Material Contains A Phosphorus Or Sulfur Atom Patents (Class 528/23)
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Patent number: 6337382Abstract: Silanol group-containing organosilicon compounds having a low average degree of polymerization are prepared in an efficient and inexpensive manner by adding water at pH 1-5 to an organooxysilane, mixing them, thus forming a hydrolyzed organooxysilane mixture, and adding a mono- and/or di-alkali metal salt of phosphoric acid to the mixture so as to give pH 5-9.Type: GrantFiled: May 12, 2000Date of Patent: January 8, 2002Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Minoru Igarashi, Keiji Shibata
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Patent number: 6306502Abstract: A coating composition forming a abrasion resistant coating comprising (A) an ultraviolet-curable silicone prepared by chemically modifying particulate colloidal silica with a specific silane compound, (B) a monomer mixture comprising a (meth)acrylate having a specific isocyanate skeleton and a urethane poly(meth)acrylate having an alicyclic skeleton, and (C) a photo-polymerization initiator. By using a urethane poly(meth)acrylate having an alicyclic skeleton as part of the component (B) and the component (A) having an enhanced reactivity of chemical modification, the compatibility of the component (A) with the component (B) is improved to give a cured coating with excellent wear resistance, weather resistance and durability.Type: GrantFiled: March 19, 1998Date of Patent: October 23, 2001Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Hiroshi Fukushima, Misao Tamura, Osamu Takemoto, Katsumi Yonekura
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Patent number: 6303728Abstract: The present invention has its object to provide an effective method of accelerating a hydrosilylation reaction. This invention is related to a hydrosilylation reaction method which comprises carrying out the hydrosilylation reaction between a silicon compound (A) represented by the following general formula (1) and an alkenyl group-containing compound (B) in the presence of a Group VIII metal-containing catalyst (C) and a sulfur compound (D); RaXbHcSi (1).Type: GrantFiled: March 3, 2000Date of Patent: October 16, 2001Assignee: Kaneka CorporationInventors: Shigeru Hagimori, Koji Tsuneishi, Yoshimichi Yamanaka, Syun Wachi, Kazuya Yonezawa
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Method for manufacturing silicon compound having substituents bonded to silicon atoms via Si-C bonds
Patent number: 6297340Abstract: 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.Type: GrantFiled: June 27, 2000Date of Patent: October 2, 2001Assignee: Dow Corning Asia, Ltd.Inventor: Mamoru Tachikawa -
Patent number: 6294634Abstract: A method of preparing organosilicon compositions by heating various mixtures of (i) dimethylcyclosiloxanes or methylhydrogencyclosiloxanes, (ii) homopolymeric and copolymeric cyclosiloxanes containing a C5 or more carbon atom containing group, and (iii) homopolymeric and copolymeric cyclosiloxanes containing an oxyalkylene segment, in the presence of a catalyst, at a temperature and for a time sufficient to cause polymerization of cyclosiloxanes (i) to (iii) to the desired organosilicon composition.Type: GrantFiled: March 28, 2000Date of Patent: September 25, 2001Assignee: Dow Corning CorporationInventors: Michael Salvatore Ferritto, William James Schulz, Jr.
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Patent number: 6291540Abstract: The invention concerns a novel method for preparing non-toxic resins crosslinkable under radiation in the presence of an initiator system. Said resins are prepared from compositions of an organic and/or silicon type comprising monomers, oligomers and/or polymers with organofunctional groups, and are cross-linked in the presence of an initiator system consisting of an onium salt with low toxicity whereof the cationic structure is [(CH(CH3)2—C6H4—)—I—(—R1)]+(I).Type: GrantFiled: March 10, 2000Date of Patent: September 18, 2001Assignee: Rhodia ChimieInventors: Christian Priou, Jacques Richard
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Patent number: 6288195Abstract: An organopolysiloxane gum is prepared by polymerizing a cyclic organopolysiloxane with a low molecular weight linear organopolysiloxane end-blocked with a triorganosilyl group in the presence of a thermally decomposable catalyst. After the polymerization reaction, the catalyst is deactivated by heating the reaction product under a subatmospheric pressure of typically up to 500 mmHg.Type: GrantFiled: December 2, 1999Date of Patent: September 11, 2001Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Masaharu Takahashi, Yutaka Hagiwara, Minoru Igarashi, Kenji Tawara, Yoshio Tomizawa
