Foamable siloxane compositions and silicone foams prepared therefrom

U.S. Patent Number: 5733946

Abstract: Foamable organosiloxane compositions which yield, upon cure, silicone foams having low density and decreased 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; (D) a silicone resin copolymer; and optionally (E) a blowing agent; and silicone foams prepared therefrom. A method of weather-stripping a door or window using a silicone foam so prepared.

Inventors: Loiselle; Brian Paul (Midland, MI); Rapson; Lawrence Joseph (Bay City, MI)

Assignee: Dow Corning Corporation (Midland, MI)

Application Number: 08/848,710

Issued: 1998-03-31

Expired: 2006-03-31

Classes: 521/134 ; 427/244; 427/373; 521/154

Field of search: 427/244,373 521/134,154

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