Union Carbide Corporation

Union Carbide Chemicals & Plastics Technology Corporation

Osi Specialties, Inc.

Crompton Gmbh

James D Reedy

David D Farris

Feyyaz O Baskent

Paul E Austin

Kenneth W Hartman

Kunj R Mehta

James S Ritscher

Philbert E Ramdatt

Charles H Blevins

Harold D Furbee

Raymond L Cobb

John J Walsh

Gail D DiSalvo

Richard T Robertson

Richard A Lehew

Paul H Paugh

Thomas Harold Barker

Jerome Henegar

Daniel Pittner

A method is provided for preparing sulfur-containing silane coupling agents by reacting an alkoxysilane acetal with a sulfurating agent. The sulfur-containing silane coupling agents so prepared include certain novel mercapto silanes, and are useful in providing rubber tires with improved properties.

Sulfur-containing silane coupling agents

Surfactants for conventional flexible polyurethane foam may be improved by the addition of a minor amount of an organic acid salt.

Surfactant composition for flexible polyurethane foam

The present invention provides a class of surface-active siloxane compounds each having a single reactive alkoxysilane moiety. The siloxane compounds are linear or cyclic and are reactive to moisture and to compositions having hydroxyl-functionality.

Surface-active siloxane coating compounds and their use in coatings

Compositions including silicone surfactants of the type used in manufacturing urethane foams and certain siloxane-oxyalkylene copolymers which act as cell openers when employed in combination with silicone surfactants in urethane foam manufacture are disclosed and claimed, as are urethane foam compositions including such cell operers, a method of preparing urethane foams using such cell operers, and urethane foams prepared by the method.

Cell openers for urethane foam surfactants

A process and a catalytic composition for carrying out a platinum catalyzed hydrosilylation reaction between an SiH-containing material and a terminal olefin. The process of the invention involves heating the reactants in the presence of a platinum catalyst and a promoter which is a hindered amine or phosphine, or acid salt thereof, the promoter containing at least 6 carbon atoms and having the formula ##STR1## Q is N or P; when Q is N, R is H, alkyl of 1-18 carbon atoms, nonterminal alkenyl of 4-18 carbon atoms, arylalkyl of 7-25 carbon atoms, or a derivative thereof; when Q is P, R is alkyl of 1-18 carbon atoms, nonterminal alkenyl of 4-18 carbon atoms, arylalkyl of 7-25 carbon atoms, or a derivative thereof; x is 0 or 1; R' is alkyl of 1-18 carbon atoms, nonterminal alkenyl of 4-18 carbon atoms, arylalkyl of 7-25 carbon atoms, or a derivative thereof; y is 0, 1, or 2; R' is a branched group having a 2.degree. or 3.degree. carbon atom bonded directly to Q, and is alkyl of 3-18 carbon atoms, nonterminal alkenyl of 4-18 carbon atoms, arylalkyl of 7-25 carbon atoms, or a derivative thereof; z is 1, 2, or 3 and z=3-x-y; and two R' groups, two R' groups, or one R' and one R' may be taken together to constitute a divalent moiety forming a 5-7 membered ring containing a Q atom. The catalytic composition comprises a catalytically active platinum-containing material and a promoter as defined above.

Process and composition for promoting hydrosilylation reactions using

An improved process is provided for the preparation of siloxane-oxyalkylene block copolymer surfactant compositions which utilized a hydrosilation reaction with high boiling point polar polyols as the reaction solvent. The reaction solvent need not be removed from the block copolymer, particularly when the block copolymer is used as a surfactant for polyurethane foam formulations. Dipropylene glycol is the preferred polar solvent and when used in the preparation of the surfactants need not be removed when the surfactants are employed in the preparation of urethane foams.

Process for the preparation of organopolysiloxane surfactants

An improved process is provided for the preparation of siloxane-oxyalkylene copolymers by a solventless process via hydrosilation of oxyethylene-rich polyethers in the presence of carboxylic acids or carboxylic acid salts as a catalyst modifier. The use of a carboxylic acid or salt prevents acetal formation through the hydroxyl groups of the polyether and/or copolymer. The use of solvent, acetal treatment and solvent stripping steps of the conventional processes are eliminated and accordingly, environmental as well as economic benefits are achieved.

Process for the preparation of siloxane-oxyalkylene copolymers

Method for producing decamethylcyclopentasiloxane (cyclic pentamer) from octamethylcyclotetrasiloxane (cyclic tetramer) by heating said cyclic tetramer in the presence of an aqueous hydrochloric acid solution and a salt of a protonated amine having at least one nitrogen-bonded monovalent hydrocarbon group having 5 to 14 carbon atoms.

Process for converting octamethylcyclotetrasiloxane to

Reaction of silylamine with a metallic carboxylate produces siloxylated organometallic compounds with M--O--Si bonds. These siloxylated organometallic compounds are useful catalysts in the preparation of urethane foams and elastomers, especially when prepared in situ with the urethane foam or elastomer reactants.

Preparation of siloxylated metal-containing catalysts

Ferrosiloxane compounds prepared by reacting iron carboxylates and N,N-disubstituted silylamines are useful as thermal stabilizers for diorganopolysiloxanes. The thermally stable diorganopolysiloxanes find utility as heat transfer fluids, high temperature lubricants, hydraulic fluids and electric insulating fluids, to name but a few.

Ferrosiloxane thermal stabilizers for diorganopolysiloxanes

Ethylene carbonate is used as a heat storage medium in a process for the storage of heat wherein the medium changes phase during the release and absorption of heat.

Ethylene carbonate as a phase-change heat storage medium

A process for manufacturing low density high resilience polyurethane foams utilizing as a foam stabilizer selected low molecular weight alkoxysilicon compositions containing from one to 18 silicon atoms in which the alkoxy-modifying group contains from 5 to 18 carbon atoms; solutions of such alkoxysilicon compositions; and the foams derived from such process.

Use of alkoxysilicon compositions as foam stabilizers in high resilience

Organosiloxane copolymers containing alkyl groups having from 5 to 20 carbon atoms that have beneficial utility as foam stabilizers in the manufacture of low density high resilience polyurethane foam; solutions of such copolymers; a process for producing low density high resilience polyurethane foam utilizing as a foam stabilizer said organosiloxane copolymers; and the foams derived therefrom.

Alkyl-modified siloxane copolymers useful as foam stabilizers in high

This invention relates to alkoxysiloxanes characterized by alkoxy endblocking groups derived from alcohols having boiling points and solidification points in particular ranges. The novel alkoxysiloxanes are especially useful as hydraulic fluids (e.g., brake fluids).

Alkoxysiloxane hydraulic fluids

The present invention relates to a method for producing high yields of hydrocarbon chlorosilanes by reacting polysilanes with alkyl or alkenyl chloride at a temperature ranging from about 10.degree. C to about 60.degree. C in the presence of a co-catalyst system. The co-catalyst system is comprised of a combined catalytic amount of co-catalyst (a) and co-catalyst (b), wherein co-catalyst (a) is selected from the group consisting of R'.sub.3 N, R'.sub.3 NHCl, R'.sub.4 NCl and R'.sub.4 PCl wherein R' is one or more of an alkyl or aralkyl radical of from 1 to 18 carbon atoms and co-catalyst (b) is selected from the group consisting of metal salts and metal complexes.

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Marietta, OH, United States of America

James D Reedy