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Patent number: 6284859Abstract: A polymerization process comprising mixing siloxanes having silicon-bonded groups R′ with ionic phosphazene base catalysts and allowing condensation via reaction of Si—R′ groups with the formation of a Si—O—Si linkage, R′ denoting a hydroxyl group or a hydrocarbonoxy group having up to 8 carbon atoms is claimed. The catalysts may be of the general formulae: {((R12N)3P═N—)x(R12N)3−xP—N(H)R2}+{A−} or {((R12N)3P═N—)y(R12N)4−yP}+{A}− in which R1 is hydrogen or an optionally substituted hydrocarbon group or in which two R1 groups bonded to the same N atom may be linked to complete a heterocyclic ring, R2 is hydrogen or an optionally substituted hydrocarbon group, x is 1, 2 or 3, y is 1, 2, 3 or 4 and A is an anion.Type: GrantFiled: December 9, 1999Date of Patent: September 4, 2001Assignee: Dow Corning LimitedInventors: Peter Hupfield, Avril Surgenor, Richard Taylor
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Patent number: 6284860Abstract: The present invention pertains to the preparation of organopolysiloxanes containing organyloxy groups by reacting organopolysiloxane(s) bearing terminal hydroxyl groups with an alkoxysilane having at least two alkoxy groups and a radical which contains at least one secondary or tertiary amino group bonded to silicon by a divalent C1-2 hydrocarbon radical, the reaction being catalyzed by an acidic ester of phosphoric acid having the formula (HO)aOP—(O—R7)3−a Where R7 is an oxyalkylated active hydrogen component, preferably an oxyalkylated fatty alcohol. RTV-1 compositions containing the reaction product exhibit extended storage life.Type: GrantFiled: January 20, 2000Date of Patent: September 4, 2001Assignee: Wacker-Chemie GmbHInventors: Oswin Sommer, Wolfgang Hechtl, Stefan Oberneder, Norman Dorsch, Rudolf Heinrich
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Patent number: 6281285Abstract: 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.Type: GrantFiled: June 9, 1999Date of Patent: August 28, 2001Assignees: Dow Corning Corporation, Dow Corning Asia, Ltd.Inventors: Gregory Scott Becker, Leslie Earl Carpenter, II, Russell Keith King, Tetsuyuki Michino, Eric Scott Moyer
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Patent number: 6271330Abstract: Terminally functionalized silicone polymers prepared using protected functionalized initiators and processes for preparing the same. The silicone polymers includes protected, functionalized silicone polymers, such as mono-functional, homotelechelic, heterotelechelic, macromonomer, and radial polymers. The protected functionalized polymers can be optionally deprotected to afford functionalized silicone polymers.Type: GrantFiled: August 12, 1999Date of Patent: August 7, 2001Assignee: FMC CorporationInventors: Robert James Letchford, James Anthony Schwindeman, Roderic Paul Quirk
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Patent number: 6254811Abstract: Alkoxy RTV-1 compositions comprise the product of the reaction of (A) an HO-terminated organopolysiloxane, (B1) an alkoxysilane which has at least three alkoxy groups and/or its partial hydrolysates, and (B2) an alkoxysilane which has two alkoxy groups and/or its partial hydrolysates, in the presence of (C) an acid phosphoric ester of the general formula (I) (HO)aOP(—O—[(CR12)b—O]c[(CR22)d]e—L—M)(3−a) (I), where a is 1 or 2, R1 and R2 are a hydrogen radical, methyl radical or hydroxyl radical, b and d are 2 or 3, c is an integer from 2 to 15, e is 0 or 1 L comprises a radical —O—, —COO—, —OOC—, —CONR3—, —NR4CO— or —CO—, R3 and R4 are a hydrogen radical or C1-C10-alkyl radical, and M is a monovalent, unsubstituted or hydroxyl-, fluorine-, chlorine-, bromine-, C1-C10-alkoxyalkyl- or cyano-substituted C1-C20-hydrocarbon radical, with the proviso that on any givType: GrantFiled: December 1, 1999Date of Patent: July 3, 2001Assignee: Wacker-Chemie GmbHInventors: Christian Finger, Norman Dorsch, Wolfgang Hechtl, Christian Baumgartner, Alfred Heinrich
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Patent number: 6251486Abstract: An improved siloxane-based composition for use as a low &kgr; dielectric material in integrated circuit applications is provided, the composition exhibiting desirable thermal mechanical stability compared to conventional siloxane-based low-&kgr; compositions. Specifically, the invention provides a modified methylsilsesquioxane composition suitable for higher temperature applications than a composition formed from only methylsilsesquioxane. The modified oligomer is characterized by the pendant group ratio A:B:C, where A represents the percentage of pendant groups that are methyl and is about 13 to about 67, B represents the percentage of pendant groups that are dimethyl and is greater than 0 to about 33, and C represents the percentage of pendant groups that are phenyl and is greater than 0 to about 67. The presence of dimethyl and phenyl pendant groups provides a molecular structure that has improved crack-resistance compared to an all-methyl silsesquioxane.Type: GrantFiled: July 11, 1999Date of Patent: June 26, 2001Assignee: Agere Systems Guardian Corp.Inventors: Edwin Arthur Chandross, Valerie Jeanne Kuck
