ES457581A1 - A method of preparation of a silicone rubber composition. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

A method of preparing a silicone rubber composition composed of: (A) 100 parts by weight of a polydiorganosiloxane rubber containing as organic radicals one more of the radicals methyl, phenyl, vinyl, ethyl and 3,3,3- trifluorpropyl, provided that at least 50% of the organic radicals of the polyorganosiloxane gum are methyl and not more than 2% are vinyl; (B) 25 to 75 parts by weight of a reinforcing silica filler; (C) 5 to 20 parts by weight of a hydroxylated diorganosilicon compound, containing on average about two hydroxyl radicals per molecule and at least 3% by weight of hydroxyl radicals attached to silicon and where the organic radicals are a combination of methyl, phenyl, and vinyl radicals in a proportion of 10 to 50% of phenyl radicals, 2 to 20% of vinyl radicals and the rest of the methyl radicals; (D) 20 to 80 parts by weight of fibrified blast furnace slag fibers; optionally (E) up to 10 parts by weight of an alkoxysilicon compound containing at least 25% by weight of silicon-bonded alkoxy radicals and (F) optionally, one or more of the following ingredients: a vulcanizing agent of polydiorganosiloxane gum, a specific organic vinyl peroxide, magnesium oxide, and ammonium carbonate or bicarbonate. (Machine-translation by Google Translate, not legally binding)