Silicone elastomers having thermally conductive properties
AssigneeSWS Silicones Corporation
InventorsMarie J. Streusand, John C. Getson, Richard C. McAfee
Life of this patent
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Abstract
Silicone elastomers having thermally conductive properties which comprise an organopolysiloxane having Si-bonded aliphatically unsaturated groups, an organohydrogenpolysiloxane having Si-bonded hydrogen atoms, a catalyst capable of promoting the addition of Si-bonded hydrogen to Si-bonded aliphatically unsaturated groups and from about 30 to 95 percent by weight of filler, based on the weight of the composition, of which at least 10 percent by weight of the filler is silicon nitride particles.
Claims17
A thermally conductive organopolysiloxane composition comprising (a) an organopolysiloxane having an average of at least two aliphatically unsaturated hydrocarbon radicals per molecule, (b) an organohydrogenpolysiloxane having an average of at least two Si-bonded hydrogen atoms per molecule, (c) a catalyst capable of promoting the addition of the Si-bonded hydrogen atoms to the aliphatically unsaturated hydrocarbon radicals and (d) from about 30 to 95 percent by weight of filler based on the weight of the composition, of which at least 10 percent by weight of the filler is silicon nitride particles.
A process for preparing a thermally conductive elastomer which comprises mixing (a) an organopolysiloxane having an average of at least two aliphatically unsaturated hydrocarbon radicals per molecule with (b) an organohydrogenpolysiloxane having an average of at least two Si-bonded hydrogen atoms per molecule, (c) a catalyst capable of promoting the addition of the Si-bonded hydrogen atoms to the aliphatically unsaturated hydrocarbon radicals and (d) from about 30 to 95 percent by weight of filler based on the weight of the composition, of which at least 10 percent by weight of the filler is silicon nitride particles.
Dependencies are inferred from the claim text.