Mercapto group-containing silicone rubber compositions

摘要

Mercapto group-containing silicone rubber compositions essentially consisting of a mercapto group-containing organopolysiloxane having a viscosity exceeding 100,000 cSt and represented by the average unit formula RaSiO(4-a/2) IN WHICH R is a monovalent hydrocarbon group substantially free from aliphatic unsaturation, at least two of the R groups in a molecule being mercaptoalkyl groups and a is between 1.98 and 2.05, a certain filler and sulfur, a metal oxide or a metal peroxide as a curing agent. Products from the composition have excellent chemical and mechanical properties and can be bonded to an organic synthetic rubber or natural rubber as well as metals in completely cured state.