Rubber compositions for use in tires, comprising a (white...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

Reexamination Certificate

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Details

C524S262000, C524S269000, C524S265000, C524S492000, C524S444000, C524S437000, C525S331900, C152S209100

Reexamination Certificate

active

07078449

ABSTRACT:
The present invention is directed to a rubber composition comprising a diene elastomer, a reinforcing white filler, and a (white filler/elastomer) coupling agent, which is bifunctional and which can be bonded to the elastomer by means of a function X. The coupling agent X function is an ester function of an unsaturated α-β acid bearing a carbonyl group on its γ position and having the general formula (X):where R, R1and R2may be the same or different, where R is a monovalent hydrocarbon radical, and where R1and R2may be a hydrogen atom or a monovalent hydrocarbon radical. The rubber composition of the present invention is useful for the manufacture of tires or semi-finished products for tires, such as tire treads.

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