Modified silicon elastomers having improved flex life and method therefor

摘要

A silicone elastomer having improved flex life and a method of improving the flex life of silicone elastomers having olefinic unsaturation is described. The flex life of silicone elastomers having olefinic unsaturation is improved substantially by mixing vinyl acetate ethylene copolymer with the silicone elastomer in the presence of a free radical catalyst at an elevated temperature. In a preferred embodiment, methyl vinyl silicone rubber is mixed with vinyl acetate copolymer in the presence of dicumyl peroxide at an elevated temperature to provide a silicone elastomer having improved flex life.