C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/108, 402/14,
C08F 4/26 (2006.01) C08F 2/44 (2006.01) C08G 77/38 (2006.01) C08G 77/398 (2006.01) C08L 83/04 (2006.01)
Patent
CA 1049484
ABSTRACT OF THE DISCLOSURE A crosslinker-platinum catalyst-inhibitor is prepared by heating in a closed system for 10 to 30 hours at 50°C. to 90°C. a mixture of a siloxane having at least three silicone-bonded hydrogen atoms, an acetylenic alcohol and a platinum catalyst and then removing the unreacted acetylenic alcohol at reduced pressure and 20°C. to 30°C. A complex product is obtained which when combined with a vinyl containing siloxane polymer has an extended shelf-life but can be cured by heating. The complex product functions as a crosslinker, a catalyst and an inhibitor which retards the reactions of silicon- bonded hydrogen atoms with aliphatic unsaturation catalyzed by platinum.
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