General Electric Company

General Electric Company Silicone Products Business Division

Warren R Lampe

James Anthony Cella

Frank J Traver

Tyrone D Mitchell

Alfred H Smith, Jr

John H Wright

Stephen B Hamilton

Annette A Moore

Kathleen R Hartley

Stanley J Bessmer

Room temperature vulcanizing elastomers are provided which comprise 100 parts of an .alpha.,.omega.-bis(hydroxy)dimethylpolysiloxane polymer, 2 to 20 parts of methyl triacetoxysilane and an amount of a hardening accelerator comprising a water-in-oil emulsion of water in a liquid organosilicon polymer stabilized with an organosilicon surfactant such that the water comprises at least 0.01% by weight of the total mixture.

Fast room temperature vulcanizing silicone elastomers

An addition cured rubber containing vinyl end-stopped diorganopolysiloxane and vinyl functional silicone resin is disclosed to provide superior durability when applied to a ship's hull as an anti-foulant or foul release coating.

Marine foulant release coating

A low modulus room temperature vulcanizable silicone rubber composition with a good shelf life comprising a silanol containing polysiloxane, a filler, an acyloxy functional silane as the cross-linking agent and as the catalyst a compound which is selected from the class consisting of zinc salts and zirconium salts or a co-catalyst system comprising as one co-catalyst a tin salt of carboxylic acid and as the other co-catalyst either a zinc salt or a zirconium salt of a carboxylic acid.

Low modulus room temperature vulcanizable silicone rubber compositions

A self-bonding additive for a dimedone functional one-component RTV in which the self-bonding agent is a dialkoxydisilylether functional silane.

Self-bonding one-component RTV silicone rubber compositions

A method of coating an automotive part with a room temperature vulcanizable silicone rubber composition comprising applying to the automotive part a thin layer of a composition comprising a silanol end-stopped polysiloxane polymer, an alkyl silicate as the cross-linking agent and as the catalyst a metal salt of a carboxylic acid. The automotive part can be a tail pipe resonator or a muffler. Such composition, which is a two-component or two package room-temperature vulcanizable silicone rubber composition can also be used to coat the underside of a car to protect it from corrosion.

Method of coating automotive parts with silicone compositions

A process of forming a roofing composite comprising applying to a roofing substrate a self-bonding room temperature vulcanizable silicone rubber composition comprising a linear organopolysiloxane, a filler, an alkyl silicate or a hydrolyzate product of an alkyl silicate and a nitrogen functional silane of the formula, ##STR1## where R is selected from the class consisting of monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals, .SIGMA. is a hydrolyzable group selected from the class consisting of alkoxy, phenoxy, halo, aminodialkylamino, and tertiary hydroperoxy and .theta. is a saturated, unsaturated or aromatic hydrocarbon residue functionalized by a member selected from the class consisting of amino, carbonyl, carboxy, isocyano, azo, diazo, thio, thia, dithia, isothiocyano, oxo, oxa, halo, ester, nitroso, sulfhydryl, hydrocarbonylamido, sulfonamido and multiples and combinations thereof and wherein a is a whole number that varies from 0 to 2. There may also be included in the above composition a metallic salt of an organo monocarboxylic or dicarboxylic acid.

Method of forming a roofing composite using silicone rubber composition

A room temperature vulcanizable silicone rubber composition with sag-control wherein the base material or mixture of ingredients for forming the composition comprises a silanol end-stopped diorganopolysiloxane polymer, at least 3 parts of a fumed silica filler and as the sag-control ingredient, from 0.03 to 2.0 parts of a polyether. As a work-like extending additive in the case of a two-part room temperature vulcanizable silicone rubber composition, there may be added to the basic ingredients of the composition a low viscosity silanol end-stopped polysiloxane.

Room temperature vulcanizable silicone rubber compositions with

There is provided by the present invention a twopart room temperature vulcanizable silicon rubber composition which is exceptionally stable to reversion and specifically to reversion of the cured composition caused by water comprising a silanol-stopped diorganopolysiloxane, filler, an alkyl silicate and a catalyst where the catalyst is a reaction product of an organic tin oxide compound with the hydrocarbon ester of an oxygen-containing acid having at least one oxygen atom in the acid radical attached to a replaceable acid hydrogen atom. The hydrocarbon ester can be either an inorganic acid or a carboxylic acid. The preferred catalyst in the present invention is the reaction product of dibutyl tin oxide and a phthalate ester.

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Ballston Lake, NY, United States of America

Warren R Lampe