COMPOSITION DE CAOUTCHOUC POUR REVETEMENT D'UN CABLE D'UN PNEUMATIQUE

摘要

A rubber composition for coating a tire cord comprising: (A) a reinforced rubber composition comprising vulcanizable rubber including 5 to 100 parts by weight, based on 100 parts by weight of the rubber, of fine short fibers of thermoplastic polymer having group buried therein, said vulcanizable rubber and said thermoplastic polymer being grafted to the vulcanizable rubber through a phenol formaldehyde resin precondensate at an interface of the fiber; (B) a diene rubber; and (C) carbon black, wherein the following conditions (i) to (iv) are satisfied: (i) the amount of the thermoplastic rubber is 1 to 15 parts by weight based on 100 parts by weight of the total amount of the rubber constituents; (ii) the ratio of the rubber is such that the total amount of natural rubber or polyisoprene in the component (A) and the component (B) is 100% to 65% by weight; (iii) the amount of the carbon black is 50 to 70 parts by weight based on 100 parts by weight of the total amount of the rubber constituents; and (iv) the vulcanizate derived from the rubber composition has a 100% modulus of at least 60 kg/cm2.