Abstract: Curable isocyanate prepolymers have been made in which all or a portion of the available isocyanate terminal groups have been reacted with a secondary amine-containing silane monomer having two trialkoxy silane groups.

Abstract: Aromatic silanes are prepared by reacting an aromatic halogen compound with a disilane in the presence of a palladium complex and a phosphite or phosphine.The aromatic silanes obtainable by the process of the invention are valuable intermediates for the preparation of drugs, dyes and pesticides.

Abstract: Active hydrogen-containing compounds are silylated by contacting with trimethylsilyl trichloroacetate at elevated temperatures in the presence of an initiator.

Abstract: The preparation of racemic 1R, 4R, 5R-5-(4', 8'-dimethyl-5'-hydroxy-7'-nonenyl)-5-methyl-8-oxabicyclo[3.2.1]-octane-1-a cetic acid is described. The cycloheptane compounds are active uteroevacuant agents.

Abstract: A process for the preparation of trimethylsilyl cyanide comprising reacting trimethylsilyl chloride with an approximately equimolar amount of an alkali metal cyanide in the presence of a catalytic amount of a heavy metal cyanide and in the presence of an aprotic solvent with a boiling point above about 150.degree. C., at a temperature between about 130.degree. and 250.degree. C. Advantageously the reaction temperature is between about 160.degree. and 220.degree. C., the alkali metal cyanide is sodium cyanide or potassium cyanide, the heavy metal cyanide is copper(I) cyanide, copper(II) cyanide, zinc cyanide or a complex compound of one of them with an alkali metal cyanide and is employed in about 1 to 8 mol % relative to the alkali metal cyanide, and the mixture of aprotic solvent, heavy metal cyanide and alkali metal chloride remaining in the reaction vessel when the reaction has ended is used directly as the reaction medium for a further batch.

Abstract: Alkoxysilylacrylamides, alkoxysilylacrylates and alkoxysilylbenzylidene malonates are provided and a method for making such materials. These alkoxysilanes have been found useful as UV stabilizers and as adhesion promoters when incorporated into silicone compositions useful as top coats for thermoplastic organic polymers.

Abstract: A continuous process for preparing silanes and siloxanes having SiOC groups which comprises (a) introducing in a liquid phase a chlorosilane and a hydroxyl-containing aliphatic compound in parallel flow into a first stage of a first reactor in an amount such that from 0.5 to 0.

Abstract: Novel room temperature curable organopolysiloxane compositions which are stable as ready mixed for a long period of time when kept in an air-tight container and readily curable at room temperature to form rubber-like elastomers when exposed to the moisture-containing air. The composition comprises a diorganopolysiloxane terminated at both chain ends with hydroxy groups, an organosilane having in a molecule 3 or 4 substituted or unsubstituted vinyloxy groups or a partial hydrolysis-condensation product thereof, and an organosilane or an organopolysiloxane having in a molecule at least one monovalent group expressed by the general formula of the type (R.sub.2 N).sub.2 C.dbd.N--, where R is a hydrogen atom or a monovalent hydrocarbon group. The compositions are free from toxicity and offensive odor as well as corrosiveness against various substrate surfaces, especially of metals.

Abstract: The invention provides organosilicon compounds of the formula: ##STR1## in which: n is 1, 2 or 3;each R, which may be identical or different, is a monovalent organic group which contains a carbon-carbon double bond and from 2 to 10 carbon atoms;each R.sub.1, which may be identical or different, is a straight or branched alkyl radical optionally substituted by one or more halogen atoms or cyano groups; an aryl radical or an alkylaryl radical optionally substituted by one or more halogen atoms;R.sub.2 is a straight or branched divalent alkylene or alkylidene radical possessing up to 4 carbon atoms;X is a divalent radical consisting of, or containing, at least one hetero-atom selected from oxygen, sulphur and nitrogen atoms, the radical being attached to the radical R.sub.2 via a said hetero-atom;G is an organic radical of valency (m+1) possessing from 1 to 30 carbon atoms;m is 1, 2 or 3;and each Y, which may be identical or different, is a functional group selected from: --NO.sub.