Abstract: A synthetic aluminosilicate was prepared by (I) forming a gel by hydrolysis, with water or a mixture of water and alkanol, at a pH of 7.0 to 9.5, of (a) 10 to 90 mol percent of monomeric and/or polymeric silicic acid ester and 90 to 10 mol percent of aluminum alcoholate, based on the total amount of silicon and aluminum atoms, and (b) a doping agent selected from a compound of boron or a metal other than aluminum, which is soluble in water, alkanol or a mixture of water and alkanol, in an amount of from 0.1 to 5.0% by weight based on the total weight of the silicon and aluminum compound, and (II) heating the resultant gel to at least 200.degree. C.

Abstract: Organopolysiloxane compositions which comprise (A) a salt of a water-soluble organic or inorganic acid and an organopolysiloxane which has at least one SiC-bonded organic radical containing basic nitrogen, and (B) an alkoxylated alcohol and also, optionally, (C) a salt of a water-insoluble organic acid and an organopolysiloxane, which has at least one SiC-bonded organic radical containing basic nitrogen.

Abstract: Silanes containing hydrogen atoms bonded directly to silicon produced as by-products during methylchlorosilane synthesis are reacted with chlorohydrocarbons in the presence of palladium or platinum as catalysts to give the corresponding chlorosilanes.

Abstract: Methylchlorosilanes are prepared from silicon and methyl chloride in the presence of a copper catalyst and optionally promoter substances, the production rates of the individual methylchlorosilanes, based on the surface area of the silicon employed, being controlled by the structural parameter QF of the silicon. The structural parameter QF is determined by(a) cutting up silicon test specimens to form a cut surface.(b) totaling on the cut surface the areas of the precipitates of intermetallic phases having a longitudinal shape to give an area number A,(c) totaling on the cut surface the areas of precipitates of intermetallic phases having a circular shape to give an area number B, and(d) obtaining the quotient of the area number A and the area number B, called the structural parameter QF.

Abstract: Blowing agent compositions (a) comprising aqueous emulsions containing organopolysiloxanes (1), emulsifiers (2), water (3) and thickeners (4) which may be used in the preparation of elastomeric silicone foams.The blowing agent compositions are used in curable compositions to form elastomeric silicone foams which comprise the blowing agent compositions (a), diorganopolysiloxanes (b), crosslinking agents (c) and, if appropriate, crosslinking catalysts (d) and optionally fillers (e). Elastomeric silicone foams are prepared by mixing the blowing agent compositions (a), with curable organopolysiloxane compositions containing diorganopolysiloxanes (b), crosslinking agents (c) and, if appropriate, crosslinking catalysts (d) and optionally fillers (e) and also optionally additional substances and then the resultant mixture is cured at temperatures in the range of from 100.degree. to 250.degree. C. with simultaneous foaming to form the elastomeric silicone foams.

Abstract: The invention relates to aqueous dispersions of plastics having a solids content of 30 to 70% by weight and a reduced formaldehyde content, based on polymers of one or more monomers from the group comprising acrylic acid esters, methacrylic acid esters, vinyl esters, olefins, vinyl halides, vinylaromatics and ethylenically unsaturated carboxylic acids and amides thereof, and a content of 0 to 10% by weight, based on the total weight of the polymer, of N-alkylamides and/or N-alkoxyalkylamides of ethylenically unsaturated carboxylic acids, wherein the dispersion contains 0.05 to 10% by weight, based on the polymer, of one or more peroxy compounds from the group comprising hydrogen peroxide, organic peroxides, perborates, percarbonates, persulfates and perphosphates.

Abstract: Organo(poly)siloxanes composed of units of the formula [R.sub.a R.sup.1.sub.3-a SiO.sub.1/2 ], [R.sub.b R.sup.1.sub.2-b SiO.sub.2/2 ] and [R.sup.1 SiO.sub.3/2 ], in which R can be the same or different and represents a monovalent organic radical which is free from aliphatic carbon-carbon multiple bonding, R.sup.1 can be the same or different and represents a monovalent organic radical which has at least one aliphatic carbon-carbon multiple bond, a is 0, 1 or 2 and b is 0 or 1.

