Patent ID: 6255397
Filing Date: 2001-07-03
Classification: B60C,C08L,Y10S

Abstract:
A rubber composition comprised of, based upon 100 parts by weight per 100 parts by weight elastomers (phr) (A) 100 parts by weight of (i) about 30 to about 70 phr of cis 1,4-polybutadiene rubber and (ii) from zero to about 30 phr of cis 1,4-polyisoprene rubber, (B) about 2 to about 30 phr of liquid hydroxyl terminated polyalkylene polymer selected from the group consisting of at least one of (i) mono-hydroxyl terminated polymers with primary hydroxyl groups and (ii) di-hydroxyl terminated polymers with primary hydroxyl groups; wherein the alkylene mer units of said liquid polymer contains from 2 to 5 carbon atoms, (C) about 30 to about 70 phr of brominated copolymer of isobutylene and p-methylstyrene, and (D) reinforcing filler comprised of about 15 to about 70 phr of carbon black reinforcing filler and from zero to 20 phr of amorphous silica.