METHOD FOR PRODUCING SILICONE RUBBER COMPOUND AND SILICONE RUBBER COMPOSITION

摘要

A method for producing a silicone rubber compound in a reduced blending time and which imparts excellent resistance to plasticity reversion, and the cured silicone rubber prepared without heat treatment has excellent resistance to compression set. The method comprises mixing components: (A) an organopolysiloxane having a polymerization degree of at least 100 represented by the following average compositional formula (I):; R¹_aSiO_(4−a)/2   (I);wherein R¹ is independently a substituted or unsubstituted monovalent hydrocarbon group, and a is 1.95 to 2.05; (B) a reinforcing silica having a specific surface area as measured by BET absorption method of at least 50 m²/g,(C) an alkoxysilane represented by the following formula (II):; R²_mSi(OR³)_4−m   (II);wherein R² is independently hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group, R³ is independently a substituted or unsubstituted alkyl group, and m is 0, 1, 2, or 3, and (D) water, and the heat treatment.