Abstract: This invention relates to aqueous emulsions comprising a polyorganosiloxane and a wax, and to methods of production of such emulsions. The emulsions are of the type oil-in-water. An organopolysiloxane is polymerized in admixture with a molten wax, thereby forming a blend of the wax with an organopolysiloxane of increased molecular weight, and the said blend of polymer and molten wax is emulsified in water in the presence of a surfactant. The emulsions are useful in personal care applications such as on hair, skin, mucous membrane or teeth. The emulsions are also useful in applications such as paints, water based coatings, textile fibre treatment, leather lubrication, fabric softening, fabric care in laundry applications, homecare, release agents and oil drag reduction.

Abstract: The invention relates to branched organopolysiloxanes and to their preparation and use. A branched organopolysiloxane is prepared by the reaction of an alkoxysilane with a substantially linear organopolysiloxane containing at least one hydroxyl or hydrolysable group bonded to silicon, in the presence of a phosphazene catalyst. The branched organopolysiloxanes obtained can be suitable for use in a moisture curable sealant composition capable of curing to a high modulus seal, with less tendency to gel than when using other siloxane polycondensation catalysts. Phosphazene catalysts also have the advantage that the content of undesired low molecular weight cyclic silicones in the polymerisation product is low.

Abstract: The invention provides a composition for improving the water repellency of a substrate, like a construction substrate for example a building component. This composition contains a mixture formed by combining: water, at least one water-repellent silicon-containing compound, which is a silicone resin, an alkoxysilane or a polysiloxane, a siloxane surfactant containing an alkylpoly(ethyleneoxy)siloxane group and an alkyl siloxane group, where the alkyl group contains 1-6 carbon atoms. The composition can be used on previous treated substrates or more generally on substrates which are difficult to wet or penetrate.

Abstract: A one or two part organopolysiloxane composition capable of cure to an elastomeric body, the composition comprising a polymer having a polymer backbone selected from an organopolysiloxane backbone and a telechelic backbone, which polymer has not less than two reactable silicon-bonded groups selected from alkenyl group, condensable groups, silyl-hydride groups, 5 to 50% by weight of the composition of an extender; a suitable cure catalyst; and optionally a siloxane and/or silane cross-linker having at least two groups per molecule which are reactable with the reactable groups in (a) and/or one or more fillers. The extender is selected from an alicyclic ester having at least two ester groups, and a boiling point of at least 180° C. or a mixture thereof having a boiling point range commencing at 180° C. or above; each ester group being the same or different and comprising from 2 to 30 carbon atoms.

Abstract: A moisture curable composition comprising a polymer (A) containing reactive hydroxyl or hydrolysable groups bonded to silicon, which groups are reactive in the presence of moisture with each other or with groups in a crosslinking agent (B) present in the composition, characterized in that the composition is free from organic compounds of tin and contains kaolin as a catalyst for the reaction of the reactive groups of polymer (A). The kaolin is preferably calcined and most preferably is the only catalyst utilised during cure.

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: The invention relates to oil-in-water emulsions, methods of making said emulsions and their uses in fabric care or hair care compositions. The fabric care composition comprises a silicone oil-in-water emulsion which emulsion is obtained by a. forming an oil phase by mixing at least one silicone compound with at least one silicone-free oil, b. optionally adding an emulsifier, c. adding water, d. forming an oil-in-water emulsion. A silicone oil, comprising a siloxane or polysiloxane compound, for example polydimethyl siloxane (polydimethyl silicone or PDMS), or a derivative thereof, e.g., amino and amido silicone, diluted with a silicone-free oil still can provide an emulsion providing high fabric care properties while decreasing the costs.

Abstract: Emulsions are disclosed of dilatant boron crosslinked organopolysiloxanes, coatings prepared from the emulsions, and various substrates impregnated with these coatings. The emulsions may be coated or impregnated onto fabrics to provide an energy absorbing material in Active Protection Systems.

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: Aqueous silicone emulsions are disclosed containing a phenyl silsesquioxane resin, an alkoxysilane, a hydroxy terminated polydialkylsiloxane, and an emulsion of an aminofunctional polysiloxane. The silicone emulsions are useful for imparting water repellency to various surfaces, and in particular, inorganic building surfaces.

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: Silicone oil-in-water emulsions containing a polysiloxane containing polymer is prepared by first preparing a polysiloxane containing polymer by the polymerisation of siloxane containing monomers and/or oligomers in the presence of an inert organopoly siloxane and/or an organic fluid, a suitable catalyst and optionally an end-blocking agent; and quenching the reaction if required. If required one or more surfactants may be introduced into the polysiloxane containing polymer to form a homogenous oil phase. Water is then added (in an amount of 0.1-10 percent by weight based on total oil phase weight) to the homogenous oil phase to form a water-in-oil emulsion. Shear is applied to the water-in-oil emulsion to cause inversion of the water-in-oil emulsion to an oil-in-water emulsion. Finally, if required the oil-in-water emulsion can be diluted by adding more water.

Abstract: A method of making silicone-based foam control agents comprising: i) preparing a polysiloxane containing polymer by the polymerisation of siloxane containing monomers and/or oligomers in the presence of an inert organopolysiloxane and/or an organic fluid, a suitable catalyst and optionally an end-blocking agent; ii) where required quenching the polymerisation process; wherein the inert organopolysiloxane and/or organic fluid is substantially retained within the resulting diluted polysiloxane containing polymer; iii) introducing from 0.1 to 10% by weight of a suitable filler prior to during or subsequent to step (i); iv) optionally introducing up to 5% by weight of a suitable silicone resin during or subsequent to step (i) and v) where required, adapting the foam control agent produced in steps (i) to (iv) into a suitable form of delivery therefor.

Abstract: A silicone composition comprising a polymer having siloxane units and two or more silicon bonded hydroxyl or hydrolyzable groups per molecule; a crosslinker; an extender material which is either an alkyl substituted aryl compound such as a heavy alkylate, or a alkylcycloaliphatic compound; and a u.v. light stabilizer comprising a benzotriazole moiety. These compositions are useful, for example as room temperature vulcanizable sealants. They retain color clarity or transparency, even on ageing.