Method for extending the working life of organosiloxane composit

Details Method for extending the working life of organosiloxane composit Method for extending the working life of organosiloxane composit

1988-06-27

1991-04-02

Bleutge, John C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 31, 528 32, 525478, C08G 7706

Patent

active

050047922

ABSTRACT:
Certain liquid polydiorganosiloxanes wherein each molecule contains at least one sequence of 2 or more vinyl radicals bonded to non-terminal silicon atoms extend the working time at 25.degree. C. of organosiloxane compositions that cure by a platinum catalyzed hydrosilation reaction without adversely affecting the cure rate of the composition at temperatures of about 100.degree. C. and above. These polydiorganosiloxanes can constitute up to 100 percent of the vinyl-containing polydiorganosiloxanes present in said organosiloxane compositions and are prepared by polymerizing the corresponding cyclosiloxanes in the presence of an acid catalyst.

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patent: 3445420 (1969-05-01), Kookootsedes et al.
patent: 3699073 (1972-10-01), Wada et al.
patent: 3923705 (1975-12-01), Smith
patent: 3989667 (1976-11-01), Lee et al.
patent: 4256870 (1981-03-01), Eckberg
patent: 4472563 (1984-09-01), Chandra et al.

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