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Patent number: 6245852Abstract: A stable organopolysiloxane emulsion is briefly prepared by emulsifying and dispersing a low molecular weight organopolysiloxane (A) in water in the presence of an organic sulfonic acid or organic sulfate anionic surfactant (B) to form an initial emulsion having a mean particle size of up to 300 nm, and effecting polymerization reaction, followed by neutralization.Type: GrantFiled: August 12, 1999Date of Patent: June 12, 2001Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kohei Hasegawa, Satoshi Kuwata
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Patent number: 6235861Abstract: An addition-curing organopolysiloxane composition which has excellent shelf stability around room temperature, rapidly cures by moderate ultraviolet irradiation or heating, and is suitable for use as the one solution type. A reaction inhibitor is added to the composition comprising an alkenylated organopolysiloxane, an organohydrogenpolysiloxane, and a platinum catalyst. The inhibitor is a thiophene compound, an isocyanide compound, a cyclic thioether compound, a cyclic azo ether compound, an imino compound, or a polymer which has, in the molecule, functional groups each containing one or more sulfur, nitrogen, or phosphorus atoms and has an average molecular weight of 1,000 to 200,000, and which is capable of forming a complex with a platinum atom.Type: GrantFiled: June 16, 1999Date of Patent: May 22, 2001Assignee: Three BondInventor: Katsuhiko Kishi
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Patent number: 6232425Abstract: A process for making organosilyl end-stopped diorganopolysiloxane fluid is provided comprising the steps of reacting an organic end-stopping compound with a fluorosilicone trimer in the presence of a catalytic amount of linear phosphonitrilic acid, and inactivating the linear phosphonitrilic acid, thereby forming organosilyl end-stopped diorganopolysiloxane fluid.Type: GrantFiled: December 31, 1998Date of Patent: May 15, 2001Assignee: General Electric CompanyInventors: John S. Razzano, Nancy E. Gosh
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Patent number: 6221993Abstract: A continuous process for producing a silicone polymer comprises the sequential steps of (i) polymerisation of a linear silanol group containing siloxane by condensation polymerisation, or of a cyclosiloxane by ring opening polymerisation, or of a mixture of said linear and cyclosiloxanes with a phosphazene base in the presence of water and the presence or absence of a filler in an extruder, (ii) neutralising the reaction mixture in an extruder, and (iii) stripping the neutralised reaction mixture to remove volatile materials. Preferably, step (iii) is performed in an extruder, more preferably steps (i), (ii) and (iii) are all performed in the same extruder.Type: GrantFiled: August 26, 1999Date of Patent: April 24, 2001Assignee: Dow Corning LimitedInventors: John Currie, Phillip Griffith, William Herron, Richard Taylor
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Patent number: 6221996Abstract: An organopolysiloxane gum is prepared by polymerizing a cyclic organosiloxane with a low molecular weight, linear organopolysiloxane end-blocked with a triorganosilyl group in the presence of an alkaline catalyst. The polymerization reaction is effected under a reduced pressure, typically of 500 mmHg or lower.Type: GrantFiled: November 12, 1999Date of Patent: April 24, 2001Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Keiji Shibata, Kenji Tawara
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Patent number: 6218445Abstract: The invention concerns a composition cross-linkable under radiation. The composition includes at least one polyorganosiloxane with cross-linkable functional groups, a stabilizing amino agent, and an initiator system for hardening under radiation. The composition is stable for use and storage.Type: GrantFiled: January 10, 2000Date of Patent: April 17, 2001Assignee: Rhodia ChimieInventors: Christian Priou, Andre Soldat, Stuart R. Kerr, III, Reeshemah Beaty
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Patent number: 6214962Abstract: An organopolysiloxane gum is continuously prepared by (I) mixing at least one cyclopolysiloxane with an end capping agent, (II) feeding the mixture to a self-cleaning reactor along with a polymerization catalyst of thermal decomposition type, and effecting polymerization at a temperature of 80-130° C., (III) heating the reaction mixture of step (II) at a temperature of 130-200° C. under subatmospheric pressure for deactivating the catalyst, thereby terminating the polymerization reaction, and (IV) continuously removing the cyclopolysiloxane and volatile components from the reaction product.Type: GrantFiled: December 2, 1999Date of Patent: April 10, 2001Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Masaharu Takahashi, Yutaka Hagiwara, Minoru Igarashi, Keiji Shibata, Kenji Tawara, Yoshio Tomizawa
