Method for preparing clear polyorganosiloxane elastomers

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

C - Chemistry, Metallurgy

08

L

400/7224

C08L 83/04 (2006.01) C08K 9/06 (2006.01) C08K 13/02 (2006.01)

Patent

CA 1315453

METHOD FOR PREPARING CLEAR POLYORGANOSILOXANE ELASTOMERS 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 hexaorgano- disilazane 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.

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