Butyl rubber composition

摘要

A butyl rubber composition, which comprises 100 parts by weight of butyl rubber and 30 to 150 parts by weight of carbon black having a CTAB specific surface area of 30 to 100 m2/g and preferably further contains 10 to 100 parts by weight of a flat filler having an average particle size of 1 to 40 mum and an aspect ratio of 5 or more and 0.05 to 5 parts by weight of a coupling agent of organometallic compound is provided. The butyl rubber composition can give vulcanization molded products capable of effectively sealing a carbondioxide refrigerant without generation of blisters, etc therein.