Heat curable silicone-polyimide block copolymers

Details Heat curable silicone-polyimide block copolymers Heat curable silicone-polyimide block copolymers

1984-04-27

1985-06-11

Marquis, Melvyn I.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525474, 525478, 525479, 528 24, 528 26, C08G 6948

Patent

active

045229856

ABSTRACT:
Heat curable siloxane-imide block copolymer compositions are provided based on the use of an organic peroxide and a siloxane imide block copolymer containing norbornane siloxy imide functional groups. A hydrosilyl terminated norbornane oligomide is employed with polydiorganosiloxane having olefinic unsaturation, or silicon hydride functional groups to make siloxane-imide block copolymer which can be further blended with additional polydiorganosiloxane along with effective amounts of free radical initiators. The resulting silicon elastomers have improved toughness compared to conventional heat cured polydiorganosiloxanes.

REFERENCES:
patent: 4381396 (1983-04-01), Ryang
patent: 4404350 (1983-09-01), Ryang
patent: 4472565 (1984-09-01), Ryang
An Introduction to the Chemistry of the Silicones, E. G. Rochow, Second Edition, John Wiley & Sons, Inc., NY (1951) pp. 94-97.

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