Patent ID: 6204322
Filing Date: 2001-03-20
Classification: C08C,C08K,Y10T

Abstract:
A tire tread having a base of a coupled and/or starred diene polymer, characterized by the fact that it comprises 10 to 100 parts by weight of a sulfur-vulcanizable rubber composition comprising silica as reinforcing filler and a coupled and/or starred polymer comprising 30% to 100% of chains coupled and/or starred by means of an agent having the general formula:(Y).sub.m --R.sup.1 --Si(OR.sup.2).sub.3-n --R.sup.3 n in whichY represents the radical ##STR3##R.sup.1 represents an alkyl, cycloalkyl or aryl radical having 1 to 10 carbon atoms,R.sup.2 represents a methyl or ethyl radical,R.sup.3 represents an alkyl, aryl or alkaryl radical having from 1 to 12 carbon atoms,R.sup.4 represents a hydrocarbon radical having from 1 to 6 carbon atoms and may comprise one or more oxygen atoms in the hydrocarbon chain,n is whole number selected from among the values 0 and 1,m is whole number selected from among the values 1 and 2,p and q are whole numbers selected from among the values 0, 1, 2, 3, and 4, it being understood that the sum of p+q must represent a whole number between 2 and 5 inclusive.