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Patent number: 6214961Abstract: A method of producing a branched silicone oil which comprises mixing 100 parts by weight of an organopolysiloxane represented by the following formula (I) and/or an organopolysiloxane represented by the following formula (II) with 0.1 to 100 parts by weight of an organopolysiloxane represented by the following formula (III) and causing these oranopolysiloxanes to undergo condensation and equilibration reactions by heating them in the presence of basic catalysts: wherein R1 and R2 are each a monovalent hydrocarbon group containing 1 to 20 carbon atoms, m is an integer from 3 to 7, and n is an integer of 0 or above; wherein R3 is a monovalent hydrocarbon group containing 1 to 20 carbon atoms, p is a number from 1 to 100, and q is a number from 0 to 100.Type: GrantFiled: November 27, 1998Date of Patent: April 10, 2001Assignee: Shin-Etsu Chemical Co., Ltd.Inventor: Yoshitaka Aoki
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Patent number: 6204350Abstract: Cure-on-demand, moisture-curable compositions of one or more compounds comprising molecules having reactive silane functional groups and an acid generating material are taught herein. The acid generating material releases an acid upon exposure to heat, ultraviolet light, visible light, electron beam irradiation or microwave irradiation to initiate and accelerate the crosslinking reaction. Articles prepared using the moisture curable materials are also disclosed, as are methods of curing those materials.Type: GrantFiled: September 16, 1998Date of Patent: March 20, 2001Assignee: 3M Innovative Properties CompanyInventors: Junkang Jacob Liu, Charles M. Leir, George G. I. Moore, Audrey A. Sherman, Albert I. Everaerts, Marie A. Boulos
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Patent number: 6201063Abstract: Emulsion polymerization techniques can be improved by using in the reaction, a precursor which is a cocyclic silicone which has a structure generally corresponding to the formula: where a and b have a value of 1-10; R3, R4, and R5 are alkyl groups containing 1-6 carbon atoms; and R6 is a C8 or higher alkyl group such as —(CH2)7CH3, —(CH2)11CH3, or —(CH2)15CH3. R3, R4, and R5 are preferably methyl groups. Aminosiloxanes or aminosilanes can also be included in this polymerization process.Type: GrantFiled: July 8, 1999Date of Patent: March 13, 2001Assignee: Dow Corning CorporationInventors: Daniel Joseph Halloran, Judith Mervane Vincent
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Patent number: 6187890Abstract: Curable organopolysiloxane compositions comprising a platinum catalyst selected from the group consisting of (PR23)2Pt(—C≡C—R3)2 (III), (R22P—R4—PR22)Pt(—C≡C—R3)2 (IV) and H—C≡C—R5—C≡C—[—Pt(PR23)2—C≡C—R5—C≡C—]e—H (V) where R2, R3, R4, R5 and e are as defined in claim 1.Type: GrantFiled: August 13, 1999Date of Patent: February 13, 2001Assignee: Wacker-Chemie GmbHInventors: Armin Fehn, Frank Achenbach, Stefan Dietl
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Patent number: 6184330Abstract: A continuous process for producing a silicone polymer comprises the sequential steps of (i) polymerisation of a linear silanol group containing siloxane by condensation polymerisation, or of a cyclosiloxane by ring opening polymerisation, or of a mixture of said linear and cyclosiloxanes with a phosphazene base in the presence of water and the presence or absence of a filler in a static mixer, (ii) neutralising the reaction mixture in a static mixer, an in-line mixer or an extruder, and (iii) stripping the neutralised reaction mixture to remove volatile materials. Preferably step (ii) is performed in a static mixer and step (iii) is performed in a thin film stripper, extruder or co-rotating processor.Type: GrantFiled: August 26, 1999Date of Patent: February 6, 2001Assignee: Dow Corning LimitedInventors: John Currie, Phillip Griffith, William Herron, Richard Taylor
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Patent number: 6166163Abstract: A process for producing an organosilicon resin is disclosed. The process includes the steps of equilibrating a mixture of silane compounds of Si(OR.sup.3).sub.4 wherein R.sup.3 's are a monovalent hydrocarbon group having 1 to 6 carbon atoms; R.sup.2 Si(OR.sup.4).sub.3 wherein R.sup.2 is a monovalent hydrocarbon group having 1 to 20 carbon atoms, and R.sup.4 's are a monovalent hydrocarbon group having 1 to 6 carbon atoms; and R.sup.1.sub.3 SiX wherein X is an --OH group, an --OSiR.sup.1.sub.3 group or a hydrolyzable group, and R.sup.1 's are a monovalent hydrocarbon group having 1 to 6 carbon atoms; adding water to the product of the equilibration reaction to carry out hydrolysis reaction; and adding an aqueous alkali to the product of the hydrolysis reaction to carry out condensation reaction. The organosilicon resin obtained is well dispersible in a resin premix containing a polyol, a blowing agent, a catalyst and a foam stabilizer, and also is highly hydrophobic and low reactive.Type: GrantFiled: June 13, 2000Date of Patent: December 26, 2000Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Muneo Kudo, Shinichi Morioka, Mitsuo Asai
