Abstract: A method of purifying tetraethylorthosilicate (TEOS) to remove boron impurities therefrom, and a related method of analyzing TEOS to determine concentration of boron impurities therein.

Abstract: A method for the preparation of organyltriorganooxysilanes containing at least one silicon-carbon bond is provided comprising reacting at least one tetraorganooxysilane with an activated carbon and at least one base.

Abstract: Silicone-containing organic compounds useful as modulators of mammalian nuclear hormone receptors, particularly the retinoid receptors and the farnesoid receptors.

Abstract: An improvement on existing methods to desulfurize oligosulfide silanes generates no added raw materials or waste streams in addition to the sodium chloride which is generated as a byproduct in the current manufacturing process for polyusulfide silanes. This is accomplished by using mercaptosilane salts as desulfurizing agents, which yield more product in addition to that already obtained from the desulfurized silane of higher sulfur rank. The process simply entails reacting an oligosulfide silane with a mercaptosilane salt to thereby obtain an oligosulfide silane whose average sulfur rank is less than the starting oligosulfide silane. Coproduct sulfide salts can be recycled back to the oligosulfide manufacturing process. The mercaptosilane salts are novel materials as well.

Abstract: A method of preparing 3-[N-(2-aminoethyl)]aminoalkylalkoxysilanes in which ethylenediamine, ethylenediamine hydrochloride salt, and a suitable &ohgr;-chloroalkylalkoxysilane are fed to a reactor at a feed ratio of 3-40 moles total ethylenediamine per mole of chloroalkylalkoxysilane under reaction conditions to produce a such aminoalkylalkoxysilane. The proportions of ethylenediamine and ethylenediamine hydrochloride salt are controlled such that a phase containing the diamine salt is present in said reactor separate from a phase containing the aminoalkylalkoxysilane. Following said reaction, the salt phase is separated from the silane phase for recycle to the two phase reactor.

Abstract: A method of preparing an organosilicon compound containing an acryloxy-functional group or a methacryloxy-functional group represented by general formula CH2═CR1—COO—R2—Si(OR3)nR43−n, where R1, R2, R3, R4 are as described below, comprising reacting (a) an alkali-metal salt of acrylic acid or an alkali-metal salt of methacrylic acid described by general formula CH2═CR1COOM1, where R1 is a methyl group or a hydrogen atom and M1 is an alkali metal and (b) an organosilicon containing a halogen-substituted organic group described by general formula XR2Si(OR3)nR43−n, where X is a halogen atom, R2 is an alkylenoxyalkylene group or an alkylene group comprising 1 to 6 carbon atoms, R3 is an alkyl group comprising 1 to 6 carbon atoms or an alkoxyalkyl group comprising 2 to 4 carbon atoms, R4 is a monovalent hydrocarbon group, and n is an integer of 1 to 3; in the presence of (c) a tertiary amine having a cyclic structure selected from the group consisting of 1,8-diazabicyclo&lsqb

Abstract: An improved process for the production of organosilicon compounds of the formula (RO)3−mRmSi—Alk—Sn—Alk—SiRm(OR)3−m where R is independently a monovalent hydrocarbon of 1 to 12 carbon atoms, Alk is a divalent hydrocarbon of 1 to 18 carbon atoms; m is an integer of 0 to 2, n is a number from 1 to 8 is disclosed.

Abstract: A fluorine-containing organic silicon compound represented by the following formula (1):   (1) provided that the symbols in the formula (1) have the following meanings: R1 and R2: respectively independently monovalent hydrocarbon groups; Af: a group represented by the following formula (2), (3), (4) or (5): A1—X1—  (2) A2—X2—O—X1—  (3) A1—X2—O—X1—  (4) A2—X1—  (5) provided that the symbols in the formulae (2), (3), (4) and (5) have the following meanings: A1: a monovalent polyfluorohydrocarbon group; A2: a monovalent polyfluorohydrocarbon group containing an etheric oxygen atom; X1: —(CH2)a— (a is an integer of at least 3); X2: a bivalent hydrocarbon group.

Abstract: A process is disclosed for the synthesis of N-cycloalkylaminoalkylsilanes, wherein the process comprises hydrogenating the corresponding N-arylaminoalkylsilanes in the presence of a catalytically effective amount of a supported or unsupported catalyst selected from the group consisting of palladium, platinum, nickel, rhenium, rhodium, ruthenium, copper chromite, and mixtures of the foregoing.

Abstract: It is known to polymerize olefins using transition metal complexes and/or compounds. There is an ongoing search for catalysts for olefin polymerization which do not rely on transition metals as the active center. The present invention provides novel aluminum phosphinimine complexes, containing additional heteroatoms which are useful in the polymerization of olefins.

