Abstract: A process for preparing a cyclic siloxane copolymer, a water repellent composition and the use for treating porous substrates like concrete, especially reinforced concrete.

Abstract: The invention relates to coatings for leather. In particular it relates to top coats for leather. It provides a leather coating composition comprising an organic synthetic resin in aqueous dispersion and an organopolysiloxane, characterized in that the organopolysiloxane is present in aqueous emulsion and comprises a silicone resin having an empirical formula: (I) where •R is a monovalent organic group having 1-30 carbon atoms, •Z is hydrogen or an alkyl group having 1-4 carbon atoms, •x has a value from 0.75 to 1.7, and •y has a value from 0.1 to 2.0, and having a viscosity of from 1 to 4000 mPa·s at 25° C. We have found that the use of a silicone resin according to the invention greatly increases the abrasion resistance, as measured by the Taber method, of leather coated with the coating composition.

Abstract: Aqueous emulsions of a silicone resin are disclosed that provide a solid silicone resineous coating upon removing water from a film of the emulsion. The silicone resin emulsions are useful for treating various substrates for imparting water resistance/repellence and improving wear/weather protective properties. In particular, they are useful for rendering mineral-based building materials water-resistant, and also as binders in paints.

Abstract: A process is described for making polysiloxane emulsions by emulsion polymerizing a silicon monomer or oligomer under an elevated pressure. The process produces emulsions of a polysiloxane containing a lower amount of octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (D5) than conventional emulsion polymerization techniques. The emulsions by the inventive method can be used in cosmetic and personal care products, for textile treatment, lubrication, release, and building material protections.

Abstract: Aqueous emulsions of certain alkylalkoxysilanes and cationic alkoxysilanes provide water proofing properties to a variety of substances, and in particular to masonry or concrete surfaces.

Abstract: Aqueous emulsions of a silicone resin are disclosed that provide a solid silicone resineous coating upon removing water from a film of the emulsion. The silicone resin emulsions are useful for treating various substrates for imparting water resistance/repellence and improving wear/weather protective properties. In particular, they are useful for rendering mineral-based building materials water-resistant, and also as binders in paints.

Abstract: Aqueous emulsions of a silicone resin are disclosed that provide a solid silicone resineous coating upon removing water from a film of the emulsion. The silicone resin emulsions are useful for treating various substrates for imparting water resistance/repellence and improving wear/weather protective properties. In particular, they are useful for rendering mineral-based building materials water-resistant, and also as binders in paints.

Abstract: An aqueous silicone emulsion forms a resin reinforced elastomeric film upon water evaporation. The emulsion composition contains a dispersed phase consisting of a silicone mixture composed of (i) a linear hydroxy terminated polydiorganosiloxane, (i) a silicone MQ resin, and (iii) an organofunctional polysiloxane. The aqueous silicone emulsion is prepared by mixing ingredients (i) to (iii) to form a mixture, adding emulsifiers and water to the mixture, mixing the ingredients to obtain an aqueous base emulsion, adjusting the pH of the base emulsion to an acidic or basic pH to facilitate crosslinking, and subsequently neutralizing the emulsion. Elastomeric films can be obtained by drying the emulsion on a substrate at ambient conditions.

Abstract: Silicone emulsions are disclosed containing an organosiloxane reaction product from the emulsion polymerization of an alkoxysilane and an epoxy-functional alkoxysilane. The silicone emulsions provide transparent cured films upon drying.

Abstract: A mechanical method of making an oil-in-watermicroemulsion containing (A) a polysiloxane and (B) an inert fluid selected from an inert siloxane fluid and an inert organic fluid, where the average emulsion particle size is between 1 and 140 nanometers, is disclosed. The process involves the following steps: i) preparing an oil phase comprising a polysiloxane containing mixture by the polymerisation of silane or siloxane containing monomers and/or oligomers in the presence of an inert fluid, a suitable catalyst and optionally an end-blocking agent; and ii) where required quenching the polymerisation process; wherein the inert fluid is substantially retained within the resulting polysiloxane containing mixture; iii) if required, mixing one or more surfactants into the oil phase; iv) adding water to the oil phase, followed by applying agitation or shear to the mixture to arrive at an oil-in-water microemulsion; v) optionally diluting the oil-in-water microemulsion by adding more water.

Abstract: An aqueous siloxane resin containing emulsion is prepared by: (i) adding water, at least one nonionic surfactant, optionally adding an ionic surfactant, and a catalyst, to a reaction vessel, and heating the contents of the vessel to form a mixture; (ii) adding to the mixture at least one silane monomer of the formula RSi(OR?)3; (iii) optionally, adding to the mixture, silane monomers of the formula R2Si(OR?)2 or R3SiOR?; (iv) allowing the silane monomer to hydrolyze and condense by a polymerization reaction in the catalyzed aqueous mixture; (v) terminating the reaction by neutralizing the mixture; and (vi) recovering from the mixture a siloxane resin emulsion containing a siloxane resin.

Abstract: Aqueous emulsions of a silicone resin are disclosed that provide a solid silicone resineous coating upon removing water from a film of the emulsion. The silicone resin emulsions are useful for treating various substrates for imparting water resistance/repellence and improving wear/weather protective properties. In particular, they are useful for rendering mineral-based building materials water-resistant, and also as binders in paints.