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Patent number: 6140446Abstract: A hydrosilylation catalyst is provided wherein a platinum catalyst is enclosed in a heat-fusible compound having a melting point of 40-200.degree. C. and containing an aliphatic unsaturated bond, carbonyl, carboxyl or thioether radical in a molecule. The catalyst is blended in organo-polysiloxane to form a silicone composition having both shelf stability and fast-curing capability.Type: GrantFiled: November 5, 1998Date of Patent: October 31, 2000Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Hironao Fujiki, Kei Miyoshi, Hironobu Muramatsu
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Patent number: 6124418Abstract: The invention provides a method for making a curable epoxysilicone composition through the hydrosilation reaction between an ethylenically unsaturated epoxide and an SiH-containing silicone to produce an epoxysilicone product, and catalyzed by a quaternary ammonium, phosphonium or arsonium hexahaloplatinate which does not promote the oxirane ring-opening reaction of either the ethylenically unsaturated epoxide starting material or the epoxysilicone product. The invention also provides for a curable epoxysilicone composition made by the above method.Type: GrantFiled: February 14, 1994Date of Patent: September 26, 2000Assignee: General Electric CompanyInventors: James Vincent Crivello, Mingxin Fan
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Patent number: 6113815Abstract: The composition formed by mixing an organosilane with an ether. Water-stabilized organosilane compounds. A water stable composition made from the ether and organosilane composition and water. A method of treating a substrate by mixing or contacting the substrate with the product, compound, or composition of this invention for a period of time sufficient for treatment of the substrate. A treated substrate having adhered thereto the product, compound, or composition of this invention. A method of dyeing and treating a substrate. A method of antimicrobially treating a food article. A method of antimicrobially coating a fluid container. A method of antimicrobially coating a latex medical article.Type: GrantFiled: July 16, 1998Date of Patent: September 5, 2000Assignee: Bioshield Technologies, Inc.Inventors: Jacques E. Elfersy, Joachim Berkner, Timothy C. Moses
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Patent number: 6093782Abstract: Crosslinkable compositions comprise novel organosilicon compounds (B.sup.1) containing Si-bonded hydrogen atoms and comprising(a) units of the formulaH.sub.a R.sub.2-a SiO.sub.2 O.sub.2/2 (I),where R is as defined in claim 1 and a is 0, 1 or 2, with the proviso that at least 20 mol % of the units of the formula (I) are ones in which a is 1 or 2,(b) carbostructural units G (II), where G are identical or different and are each a trivalent to decavalent aliphatic hydrocarbon radical having from 7 to 30 carbon atoms per radical, which may contain one or more heteroatoms selected from the group consisting of oxygen, boron, silicon, tin or titanium, with the proviso that at least three Si atoms are connected to one another via G,(c) units of the formula ##STR1## where b is 0, 1 or 2, with the proviso that b in formula (III') is not 2 and with the proviso that the units of the formula (III) or (III') are connected via the Si atoms to the carbostructural units G and(d) units of the formulaH.sub.c R.sub.3-c SiO.sub.Type: GrantFiled: December 1, 1998Date of Patent: July 25, 2000Assignee: Wacker-Chemie GmbHInventors: Christian Herzig, Oliver Zollner
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Patent number: 6075110Abstract: A stain-proofing agent comprising a compound represented by the formula (1): ##STR1## and non-aqueous composition for paints comprising the stain-proofing agent, resin, curing agent and/or curing catalyst and being capable of forming a coating film remarkably excellent in stain-proofing property.Type: GrantFiled: August 18, 1997Date of Patent: June 13, 2000Assignee: Daikin Industries, Ltd.Inventors: Haruhiko Mohri, Susumu Wada, Akira Chida, Masaru Nagato, Keiko Kunimasa, Yoshiki Shimizu
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Patent number: 6066700Abstract: A process for the production of polysiloxane/polycarbonate block cocondensation products is disclosed. The process comprises reacting in the melt at temperatures of 250 to 320.degree. C. and pressures of 0.01 to 100 mbar (a) a hydroxyaryloxy-terminated dimethylsiloxane with (b) an oligocarbonate. The oligocarbonate is characterized in that its weight average molecular weight is 3000 to 24000 and the molar ratio of its OH end groups to aryl end groups is 10:90 to 70:30. The weight ratio of said (a) to said (b) in the inventive process is between 1:99 and 40:60. Also disclosed are the products prepared by the process.Type: GrantFiled: July 9, 1999Date of Patent: May 23, 2000Assignee: Bayer AktiengesellschaftInventors: Annett Konig, Wolfgang Ebert, Walter Kohler
