Patent ID: 6489402
Filing Date: 2002-12-03
Classification: C08K,C08L,F16F

Abstract:
A rubber vibration insulator which has a durometer hardness (JIS K62531) of not greater than A15, an Asker-C hardness of at least 10, a compression set (JIS K6262 measured at 70Â° C. for 24 hrs) of not greater than 20% and a loss tangent measured at 25Â° C. at 30 Hz of at least 0.1, which insulator is obtained by curing by compression press molding a rubber composition comprising 100 parts by weight of a partially crosslinked butyl rubber, 0 to 100 parts by weight of a processability-improving polymer per 100 parts by weight of said partially crosslinked butyl rubber and 64.7 to 126.3 parts by weight of an extender component per 100 parts by weight of said partially crosslinked butyl rubber as well as a vulcanizing agent.