Abstract: A method for preparing a polyorganosiloxane, wherein the method includes a step of subjecting at least one organic silicon compound having at least one —OX group bonding to a silicon atom in the molecule, wherein X is a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or an alkoxyalkyl group having 2 to 10 carbon atoms, to a condensation reaction in the presence of a catalyst, wherein the catalyst is one obtained by surface treating at least one selected from the group consisting of hydroxides of elements in Group II of the periodic table, hydrates of hydroxides of elements in Group II of the periodic table and oxides of elements in Group II of the periodic table with a silane coupling agent.

Abstract: A heterogeneous catalyst comprising a metal-containing polymer matrix covalently bonded to a support material and a method of making and using such catalysts. The metal-containing polymer matrix comprises metal nano-particles encapsulated in a polymer matrix, e.g., a siloxane. In one aspect, the metal-containing polymer matrix can be bonded to the support material via a hydrophobic group attached to the support material. The catalyst can be recovered after being used in a metal catalyzed reaction and exhibit excellent catalytic activity upon reuse in subsequent reactions.

Abstract: The invention relates generally to transition metal salts, more specifically to iron, nickel, cobalt, manganese and ruthenium salts, activated with silylhydrides, and their use as efficient hydrosilylation catalysts.

Abstract: Embodiments of the invention are directed to the preparation of a discrete cyclosiloxane or a discrete mixture of cyclosiloxanes where a dihydroxysilane or dihydroxysiloxane condenses with a dihydrosilane or dihydroxysiloxane in the presence of a Lewis acid catalyst in a reaction phase including a solvent. The introduction of the dihydroxysilane or dihydroxysiloxane and dihydrosilane or dihydroxysiloxane is controlled such that the cyclocondensation occurs in a reaction phase that is dilute in the SiH and SiOH functionality permitting the isolation of the monocyclocondensation adduct in high yield with little higher molecular weight condensation products. In one embodiment of the invention 1,1-diphenyl-3,3,5,5-tetramethylcyclotrisiloxane is prepared in very high yield.

Abstract: The present invention describes a solventless ligand exchange using a siloxane polymer having a binding ligand that displaces the binding ligand on a quantum dot material.

Abstract: The invention relates to a method for continuously producing silanes and/or organopolysiloxanes by hydrosilylation, in which at least one compound (A) containing at least one carbon-carbon multiple bond is reacted with at least one compound (B) comprising at least one Si—H functionality, wherein the reaction is carried out in a reaction mixing pump.

Abstract: When an organoxysilyl or siloxy-containing ethylnorbornene compound is prepared by hydrosilylation of 5-vinyl-2-norbornene with a hydrogen organoxysilane or siloxy compound in the presence of a platinum catalyst, hydrosilylation is conducted in the co-presence of an ammonium salt. The organoxysilyl or siloxy-containing ethylnorbornene compound is effectively prepared at high reactivity and selectivity.

Abstract: Silsesquisiloxanes are produced in high yield and purity in a minimal number of process steps by reacting quaternary ammonium silicates with disiloxanes in a precipitant liquid which causes the silsesquisiloxane product to be precipitated in high purity.

Abstract: [Subject] The object of the present invention is to provide a method for producing siloxane oligomers which contain a small amount of ring form and have a high molecular weight. [Solving Means] An embodiment of the present invention is a method for producing siloxane oligomers which includes using a 2-hydroxycarboxylic acid compound represented by a predetermined formula as a catalyst and subjecting an alkoxysilane to hydrolysis and condensation. According to the production method of the present invention, it is possible to synthesize siloxane oligomers with a low content of siloxanes having cyclic structures and a high molecular weight.

Abstract: Amino group-containing organosilicon compounds containing no or only a small fraction of Si-bonded hydroxyl groups are prepared by preparing an organosilicon compound containing amino groups and Si-bonded hydroxyl groups by equilibration in the presence of an equilibration catalyst, and reacting the resultant product with a cyclic silazane. The products are particularly useful as a monomer or macromere for the preparation of high molecular weight organic polymers containing organosilicon blocks.

