Improvement in the compositions of silicone rubber catalysed by platinum

摘要

A platinum catalyzed silicone rubber composition with an improved work life having as its base constituents 100 parts of a vinyl-containing polysiloxane where the vinyl concentration is at least 0.005 mole percent, at least 0.1 parts per million of a platinum catalyst and from 1 to 50 parts based on 100 parts of the vinyl-containing polysiloxane of a hydrogen-containing polysiloxane and further having as an inhibitor additive a compound with at least one radical of the formula, -C-O-O-H The preferred inhibitor compounds containing the hydroperoxy radical are tertiary butyl hydroperoxide, methylethylketone hydroperoxide, cumene hydroperoxide, 1,1,3,3,-tetramethylbutyl hydroperoxide and 2,5-dimethyl-2,5-dihydroperoxyhexane.