Abstract: An aqueous silicone emulsion forms a resin reinforced elastomeric film upon water evaporation. The emulsion composition contains a dispersed phase consisting of a silicone mixture composed of (i) a linear hydroxy terminated polydiorganosiloxane, (i) a silicone MQ resin, and (iii) an organofunctional polysiloxane. The aqueous silicone emulsion is prepared by mixing ingredients (i) to (iii) to form a mixture, adding emulsifiers and water to the mixture, mixing the ingredients to obtain an aqueous base emulsion, adjusting the pH of the base emulsion to an acidic or basic pH to facilitate crosslinking, and subsequently neutralizing the emulsion. Elastomeric films can be obtained by drying the emulsion on a substrate at ambient conditions.

Abstract: An aqueous siloxane resin containing emulsion is prepared by: (i) adding water, at least one nonionic surfactant, optionally adding an ionic surfactant, and a catalyst, to a reaction vessel, and heating the contents of the vessel to form a mixture; (ii) adding to the mixture at least one silane monomer of the formula RSi(OR?)3; (iii) optionally, adding to the mixture, silane monomers of the formula R2Si(OR?)2 or R3SiOR?; (iv) allowing the silane monomer to hydrolyze and condense by a polymerization reaction in the catalyzed aqueous mixture; (v) terminating the reaction by neutralizing the mixture; and (vi) recovering from the mixture a siloxane resin emulsion containing a siloxane resin.

Abstract: Fibers, textiles, and leather are treated by applying to the fibers, textiles, and leather 0.1-15 weight percent based on the weight of the fibers, textiles, or leather of a treatment composition. The treatment composition consists of a blend containing a silicone resin component and a fluorocarbon component. The fluorocarbon component can be at least one of an emulsion containing a fluoroalkyl acrylate copolymer or an emulsion containing a fluorinated polyurethane. The silicone resin component is at least one of (i) an aminofunctional silicone resin, (ii) an emulsion containing an aminofunctional silicone resin, (iii) a carbinol functional silicone resin, (iv) an emulsion containing a carbinol functional silicone resin, (v) an epoxy functional silicone resin, or (vi) an emulsion containing en epoxy functional silicone resin.

Abstract: An aqueous silicone emulsion forms a resin reinforced elastomeric film upon water evaporation. The emulsion composition contains a dispersed phase consisting of a silicone mixture composed of (i) a linear hydroxy terminated polydiorganosiloxane, (i) a silicone MQ resin, and (iii) an organofunctional polysiloxane. The aqueous silicone emulsion is prepared by mixing ingredients (i) to (iii) to form a mixture, adding emulsifiers and water to the mixture, mixing the ingredients to obtain an aqueous base emulsion, adjusting the pH of the base emulsion to an acidic or basic pH to facilitate crosslinking, and subsequently neutralizing the emulsion. Elastomeric films can be obtained by drying the emulsion on a substrate at ambient conditions.

Abstract: Silicone-in-water emulsions are prepared using a silicone polyether as the surfactant. The resulting emulsions are stable in an aqueous media in the presence of salts such as electrolytes, alcohols, solvents, and combinations thereof. The silicone-in-water emulsions are prepared by polymerizing silicon atom containing monomers in water containing the monomer, a silicone polyether, a catalyst, and optionally an organic surfactant(s), until a silicone polymer of a desired molecular weight is obtained. The silicone-in-water emulsions possess utility as additives in various coating products, personal care products, household care products, automotive care products, and petroleum products.

Abstract: A method is provided for making aqueous silicone resin containing emulsions by (i) mixing a silicone resin or a blend of a silicone resin and a non-resinous silicone polymer, with an inversion assisting polymer to form a homogeneous oil phase; (ii) mixing one or more surfactants with the homogenous oil phase in (i) to form a mixture; (iii) adding sufficient water to the mixture in (ii) to cause an inversion of the continuous phase and the dispersed phase, and forming an oil-in-water emulsion; (iv) diluting the oil-in-water emulsion in (iii) by adding more water; and (v) recovering an oil-in-water emulsion containing silicones having a particle size in range of 100 nanometer to 5,000 nanometer (0.1 to 5.0 micron).

Abstract: Emulsions prepared using a silicone polyether as the surfactant are stable in an aqueous media in the presence of salts such as electrolytes, alcohols, solvents, and combinations thereof. The emulsions can be prepared by (i) polymerizing an unsaturated monomeric organic compound in water containing the monomer, a silicone polyether, a catalyst, and optional organic surfactants, until a polymer of desired molecular weight is obtained; (ii) by mechanically emulsifying a non-silicon atom containing organic oil in water using a silicone polyether with or without addition of other organic surfactants; and (iii) by mixing and adding a silicone polyether to a previously prepared emulsion.

Abstract: Silicone oil-in-water emulsions are prepared using a silicone polyether as the surfactant, and the silicone oil-in-water emulsions are stable in an aqueous media in the presence of salts such as electrolytes, alcohols, solvents, and combinations thereof. The silicone oil-in-water emulsions are prepared by (i) polymerizing silicon atom containing monomers in water containing the monomer, a silicone polyether, a catalyst, and optionally an organic surfactant(s), until a silicone oil of a desired molecular weight is obtained. The silicone oil-in-water emulsions possess utility as additives in various coating products, personal care products, household care products, automotive care products, and petroleum products.