Three Carbons Bonded Directly To The Same Silicon Patents (Class 556/453)
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Patent number: 5605997Abstract: A process of producing an organopolysiloxane, comprising hydrolyzing and condensing an alkoxysilane having the formula:R.sub.m Si(OR.sup.1).sub.4-mwherein R is a monovalent hydrocarbon group, R.sup.1 is an alkyl group and m is an integer of 0 to 3, or a partial hydrolysis-condensation product thereof, in the presence of a fluorine compound selected from the group consisting of fluoride salt compounds and fluorine-containing silicon compounds having at least one Si-F bond in its molecule. The organopolysiloxane obtained contains little silanol groups and has a narrow molecular weight distribution. Therefore, curable silicone resin compositions containing the organopolysiloxane as a raw material have good shelf stability, drying characteristics and curability, and are free of fear of catching fire or contamination of surroundings. An organopolysiloxane having a variety of functional groups can be readily produced.Type: GrantFiled: October 5, 1995Date of Patent: February 25, 1997Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kenji Yamamoto, Masaaki Yamaya
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Patent number: 5567835Abstract: This invention relates to a novel process for preparing vinylsiloxane-BCBs (vinylsiloxane-benzocyclobutenes) comprising reacting a hydrolyzable hydrosilating reagent with an acetylene-BCB in the presence of a catalyst, then hydrolyzing the hydrolyzable vinylsilane-BCB to form a vinylsiloxane-BCB.Type: GrantFiled: October 27, 1995Date of Patent: October 22, 1996Assignee: The Dow Chemical CompanyInventors: Robert A. DeVries, Edmund J. Stark
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Patent number: 5565540Abstract: The present invention pertains to a method for the preparation of organosiloxane oligomer with the general formulaR.sup.1.sub.3 SiO(R.sup.2.sub.2 SiO).sub.n Hwhere each R.sup.1 and R.sup.2 are independently monovalent hydrocarbon groups and n has a value of 1 to 10; wherein the method comprises cohydrolyzing a triorganohalosilane and diorganodihalosilane in the presence of a basic compound in a two-layer liquid system comprised of an aqueous layer and an organic solvent layer. The method of the instant invention is a high-yield method for the preparation of organosiloxane oligomer having the silicon-bonded hydroxyl group at only one molecular chain terminal.Type: GrantFiled: July 21, 1993Date of Patent: October 15, 1996Assignee: Dow Corning Toray Silicon Co., Ltd.Inventors: Tadashi Okawa, Shuji Yamada
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Patent number: 5547604Abstract: Siloxane compounds having a smectic liquid crystal phase and the general formula ##STR1## wherein each R=alkyl, alkenyl or aryl, Q represents a monovalent group, for example alkyl, --(CH.sub.2).sub.n OM', a chiral organic group, a dye group, a non-linear optic group or the group --(CH.sub.2).sub.n L, in which L represents a siloxane group, M and M' each represent ##STR2## wherein A is carboxyl, T is CN, F or Cl and p=0 or 1, provided that when T is F or Cl x has a value of at least 2.Type: GrantFiled: February 10, 1995Date of Patent: August 20, 1996Assignee: Dow Corning LimitedInventors: Harry J. Coles, Jonathon P. Hannington, David R. Thomas
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Patent number: 5541276Abstract: A personal care composition is provided, comprising (A) an effective amount of a polyalkylsiloxane copolymer having a melting point of from about -40.degree. C. to about +40.degree. C., and being selected from various specific polyalkylsiloxane copolymer fluids of polyalkylsiloxane copolymer resins; and (B) a cosmetically acceptable carrier medium, wherein the polyalkylsiloxane copolymer contains mixtures of linear lower alkyl side chains and linear higher alkyl side chains or mixtures of linear alkyl side chains and branched alkyl side chains. The polyalkylsiloxane copolymers used in the composition are fluids or soft waxes at body temperature and have improved application and payout and better substantivity and hair conditioning properties.Type: GrantFiled: January 10, 1995Date of Patent: July 30, 1996Assignee: General Electric CompanyInventors: Raymond J. Thimineur, Frank J. Traver, Virginia M. Van Valkenburgh
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Patent number: 5539137Abstract: A method is provided for making silicone fluids having a high refractive index by effecting a hydrosilylation reaction between an arylacetylene such as phenylacetylene and a silicon hydride substrate, such as a cyclic or linear hyridosiloxane in the presence of a platinum catalyst.Type: GrantFiled: June 7, 1995Date of Patent: July 23, 1996Assignee: General Electic CompanyInventors: Larry N. Lewis, Susan A. Nye
