Patent ID: 6201054
Filing Date: 2001-03-13
Classification: B60C,C08L

Abstract:
A rubber composition for tire treads comprising; a polymer containing not less than 30% by weight of a brominated isobutylene/paramethylstyrene copolymer, wet silica having a BET specific surface area of 100 to 250 m.sup.2 /g after allowed to stand at 150.degree. C. for 0.5 hour in nitrogen atmosphere in an amount of 50 to 200 parts by weight on the basis of 100 parts by weight of the polymer, and a silane compound, in an amount corresponding to 1 to 15% by weight based on the wet silica, which is represented by the formula (1): Z--R--S.sub.n --R--Z, (2): Z--R--SH, (3): Z--R--NH.sub.3, (4) Z--CH.dbd.CH.sub.2 or (5) Z--R--X in which R is a divalent hydrocarbon radical having 1 to 18 carbon atoms, n is an integer of 2 to 8, Z is --Si(R.sup.1).sub.2 R.sup.2, --SiR.sup.1 (R.sup.2).sub.2 or --Si(R.sup.2).sub.3 provided that R.sup.1 is alkyl having 1 to 4 carbon atoms, cyclohexyl or phenyl, R.sup.2 is alkoxyl having 1 to 8 carbon atoms, cycloalkoxyl having 5 to 8 carbon atoms or aryloxy having 6 to 8 carbon atoms and X is halogen atom.