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Patent number: 6063887Abstract: A 1-acyloxy-organotetrasiloxane represented by the general formula: ##STR1## wherein R.sup.1 is a monovalent organic group containing an acryloyloxy group or a monovalent organic group containing a methacryloyloxy group, and R.sup.2 is a monovalent hydrocarbon group, and a process for producing the above mentioned 1-acyloxy-organotetrasiloxane, which is characterized by subjecting hexamethylcyclotrisiloxane to a ring-opening reaction with an acyloxysilane represented by the general formula: ##STR2## wherein R.sup.1 is a monovalent organic group containing an acryloyloxy group or a monovalent organic group containing a methacryloyloxy group, and R.sup.2 is a monovalent hydrocarbon group, in the presence of an acidic catalyst.Type: GrantFiled: May 18, 1998Date of Patent: May 16, 2000Assignee: Dow Corning Toray Silicone Co., Ltd.Inventor: Tadashi Okawa
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Patent number: 6054549Abstract: This invention relates to alkenyl ether functional polyisobutylenes. This invention also relates to a method of making alkenyl ether functional polyisobutylene polymers comprising reacting a mixture comprising an alkoxysilyl-functional polyisobutylene polymer, an alkenyl ether compound, and a transesterification catalyst. This invention also relates to a method of making an alkenyl ether functional polyisobutylene polymer comprising reacting a mixture comprising a polyisobutylene containing at least one hydrolyzable group, an alkenyl ether compound, and a solvent. The alkenyl ether functional polyisobutylenes of this invention have high moisture vapor barrier, high damping characteristics, and a high refractive index.Type: GrantFiled: November 25, 1998Date of Patent: April 25, 2000Assignees: Dow Corning Asia, Ltd., Dow Corning CorporationInventors: Maneesh Bahadur, Toshio Suzuki
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Patent number: 6054548Abstract: A process for producing a silicone polymer having a volatile material content of less than 1% by weight, preferably less than 0.1% by weight, comprises the sequential steps of (i) producing an unstripped silicone polymer by polymerisation of a linear silanol group containing siloxane by condensation polymerisation, or of a cyclosiloxane by ring-opening polymerisation, or of a mixture of said linear and cyclosiloxanes, with a phosphazene base in the presence of water and the presence or absence of a filler, (ii) neutralising the catalyst, and (iii) stripping the unstripped silicone polymer, preferably at temperatures of 200.degree. C. and above.Type: GrantFiled: August 26, 1999Date of Patent: April 25, 2000Assignee: Dow Corning LimitedInventors: John Currie, Phillip Griffith, William Herron, Richard Taylor
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Patent number: 6048819Abstract: A catalyst composition for use in the preparation of an organopolysiloxane comprises a .gamma.-butyrolactone carrier and a phosphonitrile catalyst. Preferred phosphonitrile catalysts comprise Cl.sub.3 PNPCl.sub.2 NPCl.sub.3.PCl.sub.6, (Cl.sub.3 P.dbd.N--(PCl.sub.2 .dbd.N).sub.d --PCl.sub.3).sup.+ (SbCl.sub.6).sup.- wherein d is 1 to 4, and compounds of the formula Y(PX.sub.2 .dbd.N).sub.a PX.sub.2 O) wherein X is chlorine, hydroxyl or an organosilicon radical bonded to phosphorous via oxygen, and a is 1 to 5. Also disclosed is a method for producing an organopolysiloxane by polymerisation reaction in the presence of a said catalyst composition, and use of .gamma.-butyrolactone as a carrier for a phosphonitrile catalyst in the preparation of an organopolysiloxane.Type: GrantFiled: December 18, 1998Date of Patent: April 11, 2000Assignee: Dow Corning, Ltd.Inventor: Jean Habimana
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Patent number: 6040412Abstract: This specification describes and claims a process for preparing chain-extended organopolysiloxanes. The process comprises the steps of: A) mixing organopolysiloxanes having at least one silicon-bonded hydroxyl group per molecule with a polymerization catalyst to form a mixture, B) allowing the mixture of step A to react so as to produce a reaction product comprising polymerized organopolysiloxanes of which some have at least one silicon-bonded hydroxyl group per molecule and C) allowing the silicon-bonded hydroxyl group containing organopolysiloxanes of the reaction product of step B to react with a nitrogen-containing silylating agent capable of chain-extending to produce a chain-extended organopolysiloxane. Preferably the silylating agent is a cyclosilazane. Organopolysiloxanes having terminal groups other than silicon-containing hydroxyl groups and which are capable of equilibrating with the mixture of step A and/or the reaction product of step B may also be introduced prior to step C.Type: GrantFiled: October 14, 1998Date of Patent: March 21, 2000Assignee: Dow Corning S.A.Inventors: Eric Damme, Jean-Marc Gilson, Patrick Leempoel, Fabrice Lebecq, Takao Takemasa