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Patent number: 5534608Abstract: Linear triorganosiloxy-terminated polydiorganosiloxanes having a silanol content of less than about 200 ppm are prepared by condensing linear higher molecular weight polydiorganopolysiloxanediols having one Si-bonded hydroxyl group in each terminal unit and a silanol content of preferably greater than about 1000, in two separate stages, one using a fixed bed of a solid form of a conventional equilibration catalyst, and the other using a condensation/disproportionation catalyst, e.g., a phosphonitrilic halide or an oligomer thereof or a reaction product thereof with water, an alcohol, an acid, or a siloxane or silane, until the polydiorganosiloxane has reached the desired low content of silanol groups, e.g., below 200 ppm, by weight. The two stages can be carried out in either order, and a conventional monofunctional chain terminating agent can be present in either or both stages. The process preferably does not increase the cyclic byproduct content.Type: GrantFiled: January 30, 1995Date of Patent: July 9, 1996Assignee: General Electric CompanyInventors: Dennis P. Thompson, Patricia P. Anderson, Donald Slick
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Patent number: 5531813Abstract: A polyorgano amino functional oil release agent having at least 85% monoamino functionality per active molecule to interacts with the thermally stable FRM hydrofluoroelastomer surface of a fuser member of an electrostatographic apparatus to provide an interfacial barrier layer to the toner and a low surface energy film to release the toner from the surface is introduced herein.Type: GrantFiled: September 29, 1994Date of Patent: July 2, 1996Assignee: Xerox CorporationInventors: Arnold W. Henry, Donald A. Seanor, George J. Heeks, Clifford O. Eddy, Che C. Chow, Santokh S. Badesha, Samuel Kaplan, David H. Pan
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Patent number: 5521238Abstract: The present invention relates to an organopolysiloxane emulsion composition comprising a hydroxy or alkoxy-endblocked diorganopolysiloxane, an alkoxy-group containing organosilicon compound, surfactant, and water. The compositions of this invention are characterized by a lack of offensive odor, high productivity and good storage stability. The organopolysiloxane emulsions of this invention are useful as fiber treatment agents. The fibers treated with the organopolysiloxane emulsion of this invention exhibit good feel.Type: GrantFiled: December 22, 1994Date of Patent: May 28, 1996Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Isao Ona, Masaru Ozaki, Toshio Saruyama, Masahiko Suzuki
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Patent number: 5516361Abstract: A fusing system, method of fusing with a fuser member having a thermally stable FKM hydrofluoroelastomer surface for fusing thermoplastic resin toners to a substrate in an electrostatographic printing apparatus has a polyorgano T-type amino functional oil release agent, the oil having predominantly monoamino functionality per active molecule to interact with the hydrofluoroelastomer surface to provide a substantially uniform interfacial barrier layer to the toner and a low surface energy film to release the toner from the surface.Type: GrantFiled: October 17, 1994Date of Patent: May 14, 1996Assignee: Xerox CorporationInventors: Che C. Chow, Alvin D. Kromm, Jr.
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Patent number: 5516871Abstract: There is disclosed a diphenylsiloxane oligomer functionalized at both terminals and methods for the preparation thereof, said oligomer having the following general formulaG-(OSiPh.sub.2).sub.m O-G (i)wherein Ph denotes a phenyl radical, m is 3 to 50 and G has a formula independently selected from the group consisting of ##STR1## in which R, R.sup.4 and R.sup.5 are independently selected from the group consisting of methyl, phenyl and R.sup.1, R.sup.1 is selected from the group consisting of hydrogen and a monovalent hydrocarbon group having 2 to 8 carbon atoms excluding phenyl, tolyl, xylyl, and ethylphenyl radicals, Q is a divalent hydrocarbon group and k is independently 0 to 3 at each terminus of said oligomer with the proviso that k is >0 at one terminus of said oligomer, at least one substituent among R, R.sup.4 and R.sup.5 in formula (ii) is R.sup.1 and, when both R.sup.4 and R.sup.5 groups at one terminus of said oligomer are phenyl, groups R.sup.4 and R.sup.Type: GrantFiled: March 21, 1995Date of Patent: May 14, 1996Assignee: Dow Corning Asia, Ltd.Inventors: Brian R. Harkness, Mamoru Tachikawa
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Patent number: 5492992Abstract: A process for making liquid polymers by condensing monomers and/or oligomers, mixing them with a catalyst where required, and dispersing the mixture via an atomizing device to form small droplets suspended in a reaction chamber. The reagents are caused to polymerize in the dispersed state. The process is preferably carried out in a spray dryer using an atomizing device and is particularly useful for polymerizing organosilicon compounds by condensation.Type: GrantFiled: December 5, 1994Date of Patent: February 20, 1996Assignee: Dow Corning S.A.Inventor: Jean M. Gilson
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Patent number: 5493041Abstract: The crosslinking and simultaneous alkylation of poly(hydridomethylsiloxanes) form crosslinked siloxanes having n-alkylmethyl groups. Without changing the chain length of the poly(hydridomethylsiloxane) starting material, a family of lightly crosslinked siloxanes having n-alkylmethyl groups, with a range of viscosities, can be produced using one or more alpha-olefins along with a small amount of an unconjugated alpha, omega-diene added as a crosslinker. The poly(hydridomethyl siloxanes) are made from highly pure silanol-free hexamethyldisiloxane and highly pure mixtures of silanol-free tetramethylcyclotetrasiloxane (D.sup.H 4) and pentamethylcyclopentasiloxane D.sup.H 5 containing no more than about 100 parts per million (ppm) water, with anhydrous trifluoromethane sulfonic acid (triflic acid, CF.sub.3 SO.sub.3 H), at room temperature, to provide linear poly(hydridomethylsiloxanes) having degrees of polymerization of up to about 250.Type: GrantFiled: July 21, 1995Date of Patent: February 20, 1996Assignee: Dow Corning CorporationInventors: Timothy N. Biggs, Gary E. LeGrow
