Patent ID: 8637599

Claim:
A rubber composition for an inner liner including: 10 to 50 parts by weight of (B) mica having an aspect ratio of 25 to 100 and an average particle diameter of 25 to 100 μm, 5 to 35 parts by weight of a compatibilizer based on 100 parts by weight of the (B) mica, 20 to 39 parts by weight of (C) carbon black and/or silica, 0.2 to 10 parts by weight of (D) an alkylphenol-sulfur chloride condensate indicated by the formula (D1): wherein R 1 to R 3 are the same or different, either is an alkyl group having 6 to 9 carbons; x and y are the same or different, and either is an integer of 2 to 4; and n is an integer of 0 to 10, and 0.2 to 1.2 parts by weight of sulfur, based on 100 parts by weight of (A) a rubber component consisting of 30 to 80% by weight of a butyl rubber and 20 to 70% by weight of a natural rubber and/or an isoprene rubber.