Curable organosiloxane compositions

Details Curable organosiloxane compositions Curable organosiloxane compositions

1987-08-25

1988-06-28

Marquis, Melvyn I.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524861, 525478, 528 15, 528 31, 528 32, C08L 8304

Patent

active

047539780

ABSTRACT:
The tear strength of cured organosiloxane elastomers can be increased without adversely affecting other physical properties if the composition used to prepare the elastomer is curable by a platinum-catalyzed hydrosilation reaction and contains a mixture of two liquid diorganovinylsiloxy terminated polydiorganosiloxanes, one of which constitutes from 70 to 95 percent by weight of said mixture and contains vinyl or other ethylenically unsaturated hydrocarbon radicals only at the terminal positions. The second polydiorganosiloxane contains both terminal vinyl radicals and from 1 to 5 mole percent of vinyl radicals on non-terminal repeating units.

REFERENCES:
patent: 3671480 (1972-06-01), Wada et al.
patent: 3884866 (1975-05-01), Jeram et al.
patent: 4057596 (1977-11-01), Takamizawa et al.
patent: 4162243 (1979-07-01), Lee et al.
patent: 4539357 (1985-09-01), Bobear

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