Abstract: In one aspect, the invention relates to hydrolysis-resistant silicone compounds. In particular, disclosed are sterically hindered hydrolysis-resistant silicone compounds and improved purity hydrolysis-resistant silicone compounds. Also disclosed are processes for making hydrolysis-resistant silicone compounds; the products of the disclosed processes; compositions and polymers comprising the disclosed compounds and products of the disclosed processes; and ophthalmic lenses, for example contact lenses, intraocular lenses, artificial cornea, and spectacle lenses, comprising the disclosed compositions, disclosed polymers, disclosed compounds, and products of the disclosed processes. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

Abstract: The invention relates to a method for preparing silica modified by a silane coupling agent. The method comprises the following steps: preparing a kind of coupling agent sol solution by mixing the solvent, water, catalyst and coupling agent; uniformly dispersing silica into the sol solution by means of ultrasonic dispersion or shear dispersion to achieve a turbid solution with uniform dispersion and ideal particle size; and then stirring the turbid solution at a constant speed to make the coupling agent sol reacting with silica to prepare highly hydrophobic silica modified by the coupling agent through controlling the temperature and reaction time. The coupling agent sol solution is obtained by a sol-gel process and silica is uniformly dispersed in the coupling agent sol solution through combined action of various dynamic means to ensure the sufficient reaction between silica and coupling agent, thus to obtain silica modified by the coupling agent.

Abstract: A process for preparing an alkylamino-alkylalkoxysilane of formula (I) R—(NR?)—Y—Si(R1)n(OR2)3-n (I) in which R is a linear, branched or cyclic alkyl group having 1 to 12 carbon atoms, R? is a hydrogen (H) or is a linear, branched or cyclic alkyl group having 1 to 12 carbon atoms, Y is a bivalent alkyl group from the group of —CH2—, —(CH2)2—, —(CH2)3—, —(CH2)(CH(CH3))(CH2)— and —(CH2)4—, R1 and R2 groups are the same or different and are each a linear or branched alkyl group having 1 to 4 carbon atoms, and n is 0 or 1 or 2, by reacting an alkylamine, used in excess, distilling off excess free alkylamine, treating the remaining product mixture with the alkylaminoalkylalkoxysilane and working up.

Abstract: When an organoxysilyl or siloxy-containing ethylnorbornene compound is prepared by hydrosilylation of 5-vinyl-2-norbornene with a hydrogen organoxysilane or siloxy compound in the presence of a platinum catalyst, hydrosilylation is conducted in the co-presence of an ammonium salt. The organoxysilyl or siloxy-containing ethylnorbornene compound is effectively prepared at high reactivity and selectivity.

Abstract: A method of processing polymer materials, highly filled or otherwise to recover cyclic structures or monomers. The method involves providing a vessel having a heated side wall, an agitator, and at least one of an additional heated structure, other than the heated side wall, within the vessel and means for forming a thin coat of material processed in the vessel on said heated side wall. A polymer material is fed into the vessel and heated to a sufficient temperature to cause depolymerization of the polymer material into cyclic structures or monomers. The cyclic structures or monomers are removed from the vessel and collected. The method does not require the use of a solvent.

Abstract: The present invention provides a process for applying a coating on a heat exchanger or a temperature controlled adsorber surface. This coating comprises a zeolite, an organic solvent, an organic siloxane resin that constitutes a binder and a plasticizing agent.

Abstract: A process for preparing organopolysiloxanes by reacting linear siloxane compounds (II) and/or cyclic siloxane compounds (III) with a compound having at least one hydroxyl group R?—OH (IV) where R? are identical or different organic radicals, which is characterized in that the compounds of the formulae (II), (III) and (IV) are used in such amounts that the molar ratio of silicon atoms in the compounds of the formulae (II) and (III) to OH groups in the compounds of the formula (IV) is from 0.01:1 to 1000:1, and in that the reaction is performed at a temperature of greater than 70° C. to 175° C., and in that the resulting reaction mixture is not treated with an acidic compound.