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Method for preparing polydiorganosiloxanes partially end-blocked with substituted silethylene groups
Patent number: 6037434Abstract: This specification describes and claims a method for producing polydiorganosiloxanes partially end-blocked with substituted silethylene groups. The method comprises the steps of: A) mixing a hydroxyl end-blocked polydiorganosiloxane with a silicon-containing compound having at least two silicon-bonded hydrogen atoms and a --Si(R').sub.3 end-blocked siloxane in the presence of an acidic polymerisation catalyst to form a mixture wherein each R' independently denotes a monovalent hydrocarbon or halohydrocarbon having 1 to 6 carbon atoms, B) conducting a reaction with the mixture of step A so as to produce a polydiorganosiloxane having at least one silicon-bonded hydrogen atom and at least one --Si (R').sub.3 group and C) adding a substituted alkenylsilane in the presence of a hydrosilylation catalyst to the reaction product obtained from step B to form a polydiorganosiloxane partially end-blocked with substituted silethylene groups.Type: GrantFiled: October 14, 1998Date of Patent: March 14, 2000Assignee: Dow Corning S. A.Inventors: Francois De Buyl, Eric Damme, Patrick Leempoel -
Patent number: 6031060Abstract: Terminally functionalized silicone polymers prepared using protected functionalized initiators and processes for preparing the same. The silicone polymers includes protected, functionalized silicone polymers, such as mono-functional, homotelechelic, heterotelechelic, macromonomer, and radial polymers. The protected functionalized polymers can be optionally deprotected to afford functionalized silicone polymers.Type: GrantFiled: May 20, 1998Date of Patent: February 29, 2000Assignee: FMC CorporationInventors: Robert James Letchford, James Anthony Schwindeman, Roderic Paul Quirk
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Patent number: 6022937Abstract: This invention relates to novel polyether polyols and to a process for their production. These polyether polyols are prepared by forming a polyhydroxyl group containing component in a first step by the reaction of a triazole-group containing compound with a compound that contains at least one functional group that is capable of reacting with the amine groups of the triazole group containing compound, and reacting the hydroxyl-group containing component with an alkylene oxide to form the polyether polyol of the invention. The present invention also relates to isocyanate-reactive compositions comprising these novel polyether polyols, and to a process for the production of a polyurethane comprising reacting a polyisocyanate with the novel polyether polyols of the present invention.Type: GrantFiled: November 24, 1998Date of Patent: February 8, 2000Assignee: Bayer CorporationInventors: Rick L. Adkins, Harold R. Parsons
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Patent number: 6020458Abstract: Fluorinated chemical precursors, methods of manufacture, polymer thin films with low dielectric constants, and integrated circuits comprising primarily of sp.sup.2 C-F and some hyperconjugated sp.sup.3 C-F bonds are disclosed in this invention. Precursors are disclosed for creating fluorinated silanes and siloxanes, and fluorinated hydrocarbon polymers. Thermal transport polymerization (TP), chemical vapor deposition (CVD), plasma enhanced CVD (PECVD), high density PECVD (HPCVD), photon assisted CVD (PACVD), and plasma-photon assisted (PPE) CVD and PPETP of these chemicals provides thin films with low dielectric constants and high thermal stabilities for use in the manufacture of integrated circuits.Type: GrantFiled: October 24, 1997Date of Patent: February 1, 2000Assignee: Quester Technology, Inc.Inventors: Chung J. Lee, Hui Wang, Giovanni Antonio Foggiato
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Patent number: 6015875Abstract: Acetals are produced from the reaction of aldehydes and alcohols, e.g. methylal by the reaction of methanol and formaldehyde, by the reaction in a reaction distillation column of the alcohol and aldehyde in the presence of a catalyst and the concurrent fractional distillation of the reaction mixture to separate the reaction products, water and acetal.Type: GrantFiled: August 11, 1998Date of Patent: January 18, 2000Assignee: Catalytic Distillation TechnologiesInventors: Lawrence A. Smith, Jr., Robert P. Arganbright
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Patent number: 6011079Abstract: A radiation curable release coating composition comprising, by weight,(a) 10-90% of an acrylate-functional silicone resin,(b) 10-90% of a vinylether monomer as reactive diluent therein, and(c) a photoinitiator.Type: GrantFiled: October 9, 1997Date of Patent: January 4, 2000Assignee: ISP Investments Inc.Inventors: James A. Dougherty, John Mc Kittrick