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Patent number: 5491250Abstract: A crude vinylically unsaturated product formed from a palladium-complex-catalyzed reaction of a reactant halide selected from the group consisting of aryl, allyl, vinyl, and benzyl halides, and a reactant olefin having a vinylic hydrogen, wherein the reaction is carried out in the presence of a hydrogen halide acceptor, is purified by first contacting the crude product with a base that is stronger than the hydrogen halide acceptor, then heating the stronger base-contacted product. The purified product shows a marked reduction in concentration bromine and palladium impurities. The product can then be further purified by such methods as chromatography, crystallization, or distillation to achieve a product that is more suitable for applications where very low levels of inorganic impurities are required.Type: GrantFiled: March 23, 1995Date of Patent: February 13, 1996Assignee: The Dow Chemical CompanyInventors: Edmund J. Stark, John A. Schultz, Ernest L. Ecker, Robert A. DeVries
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Patent number: 5486635Abstract: There is disclosed a method for preparing a diorganopolysiloxane having a functional group at only one end of the molecular chain and having the formulaR(R.sub.2 SiO).sub.p Bwherein R is an independently selected monovalent hydrocarbon group, B is selected from the group consisting of a hydrogen atom and an organosilyl group having the formula--SiR.sub.Type: GrantFiled: April 25, 1995Date of Patent: January 23, 1996Assignee: Dow Corning Toray Silicone Co., Ltd.Inventor: Tadashi Okawa
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Patent number: 5478546Abstract: An alkoxysilane is brought into a hydrolysis-polycondensation reaction using a fluoride salt, e.g. NaF, or a fluorine-containing silicon compound having an Si--F bond in its molecule, e.g. FSi(OCH.sub.3).sub.3, as a catalyst, to produce a powder of a silicon compound such as silica. The process reduces markedly the period of time required for the hydrolysis-polycondensation reaction and yields a porous silicon compound powder with low bulk specific gravity. The catalyst is excellent in handleability and safety.Type: GrantFiled: March 11, 1994Date of Patent: December 26, 1995Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kazuyuki Matsumura, Masaaki Yamaya
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Patent number: 5470934Abstract: Vinyl- and alkoxy-functional organosilicon compounds with the general formula ##STR1## in which R denotes C.sub.1 and C.sub.4 alkyl and a is 1, 2, or 3, b is 0 or 1, and a+b is 2 or 3 are made by an exchange reaction between sym-divinyltetramethyldisiloxane and vinyltrialkoxysilane or tetraalkoxysilane. These novel vinyl- and alkoxy-functional organosilicon compounds exhibit a high condensation reactivity with the silanol group.Type: GrantFiled: September 15, 1994Date of Patent: November 28, 1995Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Toshio Saruyama, Masahiko Suzuki
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Patent number: 5466849Abstract: Novel siloxane derivatives represented by general formula (1): ##STR1## A method for producing the siloxane derivatives and agents such as cosmetic preparations, emulsifying dermatotherapeutic external agents and the like including at least one of the siloxane derivatives are also disclosed.Type: GrantFiled: June 7, 1994Date of Patent: November 14, 1995Assignee: Kao CorporationInventors: Yasushi Shioya, Yuji Suzuki, Ken Takeuchi, Koji Yoshino, Akira Kawamata
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Patent number: 5457220Abstract: The present invention relates to a new silicone cure system. More particularly, the present invention discloses that a siloxane system containing sufficiently high levels of T or Q species in addition to M, D and a limited amount of silanol species can be cured by linear phosphonitrilic chloride disproportionation catalyst.Type: GrantFiled: April 29, 1994Date of Patent: October 10, 1995Assignee: General Electric CompanyInventor: John S. Razzano
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Patent number: 5446114Abstract: The invention relates to a series of novel silicone fluorinated dimethicone copolyols. This class of compounds provides breathable barriers when applied to textiles and paper. These barriers allow for the passage of water and air through the barrier, but do not allow for the passage of oils. The compounds of the present invention are prepared by reacting a silanic hydrogen containing silicone polymer with a vinyl containing fluoro compound and an allyl alcohol alkoxylate.Type: GrantFiled: December 15, 1994Date of Patent: August 29, 1995Assignee: Siltech Inc.Inventor: Anthony J. O'Lenick, Jr.
