Material Is A Metal-containing Material Patents (Class 528/14)
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Patent number: 4988741Abstract: UV curable controlled release compositions are provided. An epoxy silicone fluid and a cationically polymerizable styrene compound, such as vinyl anisole, which is substantially miscible with the epoxy silicone fluid, is used in combination with an effective amount of a photoactive aromatic onium salt.Type: GrantFiled: November 27, 1989Date of Patent: January 29, 1991Assignee: General Electric CompanyInventor: Judith Stein
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Patent number: 4980439Abstract: The method of the present invention provides for the manufacturing of an alkenyl group-containing organopolysiloxane using an alkali catalyst in the presence of oxygen and in the absence of carbon dioxide. The copolymer is characterized by a viscosity of at least 500 cst at 25.degree. C., can be efficiently manufactured and is free of gelation. In the method an organopolysiloxane represented by the average formula R.sup.1.sub.a SiO.sub.(4-a)/2 in which R.sup.1 is a monovalent hydrocarbon group free of aliphatic unsaturation and a 4-8 carbon atom alkenyl group-containing organopolysiloxane represented by the average formula R.sup.2.sub.b R.sup.3.sub.c SiO.sub.(4-b-c)/2 are copolymerized.Type: GrantFiled: September 26, 1989Date of Patent: December 25, 1990Assignee: Toray Silicone Company LimitedInventors: Shosaku Sasaki, Hiroshi Masaoka
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Patent number: 4978702Abstract: A coating composition is disclosed which includes(A) 15 to 65% by weight (calculated as SiO.sub.2) of colloidal silica,a partially hydrolyzed and partially co-condensed product of the following component (B) and component (C):(B) 10 to 80% by weight (calculated as R.sup.1 Si(OH).sub.3) of a trialkoxysilane of the formula: R.sup.1 Si(OR.sup.2).sub.3 wherein the group R.sup.1 is methyl or vinyl and the group R.sup.2 is alkyl having 1 to 4 carbon atoms,(C) 1 to 50% by weight (calculated as R.sup.3.sub.n Si(OH).sub.4-n) of an acetoxysilane of the formula: R.sup.3.sub.n Si(OCOCH.sub.3).sub.4-n wherein the group R.sup.3 is alkyl having 1 to 3 carbon atoms, vinyl, phenyl, or mercaptoalkyl having 1 to 3 carbon atoms, and n is an integer of 0 to 2, provided that the total amount of the component (B) wherein the group R.sup.1 is methyl and the component (C) wherein the group R.sup.Type: GrantFiled: August 26, 1988Date of Patent: December 18, 1990Assignee: Sumitomo Chemical Company, LimitedInventors: Masahiro Yuyama, Masahiko Moritani, Mikio Futagami
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Patent number: 4965333Abstract: A room temperature vulcanizable organopolysiloxane composition is provided, comprising (a) a diorganopolysiloxane blocked with a silanol, dialkoxy or trialkoxy radical at both ends of the molecular chain thereof, (b) a novel organic silicon compound of the general formula: ##STR1## wherein R.sup.1 is hydrogen or a monovalent hydrocarbon radical having 1 to 8 carbon atoms, ##STR2## m and l are independently equal to 0, 1 or 2, and n is an integer in the range of 2 to 8, and (c) a curing catalyst. The composition may further contain (d) an organoalkoxysilane.Type: GrantFiled: December 20, 1988Date of Patent: October 23, 1990Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yoshio Inouye, Takeo Inoue, Koji Yokoo
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Patent number: 4960811Abstract: Fluorosilicone heat cured rubber compositions are prepared using a chain modifier mixture comprising vinyl terminated polysiloxanes and silanol terminated siloxanes which allow vinyl-on-chain-ends functionality to easily crosslink unhindered by perfluoroalkyl groups.Type: GrantFiled: June 16, 1989Date of Patent: October 2, 1990Assignee: General Electric CompanyInventor: Edwin R. Evans
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Patent number: 4956206Abstract: An adhesive release composition containing specific amounts of an organopolysiloxane bearing oxyalkylene groups and alkenyl groups, an organohydrogenpolysiloxane, and a platinum-type catalyst is characterized by the formation, on various base surfaces, of a release surface having an excellent printability and a stable release force. For example, a roll of pressure sensitive adhesive tape of this invention can be easily unrolled, durably adhered to an article and clearly printed with ink on its adhesive-releasing surface which bears the release composition of this invention.Type: GrantFiled: February 15, 1989Date of Patent: September 11, 1990Assignee: Toray Silicone Company, Ltd.Inventors: Nobuo Kaiya, Shosaku Sasaki
