Silicone-polyimide copolymers, condensation vulcanizable composi

Details Silicone-polyimide copolymers, condensation vulcanizable composi Silicone-polyimide copolymers, condensation vulcanizable composi

1984-01-03

1984-09-18

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

525431, 525474, 525478, 528 31, 556407, 556419, C08G 7704

Patent

active

044725655

ABSTRACT:
Silicone-polyimide copolymers having terminal silanol or silicon hydride radicals are provided based on the use of a norbornene terminated polyimide. A hydrosilation reaction is employed to introduce silicon-hydrogen into the terminal position of the polyimide having norbornene termination. The resulting hydrosilyl terminated polyimide is reacted with silanol terminated polydiorganosiloxane in the presence of a catalyst to produce silanol terminated polydiorganosiloxane-polyimide copolymer. Room temperature or low temperature condensation vulcanizable compositions based on the use of such silanol-terminated copolymers provide cured silicon-polyimide copolymers exhibiting improved toughness.

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