Rapidly curable extrudable organosiloxane compositions

Details Rapidly curable extrudable organosiloxane compositions Rapidly curable extrudable organosiloxane compositions

1990-01-29

1990-08-07

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

528 32, 528 31, 528 15, 524862, 524861, 523216, C08K 906

Patent

active

049468782

ABSTRACT:
Extrudable organosiloxane compositions that cure by a hydrosilation reaction comprise a first polydiorganosiloxane containing alkenyl radicals only at the terminal positions of each molecule and a second polydiorganosiloxane containing alkenyl radicals on both terminal and non-terminal silicon atoms. When the alkenyl radicals on at least the second of the two polydiorganosiloxanes contain at least four carbon atoms the cure rate of the compositions is substantially increased relative to compositions wherein the alkenyl radicals on this polymer are vinyl.

REFERENCES:
patent: 3671480 (1972-06-01), Wada et al.
patent: 4162243 (1979-07-01), Lee et al.
patent: 4609574 (1986-09-01), Keryk et al.
patent: 4611042 (1986-09-01), Rivers-Farrell et al.
patent: 4753978 (1988-06-01), Jensen

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