Abstract: A condensation curable silyl functional hydrocarbon polymer composition with improved adhesion to substrates. The composition comprises: (A) 100 parts by weight of an organic hydrocarbon polymer having a number average molecular weight of about 500 to about 300,000, and on average at least 1 hydrolyzable silyl group per molecule; (B) 0.

Abstract: A hydrosilylation curable composition containing a comprising (A) 100 parts by weight of an organic polymer haying on average at least 1.4 alkenyl groups per molecule; (B) an amount sufficient to cure the composition of a crosslinker having on average at least 1.4 Si—H groups per molecule; (C) a platinum group metal-containing catalyst in an amount sufficient to effect curing of the composition; (D) 0.

Abstract: A moisture curing composition comprising (a) an oxyalkylene polymer having at least one reactive silicon group in each molecule, (b) bis(3-triethoxysilylpropyl)tetrasulfane, and (c) a condensation catalyst. The presence of the bis(3-triethoxysilylpropyl)tetrasulfane in the composition provides for improved physical properties such as tensile strength and elongation. The present compositions are suitable for use in such applications as sealing materials for construction both in the form of extrudable liquid compositions and as cured preformed configurations such as tapes.

Abstract: The discoloration of a non-acidic room temperature vulcanizable silicone sealant containing a ultraviolet radiation degradable fungicide is delayed by adding zinc oxide.

Abstract: This invention relates to the preparation of an addition curable composition having self adhesion to substrates. The addition curable composition comprises an organic polymer having on average at least 1.4 alkenyl groups per molecule, a crosslinker having on average at least 1.4 hydrosilyl groups per molecule, a platinum group metal containing catalyst, an alkoxy silicon compound and a titanium compound having Ti--O--C bonds. Another embodiment of this invention is a method of adhering the addition curable composition to a substrate surface.

Abstract: A crosslinked polysiloxane dispersion comprising a siloxane polymer, polymer mixture, or polymer/solvent mixture, capable of crosslinking via condensation, addition or free radical reactions, and having a viscosity of greater than 5000 mPa.s but less than 500,000 mPa.s, if required, 0.1 to 10 weight parts of a crosslinking agent, and, if required, depending on the nature of the catalyst and silicon cure system, 0.000001 to 10 weight parts of a catalyst, 0.5 to 10 weight parts of a surfactant or surfactant mixture, and 0.5 to 25 weight parts water per 100 weight parts siloxane polymer. Optionally, adhesion promoters, pigments, reinforcing or non-reinforcing fillers, silicone resins, stabilizers, freeze/thaw additives, etc. may also be added to the dispersion.

Abstract: This invention relates to the preparation of an addition curable composition curable to a high tensile strength, tack free composition. The addition curable composition comprises an organic polymer having on average at least 1.4 alkenyl groups per molecule, a crosslinker having on average at least 1.4 hydrosilyl groups per molecule, a platinum group metal-containing catalyst and a specific ratio of a fatty acid treated, precipitated calcium carbonate filler having an average particle size in the range of 0.05 to 1 micron and a ground filler selected from the group consisting of calcium carbonate, kaolin clay and amorphous, non quartz silica each having an average particle size in the range of 0.2 to 40 microns.

Abstract: This invention relates to sprayable aqueous silicone emulsions which form silicone elastomers upon the removal of water having improved smoke and fire resistant properties. The aqueous silicone emulsion comprises water, a product of a diorganosiloxane polymer and a crosslinker, a surfactant and a filler selected from the group consisting of aluminum trihydrate, fumed titanium dioxide, magnesium oxide, ceramic fillers and zinc borate. The silicone emulsion has a viscosity of 10,000 to 120,000 mPa s and exhibits pseudo plastic rheology which facilitates its application by spraying. A softening agent may also be added for modulus control.

Abstract: A crosslinked polymer dispersion comprising a preformed polymer, selected from the group consisting of silicon modified organic polymers, mixtures of silicon modified organic polymers, mixtures of silicon modified organic polymer(s) with regular organic polymers, mixtures of silicon modified organic polymer(s) with siloxane polymers, mixtures of above polymers, and mixtures of above polymer(s) with organic plasticizers or solvents.

Abstract: This invention relates to an aqueous silicone emulsion which forms a silicone elastomer upon the removal of water having improved adhesions to substrates. The silicone emulsion comprises the product form by mixing a diorganosiloxane polymer, water, surfactant, optionally a crosslinker, a tin condensation catalyst, optionally an acid and an effective amount of an aminofunctional siloxane which is formed by reacting an aminofunctional silane and a hydroxy-endblocked organosiloxane.

Abstract: An aqueous silicone emulsion which upon the evaporation of the water forms a surface modified elastomeric silicone material providing improved coverage and adhesion of paint and reduced staining and coefficients of friction, each relative to other silicone elastomers from aqueous emulsions. The silicone emulsion comprises (A) water; (B) a plurality of particles dispersed in the water comprising a crosslinked product of a diorganosiloxane polymer; (C) a surfactant; and (D) an amount of an oxygen curing compound or a salt thereof effective for the surface modification. If a surface active salt of an oxygen curing compound is used, it may not be required to add additional surfactant in order to form the silicone emulsion.

Abstract: This invention relates to a method of sealing openings in structural components of a building to reduce the amount of smoke which may pass through the opening in the event of a fire. The method comprises filling an opening in a structural component of a building with a support material; applying a coating of a silicone composition over the filled opening and allowing the silicone composition to cure into a continuous elastomeric film having certain properties. These silicone compositions exhibit pseudo plastic rheology which facilitates their application by spraying.

Abstract: The longevity of a surface driving oil layer on a room temperature vulcanizable silicone sealant is increased by adding zinc oxide to a non-acidic composition and exposing the composition to atmospheric moisture which forms the surface drying oil layer on an air exposed surface.