C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/26, 400/5128
C08G 77/24 (2006.01) C08G 77/06 (2006.01) C08L 83/08 (2006.01) C09D 5/25 (2006.01) C09D 167/00 (2006.01) C09D 183/04 (2006.01)
Patent
CA 1102486
Abstract of the Disclosure A process for producing a silicone resin composed solely of difunctional siloxy units comprising hydrolyzing a diorganodihalosilane in a heterogeneous hydrolysis mixture having therein water, acetone, a water-immiscible organic solvent and optionally, an alcohol; wherein said hydrolysis must take place within ten minutes, and separating the water layer from the water-immiscible solvent silicone resin layer The silicone resin is further purified and bodied in subsequent process steps. There is also provided by the present invention a silicone resin mixture composed of the above difunctional silicone resin and a silicone resin composed of trifunctional siloxy units and difunctional siloxy units which silicone resin mixture has good thermal stability at temperatures up to 700°F.
285136
Company General Electric
Eckersley Raymond A.
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