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Patent number: 5437817Abstract: Liquid crystalline organopolysiloxane is provided having the general formula:R.sub.a (A).sub.b (B).sub.c SiO.sub.(4-a-b-c)/2wherein R is independently selected from the group consisting of a hydrogen atom, hydrocarbon group having i to 4 carbon atoms, and phenyl group, A is a group of the formula: ##STR1## wherein m, n, and x are integers in the range: m.gtoreq.3, n.gtoreq.2, 5.ltoreq.m+nx.ltoreq.15, x=1 or 2, B is an organic chromophore group having an absorption peak in the visible spectrum, a, b, and c are numbers in the range: 1.ltoreq.a<2, 0<b+c.ltoreq.1, 0.45.ltoreq.b(b+c).ltoreq.0.95, and 1<a+b+c.ltoreq.3. This organopolysiloxane as a high molecular weight liquid crystal is combined with a low molecular weight liquid crystal to form a liquid crystal composition.Type: GrantFiled: November 27, 1991Date of Patent: August 1, 1995Assignees: Shin-Etsu Chemical Company, Limited, Toyota Jidosha Kabushiki KaishaInventors: Takashi Kondou, Masaaki Yamaya, Hiroshi Yoshioka, Yasuhiro Ohtsuka, Kazuo Tojima, Yasufumi Shibata, Naomi Ohkuwa, Shinobu Okayama
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Patent number: 5416233Abstract: This invention relates to a novel process for preparing vinylsilane-BCBs (vinylsilane-benzocyclobutenes) comprising reacting a hydrosilating reagent with an acetylene-BCB in the presence of a catalyst.The invention also relates to a novel mixture of isomers of DVS-bisBCB (1,3-divinyl-1,1,3,3-tetramethyldisiloxane bisbenzocyclobutene) as well as novel partially or fully cured polymers derived from the vinylsilane BCBs.Type: GrantFiled: January 25, 1994Date of Patent: May 16, 1995Assignee: The Dow Chemical CompanyInventors: Robert A. DeVries, Edmund J. Stark
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Patent number: 5408025Abstract: Linear triorganosiloxy-terminated polydiorganosiloxanes having a silanol content of less than about 200 ppm are prepared by condensing linear higher molecular weight polydiorganopolysiloxanediols having one Si-bonded hydroxyl group in each terminal unit and a silanol content of preferably greater than about 1000, in two separate stages, one using a fixed bed of a solid form of a conventional equilibration catalyst, and the other using a condensation/disproportionation catalyst, e.g., a phosphonitrilic halide or an oligomer thereof or a reaction product thereof with water, an alcohol, an acid, or a siloxane or silane, until the polydiorganosiloxane has reached the desired low content of silanol groups, e.g., below 200 ppm, by weight. The two stages can be carried out in either order, and a conventional monofunctional chain terminating agent can be present in either or both stages. The process preferably does not increase the cyclic byproduct content.Type: GrantFiled: July 15, 1993Date of Patent: April 18, 1995Assignee: General Electric CompanyInventors: Dennis P. Thompson, Patricia P. Anderson, Donald Slick
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Patent number: 5403909Abstract: Short-chain linear phosphazenes as well as products of their reactions with water, alcohols and organosiloxanes, and the like, are active catalysts for polycondensation and redistribution of organosiloxane polymers.Type: GrantFiled: July 15, 1993Date of Patent: April 4, 1995Assignee: General Electric CompanyInventor: Slawomir Rubinsztajn
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Patent number: 5399649Abstract: A method for the high-purity synthesis of a diorganopolysiloxane having a functional group at only one molecular chain terminal, that is characterized by the preliminary silylation with a silylating agent of the silanol group-containing impurity present in the cyclic trisiloxane, and that is characterized by preliminarily converting the silanol group-containing impurity in the cyclic trisiloxane into a lithiated material by lithiation with an organolithium compound and then silylating this lithiated material using a silylating agent that contains silicon-bonded halogen.Type: GrantFiled: April 25, 1994Date of Patent: March 21, 1995Assignee: Dow Corning Toray Silicone Co., Ltd.Inventor: Tadashi Okawa
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Patent number: 5386048Abstract: The invention provides silicon substituted fullerene compounds. The compounds can form polymers or wrapped fullerenes. The compounds may be made by reacting an organo-silicon compound with a fullerene in the presence of a catalyst by a hydrosilylation reaction.Type: GrantFiled: November 24, 1993Date of Patent: January 31, 1995Assignee: Wisconsin Alumni Research FoundationInventors: Robert C. West, Kunio Oka