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Patent number: 4954596Abstract: A process for manufacturing an organic silazane polymer which comprises: reacting ammonia with a mixture of organosilicic compounds (I) and (II) wherein R is a methyl group, an ethyl group, or a phenyl group, and R.sub.1 is a hydrogen atom or a vinyl group, and X is a chlorine or a bromine atom; then polymerizing the thus obtained silazane compound in the presence of an alkali catalyst. A process for manufacturing a ceramic fiber which comprises melting, spinning, and rendering the organic silazane polymer infusible and then baking the same is also disclosed, as are improved silazane polymers and ceramic articles made therefrom.Type: GrantFiled: December 12, 1988Date of Patent: September 4, 1990Assignee: Shin-Etsu Chemical Col, Ltd.Inventors: Yoshifumi Takeda, Minoru Takamizawa, Tsutomu Takeno
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Patent number: 4946880Abstract: Reactive stabilizer compounds, to be used in the stabilization of organic polymers, contain a sterically hindered, N-substituted piperidinic, morpholinic or pyrrolidinic group, and at least a hydrolysable silicic function.Such compounds give rise, by hydrolysis of the silicic function, to complex resinous structures endowed with stabilizing properties.The reactive stabilizer compounds can spontaneously hydrolyse inside the polymer, or they can be stably supported on a solid support, or they can be chemically linked to the polymeric chain to be stabilized.Type: GrantFiled: October 5, 1987Date of Patent: August 7, 1990Assignee: Enichem Synthesis S.p.A.Inventors: Silvestro Costanzi, Damiano Gussoni, Omero Zavattini, deceased, by Clara Pungiluppi, heir, by Renato Zavattini, heir, Luciano Pallini
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Patent number: 4942211Abstract: The invention relates to organopolysiloxane compositions which can be crosslinked to form elastomers with the elimination of alcohols and are stabilized by salts of the second main group or sub-group with branched-chain carboxylic acids having from 5 to 15 carbon atoms.Type: GrantFiled: January 6, 1989Date of Patent: July 17, 1990Assignee: Wacker-Chemie GmbHInventors: Oswin Sommer, Norman Dorsch, Erhard Bosch, Alfred Kurz
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Patent number: 4912180Abstract: This invention relates to a process for the preparation of polyarylene sulphides by melt condensation, in which the sulphide bridges of the polymer are formed by the splitting off of a compound which is volatile under the reaction conditions.Type: GrantFiled: November 3, 1988Date of Patent: March 27, 1990Assignee: Bayer AktiengesellschaftInventors: Ernst-Ulrich Dorf, Hans-Rudolph Dicke, Volker Eckhardt, Joachim Genz
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Patent number: 4906712Abstract: This invention relates to a process for the preparation of polyarylene sulphides by melt condensation, in which the sulphide bridges of the polymer are formed by the splitting off of a compound which is volatile under the reaction conditions.Type: GrantFiled: November 8, 1988Date of Patent: March 6, 1990Assignee: Bayer AktiengesellschaftInventors: Ernst-Ulrich Dorf, Hans-Rudolph Dicke, Wolfgang Russeler, Volker Eckhardt, Joachim Genz
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Patent number: 4897459Abstract: Sodium fluorosilanolate catalyst is disclosed which has improved effectiveness as a catalyst to produce fluorosilicone polymer and which at the same time improves fluorosilicone polymer purity.Type: GrantFiled: November 25, 1987Date of Patent: January 30, 1990Assignee: General Electric CompanyInventor: Edwin R. Evans
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Patent number: 4888405Abstract: The invention relates to a process for treating organocyclosiloxane-containing mixtures with condensation catalysts. The resultant mixtures can be reacted with silanes or siloxanes to form organopolysiloxanes containing functional groups.Type: GrantFiled: August 10, 1988Date of Patent: December 19, 1989Assignee: Wacker-Chemie GmbHInventors: Norbert Gamon, Christian Solbrig, Karl Braunsperger
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Patent number: 4882450Abstract: Polysilanes of the general formula (RSi).sub.n wherein R is an alkyl, aryl, alkaryl or aralkyl group having 4 to 18 carbon atoms and where n has a value of at least 8, are soluble in a liquid organic medium when R is a stearically hindered or large group. Compositions comprising the organic liquid medium and dissolved therein the polysilane are also described.Type: GrantFiled: December 3, 1987Date of Patent: November 21, 1989Assignee: Dow Corning LimitedInventor: Roberto Bortolin
