Patent ID: 6765063
Filing Date: 2004-07-20
Classification: B60C,C08L,Y10T

Abstract:
A tire having an innerliner of a rubber composition comprised of, based upon 100 parts of rubber (phr);(A) from about 85 to about 95 phr of rubber selected from the group consisting of butyl rubber, butyl rubber halogenated with chlorine, butyl rubber halogenated with bromine and mixtures thereof; (B) about 5 to about 15 phr of a trans 1,4-polybutadiene rubber having a number average molecular weight (Mn) in a range of from about 10,000 to about 50,000, a trans 1,4-content in a range of about 80 to about 85 percent, and a vinyl content of less than 5 percent and wherein said trans 1,4-polybutadiene has two melting point peaks, with a first peak in a range of about 30Â° C. to about 40Â° C. and a second peak in a range of about 40Â° C. to about 50Â° C., as determined by differential scanning calorimeter; (C) from zero to 30 phr of an additional elastomer selected from acrylonitrile/butadiene copolymer, styrene/butadiene copolymer, cis 1,4-polyisoprene natural and/or synthetic rubber and mixtures thereof.