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Patent number: 5385730Abstract: A lactone-modified silicone composition comprising a lactone-modified silicone compound of general formula (I), and a low-viscosity silicone oil of general formula (II) having a viscosity of not more than 100 cSt at 25.degree. C., a cosmetic agent containing it, and a lustering agent containing it. ##STR1## In formula (I) above, R.sup.1 is the same or a different group selected from the group consisting of an alkyl group having 1 to 30 carbon atoms, a substituted or non-substituted phenyl group having 1 to 30 carbon atoms, or a phenylalkylene group having 1 to 30 carbon atoms consisting of a substituted or non-substituted phenyl group and an alkylene group having 2 or 3 carbon atoms, and wherein at least 50 wt. % of R.sup.1 is an alkyl group having 1 to 30 carbon atoms;A and B is each the same or a different group, and represents a methyl or R.sup.2 Z group;wherein R.sup.Type: GrantFiled: January 2, 1992Date of Patent: January 31, 1995Assignee: Shin-Etsu Chemical Co., Ltd.Inventor: Shoji Ichinohe
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Patent number: 5384383Abstract: This invention pertains to pristine phenylpropylalkylsiloxanes consisting of mixtures of linear and cyclic siloxanes containing the structure ##STR1## and a method for their preparation. The pristine phenylpropylalkylsiloxanes of the instant invention contain no detectable silicon hydride (--SiH), free organics (--C.dbd.C--) or free inorganics. Additionally, the pristine phenylpropylalkylsiloxanes of the instant invention are high refractive index organosilicone polymers.Type: GrantFiled: January 31, 1994Date of Patent: January 24, 1995Assignee: Dow Corning CorporationInventors: Gary E. Legrow, Joan E. Sudbury-Holtschlag
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Patent number: 5376715Abstract: The invention relates to silicon compounds, to mixtures thereof in aromatic polycarbonates and aromatic polyester carbonates and to their use as heat stabilizers in aromatic polycarbonates and aromatic polyester carbonates.Type: GrantFiled: January 18, 1994Date of Patent: December 27, 1994Assignees: Bayer Aktiengesellschaft, Miles Inc.Inventors: Gerhard Fennhoff, Jurgen Kirsch, Karsten-Josef Idel, Klaus Kircher, Charles Lundy
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Patent number: 5359111Abstract: This invention discloses a method of controlling hydrosilylations in a reaction mixture by controlling the solution concentration of oxygen in the reaction mixture, relative to any platinum present in the reaction mixture. This invention further discloses a method for controlling isomerization in linear or branched alkenyl compounds having at least 4 carbon atoms during a hydrosilylation reaction by introducing a controlled amount of oxygen into the alkenyl compounds during the hydrosilylation. This invention further discloses a method for producing dicycloalkylsubstituted silanes by reacting a halo-or alkoxy-silane with a unsaturated cycloalkenyl compound in the presence of oxygen and a hydrosilylation catalyst.Type: GrantFiled: July 30, 1993Date of Patent: October 25, 1994Assignee: Dow Corning CorporationInventors: Don L. Kleyer, Binh T. Nguyen, Dale E. Hauenstein, Sean P. Davern, William J. Schulz, Jr.
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Patent number: 5348684Abstract: The novel silylalkyl or silylalkenyl compounds correspond to the general formula (I) ##STR1## Here the symbols A.sup.1, A.sup.2, A.sup.3 denote aromatic or heteroaromatic molecular units such as 1,4-phenylene or pyrimidine-2,5-diyl which are combined via a single bond (for k, m=0) or via functional groups M.sup.1,M.sup.2 such as CO--O or CH.sub.2 --O; j, k, l, m, n are zero or 1 (j+l+n=2 or 3). The radicals R.sup.2, R.sup.3, R.sup.4, R.sup.5 are hydrogen or alkyl/alkenyl, cycloalkyl, and the radicals R.sup.6, R.sup.7, R.sup.8 have a comparable meaning (hydrogen); R.sup.1 is alkyl/alkenyl or one of the substituents known from LC chemistry such as an .alpha.-haloalkanoic radical. In some cases compounds have wide and polymorphous liquid crystalline phases.Type: GrantFiled: August 20, 1992Date of Patent: September 20, 1994Assignee: Hoechst AktiengesellschaftInventors: Wolfgang Hemmerling, Hans-Rolf Dubal, Claus Escher, Gerhard Illian, Yoshio Inoguchi, Ingrid Muller, Mikio Murakami, Dieter Ohlendorf, Rainer Wingen
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Patent number: 5346980Abstract: Crosslinkable copolymers suitable for use as elevated temperature pressure-sensitive adhesives comprise randomly arranged silarylene units and siloxane units. Preferably, there is present in the copolymer backbone in the range of 0.8 to 1.2 siloxane to silarylene units, and there being present in the copolymer a crosslinking functionality.Type: GrantFiled: January 28, 1993Date of Patent: September 13, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventor: Gaddam N. Babu
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Patent number: 5329036Abstract: Novel acetylene-terminated silicone monomers with (a) silane (Si--H) functionalities, (b) silanol (Si--OH) functionalities, or (c) (alpha,omega)phenylethynyl terminated siloxanes, and a novel synthetic route. The (alpha,omega)phenylethynyl-terminated siloxane monomers are prepared, starting with 1,3-bromobenzene, which is converted to 3-TMS-ethynylbromobenzene, where TMS represents the trimethylsilyl group, by reacting 1,3-dibromobenzene with trimethylsilylacetylene and triethylamine in the presence of a palladium catalyst. The 3-bromo-TMS protected phenyl acetylene is then reacted with an alkyllithium compound, such as n-butyllithium, or with magnesium to form the corresponding lithio or Grignard compound, respectively, followed by reaction with a halogenated compound, such as chlorodimethylsilane, to form 3-trimethylsilyl-ethynylphenyldimethyl silane.Type: GrantFiled: September 2, 1992Date of Patent: July 12, 1994Assignee: Hughes Aircraft CompanyInventors: Thomas K. Dougherty, William E. Elias