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Patent number: 4871646Abstract: Disclosed are a polysilane containing a unit represented by the following formulas I, II, or III, and a photosensitive composition consisting of the polysilane.Type: GrantFiled: May 13, 1988Date of Patent: October 3, 1989Assignee: Kabushiki Kaisha ToshibaInventors: Shizu Hayase, Rumiko Horiguchi, Yasunobu Onishi, Toru Ushirogouchi
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Patent number: 4869854Abstract: A process for manufacturing an organic silazane polymer which comprises reacting ammonia with a mixture of at least one compound selected from the group consisting of organic silicon compounds of the following formulae (I) and (II) ##STR1## and at least one compound selected from the group consisting of organic silicon compounds of the following formula (III) ##STR2## in which R represents hydrogen, chlorine, bromine, methyl radical, ethyl radical, phenyl radical or vinyl radical, R.sub.1 represents hydrogen or methyl radical, R.sub.2 represents hydrogen, methyl radical, ethyl radical, phenyl radical or vinyl radical and X represents chlorine or bromine; to obtain an ammonolysis product. The ammonolysis product is polymerized in the presence of a basic catalyst capable of deprotonation to obtain an organic silazane polymer. The silazane polymer may be further melted, shaped and infusibilized. The thus infusibilized product is finally sintered to obtain a ceramic material.Type: GrantFiled: October 27, 1987Date of Patent: September 26, 1989Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yoshihumi Takeda, Minoru Takamizawa, Akira Hayashida
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Patent number: 4870035Abstract: A process for manufacturing an organic silazane polymer which comprises reacting ammonia with a mixture of methyldichlorosilane, methyltrichlorosilane and dimethyldichlorosilane to obtain an ammonolysis product. The ammonolysis product is polymerized in the presence of a basic catalyst capable of deprotonation to obtain an organic silazane polymer. The silazane polymer may be further melted, shaped and infusibilized. The thus infusibilized product is finally sintered to obtain a ceramic material.Type: GrantFiled: June 28, 1988Date of Patent: September 26, 1989Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Minoru Takamizawa, Mitsuo Umemura, Masato Kanari, Yoshihumi Takeda, Akira Hayashida
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Patent number: 4833183Abstract: Poly[3,3-bis(hydroxymethyl)oxetane] ("PBHMO") is prepared in high molecular weight (n.sub.inh to 5.2) by polymerizing the trimethylsilylether of 3,3-bis(hydroxymethyl)oxetane with i-Bu.sub.3 Al-0.7 H.sub.2 O cationic catalyst at low temperature, followed by hydrolysis. PBHMO is crystalline, high melting (about 314.degree. C.), highly insoluble and useful in the production of films and fibers. Poly[3-methyl-3-(hydromethyl)oxetane] ("PMHMO") and poly[3-ethyl-3-(hydroxymethyl)oxetane] ("PEHMO") are also prepared in high molecular weight (n.sub.inh up to 3.8) by the same procedures. Copolymers of BHMO, MHMO, and EHMO with each other or containing up to about 50% of other oxethanes, oxiranes and tetrahydrofurans; derivatives and alloys from these polymers and copolymers; and methods of preparing the polymers, copolymers, alloys and derivatives into useful films, fibers and articles is described.Type: GrantFiled: June 3, 1988Date of Patent: May 23, 1989Assignee: Arizona Board of RegentsInventor: Edwin J. Vandenberg
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Patent number: 4830925Abstract: A method for the cathodic protection of a metal object is disclosed. The object is coated with a resin-containing curable silicone composition which contains a minor portion of a triorganosiloxy endblocked diorganopolysiloxane. After the silicone composition is cured, the object is maintained at a negative potential relative to an electrically conductive environment by a current source means. The compositions of the present invention have been found to exhibit significant improvement with respect to cathodic disbondment relative to similar silicone compositions of the prior art.Type: GrantFiled: January 4, 1988Date of Patent: May 16, 1989Assignee: Dow Corning CorporationInventors: Terence J. Swihart, John D. Blizzard
