOLORATION RESISTANCE AND FLEX CRACKING RESISTANCE PERFORMANCE AND PNEUMATIC TIRE HAVING SIDEWALL COMPRISED OF THE SAME
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机译:橡胶组合物具有出色的耐脱色性和耐弯曲龟裂性能,并且具有包含相同侧壁的气胎
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摘要
PROBLEM TO BE SOLVED: To provide a rubber composition which is enhanced in weather resistance/discoloration resistance and flex cracking resistance performances, and a pneumatic tire having a sidewall comprised of the rubber composition.;SOLUTION: The rubber composition comprises 40-75 wt% of a diene rubber and, dispersed therein, 25-60 wt% of at least one butyl rubber selected from the group consisting of a butyl rubber, a halogenated butyl rubber and a rubber obtained by halogenating a copolymer of a 4-7C isomonoolefin with a para-alkylstyrene and is obtained by dynamically crosslinking them by adding 0.05-5 pts. wt. of an amine compound together with a dynamic crosslinking agent to 100 pts. wt. of the rubber components, kneading the resultant mixture and discharging at a temperature of 140°C or higher. The pneumatic tire has the sidewall comprised of the rubber composition.;COPYRIGHT: (C)2005,JPO&NCIPI
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