Abstract: Polymerizable siloxy-substituted silanes are obtained in high yield and purity by adding a substituted alkoxysilane to a mixture of disiloxane, acetic acid, sulfuric acid, and optionally an acidic catalyst, separating a product phase from an acidic phase, adding hexamethyldisilazane to the product phase and filtering off a resulting salt, followed by distillation.

Abstract: A method for manufacturing a packing material includes a first step of reacting an inorganic particle having a hydroxyl group with a silane coupling agent including a silane coupling agent having an alkenyl group with a carbon number of 2 or more and 8 or less and/or an alkynyl group with a carbon number of 2 or more and 7 or less and a second step of reacting the inorganic particle having reacted with the silane coupling agent, with a compound represented by a general formula of: (in the formula, R1 is an alkyl group with a carbon number of 4 or more and 50 or less or an aryl group with a carbon number of 6 or more and 30 or less and each of R2 and R3 is independently a hydrogen atom, a chloro group, or an alkyl group with a carbon number of 1 or more and 4 or less.).

Abstract: Amino group-containing organosilicon compounds containing no or only a small fraction of Si-bonded hydroxyl groups are prepared by preparing an organosilicon compound containing amino groups and Si-bonded hydroxyl groups by equilibration in the presence of an equilibration catalyst, and reacting the resultant product with a cyclic silazane. The products are particularly useful as a monomer or macromere for the preparation of high molecular weight organic polymers containing organosilicon blocks.

Abstract: In accordance with one aspect, the present invention provides an amino-siloxane composition comprising at least one of structures I, II, III, IV or V said compositions being useful for the capture of carbon dioxide from gas streams such as power plant flue gases. In addition, the present invention provides methods of preparing the amino-siloxane compositions are provided. Also provided are methods for reducing the amount of carbon dioxide in a process stream employing the amino-siloxane compositions of the invention as species which react with carbon dioxide to form an adduct with carbon dioxide. The reaction of the amino-siloxane compositions provided by the present invention with carbon dioxide is reversible and thus, the method provides for multicycle use of said compositions.

Abstract: Dimethicone copolyol polymers are synthesized from dimethicone copolyol macromers. Polymers containing the macromer repeating units are useful in a variety of applications including personal care, textile and industrial formulations to deliver softness, lubricity, fixative, humidity resistance, water repellency, gloss, surface modification, and surfactant properties.

Abstract: A process for preparing a cationically photopolymerizable siloxane oligomer, that includes: combining a platinum group catalyst, a hydrosiloxane compound selected from and a vinyl or allyl compound comprising a cationically photopolymerizable functionality; and then contacting the product with oxygen in the presence of the catalyst to form the cationically photopolymerizable multifunctional siloxane oligomer. R1 and R3 are independently fluoroethyl, methyl or phenyl.

Abstract: A material for insulating film suitable as an interlayer insulating material for a semiconductor device, from which an insulating film is formed by chemical vapor deposition, and an insulating film formed from such a material and a semiconductor device employing an insulating film, are provided.

Abstract: An asymmetric siloxane is made by reacting a silicone having the formula MHDxM?H where MH is R1R2HSiO1/2, M?H is R4R5HSiO1/2 and x is an integer 0?x?10 under selective hydrosilylation conditions in the presence of a precious metal hydrosilylation catalyst, with a first olefinic compound and in a second step, a monohydridosiloxane produced in the first step is reacted under hydrosilylating conditions with another olefinic compound different from the first olefinic compound.

Abstract: A cosmetic, wherein the cosmetic comprises tetraquistrimethylsiloxysilane represented by the formula (1) [(CH3)3SiO]4Si??(1). The cosmetic has an excellent sensory properties and stability.