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Patent number: 4826946Abstract: Multi-block copolymers of recurring structural units of polysiloxanes and recurring structural units of aliphatic polyesters, polyethers or polyetheresters with rubber properties, the individual polymeric blocks constituting rubber-type products with glass transition temperatures below practical usefulness and a process for their production.Type: GrantFiled: June 4, 1987Date of Patent: May 2, 1989Assignee: Bayer AktiengesellschaftInventors: Herbert Eichenauer, Christian Lindner, Karl-Heinz Ott, Peter Orth, Hartwig Hocker
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Patent number: 4814418Abstract: A fluorosilicone polymer comprising from 30 to 99.95 mol % of units of a cyclic trisiloxane of the formula (a) --R.sub.f CH.sub.2 CH.sub.2 (R.sup.1)SiO--.sub.3, from 0.05 to 10 mol % of units of a cyclic siloxane of the formula (b) --R.sup.2 R.sup.3 SiO--.sub.m, and from 0 to 69.95 mol % of units of a cyclic siloxane of the formula (c) --R.sup.4 R.sup.5 SiO--.sub.n, wherein each of R.sup.1, R.sup.3, R.sup.4 and R.sup.5 is a monovalent organic group, R.sub.f is a perfluoroalkyl group having from 4 to 6 carbon atoms, R.sup.2 is an alkenyl group, and each of m and n is an integer of from 3 to 6.Type: GrantFiled: August 7, 1987Date of Patent: March 21, 1989Assignee: Asahi Glass Company, Ltd.Inventors: Haruhisa Miyake, Seiji Shin-ya, Yutaka Furukawa
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Patent number: 4808685Abstract: A process for preparing polysilanes of the general formula (RSi).sub.n wherein each R denotes independently an alkyl, aryl, alkaryl or aralkyl group having from 1 to 18 carbon atoms and n is at least 8, comprises reacting at least one silane of the general formula RSiX.sub.3 wherein R is as defined above and X denotes a halogen atom with an alkali metal in an organic liquid medium in which the silane is soluble, preferably tetrahydrofuran.Type: GrantFiled: December 3, 1987Date of Patent: February 28, 1989Assignee: Dow Corning, Ltd.Inventor: Roberto Bortolin
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Patent number: 4797462Abstract: Organopolysiloxanes curable into elastomeric state, well adapted as sealing materials for a variety of substrates and useful, e.g., in the automotive industry, are comprised of a polyhydroxylated polysiloxane, a polyacyloxysilane crosslinking agent, and an effective amount of at least one calcium oxide, strontium oxide and/or barium oxide cure accelerator therefor. The subject compositions are stable for at least 10 minutes at ambient temperature and crosslink on heating and/or addition of an aqueous or liquid carboxylic acid promoter thereto.Type: GrantFiled: September 11, 1987Date of Patent: January 10, 1989Assignee: Rhone-Poulenc ChimieInventors: Michel Letoffe, Georges Barrandon
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Patent number: 4794155Abstract: A moiety with the formula:A-X-Ar.sup.1 -O-Ar.sup.2reacts in the presence of a catalyst with a moiety of the formula:B-Ar.sup.3 -O-Yto form a linkage of the formula:A-X-Ar.sup.1 -O-Ar.sup.3 -B+Ar.sup.2 -O-Ywherein Ar.sup.1, Ar.sup.2 and Ar.sup.3 are aromatic moieties, X is an activating group, Y is a hydrogen, a trihydrocarbylsilyl, a trihydrocarbyltin, or a carbonyl moiety, and the catalyst is a catalyst capable of abstracting the group Y from the second moiety. The reaction can be used to create a polyarylether polymer.Type: GrantFiled: August 26, 1987Date of Patent: December 27, 1988Assignee: The Dow Chemical CompanyInventors: Edmond P. Woo, Hendrik E. Tuinstra, Michael J. Mullins
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Patent number: 4792596Abstract: Organopolysiloxanes containing triorganosiloxy terminal units are obtained by a continuous process in which an organopolysiloxane mixture containing organo(poly)siloxanes having triorganosiloxy terminal units and cyclic organopolysiloxanes are introduced into a tube reactor that has been heated to at least 80.degree. C. and which contains a static catalyst bed. The organopolysiloxane composition containing triorganosiloxy terminal units, which exits from the tube reactor is different from the organo(poly)siloxanes containing triorganosiloxy terminal units which were introduced into the reactor. The contents of the reactor in the area between one-third and two-thirds of the distance between the point where the organopolysiloxanes are introduced into the tube reactor and the point where the organopolysiloxanes exit from the reactor, are maintained at a temperature which is at least 50.degree. C. below that which is immediately upstream from the outlet of the reactor.Type: GrantFiled: August 12, 1987Date of Patent: December 20, 1988Assignee: Wacker-Chemie GmbHInventors: Ralph Ottlinger, Willi Streckel
