ROOM-TEMPERATURE-CURABLE SILICONE RUBBER COMPOSITION, AND THE USE THEREOF

摘要

A room-temperature-curable silicone rubber composition exhibiting good adhesion to a substrate contacted during curing and capable of suppressing the occurrence of oil bleeding is disclosed. The room-temperature-curable silicone rubber composition comprises: (A) a mixture of (A1) an organopolysiloxane having at least two specified alkoxysilyl-containing groups in the molecular and (A2) an organopolysiloxane having one specified alkoxysilyl-containing group in the molecular; (B) an organopolysiloxane lacking a hydroxyl group and an alkoxy group; (C) an alkoxysilane; and (D) a condensation-reaction catalyst.

主权项

1. A room-temperature-curable silicone rubber composition comprising:
(A) a mixture containing components (A1) and (A2) below: (A1) an organopolysiloxane having in each molecule at least two alkoxysilyl-containing groups represented by general formula:(wherein R1 is the same or different monovalent hydrocarbon group lacking an aliphatic unsaturated bond, R2 is an alkyl group, R3 is the same or different alkylene group, a is an integer from 0 to 2, and p is an integer from 1 to 50) on silicon atoms in the molecular chain;
(A2) an organopolysiloxane having in each molecule one of the above alkoxysilyl-containing groups; (B) an organopolysiloxane lacking a hydroxyl group and an alkoxy group on a silicon atom in the molecular chain; (C) an alkoxysilane represented by general formula:
R4bSi(OR5)(4-b) (wherein R4 is a monovalent hydrocarbon group, R5 is an alkyl group, and b is from 0 to 2) or a partially hydrolyzed condensate thereof; and
(D) a condensation-reaction catalyst;optionally further comprising one or more components selected from:
(E) an adhesion promoter; and (F) a reinforcing filler.