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Patent number: 5319120Abstract: A continuous static polymerization reactor for the production of liquid polymers comprises an elongated hollow reaction chamber (30) which has a porous wall (31) and a jacket means (40) spaced around the reaction chamber (30), which is provided with means (44) for introducing a fluid through the porous wall (31). The reactor is particularly useful for a process for making liquid polymers by condensing monomers and/or oligomers. It comprising the use of a pressurized gas to cause the reaction mixture to reach a foam-like consistency. This is beneficial in the condensation polymerization. Feeding a fluid through the porous wall into the reaction chamber avoids build up of the polymer on the wall.Type: GrantFiled: July 7, 1992Date of Patent: June 7, 1994Assignee: Dow Corning S.A.Inventors: Jean-Marc Gilson, Denis Sbardella
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Patent number: 5312947Abstract: Siloxanes are purified by contacting siloxanes containing ionic crystals as an impurity with a polar solvent, evaporating the solvent, thereby increasing the mean particle size of the ion crystals, and removing the ion crystals from the siloxanes by filtration. The method enables brief, efficient purification of siloxanes in high yields, offering siloxanes having a minimal content of ionic crystals.Type: GrantFiled: September 23, 1993Date of Patent: May 17, 1994Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Akihito Tsukuno, Isao Watanuki, Makoto Sato, Masaru Suzuki, Masao Maruyama, Masaaki Furuya
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Patent number: 5306838Abstract: Novel siloxane derivatives represented by general formula (1): ##STR1## A method for producing the siloxane derivatives and agents such as cosmetic preparations, emulsifying dermatotherapeutic external agents and the like including at least one of the siloxane derivatives are also disclosed.Type: GrantFiled: August 7, 1992Date of Patent: April 26, 1994Assignee: Kao CorporationInventors: Yasushi Shioya, Yuji Suzuki, Ken Takeuchi, Koji Yoshino, Akira Kawamata
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Patent number: 5300669Abstract: An optical matching oil that is immune to timewise variations in its refractive index, that undergoes little increase in viscosity below room temperature, and that also resists crystallization below room temperature. The optical matching oil is based on an organosilicon compound with the following general formula ##STR1## wherein R is selected from the group consisting of methyl, vinyl, and 2-methylphenethyl with the proviso that at least one R group is the 2-methylphenethyl group.Type: GrantFiled: November 12, 1992Date of Patent: April 5, 1994Assignee: Dow Corning Toray Silicone Co., Ltd.Inventor: Shoji Akamatsu
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Patent number: 5282998Abstract: Mixtures of siloxane oligomers having a degree of oligomerization of 0 to 8, which have no more than one vinyl substituent attached per silicon atom as well as methoxy and/or ethoxy groups, the molar ratio of vinyl groups to alkoxy groups being 1:1 to 1:8, and in addition optionally alkyl substituents of 1 to 18 carbon atoms, the molar ratio of vinyl groups to alkyl groups being 1:0 to 1:8, are prepared by hydrolysis or cohydrolysis of vinyltrialkoxysilanes and optionally tetraalkoxysilanes and alkyltrialkoxysilanes in alcoholic solution in the presence of an acid catalyst with an amount of water calculated for the degree of oligomerization, followed by removal of the catalyst and of the free alcohol. The siloxane oligomer mixture is useful as a crosslinking agent for thermoplastic polyolefins.Type: GrantFiled: June 2, 1992Date of Patent: February 1, 1994Assignee: Huls AktiengesellschaftInventors: Michael Horn, Hans-Joachim Kotzsch
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Patent number: 5262558Abstract: There is disclosed a method for making organo-silicon polymers from alkyldisiloxanes and alkylsilicates wherein the alkyl groups of the disiloxanes have two or more carbons. Gelling of the organo-silicon polymers is avoided by; first mixing the disiloxane with the alkylsilicate and adding thereto a strong protic acid; and, after reaction has occurred in the aforementioned mixture, adding thereto, in a drop-wise manner, a solution of hydrochloric acid.Type: GrantFiled: August 20, 1992Date of Patent: November 16, 1993Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Hideki Kobayashi, Wataru Nishiumi