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Patent number: 4785041Abstract: Thixotropic, silica-filled coating compositions wherein the curable film-forming material is an organosiloxane copolymer resin include a liquid polydiorganosiloxane containing hydroxyl-terminated polyoxypropylene units as the flow control agent. The compositions are particularly useful as screen printable passivation coatings for semiconductor devices.Type: GrantFiled: December 31, 1987Date of Patent: November 15, 1988Assignee: Dow Corning CorporationInventors: Robert C. Antonen, Diane M. Rasch, David A. Sierawski, David J. Romenesko
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Patent number: 4783516Abstract: This invention is concerned with novel polysilanes containing olefinic groups which are prepared by reactions of halogen-containing organosilane monomers or mixtures thereof with sodium metal in an appropriate solvent or mixture of solvents. Such polysilane polymers are soluble and thermoplastic, and can be directly converted to silicon carbide compositions by pyrolysis at atmospheric pressure.Type: GrantFiled: November 22, 1983Date of Patent: November 8, 1988Assignee: Union Carbide CorporationInventors: Curtis L. Schilling, Jr., Bernard Kanner
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Patent number: 4781973Abstract: Organopolysiloxane resin blended with alkyl-alkoxypolysiloxane resin plus a condensation catalyst is found to have reduced soil retention. Optionally, there may be added perfluoroalkyl resin for improved oil and water repellency.Type: GrantFiled: October 22, 1987Date of Patent: November 1, 1988Assignee: General Electric CompanyInventor: Anthony A. Zotto
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Patent number: 4780519Abstract: During the polymerization of diorganocyclosiloxane, to produce a polymer for use in manufacturing silicone rubber, a small amount of --SiOH is formed. The amount of --SiOH present in the polymer can be controlled by controlling the water vapor pressure present in the reaction container during polymerization.Type: GrantFiled: December 7, 1987Date of Patent: October 25, 1988Assignee: Dow Corning CorporationInventors: John C. Saam, Leo F. Stebleton
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Patent number: 4777233Abstract: A method of producing acryloxy containing organopolysiloxanes by reacting an epoxy containing organopolysiloxane with an acrylic acid or methacrylic acid followed by a reaction with acryloyl chloride or methacryloyl chloride. The novel acryloxy or methacryloxy cyclohexyl containing organopolysiloxanes are useful as compositions which cure by radiation, such as ultraviolet or electron beam. The compositions containing the acryloxy or methacryloxy cyclohexyl containing organopolysiloxanes can also contain other ingredients which are useful in radiation curable compositions, such as photoinitiators in ultraviolet radiation curable compositions.Type: GrantFiled: November 25, 1987Date of Patent: October 11, 1988Assignee: Toray Silicone Co., Ltd.Inventors: Toshio Suzuki, Makoto Yoshitake
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Patent number: 4771118Abstract: A process for manufacturing an organic silazane polymer which comprises reacting ammonia with a mixture of methyldichlorosilane, methyltrichlorosilane and dimethyldichlorosilane to obtain an ammonolysis product. The ammonolysis product is polymerized in the presence of a basic catalyst capable of deprotonation to obtain an organic silazane polymer. The silazane polymer may be further melted, shaped and infusibilized. The thus infusibilized product is finally sintered to obtain a ceramic material.Type: GrantFiled: September 3, 1986Date of Patent: September 13, 1988Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Minoru Takamizawa, Mitsuo Umemura, Masato Kanari, Yoshihumi Takeda, Akira Hayashida
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Patent number: 4769417Abstract: The invention relates to new block copolymers consisting of recurring polysiloxane blocks and recurring conjugated diene homo-or copolymer blocks with particularly good rubber properties, in particular at low temperatures.Type: GrantFiled: May 12, 1987Date of Patent: September 6, 1988Assignee: Bayer AktiengesellschaftInventors: Herbert Eichenauer, Christian Lindner, Karl-Heinz Ott, Hartwig Hocker