Abstract: The invention relates to coating compositions for producing watertight, vapor-permeable and flame-retardant coatings, comprising a vinyl chloride copolymer or vinyl acetate/ethylene dispersion, flameproofing agents, foam stabilizer and optionally crosslinkers. The invention further relates to a process for producing watertight, vapor-permeable and flame-retardant coatings by mechanically foaming the coating composition to produce a stable foam, applying the foam to a woven, knitted or nonwoven support material on one or both of the sides and drying it at a temperature of from 60.degree. to 80.degree. C. and optionally, after drying, compressing the foam layer. The textile support materials coated with the coating composition are suitable for use in building protection and in the geotextile sector.

Abstract: The present invention is directed to a process for the preparation of a finely divided vinyl chloride graft copolymer and to the use of this product as a viscosity-reducing agent for plastisols.

Abstract: Finely divided copper powder suitable for the preparation of copper catalyst for the synthesis of methylchlorosilane is prepared by adding an aqueous copper salt solution to an aqueous suspension of iron powder. Copper salt solutions obtained as process residues from the synthesis of methylchlorosilane can be used in the process of this invention.

Abstract: Graft copolymers having improved phase binding between the graft base and the grafted-on polymer, are prepared from:a) a grafted-on polymer phase containing one or more monomers from the group consisting of (meth)acrylates of alcohols having 1 to 10 carbon atoms, vinyl esters of saturated aliphatic carboxylic acids having 2 to 10 carbon atoms, olefins, vinyl halides, styrene and styrene derivatives, andb) a peroxy group-containing copolymer phase containing from 0.01 to 20% by weight of an olefinically unsaturated peroxy compound of the general formula I or II ##STR1## where R.sup.1 is a chemical bond or a linear or branched alkyl chain having 1 to 10 carbon atoms or a cycloalkyl group having 3 to 10 carbon atoms, R.sup.2 and R.sup.3 are an alkyl group having 1 to 4 carbon atoms, R.sup.4 is an alkyl group or an alkyl-substituted phenyl group having 3 to 12 carbon atoms, and R.sup.5 is a cycloalkyl group having 3 to 12 carbon atoms, and from 80 to 99.

Abstract: Organo(poly)siloxanes with siloxane units at the end of the chain having organyloxy and hydrogen groups are disclosed as well as a process for producing the same by reacting .alpha.,w-dihydroxyorgan(poly)siloxanes with silanes having a group that can be easily separated and their use in organo(poly)siloxane mixtures that can be stored in the absence of water but which can be cross-linked into elastomers at ambient temperature in the presence of water. Also, a process is disclosed for producing organopolysiloxane elastomers by cross-linking cross-linkable mixtures by addition of Si-linked hydrogen to SiC-linked residues with aliphatic carbon-carbon multiple linkage.

Abstract: The invention relates to a process for preparing polyorganosiloxane-containing emulsions having a mean particle size of less than 0.3 .mu.m in which, in a first step,(A) a concentrate is prepared by mixing a polyorganosiloxane with water and an emulsifier which is soluble in the polyorganosiloxane.and, in a second step,(B) the concentrate thus obtained is diluted with water to the desired polyorganosiloxane concentration.These emulsions can be used for impregnating fibres and fabrics.

Abstract: The present invention is a process wherein silanes containing hydrogen atoms bonded directly to silicon are removed from silanes of the general formulaR.sub.x Cl.sub.3-x Si--[SiR.sub.y Cl.sub.2-y ].sub.n --A (I)and mixtures thereof, in which R denotes an optionally halogen-substituted hydrocarbon radical having 1 to 18 carbon atoms which is free from ethylenic double bonds, A denotes a chlorine atom or a radical R, x has the value of 0, 1, 2 or 3, y has the value of 0, 1 or 2 and n has the value of 0 or 1. The silanes containing hydrogen atoms bonded directly to silicon are reacted with hydrogen chloride in the presence of silver or gold as catalysts to give the corresponding chlorosilanes.

