Abstract: 3-Acryloyloxypropylalkoxysilanes of formula I:CH.sub.2 .dbd.C(R)C(O)O(CH.sub.2).sub.3 Si(R.sup.1).sub.a (OR.sup.2).sub.3-a (I)are prepared by reacting a hydridosilane of formula II:HSi(R.sup.1).sub.a (OR.sup.2).sub.3-a (II)with an allyl ester of formula III:CH.sub.2 .dbd.C(R)C(O)OCH.sub.2 CH.dbd.CH.sub.2 (III),where R is a hydrogen atom or a methyl group, R.sup.1 and R.sup.2 are each C.sub.1 to C.sub.6 alkyl groups or phenyl groups, and a is 0, 1 or 2, in the presence of a platinum catalyst.

Abstract: The invention relates to water-based organopolysiloxane containing compositions which are essentially free from organic solvents, have a flash point above 70.degree. C. and essentially liberate no alcohols by hydrolysis on dilution with water. The organopolysiloxane-containing compositions according to the invention are obtainable by mixing M mol of water-insoluble organotrialkoxysilanes with Q mol of water-soluble aminoalkylalkoxysilanes in a molar ratio of 0<M/Q.ltoreq.2, adding water to the mixture, adjusting the pH of the reaction mixture to a value of between 1 and 8 and removing alcohol already present and/or formed during the reaction. The process for the preparation of the organopolysiloxane-containing compositions according to the invention and their use are also disclosed.

Abstract: The present invention relates to a process for preparing low-chloride or chloride-free aminofunctional organosilanes by reacting chlorofunctional organosilanes with organic amines or ammonia and separating off the organic hydrochlorides or ammonium chloride thus formed, wherein further amounts of organic hydrochlorides or ammonium chloride present are reacted by addition of metal alkoxides dissolved in alcohols and the metal chlorides formed are separated off, and also to aminofunctional organosilanes prepared thereby.

Abstract: 3-Halo- and pseudohalo-alkylsilane esters are prepared by reacting an allyl X compound or a compound containing an allyl X structure with a hydridosilane ester in the presence of an iridium catalyst prepared under specific conditions and/or the reaction medium containing a 0.01-100 mol % excess of the allyl X compound or compound containing the allyl X unit relative to the amount of hydridosilane ester reactant.

Abstract: Disclosed are organosilane polycondensation products prepared by hydrolysis of an hydrogen salt of an aminosilane compound or by hydrolysis of an aminosilane followed by reaction with an alkyl salt. The compounds are useful in forming stable aqueous solutions and as adhesion promoters between inorganic and organic surfaces.

Abstract: Aminopropylalkoxysilanes of formula (I):R.sup.2 R.sup.3 NCH.sub.2 CHR.sup.4 CH.sub.2 Si(OR).sub.3-n (R.sup.1).sub.n(I)are prepared by reacting hydrogensilanes of formula (II):HSi(OR).sub.3n (R.sup.1).sub.n (II)with an amine of formula (III):R.sup.2 R.sup.3 NCH.sub.2 CR.sup.4 .dbd.CH.sub.2 (III),where R and R.sup.1 are alkyl radicals having from 1 to 8 carbon atoms and n is equal to 0, 1 or 2 andR.sup.2 and R.sup.3 are hydrogen, alkyl radicals having from 1 to 8 carbon atoms, .omega.-alkenyl radicals having from 3 to 8 carbon atoms or combinations thereof, andR.sup.4 is hydrogen or an alkyl radical having from 1 to 8 carbon atoms, in the presence of a shaped polymeric rhodium complex catalyst containing organosiloxanemonophenylphosphine ligands.

Abstract: Hydrogenalkoxysilanes are prepared by direct reaction of finely divided metallic silicon with alcohols in the presence of copper-containing catalysts in a heat-transfer oil comprising tritoluenes, tetratoluenes or mixtures thereof at from 100.degree. to 350.degree. C.

Abstract: A process for the continuous production of vinylchlorosilanes by reacting vinyl chloride with chlorosilanes at elevated temperature consists of a heatable reaction tube having an internal diameter d.sub.1 and a tubular displacement body having an external diameter d.sub.2 mounted within the reaction tube in an axially symmetrical arrangement and extending over the entire length of the reaction tube, the diameter d.sub.2 being smaller than the diameter d.sub.1.