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Patent number: 4767876Abstract: A method of forming preceramic polymers using an organosilicon polymer containing Si--H repeat units by reacting it with alkali metal amide or silylamide is disclosed. Preferably, the silylamide is a polymeric silylamide formed by reacting in solution anhydrous ammonia with a mixture of R.sup.1 SiHX.sub.2 (where R.sup.1 is a lower alkyl group having from 1 to about 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having from 3 to about 6 carbon atoms, a substituted or unsubstituted lower alkenyl group having from 2 to about 6 carbon atoms or a substituted or unsubstituted lower aryl group having from 6 to about 10 carbon atoms; and X is a halogen) and R.sup.2 SiX.sub.3 (where R.sup.Type: GrantFiled: October 7, 1986Date of Patent: August 30, 1988Assignee: Massachusetts Institute of TechnologyInventors: Dietmar Seyferth, Joanne M. Schwark, Yuan-Fu Yu
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Patent number: 4766192Abstract: Polydiorganosiloxane gum, of the type produced by the alkaline metal catalyzed polymerization of organocyclosiloxanes can be produced without hydroxyl content by mixing the gum with and acid or acid producing phosphoric component and a silylamide component, allowing the mixture to react until the hydroxyl groups are eliminated, then devolatilizing the gum. The hydroxyl content can be removed without causing any significant change in the molecular weight of the gum and producing a gum which is heat stable at temperatures such as 250.degree. C. without the addition of heat stabilizers.Type: GrantFiled: July 10, 1987Date of Patent: August 23, 1988Assignee: Dow Corning CorporationInventor: Nedeljko V. Gvozdic
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Patent number: 4766191Abstract: Polydiorganosiloxane gum, of the type produced by the alkaline metal catalyzed polymerization of organocyclosiloxanes can be reduced in hydroxyl content by mixing the gum with an acid or acid producing phosphoric component and a silylamine component, allowing the mixture to react until the hydroxyl groups are lowered to the desired extent, then devolatilizing the gum. The hydroxyl content can be lowered without causing any significant change in the molecular weight of the gum. The hydroxyl content can be lowered to essentially zero.Type: GrantFiled: July 10, 1987Date of Patent: August 23, 1988Assignee: Dow Corning CorporationInventors: Nedeljko V. Gvozdic, Terrence K. Hilty, John C. Saam
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Patent number: 4764576Abstract: The inventive silicon-based coating composition provides an antistatic surface-releasing coating layer on a plastic film without the need of any antistatic undercoating. The coating composition comprises, in addition to the conventional ingredients in similar coating compositions including a vinyl-containing organopolysiloxane, an organohydrogenpolysiloxane and a platinum catalyst, a salt, e.g. nitrate and perchlorate, of a metal of the Ist, IInd or VIIIth Group of the Periodic Table and a specific organopolysiloxane having at least one per molecule of alkanolic pendant groups of the formula HO(CH.sub.2 CH.sub.2 O).sub.n CH.sub.2 CH.sub.2 CH.sub.2 --, in which n is 1 to 9.Type: GrantFiled: August 25, 1987Date of Patent: August 16, 1988Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Masahiko Ogawa, Yasuaki Hara
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Patent number: 4758611Abstract: An acid scavenger additive for a one-component, acyloxy-functional RTV composition. The acid scavenger is selected from magnesium materials, zinc materials, and aluminum materials. The acid scavenger prevents a discoloration of the metallic substrate and a decrease in bonding properties of the RTV composition to the substrate on which it is applied.Type: GrantFiled: January 12, 1987Date of Patent: July 19, 1988Assignee: General Electric CompanyInventor: Melvin D. Beers
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Patent number: 4756787Abstract: A co-curable composition, having utility as a first part of a two-part cationically curable composition and containing a latent curing component which is reactive with a latent curing component in a second part of the two-part composition to form curingly effective cations for the two-part composition, such co-curable composition comprising: (i) a cationically polymerizable material, and (ii) a dioxane-complexed metal salt of a non-nucleophilic anion. Also disclosed is a two-part composition curable by contact of respective parts with one another, comprising first and second parts of the aforementioned types. A preferred class of cation species comprises carbenium ions derived from reaction of an organic halide compound, as the first component, with a metal salt of a non-nucleophilic anion such as SbCl.sub.6.sup.-, SbCl.sub.3.sup.-, SbF.sub.6.sup.-, AsF.sub.6.sup.-, SnCl.sub.5.sup.-, PF.sub.6.sup.-, BF.sub.4.sup.-, CF.sub.3 SO.sub.3.sup.-, and ClO.sub.4.sup.-, as the second component.Type: GrantFiled: November 6, 1987Date of Patent: July 12, 1988Assignee: Loctite CorporationInventors: Kieran F. Drain, David J. Dunn