Abstract: A method for producing an isocyanate group-containing siloxane compound is provided. In this method, a halogenated siloxane compound represented by the following general formula (1): or the following general formula (2) wherein R1, R2, R3, and R4 are independently hydrogen atom, a monovalent hydrocarbon group containing 1 to 8 carbon atoms, or a siloxy group represented by OSiR5R6R7 wherein R8, R6, and R7 are a monovalent hydrocarbon group containing 1 to 8 carbon atoms, X is a halogen atom, n is an integer of 1 to 10, a is 0, 1, or 2, and b is an integer of 2 to 9; is reacted with a cyanate salt represented by the following general formula (3): Mm+(OCN)m??(3) wherein M represents an alkali metal or an alkaline earth metal, and m is 1 or 2. The isocyanate group-containing siloxane compound produced is represented by the following general formula (4): or the following general formula (5): wherein R1, R2, R3, R4, n, q, and a are as defined above.

Abstract: A highly volatile electrical/electronic parts surfactant containing a polyether-modified silicone having one polyether chain in the molecule, wherein the surface tension at 25° C. of a 0.01 mass % aqueous solution thereof is 25 mN/m or less, the aforesaid silicone is expressed by the following average structural formula (1), and when heated from room temperature to 200° C. at a rate of 5° C./minute to 200° C. and maintained at a temperature of 200° C. for 100 minutes, the polyether-modified silicone completely volatilizes without leaving any remainder, and a method of manufacturing this highly volatile polyether-modified silicone are disclosed. AMe2SiO(MeASiO)nSiMe2A??(1) In formula (1), any one of A is a substituent group expressed by the following general formula (2), the remaining A are methyl groups and n is an integer from 0-2. —CaH2aO(C2H4O)bR??(2) In formula (2), a is 3-4, b is an integer from 1-7 and R is a methyl group or an ethyl group.

Abstract: Disiloxane compounds of the formula MM? Where M comprises either branched allyl hydrocarbon substituents or silanyl substituents and M? comprises an alkylpolyalkyleneoxide substituent. The disiloxane compounds of the invention exhibit an enhanced resistance to hydrolysis outside a pH range ranging from 6 to 7.5, and are useful as surfactants.

Abstract: Disclosed are a siloxane compound, a photoresist composition using the same, and a method of forming a pattern, wherein the siloxane compound is having a general formula: wherein R1 is a tertiary butyl group or a 1-(tert-butoxy)ethyl group, and R2 and R3 is each independently a lower alkyl group having 1 to 4 carbon atoms.

Abstract: Coating compositions repairable by introduction of energy and comprising defined siloxanes, coatings obtained therewith and repairable by introduction of energy, methods of producing them, and their use.

Abstract: Cosmetic formulations comprising alkyl-substituted siloxanes as vaporizable carriers.

Abstract: Process for the preparation of a functionalized silicone oil by hydrosilylation of synthons in the presence of at least one organohydrosilicon compound, characterized in that: (1) the synthons hydrosilylated with the organohydrosilicon compound are identical or different, and comprise at least one hydrocarbon-comprising ring in which is included at least one oxygen atom, (2) the said hydrosilylation reaction is carried out in the presence of a homogeneous catalytic system comprising (i) a metal, preferably a complexed metal, chosen from the group consisting of cobalt, rhodium, ruthenium, platinum and nickel and (ii) a heterocyclic organic compound chosen from lactones, lactams, cyclic carbonates and cyclic carbamates.

Abstract: A photocurable composition, including (a) a photocurable monomer, e.g. a cationically curable monomer and/or a radically curable monomer; (b) reactive particles comprising a crosslinked elastomeric core, e.g. made of polysiloxane material, and a shell of reactive groups on an outer surface of the core, wherein the reactive groups comprise epoxy groups, ethylenically unsaturated groups, or hydroxy groups; and (c) an appropriate photoinitiator, e.g. a radical photoinitiator; and a cationic photoinitiator. A method of making a 3-D object from such a composition and a 3-D object made by the method are also provided. The cured composition generally has a smooth surface. The use of the reactive particles makes the composition more stable and the particles do not readily separate out.