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Patent number: 6001928Abstract: A process for which making silicone-filler mixtures which comprises effecting the ring-opening polymerisation of a cyclosiloxane with a phosphazene base in the presence of a filler and of water, preferably from 0.5 mil to 10 mols of water per mol of phosphazene base. The filler is preferably selected from silica, alumina, titanium dioxide, carbon black and calcium carbonate, present in an amount of from 1 to 200 parts by weight per 100 parts by weight of cyclosiloxane. An agent or conditions which inhibit catalyst activity may initially be present (e.g. carbon dioxide or excess water), and polymerisation may be initiated by reducing the effect of the inhibiting agent or conditions (e.g. by heating). Silicon-elastomers produced by curing such silicone polymer-filler mixtures are also claimed.Type: GrantFiled: February 20, 1998Date of Patent: December 14, 1999Assignee: Dow Corning LimitedInventors: Brian Harkness, Richard Taylor
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Patent number: 6001888Abstract: The invention relates to activators for the depolymerization of polysiloxanes which are crosslinked, optionally contain fillers and/or are uncrosslinked, a method for the depolymerization of polysiloxanes which are crosslinked, optionally contain fillers and/or are uncrosslinked, and their use.Type: GrantFiled: April 22, 1997Date of Patent: December 14, 1999Assignee: GE Bayer Siliconesgmbh & Co.KGInventors: Robert Friebe, Wilhelm Weber, Karl-Heinz Sockel
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Patent number: 5994490Abstract: Compositions obtained by mixing oxygen-containing phosphazenes with tertiary alcohols at a temperature of from 0.degree. C. to 70.degree. C. and a pressure of from 900 to 1100 hPa are useful in processes for equilibrating and/or condensing organosilicon compounds.Type: GrantFiled: April 28, 1998Date of Patent: November 30, 1999Assignee: Wacker-Chemie GmbHInventors: Bernward Deubzer, Christian Herzig
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Patent number: 5994489Abstract: A method of hydrolyzing an alkoxysilane which comprises adding sufficient water to hydrolyze at least one alkoxy group, optionally, in the presence of acidic or basic catalysts.Type: GrantFiled: October 24, 1994Date of Patent: November 30, 1999Assignee: The Dow Chemical CompanyInventors: Robert F. Harris, Paul H. Townsend, III
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Patent number: 5990024Abstract: Novel methods for the preparation of polymers useful as precursors to ceramic materials by catalytic activation of Si--H bonds are disclosed. The methods comprise reacting, in the presence of a catalyst effective to activate Si--H bonds, Si--N bonds, or both, and/or a reactive solvent, a polymer in the form of a polysilane, polysilazane, polysiloxane or polycarbosilane with a reactant having the structural formula R--X--H, wherein X is NR' or O, R is H, organic, silyl, siloxyl, silazanyl or carbosilyl and may contain at least one additional X--H group, and R' is H, amino, silyl or silazanyl, to produce a modified polymer containing at least one Si--X bond. Polymers produced by these methods are also disclosed.Type: GrantFiled: June 16, 1997Date of Patent: November 23, 1999Assignee: SRI InternationalInventors: Yigal Blum, Gregory A. McDermott
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Patent number: 5990188Abstract: The present invention provides the discovery of an improved radiation curable coating composition comprising at least one acrylic monomer, a photoinitiator, and an ultraviolet light absorber selected from triazine or a dibenzoyl resorcinol derivative or a mixture thereof, the dibenzoyl resorcinol derivative having the formula ##STR1## where Ar and Ar' are independently substituted or unsubstituted monocyclic or polycyclic aryl groups and R' is H or a linear or branched alkyl chain having less than about 10 carbons bearing a --Si(OR.sup.2).sub.3, where R.sup.2 is a C.sub.1 to C.sub.6 alkyl group.Type: GrantFiled: August 15, 1996Date of Patent: November 23, 1999Assignee: General Electric CompanyInventors: Gautam Ambalal Patel, James Edward Pickett, Gregory Ronald Gillette, George Frederic Medford
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Patent number: 5977249Abstract: The present invention relates to compositions which crosslink to give elastomers, comprising;(A) a polyorganosiloxane (I) with at least two alkenyl groups per molecule and a metallic catalyst (IV) and(B) a polyorganosiloxane (II) with at least two silicon-bonded hydrogen atoms and an organic sulfur compound (III).Type: GrantFiled: July 14, 1997Date of Patent: November 2, 1999Assignee: Wacker-Chemie GmbHInventors: Ingomar Kovar, Johann Kammerer, Klaus-Michael Matejcek, Erhard Bosch, Walter Strassberger