Foamable siloxane compositions and silicone foams prepared therefrom

摘要

Foamable organosiloxane compositions which yield, upon cure, silicone foams having low density and decrease friability, comprising (A) a siloxane base polymer system which is a combination of a high molecular weight hydroxyl-group containing siloxane polymer and a low molecular weight hydroxyl-group containing siloxane polymer; (B) a silicon-containing crosslinker for the siloxane base polymer system, wherein the crosslinker contains at least two -SiH groups per molecule; (C) a platinum group catalyst; and optionally (D) a silicone resin copolymer or (E) a blowing agent; and silicone foams prepared therefrom. A method of weather-stripping a door or window using the silicone foam so prepared.