Abstract: This invention pertains to ceramic matrix composites that comprise the coated ceramic fibers wherein the coating comprises at least one binary coating of boron nitride (BN) and silicon nitride (Si3N4) within ceramic matrices derived from curable preceramic polymers. The composites can be formed into complex shapes which have good oxidation resistance at high temperature, good resistance to moisture high flexural strength and are resistant to moisture.

Abstract: A method for making oil free polysiloxane standard, fine and microemulsions using emulsion polymerization is disclosed. The method comprises reacting a cyclicsiloxane in the presence of a catalyst, ionic surfactant and nonionic surfactant within a certain operating window. Emulsions containing silicone copolymers can also be produced using the method of the instant invention.

Abstract: Nanoporous silicone resins and silicone resin films having low dielectric constants and a method for preparing such nanoporous silicone resins.

Abstract: A lithium ion battery electrode formed by the pyrolysis of a silane polymer followed by introducing lithium ions. These electrodes can be used to form batteries with large capacities, low irreversible capacity, high density and good safety behavior.

Abstract: This invention relates to a macromonomer and a method for its preparation. The macromonomer has one or more silicon-bonded hydrogen atoms at one molecular chain terminal, and one or more aliphatically unsaturated silicon-bonded organic groups at the other molecular chain terminal. This invention further relates to a method of forming a hyperbranched polymer by polymerizing the macromonomer with a group VIII metal catalyst. The hyperbranched polymers can be used as surfactants, gelling agents, drug delivery systems, and polymeric absorbents.

Abstract: The invention pertains to a polydiorganosiloxane dispersibility improver for fluororesin powders that contains in the pendant position (A) an organic group selected from the set consisting of polyoxyalkylene-functional organic groups, alkyl groups having at least 12 carbon atoms, and polydialkylsiloxane chain-containing organic groups, and contains in the pendant position or the molecular chain terminal position, (B) a perfluoroalkyl-functional organic group with the general formula F(CF2)a—R1— in which R1 is alkylene or alkyleneoxyalkylene and a is an integer with a value of at least 3. The polydiorganosiloxane dispersibility improver for fluororesin powders has the ability to induce the uniform dispersion of fluororesin powders in organic resins. As a consequence the organic resin compositions have the ability to form uniform and transparent coatings that have an excellent surface lubricity.

Abstract: A hydrosilylation reaction method that achieves high catalytic activity and stability, and improves the positional selectivity of the hydrosilylation reaction product. The method comprises reacting an unsaturated compound selected from the group consisting of aromatic vinyl compounds and allyl halides with a silicon compound having hydrosilyl groups described by formula HSiRn(Z)3−n, where n=0, 1, or 2, R is a hydrocarbon group and Z is selected from the group consisting of a silamino group, siloxy group, and siloxanoxy group in the presence of a carboxylic acid compound, a silyl ester of a sulfonic acid, and a platinum catalyst.

Abstract: A method for changing the dielectric properties of a polymer impregnated and pyrolyzed ceramic matrix composite (polymer impregnated and pyrolyzed ceramic matrix composite) is disclosed. The polymer impregnated and pyrolyzed ceramic matrix composite can be used in aircraft and turbine engines. polymer impregnated and pyrolyzed ceramic matrix composite comprises a ceramic matrix, a reinforcing fiber, and at least 1 additive used to change dielectric properties (dielectric constant and loss factor). The additive can be a low dielectric constant material having a dielectric constant in the range of 1 to 7.5. The low dielectric constant material can be an oxide such as silica or aluminosilicate or a non-oxide such as silicon nitride, boron nitride, or silicon carbide. The low dielectric constant material can be incorporated in the ceramic matrix as a filler.

Abstract: A method for hydrolyzing chlorosilanes having at least three chlorine atoms bonded to each silicon atom to form silicone resins. The method comprises adding at least one of hydridotrichlorosilane, tetrachlorosilane, or organotrichlorosilane to a two-phase mixture comprising a non-polar organic solvent, an aqueous phase comprising 0 to about 43 weight percent hydrochloric acid, and a surface active compound selected from the group consisting of alkylsulphonic acid hydrate, alkali metal salt of alkylsulphonic acid, arysulphonic acid hydrate, and alkali metal salt of arylsulphonic acid.