Abstract: Novel (2-methyl-3-chloropropyl)-cyclohexyl-dialkoxysilanes are prepared by reacting a (2-methyl-3-chloropropyl)-cyclohexyldichlorosilane with a corresponding alcohol. The novel compounds are useful for the modification of silicones.

Abstract: The novel compound 2-methyl-3-chloropropyl-cyclohexyldichlorosilane is prepared by reacting cyclohexyldichlorosilane with 2-methyl-3-chloropropene or by reacting 2-methyl-3-chloropropyldichlorosilane with cyclohexene, each in the presence of platinum or a platinum compound.

Abstract: Di-tert.butoxydiacetoxysilane is prepared by reacting tetraacetoxysilane with tert.butanol at a reaction temperature of up to 60.degree. C., and the resulting di-tert.butoxydiacetoxysilane is isolated.

Abstract: Acyloxysilanes and carboxylic acid chlorides can be prepared simultaneously and continuously from organochlorosilanes and monocarboxylic acid anhydrides. Catalytically active amounts of organic bases soluble in the reaction mixture, their salts or organic acid amides are employed here.

Abstract: 3-chloropropylsilanes are prepared from hydrogensilanes and allyl chloride, where a stoichiometric excess of allyl chloride is maintained in the condensate of the vapor emitted by the boiling reactant mixture.

Abstract: Mercaptosilanes are prepared from haloorganylsilyl compounds and an alkali metal hydrogen sulfide in the presence of a polar, aprotic medium.

Abstract: Discoloration of vinylacetoxysilanes is prevented by adding thereto 25 to 500 ppm, based on the amount of vinylacetoxysilane, of 3,5-di-tert.-butylpyrocatechol, 2,6-di-tert.-butyl-4-methylphenol, 2-mercaptobenzimidazole or a mixture thereof.

Abstract: The manufacture of vinyltrichlorosilane by reacting vinylchloride with trichlorosilane at a temperature of 400.degree. to 750.degree. C. in a tubular reactor with a rotating displacement body axial-symmetrically disposed therein is improved by heating the reactants to a temperature of 120.degree. to 400.degree. C. prior to their introduction into the reactor.

Abstract: A circuit arrangement for transmitting variable measurement values, such as pressure and temperature, at vehicle wheels is provided which transmits the measurement values in the form of H-F signals to a stationary evaluating circuit (12) with great accuracy, high reliability and in short time intervals. A repeater coil (b 13), which is connected with the latter, arranged in the vicinity of the wheel so as to be stationary and connected to voltage by a square-wave generator (15), cooperates with a revolving repeated coil (19) which is fastened at the vehicle wheel and connected with a sensor circuit arrangement (20) supplied by it.

Abstract: In a method of preparing cyanoalkyl-akoxysilanes, which is suitable for the production of these silanes on a large technical scale, the reaction of a chloroalkyl-alkoxysilane with an alkali metal cyanide in the presence of a solvent takes place in a stirring reactor which is provided with means for loading these starting materials and with an outlet opening for the alkali metal chloride by-product, and which is connected through a bypass valve to a column with a superimposed condenser. After the reaction in the reactor has ended, first the solvent is distilled out through the column and then the main part of the cyanosilane, and then the rest of the cyanosilane is distilled out while bypassing the column. The alkali metal chloride is then removed from the reactor through a lock.

Abstract: The present invention relates to mercaptoalkyl alkoxysilanes and the permanent removal of the odorants contained in these compounds. These odorants form during the preparation of the said mercaptosilanes from halogen alkylsilanes with thiourea and ammonia. The removal of the odorants is performed by the admixture of compounds which contain oxirane groups. A subsequent purification, e.g., by distillation, after the addition of these compounds in accordance with the invention, is not necessary. The additive used in accordance with the invention also brings about a sustaining of the freedom from odor for several months.

Abstract: A method for the preparation of 2-chloroethyldichlorosilanes by the reaction of vinyldichlorosilanes with hydrogen chloride in the presence of ferric chloride or tantalum chloride is disclosed. In the presence of these anhydrous metal chlorides, this reaction can be performed in the temperature range between 30.degree. and 90.degree. C., without the formation to any appreciable extent of methyl or ethyl trichlorosilane or other cleavage products. The end products obtained can also be easily separated from the byproducts by vacuum distillation without the need to resort to additional measures. The vacuum distillation can also be performed in the presence of the metal chlorides.