Abstract: A simplified method of manufacture for platinum (O) alkyne complexes is disclosed, as well as novel platinum (O) alkyne complexes per se. The complexes are made by reacting platinum-vinylsiloxane complexes with alkynes. The complexes are used in hydrosilylation, hydrogenation, isomerization and oligomerization reactions. Curable silicones using these platinum (O) alkyne complexes as curing catalysts are also disclosed.

Abstract: Improved reactive liquid silicone resins are disclosed. The resins are the product of certain reactive liquid resins and a compound selected from acyloxysilanes, alkoxysilanes, and oximosilanes. When incorporated in a curable silicone composition, such as an elastomeric coating, the improved resins of this invention confer improved working time to the curable composition, and enhance the adhesion of the curable composition to a substrate.

Abstract: Silicone compositions are disclosed which comprise a liquid silicone resin, a vinyl-containing silicone resin, a siloxane polymer, and a hydrosilylation catalyst. The compositions cure to give unusually strong, fuel resistant coatings and elastomers.

Abstract: Silicone compositions having improved thermal oxidative stability are disclosed. The compositions contain iron acetylacetonate, nickel acetylacetonate, cerium acetylacetonate, alpha,omega-bis(trimethylsiloxy)-polydimethylsiloxanes, and optionally, a carboxylic acid. The compositions show greatly increased gel times at temperatures of, e.g. 275.degree. C.

Abstract: Highly stable emulsions of carboxyl-containing silicone fluids in water are prepared by using a combination of two surfactants. The first, or primary surfactant, has the formula RO(C.sub.m H.sub.2m O).sub.n H, where R is a hydrocarbon lipophile, m has a value of 1, 2, or 3, and n has an average value greater than 15. The second or cosurfactant, is selected from fatty acid esters of sorbitol and surfactants having the formula R'O(C.sub.p H.sub.2p O).sub.q H, wherein R' is a hydrocarbon lipophile, p has a value of 1, 2, or 3 and q has a value such that the cosurfactant is just insoluble in the carboxyl-containing silicone fluid.

Abstract: A method for treating starch with organosiloxane polymers is described in which the organosiloxane polymer is contacted with starch in an aqueous dispersion at a temperature of from 60.degree. C. to 98.degree. C. for a period of at least 60 seconds. Starch treated by this method can be useful as glue, a binder, a filler, or a coating. Starch treated with aminoalkyl- or epoxyalkyl- substituted polydimethylsiloxane is especially useful as a water repellent sizing for substrates such as paper and textiles.

Abstract: Carboxyfunctional silicone coating compositions are disclosed. These compositions can be coated and cured upon various substrates to furnish smooth, tough, protective, cleanable surfaces. The compositions comprise: (A) a certain liquid copolymeric polyorganosiloxane; (B) a carboxyfunctional silicone; and (C) a catalyst.

Abstract: Silicone foam suppressant compositions are disclosed consisting essentially of a low viscosity polydimethylsiloxane and a high viscosity polydimethylsiloxane, a certain siloxane resin, and amorphous silica. These foam suppressant compositions can be used to suppress foam in both aqueous and hydrocarbon liquids. Advantageously, these foam suppressant compositions employ less of the resin and less amorphous silica than are normally found in silicone foam suppressants.

Abstract: A method for improving properties of a cellulosic textile fabric is disclosed. The fabric is first impregnated with an aqueous emulsion of a carboxyfunctional silicone fluid stabilized by a nonionic surfactant having a particular HLB value, and then heated to crosslink the carboxyfunctional silicone fluid.

Abstract: Compositions that cure rapidly to produce silicone foams and protective coatings are disclosed. These compositions comprise: (A) a certain liquid copolymeric polyorganosiloxane; and (B) an amino functional silicone polymer. For example, simple mixtures of the liquid copolymeric polyorganosiloxane and a polydiorganosiloxane having aminoalkyl substituents can be mixed together to form a resilient silicone foam. If the foam compositions are further provided with certain mineral fillers, a high degree of fire resistance is attained.

