Method of improving silicone rubber composition

Details Method of improving silicone rubber composition Method of improving silicone rubber composition

C - Chemistry, Metallurgy

08

L

400/5322

C08L 83/04 (2006.01) C08L 83/07 (2006.01)

Patent

CA 1191295

METHOD OF IMPROVING SILICONE RUBBER COMPOSITION ABSTRACT A new method of producing a silicone rubber composition yields a unique composition. When the composition is further mixed with extending filler and vulcanized, the tensile strength of the vulcanized silicone rubber is improved over that obtained when the composition is not produced following the method of this invention. The method mixes polydiorganosiloxane gum, treated reinforcing silica filler, a portion of hydroxylated organosilicon compound having an average of from 1 to 20 percent by weight hydroxyl radicals and an average of from 1 to 31 percent by weight vinyl radicals; heating the mixture; then cooling and admixing another portion of the hydroxylated organosilicon compound.

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