Abstract: The invention relates to aqueous emulsions containing (A) organo-hydrogenated polysiloxanes optionally mixed with organopolysiloxanes free of Si linked hydrogen and organyloxy groups, (B) organopolysiloxanes containing organyloxy groups as stabilizers, (C) emulsifiers and (D) water.

Abstract: Fabrics coated with an organopolysiloxane composition containing (a) an organopolysiloxane having aliphatic unsaturation, (b) an organohydrogenpolysiloxane having SiH groups in which the silicon to hydrogen ratio is from 10:1 to 1:1, (c) a catalyst which is capable of promoting the addition of SiH groups to the aliphatically unsaturated groups, (d) a hydrophobic silica filler, (e) a flame retardant and optionally an adhesion promoting agent.The coated fabric can be used in manufacturing air bags for automobiles.

Abstract: Compositions which may be crosslinked to form adhesive-repellent coatings having increased separation values, comprising organopolysiloxanes in which at least 95 mol percent of the siloxane units have the formulaHR.sup.1 C.dbd.CR.sup.2 COOR.sup.3 SiR.sub.2 O.sub.1/2,where R is a monovalent hydrocarbon radical or a halogenated monovalent hydrocarbon radical, R.sup.1 is hydrogen or a halogenated phenyl radical, R.sup.2 is hydrogen or an alkyl radical having from 1 to 4 carbon atoms, R.sup.3 is a divalent hydrocarbon radical or a halogenated divalent hydrocarbon radical, in which the organopolysiloxanes also contain siloxane units of the formulasHSR.sup.4 SiRO and R.sub.2.sup.5 SiOin which R is the same as above, R.sup.4 is a divalent hydrocarbon radical, R.sup.5 is the same as R or a hydrocarbon radical substituted with the HR.sup.1 C.dbd.CR.sup.2 COO group, where R.sup.1 and R.sup.

Abstract: Organo(poly)siloxanes having halogen bonded directly to silicon, or acetoxysiloxanes are prepared by reacting organo(poly)siloxanes having hydrogen bonded directly to silicon, with an allyl compound in the presence of metallic palladium, ruthenium or rhodium, or an acetylacetone or phosphine complex, or compound containing palladium, ruthenium or rhodium in which the allyl compound is an allyl halide having 3 carbon atoms per molecule or allyl acetate.

Abstract: Organosilyl carbonates, such as bis(trimethylsilyl)carbonate, are prepared by reacting an organohalosilane with an alkali bicarbonate in the presence of an amine and/or a phosphine and an aprotic solvent, preferably a polar solvent which is inert to the reactants. The resultant mixture is separated from the ammonium halide and/or phosphonium halide and the organosilyl carbonate is recovered from the halide-free mixture.

Abstract: Organopolysiloxanes having the formulasA.sub.x R.sub.3-x SiO(SiR.sub.2-x A.sub.x O).sub.n SiR.sub.3-x A.sub.xor(SiR.sub.2-x A.sub.x O).sub.y,where R is a monovalent hydrocarbon radical or a halogenated monovalent hydrocarbon radical or a monovalent aliphatic radical consisting of carbon, hydrogen, ether oxygen and fluorine atoms; A is a SiC-bonded organic radical containing a carboxyl group and a carbonyl group to which is bonded an organic radical having at least one terminal carbon-carbon double bond; n is an integer having a value of at least 1; x is 0 or 1; and y is an integer having a value of from 3 to 10, in which the organopolysiloxanes contain at least one radical represented by A per molecule.

Abstract: Organopolysiloxanes having a viscosity of at least 100 mPa.s at 25.degree. C. and having both SiC-bonded acryloxyalkyl groups and Si-bonded hydrogen atoms in the same molecule are described herein. These are preferably prepared by adding an allyl alcohol to diorganopolysiloxanes containing an Si-bonded hydrogen atom in each of their terminal units, then esterifying the hydroxyl groups of the resultant reaction product with acrylic acid and subsequently equilibrating the resultant diorganopolysiloxanes containing an SiC-bonded acryloxypropyl group in each of their terminal units, with organo(poly)siloxanes containing an Si-bonded hydroxyl group in each of their terminal units, in which the organo(poly)siloxanes contain methylhydrogensiloxane units and optionally diorganosiloxane units of the formulaR.sub.2 SiOas well as other organo(poly)siloxanes.

Abstract: Organopolysiloxane compositions that are crosslinked by ultraviolet light comprising (A) an organopolysiloxane having units of the formulaHR.sup.1 C=CR.sup.2 COOR.sup.3 SiR.sub.2 O.sub.1/2,in which at least two such siloxane units are present per molecule of organopolysiloxane (A) and at least 80 percent of the number of the remaining siloxane units in organopolysiloxane (A) comprise units of the formulaR.sub.2 SiO,where R is a monovalent hydrocarbon radical or a halogenated monovalent hydrocarbon radical, R.sup.1 is hydrogen or a halogenated phenyl radical, R.sup.2 is hydrogen or an alkyl radical having from 1 to 4 carbon atoms per radical and R.sup.3 is a divalent hydrocarbon radical or a halogenated divalent hydrocarbon radical, in which the organopolysiloxane (A) has an average viscosity of from 20 to 5000 mPa.s at 25.degree. C., (B) an organopolysiloxane terminated by units of the formula R.sub.3 SiO.sub.178 , and having from 0.05 to 5 mole percent of units of the formula ##EQU1## wherein R and R.sup.