Abstract: Metal complex containing one or more silsesquioxane ligands, having the formula Zy(MAxBq)b  (I), wherein Z is a silsesquioxane according to the formula R7−lSi7O12YD1+l  (II), M is a metal from groups 3-6 of the Periodic System of the Elements and the lanthanides, A is a monoanionic ligand bound to the metal, B is a &pgr;-bound ligand, y represents the number of silsesquioxane ligands and is 1-10, b represents the number of metal groups and is 1-20, q is 0,1 or 2, x is the number of substituents A bound to the metal; the value of x depends on the metal used and is equal to the valency of the metal minus 1, 2, 3 or 4, R is a substituent bound to Si, Y is an atom from group 13 or 14 of the Periodic System of the Elements, D is a group, directly bound to Y or Si with one atom from group 15 or 16 of the Periodic System of the Elements and 1 determines the amount of substituents R and atoms D and is equal to 0, 1, 2 or 3.

Abstract: A method for producing 1,2-bis(indenyl)ethanes in good yield is described. An agent and its application for isomerizing kinetic EBI to thermodynamic EBI and for isomerizing meso TMS-EBI to rac TMS-EBI are exemplified.

Abstract: The invention concerns a method for preparing high purity polyorganosiloxanes with arylalkyl function(s) by: hydrosilylation of a hydrogenopolyorganosiloxane, reagent (SiH), and an aromatic monovinyl compound, reagent (Vi), with simultaneous introduction of reagent (SiH) and reagent (Vi), in a reaction medium containing an inert solvent and a hydrosilylation catalyst; then elimination of the solvent, the possible residual reagents (SiH) and (Vi), and/or hydrogenation, the hydrogenation process being optionally followed by an elimination process (or another elimination process) of the products other than polyorganosiloxanes with arylalkyl function(s). The resulting silicones with arylalkyl function(s) can be used as emollients and/or carriers in cosmetic compositions, or as solubilizing agents and emollients in perfume compositions.

Abstract: The present invention relates to a process for the manufacture of dimethicone copolyol compounds, which are free of odor and consequently suitable for use in personal care products. The process is one in which water is added to the dimethicone copolyol being treated, hydrolyzing susceptible groups off the compound and azeotropically distilling off the odor bodies.

Abstract: Magnetic separators are used for treating silicon-containing materials from chlorosilane reactors to remove magnetically influenced components in the silicon-containing materials. The removal of such impurities allows for enhanced reactivity of the silicon-containing materials in processes wherein the silicon-containing materials are raw materials for the production of silicon based compounds, such as, for example, basic alkylhalosilanes such as dimethyldichlorosilane, methyldichlorosilane, and other chlorosilanes such as trichlorosilane, which chlorosilanes are useful in the preparation of valuable silicon-containing products.

Abstract: A process for preparing an organomercaptan is provided which comprises reacting a sulfide of the general formula (I) ((R1)3—Si—R2—S&Parenclosest;2Sm  (I) in which each R1 is the same or different alkyl group of up to about 6 carbon atoms, aryl group of up to about 10 carbon atoms or alkoxy group of up to about 6 carbon atoms, or at least two of R1 and the silicon atom to which they are bonded form a ring system having up to about 12 ring members with no ethylenic unsaturation and optionally containing one or more heteroatoms selected from the group consisting of oxygen, sulfur and nitrogen, each R2 is the same or different divalent hydrocarbon group containing no ethylenic unsaturation and having up to about 20 carbon atoms and m is 0 to about 8, with hydrogen under hydrogenolysis conditions in the presence of a catalytically effective amount of Group VIII metal catalyst and in the presence of a catalyst poisoning inhibiting amount of a catalyst poisoning inhibitory agent selecte

Abstract: A process for the production of linear silanol stopped siloxanes comprising: a) conducting a ring opening polymerization of a hexaorganocyclotrisiloxane having the formula: D3=(R1R2SiO)3 where R1 and R2 are independently selected from the group of one to forty carbon atom monovalent radicals, in a solvent comprising a mixture of water and a volatile polar aprotic organic solvent in the presence of catalytic amounts of a strong base; b) neutralizing the catalytic amount of the strong base with a partially neutralized salt of a polybasic acid wherein the pH ranges from about 6 to about 8; and c) washing with water.

Abstract: Processes for the synthesis of substituted silanes from alkyl magnesium compounds using a mixture of catalysts. The catalyst systems include both a copper halide and a salt of a Group IA, IIA, IIA, or IVA element or a transition metal.

Abstract: A bissilylnorbornane compound is prepared by reacting 2,5-norbornadiene with a hydrogenchlorosilane in the presence of a mixture of a palladium compound and a phosphite or a palladium complex having a phosphate ligand as a catalyst. The bissilylnorbornane compound can be produced in high yields while suppressing formation of by-product nortricyclene.

Abstract: A proportion of Cu3Si in a contact mass is determined by treating the mass with an inorganic ammonium salt, which selectively dissolves all forms of copper including free copper in deference to Cu3Si, which is not dissolved. An initial copper content of the contact mass is determined, the contact mass is treated with an inorganic ammonium salt composition to extract copper in a molecular form other than Cu3Si and extracted copper is subtracted from the initial copper content.