Abstract: A method is disclosed for enhancing at least one of the mechanical properties of a partially crystalline thermoplastic by forming a dispersion of a polydiorganosiloxane within the thermoplastic, and extending the resultant dispersion. Ultimate tensile strength, modulus, and ultimate elongation can be enhanced in comparison with the same thermoplastic with no added polydiorganosiloxane and no extension.

Abstract: Improved inhibitor systems are disclosed for the reaction of silicon hydride containing silicones with vinyl containing and/or hydroxyl containing silicones. The improved inhibitors are mixtures of conjugated ene-ynes and vinylcyclosiloxanes. Inhibition of cure at room temperature is combined with rapid cure at elevated temperature when the improved inhibitors are used.

Abstract: New cationic polydiorganosiloxanes are disclosed that are substantive to proteinaceous substrates. These cationic polydiorganosiloxanes have methyl substituents, and diaminoalkyl substituents reacted with benzyl chloride. These cationic polydiorganosiloxanes are easily emulsified and are useful for treating human hair, human skin, and animal fur.

Abstract: Hydrocarbon liquid resistant fluorosilicones are disclosed. The fluorosilicones comprise: (A) the reaction product of (i) a certain organosilicon resin consisting essentially of R.sub.3 SiO.sub.1/2 units and SiO.sub.4/2 units wherein R is a monovalent hydrocarbon radical, and (ii) a polyorganohydrogensiloxane; (B) a fluorosilicone containing vinyl radicals or hydroxyl radicals; and (C) a catalyst.

Abstract: A composition, used to control foaming in non-aqueous systems consisting essentially of (A) a foam control agent for non-aqueous systems that is not readily soluble in the non-aqueous systems, (B) a dispersing agent, and (C) a non-ionic surfactant having an HLB number greater than 10, is disclosed.

Abstract: Compositions that cure rapidly to produce silicone foams and protective coatings are disclosed. These compositions comprise: (A) a certain liquid copolymeric polyorganosiloxane; and (B) an amino functional silicone polymer. For example, simple mixtures of the liquid copolymeric polyorganosiloxane and a polydiorganosiloxane having aminoalkyl substituents can be mixed together to form a resilient silicone foam. If the foam compositions are further provided with certain mineral fillers, a high degree of fire resistance is attained.

Abstract: Fiber-treating compositions are disclosed which comprise polydiorganosiloxanes bearing epoxy-substituted groups and polydiorganosiloxane bearing amino-substituted groups and polyalkyleneoxide groups, or carboxy-substituted groups and polyalkyleneoxide groups. These compositions confer upon fibers enhanced antistatic properties, water absorbency, stain resistance, softness, smoothness, crease resistance and compression recovery. Advantageously, these enhanced properties are retained upon repeated washing of fibers treated with the compositions of the present invention.

Abstract: Adhesive-releasing silicone coatings are provided for substrates by applying a composition consisting essentially of a polydiorganosiloxane substituted with methyl, ethyl, propyl, or hydroxyl radicals and an ultraviolet radiation photosensitizer to a substrate, and exposing the applied solution to ultraviolet radiation. By the method of this invention said polydiorganosiloxanes can be crosslinked on substrates to furnish, e.g., adhesive-releasing coatings on paper.

Abstract: A composition for controlling foam is disclosed which consists essentially of (A) an organopolysiloxane, (B) a silicon compound having the general formula R.sub.2 SiZ.sub.2, wherein R is a monovalent hydrocarbon group and Z is a hydrolyzable group containing nitrogen, and (C) silica.

Abstract: Compositions are disclosed consisting essentially of: (A) a polydiorganosiloxane fluid in which the organic radicals are predominantly or wholly methyl radicals; (B) a chlorendate diester; (C) a lubricant compound which is an antimony or lead compound of a dialkyldithiocarbamate or dialkylphosphorodithioate; and (D) a block copolymer comprising blocks of polydimethylsiloxane and blocks of polybutadiene or hydrogenated polybutadiene. These compositions are useful as concentrates for replenishing polydiorganosiloxane hydraulic fluids that have become depleted in additives (B) and (C), and as hydraulic fluids having improved resistance to settling of the lubricant compound at low temperatures.