Abstract: The present invention provides a novel method for the preparation of diorganosilanes by disproportionation of a hydridosiloxanes comprising at least one terminal SiH group and at least one siloxane bond in the presence of Lewis acid catalysts. The reaction is both selective and occurs under mild conditions. The triaryl borane, tris(petafluorophenyl)borane, is especially suited for use as a catalyst in the reaction. Organic catalysts such as tris(pentafluorophenyl)borane are typically preferred owing to their greater solubility and stability in the reaction mixture, relative to inorganic Lewis acid catalysts. The product, diorganosilane may be isolated from the product mixture by conventional techniques such as distillation.

Abstract: Mesostructured and microporous to mesoporous organofunctionalized silica compositions are described. The compositions incorporate the organofunctional group L as part of a LSiO3 unit in the framework of the compositions. In addition the compositions incorporate the organofunctional group R as part of a O3Si—R—siO3 unit in the framework of the compositions. The compositions are useful as molecular sieves, supports for catalysts and numerous other applications requiring an organo group on surfaces of a silica.

Abstract: By reacting two types of organosiloxane compounds in the presence of an alkaline compound and under conditions that do not substantially promote equilibration reaction, a linear organosiloxane polymer having a single peak molecular weight distribution is simply and economically produced with minimized formation of cyclics.

Abstract: Functionalized silsesquioxanes containing from 6 to 24 silicon atoms and minimally about 67 mol percent RSiO3/2 moieties where R is a phenyl group bearing a chemically reactive functional group are highly suitable for use as nanoparticles in producing highly ordered nanocomposites of many types, containing a high proportion of interphase. The nanocomposites have unusual physicochemical properties due to the use of uniform, highly functionalized nanoparticles.

Abstract: Efficient processes have been developed for the cost effective functionalization of polyhedral oligomeric silsesquioxane-silanols (POSS-Silanols) and for the manufacture of polyfunctional polyhedral oligomeric silsesquioxanes. The processes utilize the action of bases or acids on silane coupling agents. The preferred process utilizes base to promote the silylation of POSS-Silanols of the formula [(RSiO1.5)n(R(HO)SiO1.0)m]?# with silane coupling agents to form POSS species with functionalized incompletely condensed nanostructures [(RSiO1.5)n(R(YSiR2O)SiO1.0)m]?# or functionalized completely condensed nanostructures [(RSiO1.5)n(YSiO1.5)1]?#. The process can alternately be conducted with acids. A second process utilizes base to alkylate POSS-Silanols with functionalized alkyl halides. A third related process utilizes base to react with silane coupling agents to form polyfunctional, fully condensed POSS species of formula [(YSiO1.5)n]?#. This process can also alternately be conducted under acidic conditions.

Abstract: A branched tetrasiloxane is prepared by preforming a liquid mixture of a disiloxane compound, an alcohol and an acid catalyst, adding a trialkoxysilane compound to the mixture for reaction, and adding water to the reaction mixture for co-hydrolysis, thereby forming a branched tetrasiloxane. The method is capable of preparing a branched tetrasiloxane, especially methyltris(trimethylsiloxy)silane having a sufficiently high purity to use as cosmetic oil in good yields.

Abstract: Provided are polyorganosilsesquioxane and process for preparing the same. The polyorganosilsesquioxane is obtained by various methods including polymerization of 1,3-diorganosiloxane, a precursor that is prepared by using silane compounds as starting materials. The polyorganosilsesquioxane has convenience in handling and controlling the rate of polymerization, and structure of highly regular form, and be imparted high functionality and various characteristics as compared to a conventional polyorganosilsesquioxane.

Abstract: Mesostructured and microporous to mesoporous organofunctionalized silica compositions are described. The compositions incorporate the organofunctional group L as part of a LSiO3 unit in the framework of the compositions. In addition the compositions incorporate the organofunctional group R as part of a O3Si—R—siO3 unit in the framework of the compositions. The compositions are useful as molecular sieves, supports for catalysts and numerous other applications requiring an organo group on surfaces of a silica.