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Patent number: 4755579Abstract: Organopolysiloxane compositions comprising a polyhydroxylated polysiloxane and a polyacyloxysilane, whether in single- or two-component form, rapidly cure into elastomeric state (and are thus useful, e.g., as sealing materials) in the presence of a 2-carboxycarboxamide cure autoaccelerator.Type: GrantFiled: June 16, 1987Date of Patent: July 5, 1988Assignee: Rhone-Poulenc Specialites ChimiquesInventor: Michel Letoffe
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Patent number: 4745169Abstract: There are provided an alkali-soluble siloxane polymer, an alkali-soluble silmethylene polymer, and an alkali-soluble polyorganosilsesquioxane polymer. They are useful as a photoresist for the fabrication of semiconductor devices. They are suitable for dry etching because of their superior resistance to oxygen plasmas.Type: GrantFiled: May 5, 1986Date of Patent: May 17, 1988Assignee: Hitachi, Ltd.Inventors: Hisashi Sugiyama, Kazuo Nate, Takashi Inoue, Akiko Mizushima
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Patent number: 4742092Abstract: The curable organopolysiloxane composition of the invention is formulated with two kinds of crosslinking agents including an organosilane compound having 2 or 3 isopropenyloxy groups in a molecule and an organopolysiloxane having at least 2 mercapto groups in a molecule added to the base ingredient of a hydroxy-terminated diorganopolysiloxane together with a curing catalyst and a photosensitizer. The composition has two-way curability by the condensation reaction in the presence of atmospheric moisture between the silanolic hydroxy groups and the isopropenyloxy groups and by the ultraviolet-induced addition reaction between the isopropenyloxy groups and the mercapto groups to exhibit very reliable curing behavior giving a cured rubbery elastomer having excellent properties.Type: GrantFiled: October 14, 1986Date of Patent: May 3, 1988Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yoshio Inoue, Masatoshi Arai
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Patent number: 4739026Abstract: A continuous method for altering the molecular weight of organosilicon compositions containing Si-bonded oxygen in the presence of a catalyst and preferably under decreased pressure, in which a cylindrical reactor is employed have a ratio of length to inside diameter of between 1:1 and 50:1. A reactive mixture is stirred in the cylindrical reactor by a stirring apparatus having one or more stirring blades, so that the mixture is subjected to a maximum centrifugal acceleration b.sub.max of at least 70 m.s.sup.-2 and more preferably at least 165 m.s.sup.-2.Type: GrantFiled: May 19, 1986Date of Patent: April 19, 1988Assignee: Wacker-Chemie GmbHInventors: Manfred Riederer, Martin Piehler
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Patent number: 4737562Abstract: Polyorganosiloxane compositions yielding cured elastomers exhibiting cohesive bonding to inorganic substrates contain as the adhesion promoter the combination of (1) a 1,2- bis(trialkoxysilyl)ethane of the general formula (RO).sub.3 SiCH.sub.2 CH.sub.2 Si(OR).sub.3 where R represents an alkyl or haloalkyl radical containing from 1 to 8 carbon atoms, (2) an organosilicon compound containing at least one hydroxyl group or a hydrolyzable precursor thereof and at least one group that reacts at ambient temperature with the alkoxy groups of the silylethane or with the curable polyorganosiloxane composition, and (3) a catalyst for the reaction of the adhesion promoter ingredients.Preferred compositions are cured at room temperature by a platinum catalyzed hydrosilation reaction and are applied to metallic substrates that have not been cleaned or otherwise treated prior to application of the composition.Type: GrantFiled: October 15, 1986Date of Patent: April 12, 1988Assignee: Dow Corning CorporationInventors: Manoj K. Chaudhury, John H. Gaul
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Patent number: 4737561Abstract: A process for producing room temperature-vulcanizable silicone compositions which comprises mixing, in a first step, crosslinkable diorgano(poly)siloxanes, filler(s) and either catalyst(s) or crosslinking agent(s) and a part or all of the optional additives to be used in a continuusly operating closed mixer, and in a second step, metering the crosslinking agents and/or catalyst(s) not added in the first step and the remainder of the optional additivies to be used into the mixture thus obtained in an oscillating pilgrim-step kneader where the mixture is homogenized and degassed.Type: GrantFiled: December 31, 1986Date of Patent: April 12, 1988Assignee: Wacker-Chemie GmbHInventors: Fridolin Stary, Peter Kremer
