C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/3009, 400/41
C08L 83/12 (2006.01) C08L 83/04 (2006.01)
Patent
CA 1163393
60SI-398 IMPROVED ROOM TEMPERATURE VULCANIZABLE SILICONE RUBBER COMPOSITIONS AND PROCESS OF MAKING ABSTRACT OF THE DISCLOSURE A one-component room temperature vulcanizable silicone rubber composition having improved flow characteristics and a process for preparing cured silicone rubbers derived therefrom. The one-component silicone rubber compositions consist of a silanol end-stopped linear diprganopolysiloxane base polymer, a filler, and organo- triacyloxysilane cross-linker, a catalyst and an organo- polysiloxane copolymer consisting of a polysiloxane chain and a polyether chain which are linked together through various carboxyl alkyl radicals. This final component accounts for the improvement in the flow properties of the one-component silicone rubber compositions. In a process for preparing a cured one-component silicone rubber composition, the polysiloxane polyether copolymer is mixed with the diorganopolysilioxane base polymer after which the cross-linker is added and the final mixture is exposed to moisture for curing. A typical use of such a one-component is in caulking and sealing applications, where strong adhesion to various surfaces is important.
381416
Company General Electric
Eckersley Raymond A.
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