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Patent number: 5239101Abstract: The present invention is an anhydrous process for preparing organosiloxy end-blocked polyorganosiloxanes from chlorine end-terminated polyorganosiloxanes. The process comprises contacting an anhydrous mixture comprising a chlorine end-terminated polyorganosiloxane and an organodisiloxane with a rearrangement catalyst, where the rearrangement catalyst facilitates a chlorine and organosiloxy exchange between the chlorine end-terminated polyorganosiloxane and the organodisiloxane forming a organochlorosilane as a by-product. The organochlorosilane is continuously removed from the process providing a means by which the chlorine displaced from the chlorine end-terminated polyorganosiloxane can be effectively removed from the organosiloxy end-blocked polyorganosiloxanes in a useable form. The present process is especially useful for the rearrangement of chlorine end-terminated polyorganosiloxanes having one or more hydrogen atoms bonded to silicon to organosiloxy end-blocked polyorganohydrosiloxanes.Type: GrantFiled: December 21, 1992Date of Patent: August 24, 1993Assignee: Dow Corning CorporationInventors: Gary N. Bokerman, David E. Puckett, Larry H. Wood
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Patent number: 5233071Abstract: Alpha-fluorinated olefins are hydrosilated using selected cobalt compounds as catalysts. The products are useful in coatings, and as chemical intermediates, elastomers, and caulks.Type: GrantFiled: March 17, 1992Date of Patent: August 3, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventor: Lech Wilczek
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Patent number: 5217645Abstract: A mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sub.1 denotes a linear or branched alkyl group having 2-16 carbon atoms capable of including one or non-neighboring two methylene groups which can be replaced with --O--, --S--, --CO--, --COO-- or --OCO-- and capable of including a hydrogen atom which can be replaced with a fluorine atom; A denotes --A.sub.1 -- or --A.sub.1 --A.sub.2 --; B.sub.2 denotes --B.sub.3 -- or --B.sub.3 --B.sub.4 --; A.sub.1, A.sub.2, B.sub.1, B.sub.3 and B.sub.4 independently denote ##STR2## wherein Y.sub.1 and Y.sub.2 independently denote a hydrogen atom, F, Cl, Br, --CH.sub.3, --CN or --CF.sub.3, with the proviso that B.sub.1 can be a single bond; Z.sub.1 and Z.sub.2 independently denote a single bond, --COO--, --OCO--, --CH.sub.2 O-- or --OCH.sub.2 --; Z.sub.3 denotes --O--, --CO--, --COO-- or --OCO--; R.sub.2, R.sub.3 and R.sub.Type: GrantFiled: September 13, 1991Date of Patent: June 8, 1993Assignee: Canon Kabushiki KaishaInventors: Takashi Iwaki, Takao Takiguchi, Takeshi Togano, Yoko Yamada, Shinichi Nakamura
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Patent number: 5166363Abstract: A process for producing (i) a 1,3-bis(dicarboxyphenyl)disiloxane derivative represented by the general formula ##STR1## wherein Rs and R's independently of one another denote methyl or phenyl or (ii) a 1,3-bis(dicarboxyphenyl)-disiloxane derivative dianhydride represented by the general formula ##STR2## wherein Rs and R's are as defined above, the process comprising coupling a Grignard reagent of halo-o-xylene with a disubstituted halosilane represented by the general formula ##STR3## wherein R and R' are as defined above and X denotes halogen, to form a dimethylphenyl(disubstituted silane) represented by the general formula ##STR4## wherein R and R' are as defined above, hydroxylating the dimethylphenyl(disubstituted silane) to form a dimethylphenyl(disubstituted hydroxysilane) represented by the general formula ##STR5## wherein R and R' are as defined above, to form a 1,3-bis(dimethylphenyl)-disilanedehydrating-condensing the dimethylphenyl-(disubstituted hydroxysilane derivative represented by the generalType: GrantFiled: December 9, 1991Date of Patent: November 24, 1992Assignee: Hitachi Chemical Company, Ltd.Inventors: Tohru Kikuchi, Toshiyuki Fujita, Koichi Kamijima, Takayuki Saito
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Patent number: 5158702Abstract: The present invention relates to compounds of the formula ##STR1## in which Z is a radical bonded to the benzene ring in the 2-, 3-, 5- or 6-position, namely a halogen atom, a cyano group or a hydroxyl group,n is 0, 1 or 2,R" is a radical of the formulaR'''--[Si(R*).sub.2 ](CH.sub.2).sub.y R""-- (9),in whichY is an integer from 4 to 18,R''' is as defined in the description,R* is identical or different, optionally substituted C.sub.1 - to C.sub.18 -hydrocarbon or hydrocarbonoxy radicals,R"" is a radical of the formula --(E).sub.z -- which is optionally bonded to the carboxy group via a phenylene or biphenylene radical, whereE is a divalent radical of the formula --O-- or --Si(R*).sub.2 --, andZ is the number 0 or 1, and the radicalR' is a halogen atom, a cyano radical, a cholesteryl radical, a radical as defined for R* or of the formula --C.sub.6 H.sub.4 --R**, andR** may have any meaning of R*, with the exception of an n-octyloxy or an n-decyloxy radical,and the preparation and use thereof.Type: GrantFiled: June 22, 1990Date of Patent: October 27, 1992Assignee: Consortium fur Elektrochemische Industrie GmbHInventors: Wolfgang Haas, Norman Haberle, Rainer Winkler, Franz-Heinrich Kreuzer
