Dow Corning Corporation

Dce Aprilis, Inc.

Duane R Bujalski

Kai Su

Gregg A Zank

Thomas Duncan Barnard

Jonathan Lipowitz

Thomas F Lim

Ronald Paul Boisvert

Gary E LeGrow

Ronald H Baney

James A Rabe

William H Atwell

Zhongtao Li

Gregg Alan Zank

Eric Jude Joffre

Eric S Kolb

Peter Y Lo

Russell Keith King

Brian Harkness

Bianxiao Zhong

Jon Vierling Degroot, Jr

Shedric Oneal Glover

Katsuya Eguchi

Gary E Le Grow

John Albaugh

Duan Li Ou

Pierre Maurice Chevalier

David J Deshazer

Karen L Hueston

John Ladouce

Gary E DeGrow

The present invention provides a silicone composition that includes an epoxy-functional organopolysiloxane resin and an epoxy-functional organosiloxane oligomer, and a method of preparing optical waveguides using the silicon composition. The present invention also provides a cured silicon composition, and an optical waveguide that includes the cured silicon composition.

Epoxy-functional radiation-curable composition containing an epoxy-functional siloxane oligomer for enhanced film retention and adhesion during solvent development

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

A silicone resin containing boron, aluminum, and/or titanium, and having silicon-bonded branched alkoxy groups; a silicone composition containing a silicone resin; and a method of preparing a coated substrate comprising applying a silicone composition on a substrate to form a film and pyrolyzing the silicone resin of the film.

Silicone resin and silicone composition

This invention pertains to a siloxane resin composition comprising RSiOsiloxane units, RSiOsiloxane units and (RO)SiOsiloxane units wherein Ris an alkyl group having 1 to 5 carbons, hydrogen, or mixtures thereof; Ris a monovalent organic group having 6 to 30 carbons; Ris a branched alkyl group having 3 to 30 carbons, b is from 1 to 3; and the siloxane resin contains from 2.5 to 85 mole percent RSiOunits, 2.5 to 50 mole percent RSiOunits and 5 to 95 mole percent (RO)SiOunits. The siloxane resin is useful to make insoluble porous resin and insoluble porous coatings. Heating a substrate coated with the siloxane resin at a sufficient temperature effects removal of the Rand RO groups to form an insoluble insoluble porous coating having a porosity of 1 to 60 volume percent and a dielectric constant in the range of 1.5 to 3.0.

Siloxane resins

Herein is disclosed a resin solution, comprising (a) about 0.1 solids wt % to about 50 solids wt % of an organosiloxane resin comprising the formula (RSiO ) (R&prime;SiO ) , wherein R is selected from the group consisting of C -C alkyl, C -C alkenyl, C -C alkoxy, C -C alkenoxy, and C -C substituted hydrocarbon; R&prime; is selected from the group consisting of &mdash;H, C -C unsubstituted hydrocarbon, and C -C substituted hydrocarbon; x is from about 5 mole % to about 75 mole %; y is from about 10 mole % to about 95 mole %; and x&plus;y is at least about 40 mole %; and (b) about 50 solids wt % to about 99.9 solids wt % of a resin comprising at least about 90 mole % of the formula HSiO . Also disclosed herein is a method of preparing such a resin solution, as well as a method of preparing a solid coating, comprising (i) coating the resin solution on a surface; (ii) removing the solvent from the resin solution; (iii) removing R groups from the organosiloxane resin; and (iv) curing the resin solution, to form the solid coating. Coatings prepared from the resins disclosed herein have relatively low dielectric constants and also have relatively low SiH content and relatively high modulus.

Hydrosilsesquioxane resin compositions having improved thin film properties

This invention pertains to a siloxane resin composition comprising R SiO siloxane units, R SiO siloxane units and (R O) SiO siloxane units wherein R is an alkyl group having 1 to 5 carbons, hydrogen, or mixtures thereof; R is a monovalent organic group having 6 to 30 carbons; R is a branched alkyl group having 3 to 30 carbons, b is from 1 to 3; and the siloxane resin contains from 2.5 to 85 mole percent R SiO units, 2.5 to 50 mole percent R SiO units and 5 to 95 mole percent (R O) SiO units. The siloxane resin is useful to make insoluble porous resin and insoluble porous coatings. Heating a substrate coated with the siloxane resin at a sufficient temperature effects removal of the R and R O groups to form an insoluble insoluble porous coating having a porosity of 1 to 60 volume percent and a dielectric constant in the range of 1.5 to 3.0.

