Method for preparing clear polyorganosiloxane elastomers

Details Method for preparing clear polyorganosiloxane elastomers Method for preparing clear polyorganosiloxane elastomers

1987-07-30

1988-11-15

Ivy, C. Warren

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...

524262, 524263, 524588, 524860, 524865, 524866, 524861, 524862, C08K 554, C08K 336, C08L 8304

Patent

active

047850477

ABSTRACT:
Compositions yielding optically clear silicone elastomers are obtained by preparing a homogeneous mixture comprising a liquid polydiorganosiloxane containing at least two vinyl or other ethylenically unsaturated radicals per molecule and a finely divided silica filler treated with a hexaorganodisilazane and then adding additional hexaorganodisilazane in an amount equal to at least 5 percent of filler weight. The blending is preferably carried out using a high rate of shear and volatile materials are removed by heating the composition under reduced pressure.

REFERENCES:
patent: 2786042 (1957-03-01), Iler
patent: 3624023 (1971-11-01), Hartlage
patent: 3957713 (1976-05-01), Jeram
patent: 3996189 (1976-12-01), Travnicek
patent: 4008198 (1977-02-01), Krohberger et al.
patent: 4418165 (1983-11-01), Polmanteer et al.

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