Dow Corning Corporation

Dce Aprilis, Inc.

Doe Corning Corporation

Peter Y Lo

Paul Charles Dinh

Richard G Taylor

Grish Chandra

Scott S Brown

LeRoy E Thayer

David Joseph Romenesko

Peter Cheshire Hupfield

Maris J Ziemelis

Antony P Wright

Kai Su

Bradley C Bahr

A Wade Lomas

Howard M Bank

Toshio Suzuki

Anthony Revis

Eric S Kolb

Udo C Pernisz

Duane R Bujalski

Jon Vierling Degroot, Jr

Gary T Decker

John Robert Keryk

Linda Denise Kennan

Anil Kumar Saxena

Steven M Evans

Gloria Janik

Yolanda A Peters

Jeff A Gray

A composition includes a siloxane of the formula:(RMeSiO)(MeRSiO)(RSiO)(SiO)wherein a is at least 2, b is from 3 to 20, c is from 0 to 10, d is from 0 to 10, and each R is independently of the formula &#x2014;CR'&#x2014;CR&#x2032;&#x2014;Y&#x2014;Z or CR&#x2032;&#x2014;CR&#x2032;&#x2014;Z, wherein each R&#x2032; is independently a hydrogen atom or a Cto Chydrocarbyl free of aliphatic unsaturation so long as at least one R&#x2032; is a hydrogen atom, Y is a divalent organic group, and Z is a polycyclic group containing at least one aromatic ring. A method of making the siloxane includes charging (HMeSiO)(MeHSiO)(HSiO)(SiO), a platinum catalyst, and an alkene of the formula CR&#x2032;&#x2550;CR&#x2032;&#x2014;Y&#x2014;Z or CR&#x2032;&#x2550;CR&#x2032;&#x2014;Z into a reactor to form the siloxane. The siloxane is useful as a component in holographic storage media for photopolymer-based holographic data storage applications. The siloxane exhibits excellent compatibility when mixed with a polymerizable component before the polymerizable component is cured. Furthermore, the siloxane exhibits excellent diffusion from polymers of the polymerizable component after partial and complete curing. The siloxane also has a high refractive index while maintaining the excellent compatibility and diffusion properties when mixed with polymerizable component.

Composition including a siloxane and a method of forming the same

An impact resistant waveguide includes a clad surrounding a core. A reinforcing filler is incorporated in a curable silicone composition used to prepare the core, thereby imparting impact resistance to the core. A method of manufacture of the waveguide includes injecting the curable silicone composition into a clad made of silicone elastomeric tubing and thereafter curing the curable silicone composition.

Impact resistant optical waveguide and method of manufacture thereof

Method of making copolymers of (i) an acrylic or methacrylic-functional polyisobutylene macromonomer, (ii) a polydiorganosiloxane macromonomer, and optionally (iii) a radical polymerizable monomer such as an alkyl acrylate or alkyl methacrylate. The copolymers are prepared by copolymerizing the monomers in a miniemulsion using a free radical initiator at high temperature. In the method, the monomers are mixed with a surfactant(s) and optionally a cosurfactant(s), and subjected to high shear.

Copolymers of polyorganosiloxane, polyisobutylene, and alkyl acrylates

A hydrosilation process where a silicon hydride is reacted with an unsaturated reactant in the presence of a platinum catalyst and an accelerator selected from a group consisting of ene-yne unsaturated compounds. The accelerators are especially useful for facilitating the hydrosilation of unsaturated reactants where the unsaturation is in the internal portion of the reactant's structure, for example, as in cyclopentene and cyclohexene.

Ene-yne unsaturated compounds as accelerators for hydrosilation

Organosilicon compounds with a siloxane portion and groups of the general formula --OR'OCH.dbd.CHR' (i) linked via an Si--O--C bond, wherein R' is a divalent hydrocarbon radical or a group --R.degree.--(OR.degree.).sub.n --, wherein R.degree. is alkylene and n is from 1 to 12, R' is H or alkyl are useful in radiation curable compositions, in which they are mixed with an initiator. The compositions are particularly useful in UV radiation curable relase coatings.

Organosilicon compounds and compositions containing them

The present invention is a process for the preparation of (piperazinylorgano)silanes. The process involves the contact of an (aminoorgano)silane with piperazine or an organopiperazine, in the presence of palladium black as a catalyst. The process is run at a temperature within a range of about 50.degree. C. to 300.degree. C. in a standard low-pressure type reactor.

