C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
402/17, 400/5322
C08L 83/04 (2006.01) C08G 77/44 (2006.01)
Patent
CA 1167586
LIQUID COPOLYMERIC ORGANOPOLYSILOXANES COMPRISING SiO2 AND METHOD THEREFOR Abstract of the Disclosure Copolymeric organopolysiloxanes comprising SiO2 are prepared by forming an acidic, homogeneous mixture of a silanol-containing resinous copolymeric siloxane comprising R3SiO1/2 siloxane units and SiO2 siloxane units, an organohydrogenpolysiloxane and an organic solvent and heating the resulting mixture to remove substantially all of the organic solvent. The copolymeric organosiloxanes contain silicon-bonded hydroxyl radicals and/or silicon-bonded hydrogen radicals in varying amounts which depends upon the acidity of the homogeneous mixture that is formed and the ratio of silicon-bonded hydrogen radicals to silicon-bonded hydroxyl radicals therein. The copolymeric organopolysiloxanes are useful as a reactive component in various types of curable silicone compositions.
389345
Blizzard John D.
Swihart Terence J.
Dow Corning Corporation
Gowling Lafleur Henderson Llp
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