Abstract: A photocurable composition, including (a) a cationically curable monomer; (b) a radically curable monomer; (c) reactive particles comprising a crosslinked polysiloxane core and a shell of reactive groups on an outer surface of the core, wherein the reactive groups comprise epoxy groups, ethylenically unsaturated groups, or hydroxy groups; (d) a radical photoinitiator; and (e) a cationic photoinitiator. A method of making a 3-D object from such a composition. A 3-D object made by the method.

Abstract: The present invention relates to immediately acting pest control compositions based on cyclic polysiloxanes, which can be employed without a residue and without a lasting action.

Abstract: A branched organopolysiloxane is prepared by polymerizing an organopolysiloxane mixture of a branch unit-containing organopolysiloxane and a low molecular weight organopolysiloxane in the presence of an acidic or basic catalyst, or by adding a surfactant to the organopolysiloxane mixture, dispersing it in water to form an emulsion, and polymerizing the emulsion.

Abstract: A process for forming an olefin epoxidation catalyst is described. The process comprises reacting a tert-alkyl trihydroxysilane with a titanium complex such that the ratio of Si:Ti is 7. The catalyst is very active and selective in olefin epoxidation.

Abstract: The present invention relates to multifunctionalized polyorganosiloxanes comprising, per molecule at least one functional siloxy unit Y having C1-C5 alkoxy radical and at least one other functional siloxy unit W having an halogenated or polyhalogenated alkyl, aralkyl or aryl; polyether ether; epoxidized alkyl; alkoxyalkyl; hydroxylated, carbonylated or esterified alkyl; phenol; and alkoxysilyl; and optionally at least one siloxy unit having a SiH group. The alkoxy functionality Y is introduced onto a suitable polyhydroorganosiloxane by a dehydrogenation/condensation reaction from the alcohol from which Y derives and then the non-hydrogen functionality W by a hydrosilylation reaction from the olefinic compound from which W derives. The multifunctionalized polyorganosiloxanes can be used as antiadhesion modulators in silicone compositions.

Abstract: A cyclic organosilicon compound comprising one aliphatic unsaturation described by formula where each R is an independently selected hydrocarbon radical free from aliphatic unsaturation comprising 1 to about 18 carbon atoms; each X is independently selected from the group consisting of halogen, alkoxy, acyloxy, and ketoximo; m is an integer from 2 to 7; p is an integer from 0 to 6; m+p is an integer from 2 to 8; n is 0, 1, or 2; each Z is independently selected from the group consisting of divalent hydrocarbon radicals free of aliphatic unsaturation comprising about 2 to 18 carbon atoms and a combination of divalent hydrocarbon radicals and siloxane segments; and Y is selected from the group consisting of hydrocarbon radicals comprising one aliphatic unsaturation and 2 to about 18 carbon atoms and a combination comprising one aliphatic unsaturation of hydrocarbon radicals, siloxane segments, and a divalent hydrocarbon radical free of aliphatic unsaturation comprising 2 to about 18 carbo

Abstract: This invention relates to silicone compounds in which terminal SiO of cage-type and/or ladder-type polyphenylsilsesquioxanes is wholly or partly linked to a triorganosilyl group containing reactive functional group X and also relates to a process for preparing said silicone compounds by subjecting cage-terminated and silanol-free cage-type and/or ladder-type polyphenylsilsesquioxanes to an equilibrium reaction under heat with disiloxanes containing reactive functional group X of the following structural formula in an organic solvent in the presence of an alkaline rearrangement and condensation catalyst. This invention provides silicone compounds containing terminal reactive functional groups of excellent storage stability and properties of good reproducibility such as heat resistance.

Abstract: A method for producing a saturated siloxane polymer is provided. In one aspect, the method comprises hydrogenating an aromatic siloxane monomer by contacting it with hydrogen in a temperature of 100° C. to 200° C. and a hydrogen pressure of 1000 to 2000 psi for 1 to 6 hours in the presence of a hydrogenation catalyst to produce a hydrogenated siloxane monomer, and anionically polymerizing the hydrogenated siloxane monomer.