Huels Aktiengesellschaft

Huels Troisdorf Ag

Hans-Joachim Koetzsch

Hans-Guenther Srebny

Claus-Dietrich Seiler

Jaroslaw Monkiewicz

Burkhard Standke

Michael Horn

Albert Frings

Frank Kropfgans

Hartwig Rauleder

Peter Jenkner

Hans-Joachim Vahlensieck

Christine Fliedner

Cyclic silane esters and solvolysis products thereof and processes for making these materials. The cyclic silanes and their solvolysis products are useful as adhesives, crosslinking agents and reagents for modifying polymers containing ester groups.

Cyclic silane esters and solvolysis products thereof, and processes for

The invention relates to a process for preparing amino-functional organosilanes which are low in chlorofunctional organosilanes or essentially free of chlorofunctional organosilanes, by reacting chloro-functional organosilanes with organic amines or ammonia and separating off the organic ammonium chlorides and/or the ammonium chloride thus formed, wherein the small amounts of chloro-functional organosilanes which have not reacted with ammonia or alkylamines are reacted by addition of at least one metal alkoxide in a reaction downstream of the aminosilane synthesis.

Process for preparing amino-functional organosilanes low in or free of

Water-based organopolysiloxane-containing compositions which are essentially free from organic solvents, have a flashpoint above 80.degree. C., and essentially liberate no alcohols by hydrolysis on dilution with water are obtainable by mixing water-soluble aminoalkylalkoxysilanes with alkyltrialkoxysilanes and/or dialkyldialkoxysilanes and/or mixtures of alkyltrialkoxysilanes and dialkyldialkoxysilanes which are not water-soluble, adding water to the mixture, adjusting the pH of the reaction mixture to a value of between 1 and 8 and removing any alcohol already present and/or formed during the reaction. Such compositions are especially useful for hydrophobicizing the surface of building materials such as brick, concrete, lime sand brick, and mortar.

Water-based organic polysiloxane-containing compositions, processes for

Process for preparing alkylhydrogenchlorosilanes

3-Acryloyloxypropylalkoxysilanes of formula I:

Process for the preparation of 3-acryloyloxypropylalkoxysilanes

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.

Process for preparing low-chloride or chloride-free aminofunctional

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.

Process for the preparation of 3-halo-and pseudohalo-alkylsilane esters

Process for preparing aminopropylalkoxysilanes in the presence of shaped

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.

Process for preparing hydrogenalkoxysilanes

A method for the cleavage of organosiloxanes with chlorosilanes in the presence of ferric chloride and hydrogen chloride as catalysts resulting in chloroalkyl silanes or chloroaryl silanes, and organosiloxanes, which are characterized by one or more --O--Si--R.sub.3 groups, (R.dbd.alkyl or aryl), which are directly bound to a silicon atom which in turn is bound either to the same grouping or to an alkyl or aryl moiety.

Growing community of inventors

Rheinfelden, Germany

Hans-Joachim Koetzsch