Union Carbide Corporation

Union Carbide Chemicals and Plastics Company, Inc.

Bernard Kanner

George A. Skoler

Bela Prokai

Jennifer M Quirk

Steven P Hopper

Curtis L Schilling

Kenrick M Lewis

Arthur P De Monte

Roswell E King, Iii

Nan S Chu

William B Herdle

Gerald J Murphy

Enrico J Pepe

Errol D Goddard

Donald L Bailey

Jeffrey Y Mui

Rudolph A Cameron

Kunj R Mehta

Steven C Vick

Ravindra D Kulkarni

Dennis J Sepelak

Linda K Kozak

Jeffrey M Larnerd

The invention relates to continuous processes for making cyclic dimethylsiloxane oligomers by reacting in situ methyl bromide, dimethyl ether and activated silicon particles in a direct process reaction zone to produce methylsiloxanes, wherein the proportion of dimethylsiloxane produced in said reaction zone is greater than 75 mole % of the methylsiloxanes produced and recovering the dimethylsiloxane from the reactions zone. The invention favors making cyclic dimethylsiloxane oligomers by this in situ direct reaction.

Direct process for making cyclic dimethylsiloxane oligomers

Direct Synthesis processes for the selective production of organohalohydrosilanes at high rates, selectivities and conversions by the catalytic reaction of activated silicon with mixtures of organohalides and hydrogen in the presence of controlled concentrations of selected metal atoms.

Direct synthesis process for organohalohydrosilanes

There is disclosed a process for producing certain epoxyorganoalkoxysilanes through the rhodium catalyzed hydrosilation of ethylenically unsaturated epoxides and alkoxysilanes in the presence of nitrogenous impurities.

Process for producing epoxyorganoalkoxysilanes

Surfaces containing hydroxyl groups are rendered water-repellent through exposure to hydridoaminosilanes of the general formula

Hydridoaminosilane treatment for rendering surfaces water-repellent

This invention is concerned with novel polysilanes containing olefinic groups which are prepared by reactions of halogen-containing organosilane monomers or mixtures thereof with sodium metal in an appropriate solvent or mixture of solvents. Such polysilane polymers are soluble and thermoplastic, and can be directly converted to silicon carbide compositions by pyrolysis at atmospheric pressure.

Polysilane precursors containing olefinic groups for silicon carbide

Novel O-silylated ketene acetals and enol ethers are prepared via the 1,4-hydrosilation of a hydrosilation composition selected from the group consisting of aminosilanes, siloxanes and alkylalkoxysilanes with an .alpha.,.beta.-unsaturated carbonyl in the presence of a rhodium catalyst.

O-silylated ketene acetals and enol ethers and method of preparation

This invention relates to an improved process for preparing, purifying and/or storing methacryloxy or acryloxy containing organosilicon compounds without the undesirable polymerization normally associated with the methacrylate bonds. In an alternative embodiment, the process is even further improved with the addition of certain stabilizers, and in particular diketone or ketoester stabilizers.

Method for preparing methacryloxy and acryloxy containing organosilanes

A method of preparing silazane polymers, with 3 or more repeating units, of the general formula

Method for making polysilazanes

A novel synthesis for silanes and siloxanes containing olefinic bonds wherein an aminosilane, siloxane alkoxysilane or alkylalkoxysilane and an olefin undergo a dehydrocondensation in the presence of a rhodium or ruthenium catalyst.

Process for the preparation of olefinic silanes and siloxanes

A process for the preparation of halopropyltrialkoxysilanes and halopropylalkylalkoxysilanes comprising the hydrosilation of allyl halides (including substituted allyl halides) with trialkoxysilanes and alkylalkoxy silanes over specific iridium-containing catalysts.

Novel process for the preparation of halopropyltrialkoxysilanes and

This invention relates a process for the redistribution/disproportionation of organohalosilanes utilizing copper halide-aluminum halide complex catalysts.

Process for preparing organohalosilanes utilizing copper halide-aluminum

A process is disclosed for the direct synthesis of cyclic and oligomeric organosiloxanes, such as dimethylsiloxanes, comprising reacting a hydrocarbon ether and a hydrocarbon halide with a fluidized or agitated bed of activated silicon particles with a maximum contact time of five minutes, and continuously withdrawing products from that reaction.

Direct process for preparing dimethylsiloxanes

A process for preparing vinyl-tri-t-oxysilanes by reacting a tri-t-alkoxysilane with an alkyne in the presence of a platinum hydrosilation catalyst at a reaction temperature greater than 150.degree. C. forms a vinyl-tri-t-alkoxysilane in high yields and of high quality.

Process for preparing vinyl-tri-(tertiary substituted) alkoxysilanes

A process for preparing vinylaminosilanes in which an aminosilane of the formula HSi(NRR').sub.x (R').sub.3-x is reacted with an alkyne of the formula R''C.tbd.CH in which R and R' are each saturated or unsaturated aliphatic hydrocarbon radicals or an aromatic hydrocarbon radical, R' and R'' are the same or different and are each hydrogen or R and x is an integer from 1 to 3, in the presence of a platinum hydrosilation catalyst at reaction temperatures above about 180.degree. C.

Process for preparing vinylaminosilanes

Triacetoxysilanes are prepared by adding a tris(amino)silane to acetic anhydride and maintaining the reaction mix at a temperature no greater than about 50.degree. C.

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West Nyack, NY, United States of America

Bernard Kanner