Coupling agents for vulcanizable mixtures of unsaturated rubbers and silicon-containing fillers

摘要

A coupling agent for vulcanizable mixtures of rubbers and mineral fillers which is the reaction product of a 2(3)-chloroacetoxy-5-(2'-trialkoxysilyethyl)norbornane of the formula: <IMAGE> (I) wherein R1 is methyl and/or ethyl, with a thiosulfonic acid salt of the formula: R2-SO2SMe (II) wherein R2 is a (cyclo)aliphatic or aromatic hydrocarbon radical having up to 20 carbon atoms, and Me is sodium or potassium.