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Patent number: 5144054Abstract: Novel siloxane derivatives represented by general formula (1): ##STR1## A method for producing the siloxane derivatives and agents such as cosmetic preparations, emulsifying dermatotherapeutic external agents and the like including at least one of the siloxane derivatives are also disclosed.Type: GrantFiled: August 27, 1991Date of Patent: September 1, 1992Assignee: Kao CorporationInventors: Yasushi Shioya, Yuji Suzuki, Ken Takeuchi, Koji Yoshino, Akira Kawamata
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Patent number: 5136069Abstract: A process for preparing a vinylically-unsaturated product compound comprises reacting a halogenated organic compound with a hydrolytically-stable, vinylically-unsaturated precursor compound in the presence of (a) a homogeneous zerovalent palladium catalyst complex, (b) an inorganic hydrogen halide acceptor and (c) diluent, wherein the diluent is water or an aqueous solution containing up to 95% by volume of an organic solvent. The halogenated organic compound is selected from aryl halides, benzyl halides or vinylic halides. The hydrolytically-stable, vinylically-unsaturated precursor compound is selected from hydrocarbon compounds or compounds containing at least one of an oxygen atom, a nitrogen atom, a sulfur atom, a phosphorus atom, silicon atom or a combination thereof.Type: GrantFiled: March 28, 1991Date of Patent: August 4, 1992Assignee: The Dow Chemical CompanyInventors: Robert A. DeVries, Hughie R. Frick, deceased
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Patent number: 5126470Abstract: This invention relates to a non-aqueous method for preparing disiloxanes, copolymeric siloxanes, and cyclic siloxanes containing phenyl, higher alkyl, and certain reactive groups bonded to silicon atoms using selenium dioxide as a catalyst. The siloxanes which are formed using this method can be separated from the reaction mixture and purified.Type: GrantFiled: April 10, 1991Date of Patent: June 30, 1992Assignee: Dow Corning CorporationInventors: William J. Schulz, Jr., John L. Speier
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Patent number: 5113006Abstract: Novel organosilicon compounds containing alkenyl groups and comprising units of the average formula ##STR1## in which R and R.sup.1 are hydrocarbon containing groups, and A is a radical of the formula ##STR2## in which R.sup.2, R.sup.3 and R.sup.4 are hydrocarbon containing groups; x is 0 or 1; y is 0 or 1, with the proviso that the sum x+y is 1 or 2; a is 0 or 1, with an average of 0.003 to 1.0; b is 0, 1, 2 or 3, with an average of 0.0 to 3.0; c is 0, 1, 2 or 3; with an average of 0.0 to 3.0; and the sum a+b+c.ltoreq.4, with an average of 1.5 to 4.0, with the proviso that each molecule contains at least one A radical and a method for preparation of the novel compounds are disclosed.Type: GrantFiled: October 9, 1990Date of Patent: May 12, 1992Assignee: Wacker-Chemie GmbHInventor: Christian Herzig
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Patent number: 5113003Abstract: The silicon-containing phenoxy ethers are of the formula III: ##STR1## wherein R.sup.1 and R.sup.2 which may be the same or different are selected from H, --R.sup.3 --X, aliphatic hydrocarbyl having 1-6 carbon atoms or aryl, or substituted derivatives thereof, provided that not more than one of R.sup.1 and R.sup.2 is H;R.sup.3 is a divalent C.sub.1 -C.sub.30 aliphatic and/or aromatic hydrocarbyl group which may optionally be substituted, or interrupted, by a hetero atom;R.sup.4 and R.sup.5 which may be the same or different are H, ##STR2## or an ortho para directing activating group for aromatic electrophilic substitution, other than an amine;and X is a reactive functional group capable of undergoing an acid-catalyzed electrophilic aromatic substitution reaction with a phenol, for example an aldehyde group. They can be polymerized to produce silicone-modified polymers of the phenol-aldehyde type without the use of free aldehyde.Type: GrantFiled: March 20, 1991Date of Patent: May 12, 1992Assignee: Loctite (Ireland) LimitedInventors: John G. Woods, Pauline Coakley
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Patent number: RE35462Abstract: The present invention relates to compounds of the formula ##STR1## in which Z is a halogen atom, a cyano group or a hydroxyl group,n is 0, 1 or 2,R' is a radical of the formulaR"'--[Si(R*).sub.2 ].sub.x (CH.sub.2).sub.y R""-- (9),in whichx is the number 0 or 1,y is an integer from 1 to 18,R"'is a defined in the description,R* is identical or different, optionally substituted C.sub.1 - to C.sub.18 -hydrocarbon or hydrocarbonoxy radicals,R"" is a phenylene or biphenylene radical or a radical of the formula --E--, whereE is a divalent radical of the formula --O-- or --[Si(R*).sub.2 ].sub.z --, andz is the number 0 or 1,and the compounds contain at least one group of the formula --Si(R*).sub.2 -- per molecule, and the radicalR" is a cholesteryl radical, a radical as defined for R* or a radical of the formula --C.sub.6 H.sub.4 --R*,and the preparation and use thereof.Type: GrantFiled: February 7, 1994Date of Patent: February 25, 1997Assignee: Consortium fur elekochemische Ind. GmbHInventors: Wolfgang Haas, Norman Haberle, Rainer Winkler, Franz-Heinrich Kreuzer