Method for preparing vinyl terminated fluorine-containing...

Details Method for preparing vinyl terminated fluorine-containing... Method for preparing vinyl terminated fluorine-containing...

C - Chemistry, Metallurgy

08

G

402/15

C08G 77/24 (2006.01) C08G 77/08 (2006.01) C08G 77/20 (2006.01)

Patent

CA 1282531

METHOD FOR PREPARING VINYL TERMINATED FLUORINE-CONTAINING POLYDIORGANOSILOXANE Abstract Liquid diorganovinylsiloxy terminated polydiorgano- siloxanes wherein at least 50 percent of the hydrocarbon radicals bonded to silicon contain at least one perfluorinated carbon atom are prepared by polymerizing the corresponding diorganocyclosiloxane(s) at a temperature of from 25 to 150°C under superatmospheric pressure and in the presence of a controlled amount of water and a catalytically effective amount of ammonia. The resultant silanol terminated polydiorganosiloxane is reacted with a hexaorgano- disilazane containing a vinyl radical bonded to each of the two silicon atoms.

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