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Patent number: 4736048Abstract: Pressure sensitive adhesives can be protected with a releasable liner having a cured fluoroalkyl silicone coating which contains as little as two percent fluoroalkyl-substituted siloxane units. In a preferred embodiment of this invention silicone pressure sensitive adhesives can be solvent-cast, and even cured, directly onto the release surface of the liner and can be removed from the protective liner with a force of no more than 400 grams per inch. The fluoroalkyl silicone copolymers of this invention are prepared by a process which involves the preparation of a cohydrolyzate of fluoroalkyl-containing and fluoroalkyl-free siloxane units, followed by further polymerization of the cohydrolyzate with other siloxane units.Type: GrantFiled: June 4, 1986Date of Patent: April 5, 1988Assignee: Dow Corning CorporationInventors: Paul L. Brown, David L. Stickles
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Patent number: 4731294Abstract: Methylphenylsiloxane coating compositions comprising silica fillers and aluminum particulates, e.g., matte paints, are well adopted for the provision of hard nonadhesive finishes, e.g., on kitchen utensils.Type: GrantFiled: May 5, 1986Date of Patent: March 15, 1988Assignee: Rhone-Poulenc Specialites ChimiquesInventors: Jean-Marie Pouchol, Louis Gros
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Patent number: 4720532Abstract: A method for preparing preceramic polymers is disclosed. This method includes the steps of(1) reacting in solution anhydrous ammonia with a mixture of R.sup.1 SiHX.sub.2 (where R.sup.1 is a lower alkyl group having from 1 to about 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having from 3 to about 6 carbon atoms, a substituted or unsubstituted lower alkenyl group having from 2 to about 6 carbon atoms, or a substituted or unsubstituted lower aryl group having from 6 to about 10 carbon atoms, and X is a halogen) and RSiX.sub.Type: GrantFiled: August 22, 1986Date of Patent: January 19, 1988Assignee: Massachusetts Institute of TechnologyInventors: Dietmar Seyferth, Joanne M. Schwark
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Patent number: 4715999Abstract: Optical blanks, for example spectacle lenses, are produced by hot-blank pressing or injection molding of polyorganoheterosiloxanes which are obtainable by hydrolytic polycondensation of at least one titanium-, zirconium-or tin-compound, at least one organofunctional silane and, where applicable, at least one inorganic oxide component. For control of the optical characteristics and working properties, polyorganoheterosiloxanes which have a polymerizable organic radical may be modified by additional polymerization with other copolymerizable condensates or monomers.Type: GrantFiled: November 8, 1985Date of Patent: December 29, 1987Assignee: Schott GlaswerkeInventors: Helmut Dislich, Nanning J. Arfsten, Helmut Schmidt, Gottfried Philipp, Gerhard Tuenker
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Patent number: 4710558Abstract: A process for stabilizing organopolysiloxanes containing alkaline compounds such as alkali metal hydroxides, alkali metal silanolates, alkali metal siloxanolates, or a mixture of at least two such compounds, which comprises neutralizing the alkaline compound present in the organopolysiloxanes with a neutralizing agent selected from a compound containing carbon, hydrogen, and oxygen atoms, and optionally at least one halogen atom, in which the compound has 2, 3 or 4 hydrocarbon groups bonded to the same carbon atom via oxygen, or an acylacetic acid ester. The resultant organopolysiloxanes are stabilized against viscosity changes caused by the alkaline compounds.Type: GrantFiled: August 1, 1986Date of Patent: December 1, 1987Assignee: Wacker Chemie GmbHInventors: Reinhard Jira, Ralph Ottlinger
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Patent number: 4698407Abstract: Disclosed is a one-pack curing type composition having an excellent storage stability and rapid curing property after application. The composition comprises a polymer having in the molecule at least two structures represented by the formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 independently represent a group selected from an alkyl group having 1 to 6 carbon atoms, a phenyl group and a chloromethyl group, and an oxidizing agent.Type: GrantFiled: June 9, 1986Date of Patent: October 6, 1987Assignee: Toray Thiokol Company LimitedInventors: Masashi Nakagima, Hiroshi Kojima, Tatsuro Matsui, Noriaki Dokoshi