Rubber composition, method of manufacturing a rubber composition and pneumatic tire with such a rubber composition

摘要

The present invention is directed to a rubber composition comprising, based on 100 parts by weight of elastomer (phr):
(A) from 60 to 90 phr of a polymer comprising:
(1) a terminating group provided from a terminating compound
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ X n Si(OR) m R' 4-m-n
wherein X is a chlorine atom, a bromine atom or an iodine atom, R is an alkyl group with from 1 carbon to 7 carbons, R' is a alkyl group with from 1 carbon to 20 carbons, an aryl group, a vinyl group or a halogenated alkyl group, m is an integer from 1 to 4, n is an integer from 0 to 2, and wherein the sum of n and m is from 1 to 4;
(2) repeat units comprising:
(a) a repeat unit provided from a conjugated diolefin monomer, and
(b) a repeat unit provided from an amine monomer;
(B) from 40 to 10 phr of polybutadiene having a microstructure comprising from 96 to 99 percent cis 1,4-isomeric units, from 0.1 to 1 percent trans 1,4-isomeric units and from 1 to 3 percent vinyl 1,2-isomeric units, and
(C) from 50 to 150 phr of silica. It is also directed to a pneumatic tire with such a rubber composition.