Abstract: Disclosed is a method for making an air bridge in an electronic device. This method uses amorphous silicon carbide to protect electrical conductors in the device during formation of the bridge. The silicon carbide also provides hermetic and physical protection to the device after formation.

Abstract: A method for selective electroless metal deposition on a substrate. The method comprises applying a patterned coating comprising a silyl hydride functional resin onto a substrate. An electroless plating solution comprising a metal ion is then applied onto the silyl hydride functional resin coating to deposit a patterned metal film on the substrate. The process of the invention is especially useful in the electronics industry.

Abstract: A method for producing a sized, coated ceramic fiber decreases mechanical damage to the fiber during weaving, and the sizing can be removed after weaving by heating at a low temperature.

Abstract: This invention pertains to a dispersibility improver for fluororesin powders that has the ability to induce the uniform dispersion of fluororesin powders in organic resins; a modifier for application to organic resins wherein said modifier comprises fluororesin powder and the aforesaid dispersibility improver; and finally organic resin compositions that contain the aforesaid modifier and as a consequence have the ability to form uniform and transparent coatings having an excellent surface smoothness.

Abstract: This invention pertains to a method for forming thin films on substrates wherein the films are produced by applying a solution of an electrically insulating, heat-curing resin onto the substrate, evaporating the solvent and exposing the resin to high energy radiation to cure the resin. The resin solution contains a substance selected from solvents and gas generating additives that causes the dedensification of the film during the cure of the resin. This results in a film having a dielectric constant of below 2.7. This invention also pertains to a semiconductor device having an interconnect structure comprising at least one electrically conductive layer with an interposed insulating layer having a dielectric constant of less than 2.7 wherein the insulating layer is produced by the method of this invention.

Abstract: This invention pertains to a method for producing hydrogenated silicon oxycarbide (H:SiOC) films having low dielectric constant. The method comprises reacting an methyl-containing silane in a controlled oxygen environment using plasma enhanced or ozone assisted chemical vapor deposition to produce the films. The resulting films are useful in the formation of semiconductor devices and have a dielectric constant of 3.6 or less.

Abstract: To provide a composition and process for forming insulating films that can produce insulating films having low dielectric constants. The composition comprises (A) an electrically insulating curable inorganic or organic resin, (B) a solvent, and (C) at least one solvent-soluble substance (excluding the solvent used for component (B)) that upon heating or by interaction with the resin (A) can generate gas or undergo volatilization in the temperature range from 0.degree. C. to 800.degree. C. The insulating films are prepared by coating the surface of a substrate the composition; evaporating the solvent; and subsequently heating the substrate in order to generate gas from component (C) during the course of or after the cure of the said resin (A).

Abstract: A method for preparing high density titanium diboride ceramic bodies in which titanium diboride powder is first mixed with a preceramic organosilicon polymer. The mixture is then molded and sintered under pressure or by a pressureless process.

Abstract: The instant invention pertains to a multi-layer tamper proof electronic coating wherein the first layer is a protecting layer produced from a preceramic silicon containing material and at least one filler. The second layer is a resin sealer coat produced from a sealer resin selected from the group consisting of colloidal inorganic-based siloxane resins, benzocyclobutene based resins, polyimide polymers, siloxane polyimides and parylenes. An optional third layer is a cap coating layer selected from SiO.sub.2 coating, SiO.sub.2 /ceramic oxide coating, silicon containing coatings, silicon carbon containing coatings, silicon nitrogen containing coatings, silicon oxygen nitrogen coatings, silicon nitrogen carbon containing coatings and/or diamond like coatings.

Abstract: 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.

Abstract: The present invention provides a curable composition which comprises (A) a base-generating substance which generates a base when exposed to the action of ultraviolet light, (B) a siloxane polymer which has silicon-hydrogen bonds (Si--H) capable of reacting with hydroxy groups under the effect of the base to form silicon-oxygen bonds (Si--O) and hydrogen molecules (H.sub.2), and (C) an acid substance. This composition is cured by irradiation with ultraviolet light. During this ultraviolet irradiation, a mask is placed between a coating film of the composition and the radiation source, and the uncured portions of the composition are dissolved and removed so that a pattern is formed. The residual portions are then heated to produce a pattern-cured product.