The present invention relates to a method for the formation of amorphous boron silicon oxycarbide fibers and crystalline boron-doped silicon carbide fibers wherein the method comprises preparing a blend of a siloxane resin and a carborane-siloxane oligomer, forming the blend into green fibers, and then curing and pyrolyzing the fibers.

Method for producing ceramic fibers from blends of siloxane resins and

The present invention relates to a method for the formation of amorphous boron silicon oxycarbide fibers and crystalline boron-doped silicon carbide fibers comprising: preparing a blend of a siloxane resin and a boron-containing polymer, forming the blend into green fibers, and then curing and pyrolyzing the fibers.

Method for formation of crystalline boron-doped silicon carbide and

This invention relates to the preparation of thermally stable, substantially polycrystalline silicon carbide ceramic fibers using borosilazane resins. The method comprises spinning fibers from the resin, infusibilizing the spun fibers and pyrolyzing the spun fibers at a temperature greater than about 1700.degree. C.

Preparation of substantially crystalline silicon carbide fibers from

The present invention relates to a method for preparing a ceramic fiber from alkenyl or alkynyl functional resins and to the ceramic fibers produced therefrom. The method comprises (A) forming a fiber from a siloxane resin comprised of R.sup.1.sub.a R.sup.2.sub.b RSiO.sub.(3-a-b)/2 units wherein R is an unsaturated carbon group; each R.sup.1 is selected from the group consisting essentially of an aryl group having from 6 to 10 carbon atoms and functional derivatives thereof; each R.sup.2 is selected from the group consisting essentially of an alkyl group having from 1 to 4 carbon atoms and functional derivatives thereof; a has a value of 0, 1 or 2; b has a value of 0, 1, or 2 with the proviso that a+b &lt;2; (B) curing the fiber by exposing the fiber to high energy radiation to render it non-fusible; and (C) heating the non-fusible fiber in an inert environment to a temperature above about 800.degree. C. to convert it to a ceramic fiber.

Amorphous silicon oxycarbide and crystalline silicon carbide fibers from

The present invention relates to a method for preparing a ceramic fiber wherein the method comprises (A) forming a green fiber from an alk-1-enyl ether functional siloxane resin of the general formula (R.sup.1 SiO.sub.3/2).sub.q (R.sup.2 SiO.sub.3/2).sub.r (R.sup.1.sub.w R.sup.2.sub.x RSiO.sub.(3-w-x)/2).sub.s (R.sup.1.sub.w R.sup.2.sub.x R.sup.3 SiO.sub.(3-w-x)/2).sub.t wherein R is an alk-1-enyl ether group; each R.sup.1 is selected from an aryl group having from 6 to 10 carbon atoms; each R.sup.2 is selected from an alkyl group having from 1 to 4 carbon atoms; R.sup.3 is an alkenyl group having from 2 to 10 carbon atoms; w has a value of 0, 1 or 2; x has a value of 0, 1, or 2 with the provisio that w+x.ltoreq.2; q has a value of 0 to 0.98; r has a value of 0 to 0.98; s is greater than zero; t.gtoreq.0; s+t=0.02 to 0.5 and q+r+s+t=1; (B) curing the green fiber to render it non-fusible; and (C) heating the non-fusible fiber in an inert environment to a temperature above 800.degree. C. to convert it to a ceramic fiber.

Process of producing fibers from curable alk-1-enyl ether functional

A method of crosslinking a silazane polymer having Si--H bonds in which the polymer is mixed with a crosslinker selected from alkenyl functional cyclosiloxanes and alkenyl functional cyclosilazanes and a crosslinking promoter and then heated to a temperature sufficient to crosslink the silazane polymer. The mixture of the silazane polymer, crosslinker and promoter is useful in the formation of ceramic matrix composites.

Crosslinkers for silazane polymers

The present invention describes a novel method for crosslinking polysilazane polymers having Si--H or N--H bonds. The method comprises mixing the polysilazane with a silazane crosslinker having at least 2 boron functional groups which can react with the Si--H or N--H bonds of the polysilazane and then facilitating crosslinking.

Growing community of inventors

Bay City, MI, United States of America

Duane R Bujalski