Abstract: Organopolysiloxanes which are crosslinked by high energy radiation consisting essentially of siloxane units of the formulas:(a) HR.sup.1 C.dbd.CR.sup.2 COOR.sup.3 SiR.sub.2 O.sub.1/2,(b) HSR.sup.4 SiRO and(c) R.sub.2.sup.5 SiOwhere R is a monovalent hydrocarbon radical or a halogenated monovalent hydrocarbon radical, R.sup.1 is hydrogen or a phenyl radical or a halogenated phenyl radical, R.sup.2 is hydrogen or an alkyl radical having from 1 to 4 carbon atoms per radical and R.sup.3 is a hydrocarbon radical or a halogenated hydrocarbon radical, R.sup.4 is a divalent hydrocarbon radical, R.sup.5 is the same as R or a hydrocarbon radical substituted with the HR.sup.1 C.dbd.CR.sup.2 COO group, where R.sup.1 and R.sup.2 are the same as above, in which two siloxane units of the formulaHR.sup.1 C.dbd.CR.sup.2 COOR.sup.3 SiR.sub.2 O.sub.1/2are present per molecule. These organopolysiloxanes are prepared by equilibrating the corresponding siloxanes in accordance with the conventional methods known in the art.

Abstract: Organopolysiloxanes having a viscosity of at least 100 mPa.s at 25.degree. C. and having both SiC-bonded acryloxyalkyl groups and Si-bonded hydrogen atoms in the same molecule are described herein. These are preferably prepared by adding an allyl alcohol to diorganopolysiloxanes containing an Si-bonded hydrogen atom in each of their terminal units, then esterifying the hydroxyl groups of the resultant reaction product with acrylic acid and subsequently equilibrating the resultant diorganopolysiloxanes containing an SiC-bonded acryloxypropyl group in each of their terminal units, with organo(poly)siloxanes containing an Si-bonded hydroxyl group in each of their terminal units, in which the organo(poly)siloxanes contain methylhydrogensiloxane units and optionally diorganosiloxane units of the formulaR.sub.2 SiOas well as other organo(poly)siloxanes.

Abstract: Organopolysiloxanes having SiC-bonded oxyalkylene units and Si-bonded hydroxyl groups, in which an average of at least 15 mol percent of the siloxane units contain only one SiC-bonded monovalent organic radical and the silicon valences which are not satisfied by the SiC-bonded monovalent organic radical are satisfied by siloxane oxygen atoms or oxygen atoms of hydroxyl groups. These organopolysiloxanes are preferably prepared by reacting triorganosiloxy end-blocked organopolysiloxanes consisting of diorganosiloxane units, in which at least part of these units contain SiC-bonded oxyalkylene units and, if appropriate, organohydrogensiloxane units or organohydroxyl siloxane units or organoalkoxysiloxane units of mixtures of at least two such monoorganosiloxy units with water in the presence of an acid or base or, and subsequently with a silane or simultaneously with water and a silane in which the silane contains one SiC-bonded monovalent organic radical, or partially hydrolyzed products of the silane.

Abstract: Asymmetrical disiloxanes are prepared by reacting (a) a silane containing three SiC-bonded monovalent organic radicals in which at least one may be substituted with Si-bonded hydrogen and an SiOC-bonded monovalent organic radical with (b) a symmetrical disiloxane which is different from the disiloxane obtained from the hydrolysis of silane (a), and contains at least two identical substituents in the presence of water and an acid at a temperature of from -10.degree. to about 50.degree. C.

Abstract: Coatings which have a predetermined degree of adhesive-repellency are prepared by applying to surfaces which are to be rendered adhesive-repellent an organopolysiloxane having Si-bonded hydrogen and an aliphatic multiple bond in the same molecule and a catalyst which promotes the addition of Si-bonded hydrogen to an aliphatic multiple bond, and thereafter crosslinking the organopolysiloxane by the addition of Si-bonded hydrogen to an aliphatic multiple bond. The organopolysiloxane having both an aliphatic multiple bond and Si-bonded hydrogen in the same molecule, has a viscosity of at least 300 mPa.s at 25.degree. C. The adhesive-repellency of the coated substrate is at least partially dependent on the ratio of Si-bonded hydrogen to the aliphatic multiple bond, i.e., the higher the ratio of Si-bonded hydrogen to the aliphatic multiple bond, the lower the adhesive-repellency.

Abstract: Hydrophilic coatings are obtained by applying to a substrate a composition containing an aqueous soluble organopolysiloxane which is capable of being crosslinked by the addition of Si-bonded hydrogen atoms to SiC-bonded aliphatic multiple bonds, and having at least one oxyalkylene unit bonded to a silicon atom and an aqueous soluble catalyst which promotes the addition of Si-bonded hydrogen atoms to the SiC-bonded aliphatic multiple bonds and thereafter crosslinking the organopolysiloxane by the addition of the Si-bonded hydrogen atoms to the SiC-bonded aliphatic multiple bonds to form a hydrophilic coating on the substrate. The aqueous soluble organopolysiloxane may be obtained from a mixture consisting of equal parts of a mixed hydrolysate, prepared from 1.7 moles of dimethyldichlorosilane, 1 mole of [acetoxy-(hexaethyleneoxy)propyl]-methyldichlorosilane and 0.