Abstract: The present invention relates to a process for preparing coating compositions which comprises condensing a mixture containing (A) at least one silicone resin containing Si-bonded alkoxy groups and, if desired, silanol groups and/or at least one silane and/or siloxane which contains Si-bonded alkoxy groups and, if desired, silanol groups to form a silicone resin, (B) a basic condensation catalyst in an amount sufficient to render this mixture basic, (C) optionally water and (D) optionally an organic solvent.The resultant coating compositions are preferably employed in the form of a solution, emulsion or dispersion.

Abstract: Emulsions which are prepared by reacting (A) an organopolysiloxane which has at least one monovalent SiC-bonded radical with primary and/or secondary amino groups, with (B) a carboxylic acid anhydride in the presence of (C) an emulsifier and (D) an aqueous phase. These emulsions are suitable as textile treating agents.

Abstract: The invention relates to aqueous contact adhesive dispersions containing, based on the total weight of the dispersion, from 40 to 70% by weight of a copolymer prepared by emulsion polymerization, where the copolymer containsa) from 40 to 70% by weight of vinyl esters of aliphatic carboxylic acids having 2 to 12 carbon atoms,b) from 10 to 40% by weight of acrylic acid esters of aliphatic alcohols having 4 to 12 carbon atoms,c) from 8 to 15% by weight of methacrylic acid esters of aliphatic alcohols having 4 to 12 carbon atoms,d) from 0.1 to 3% by weight of ethylenically unsaturated compounds which cause cross-linking,e) from 0.1 to 5% by weight of ethylenically unsaturated carboxylic acids,f) from 0.1 to 2% by weight of substituted and unsubstituted (meth)acrylamides,g) from 0.5 to 3% by weight of ethylenically unsaturated hydroxyalkyl-functional compounds, andh) from 0.5 to 3% by weight of ethylenically unsaturated sulfates and/or sulfonates.

Abstract: The invention relates to adhesive compositions for gluing wood containing aqueous vinyl ester graft copolymer dispersions and water-soluble acid metal salts or free acids, in which the adhesive compositions exhibit outstanding resistance to hot water and have high storage stability. The vinyl ester graft copolymer comprises from 2 to 12 percent by weight, based on the total weight of the graft copolymer, of one or more polyvinyl alcohols having a degree of hydrolysis of from 60 to 99 mol persent and 88 to 98 percent by weight, based on the total weight of the graft copolymer, of a grafting monomer mixture. The grafting monomer mixture contains from 5 to 50 percent by weight, based on the total weight of the monomer mixture, of vinyl esters of saturated, highly branched aliphatic monocarboxylic acids having 9 or 10 carbon atoms, vinyl pivalate, diisopropyl maleate, diisopropyl fumarate, vinyl chloride and mixtures thereof.

Abstract: A process for separating methylchlorosilanes from high boiling residues from the methylchlorosilane synthesis, in which cleavable methylchlorodisilanes which are present in the residues and which have at least two chlorine atoms attached to one silicon atom are cleaved with hydrogen chloride in the presence of a catalyst which remains in the reaction mixture, which comprises cleaving the methylchlorodisilanes in the presence of by-products which are more volatile than the cleavable methylchlorodisilanes in the high boiling residues from the methylchlorosilane synthesis which have a boiling point of at least 70.degree. C. under normal conditions and continuously removing the more volatile by-products from the reaction mixture along with the methylchlorosilanes and the noncleavable methylchlorodisilanes.

Abstract: A process for preparing organopolysiloxane hydrosols by mixing an organosilicon compound with water, which comprises mixing a silane of the formulaR.sub.a Si(OR.sup.1).sub.4-a (I)where a is 0, 1, 2 or 3, R can be the same or different and is a hydrogen atom or a monovalent organic radical, R.sup.1 can be the same or different and is a monovalent organic radical, and/or a partial hydrolysis product thereof and, optionally, an organodisiloxane of the formulaR.sup.2.sub.3 Si-O-SiR.sup.2.sub.3 (II)where R.sup.2 can be the same or different and is the same as R, with water in the presence of an emulsifier at a temperature below 15.degree. C.