Palladium black catalyzed process for preparation of (piperazinylorgano)

Organosilicon compounds with a siloxane portion and groups of the general formula --OR'OCH.dbd.CHR'' (i) linked via an Si--O--C bond, wherein R' is a divalent hydrocarbon radical or a group --R.degree.--(OR.degree.).sub.n --, wherein R.degree. is alkylene and n is from 1 to 12, R'' is H or alkyl are useful in radiation curable compositions, in which they are mixed with an initiator. The compositions are particularly useful in UV radiation curable relase coatings.

The present invention is a method for separating silyl ketene acetals from carbonyl by-products having a terminal olefinic bond and a boiling point similar to that of the silyl ketene acetals. The method employs a platinum catalyst which specifically effects hydrosilation of the carbonyl by-product's terminal olefinic bond by an organohydrosilane. The platinum catalyst is the reaction product of hexachloroplatinic acid and sym-tetramethyldivinyldisiloxane. In a preferred method the silyl ketene acetal is separated from the hydrosilated carbonyl by-product by distillation.

Method for purifying silyl ketene acetals

The present invention is a process for preparation of silyl ketene acetals. The process comprises contacting a mixture containing an organosilane having a silicon-bonded hydrogen (organohydrosilane) and a vinylic compound with RhCl(di-tert-butylsulfide).sub.2 as catalyst at a temperature within a range of about 20.degree. C. to 100.degree. C. The RhCl(di-tert-butylsulfide).sub.2 catalyst demonstrates higher activity than that typically described for rhodium catalysts, allowing for lower concentrations of catalyst and lower reaction temperatures to be used while maintaining high conversion to the desired silyl ketene acetals.

Process for preparation of silyl ketene acetals

Method for preparing a platinum-organosiloxane complex which comprises reacting a platinous halide with an organo-siloxane having from 2 to 4 silicon-bonded organic groups containing terminal olefinic unsaturation, the reaction being carried out in the presence of a polar organic liquid, for example dimethylformamide or butan-2-one, which is at least a partial solvent for the platinous halide. The acomplexes are useful as catalysts for hydrosilylation reactions.

Platinum complexes and use thereof

The specification discloses an organopolysiloxane-polyoxyalkylene emulsifier for polar in nonpolar liquid emulsions wherein organopolysiloxane-polyoxyalkylene polymer molecules are intentionally cross linked through a cross linking agent joined thereto by nonhydrolyzable bonds and being free of internal hydrolyzable bonds.

Cross-linked organopolysiloxanes and emulsions based thereon

The present invention is a process specific for the preparation of bis- and tris- amines by the contact of silylorganoamines in the presence of palladium monoxide catalyst. The process results in near quantitative conversion of the silylorganoamines to the desired bis- and tris-amines, without the need for elevated pressures and without formation of salts of ammonia and chloride.

Process for preparation of bis- and tris(silylorgano)amines

A quality assurance test method utilizing a fluorescent compound formed by reacting at least one aminofunctional organosilicon compound with at least one optical brightener having the formula ##STR1## and wherein R denotes anilino, sulfanilic, acid, metanilic acid, or anilin-2,5-disulfonic acid, and R' is methoxy, methylamino, N-methyl-N-hydroxyethylamino, bis(hydroxyethyl)amino, morpholino, anilino, or diethylamino. The organosilicon fluorescent compound is coated on the substrate and the substrate is placed under an ultraviolet light to check the extensiveness of the coating.

Quality assurance test utilizing an amino functional organosilicon

A fluorescent 'film prepared by reacting a polyfunctional acrylate with a fluorescent' compound formed by reacting at least one aminofunctional organosilicon compound with at lesat one optical brightener having the formula ##STR1## and wherein R denotes anilino, sulfanilic acid, metanilic acid, or anilin-2,5-disulfonic acid, and R' is methoxy, methylamino, N-methyl-N-hydroxyethylamino, bis(hydroxyethyl)amino, morpholino, anilino, or diethylamino.

Aminofunctional organosilicon optical brighteners

A method of treating textiles in order to increase the water absorptivity of the textiles involving contacting the textiles with an effective amount of a dioxolane functional organosilicon compound. Representative of the dioxolane or ketal functional organosilicon compounds employed are sym(2,2-dimethyl-4-methyloylpropyl-1,3-dioxolane) disiloxane and sym(2,2-dimethyl-4-methyl-oylpropyl-1,3-dioxolane) polydimethylsiloxane.

Growing community of inventors

Midland, MI, United States of America

Peter Y Lo