Silicones Patents (Class 174/110S)
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Patent number: 4269894Abstract: Electric windings comprising an electric conductor and a plurality of cured insulating layers wrapping around the conductor, said cured insulating layers being obtained by bonding two or more insulating materials with a binder solution containing a mixture of a condensation polymerization type silicone resin containing hydroxyl groups in the molecule and an addition polymerization type silicone resin to form a composite insulating material, wrapping the composite insulating material around the conductor, impregnating the wrapped composite insulating material with an impregnating varnish of an epoxy-isocyanate resin and curing the impregnated composite insulating material, have excellent water resistance in addition to excellent thermal resistance, and mechanical properties.Type: GrantFiled: December 3, 1979Date of Patent: May 26, 1981Assignee: Hitachi, Ltd.Inventors: Masahiko Sakai, Shinichi Toyoda, Toshikazu Narahara, Takeshi Hakamada, Tomoya Tsunoda
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Patent number: 4263158Abstract: A dielectric composition comprising ethylene polymer and effective amounts, as a water treeing inhibitor, of at least one organo silane of the following formula: ##STR1## wherein R and R.sub.1 are independently selected from hydrogen, a hydrocarbyl group or substituted hydrocarbyl groups wherein the substituents are hydroxy, halogen, nitro, C.sub.1 to C.sub.8 alkyl, C.sub.1 to C.sub.8 alkoxy; or R and R.sub.1 together with the adjacent carbon atom form a ring of 3 to 7 carbon atoms; R.sub.2 is C.sub.1 to C.sub.8 alkyl, C.sub.1 to C.sub.18 alkoxy, C.sub.6 to C.sub.18 aryl, C.sub.1 to C.sub.8 acyloxy, C.sub.6 to C.sub.18 substituted or unsubstituted aryloxy; R.sub.3 and R.sub.4 are independently selected from C.sub.1 to C.sub.18 alkoxy, C.sub.6 to C.sub.18 substituted or unsubstituted aryloxy or C.sub.1 to C.sub.8 acyloxy; Y is C.sub.1 to C.sub.8 alkylene, C.sub.6 to C.sub.18 substituted or unsubstituted arylene or --CH.sub.2 CH.sub.2 NH(CH.sub.2).sub.3 --.Type: GrantFiled: September 18, 1979Date of Patent: April 21, 1981Assignee: Union Carbide CorporationInventors: Arnold C. Ashcraft, Robert J. Turbett
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Patent number: 4243542Abstract: What is disclosed is an electrical insulating material which consists of conventional electrical insulating materials which contain zinc oxide and a silicon compound wherein there is at least one hydrogen atom bound to a silicon atom. The improved compositions give minimal changes in their properties over wide temperature ranges.Type: GrantFiled: September 13, 1979Date of Patent: January 6, 1981Assignee: Toray Silicone Company, Ltd.Inventor: Katsutoshi Mine
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Patent number: 4237334Abstract: The present invention relates to a laminated insulating paper formed of cellulose paper or papers which is adhered to at least one side of cross-linked silicone grafted polyolefine film and to an oil-filled (OF) cable which insulated by the laminated insulating paper. The laminated insulating paper has outstanding peel strength as well as excellent non-solubility and anti-swelling properties in insulating oils.Type: GrantFiled: July 31, 1978Date of Patent: December 2, 1980Assignee: Showa Electric Wire & Cable Co., Ltd.Inventors: Takeshi Kojima, Sakae Kinoshita, Kenzo Takeuchi
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Patent number: 4223071Abstract: New high voltage insulating compositions are disclosed. The compositions comprise a polymer (e.g. a polysiloxane, epoxide resin or a polymer of one or more olefins or substituted olefins), an antitracking additive (e.g. an alumina hydrate), and certain phosphorus-containing compounds which have been found to provide the compositions with greatly improved resistance to erosion by high voltage stress. The phosphorus-containing compounds include phosphonates, phosphates, phosphites, phosphinates, phosphonites, phosphinites, phosphine oxides and sulfides, and phosphines, and salts and complexes thereof. The phosphorus-containing compound can react in situ with the polymer or other ingredients of the composition.Type: GrantFiled: January 13, 1978Date of Patent: September 16, 1980Assignee: Raychem CorporationInventors: Nicodemus E. Boyer, Travers K. Cammack, II, David D. Nyberg
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Patent number: 4219607Abstract: New high voltage insulating compositions are disclosed. The compositions comprise a polymer (e.g. a polysiloxane, epoxide resin or a polymer of one or more olefins or substituted olefins), an antitracking additive (e.g. an alumina hydrate), and certain phosphorus-containing compounds which have been found to provide the compositions with greatly improved resistance to erosion by high voltage stress. The phosphorus-containing compounds include phosphonates, phosphates, phosphites, phosphinates, phosphonites, phosphinites, phosphine oxides and sulfides, and phosphines, and salts and complexes thereof. The phosphorus-containing compound can react in situ with the polymer or other ingredients of the composition.Type: GrantFiled: January 13, 1978Date of Patent: August 26, 1980Assignee: Raychem CorporationInventors: Travers K. Cammack, II, David D. Nyberg
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Patent number: 4209566Abstract: The electrical properties of polymeric dielectric materials or compounds including polar additives are enhanced by a method of treating the polar additives with a reactive silicone liquid, and the improved polymeric insulation products of the method.Type: GrantFiled: January 26, 1979Date of Patent: June 24, 1980Assignee: General Electric CompanyInventors: Joseph E. Betts, Fred F. Holub
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Patent number: 4172805Abstract: Disclosed are benzyloxy substituted organosilicon compounds having a viscosity of from about 5 to about 500 cs at 25.degree. C. and useful as dielectric fluids. Disclosed also are improved electrical devices such as transformers and capacitors containing such compounds as dielectric fluids.Type: GrantFiled: February 27, 1978Date of Patent: October 30, 1979Assignee: Dow Corning CorporationInventor: Gary A. Vincent
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Patent number: 4172806Abstract: Disclosed are furfuryloxy substituted organosilicon compounds having a viscosity of from about 5 to about 500 cs at 25.degree. C. and useful as dielectric fluids. Disclosed also are improved electrical devices such as transformers and capacitors containing such compounds as dielectric fluids.Type: GrantFiled: February 27, 1978Date of Patent: October 30, 1979Assignee: Dow Corning CorporationInventor: Gary A. Vincent
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Patent number: 4153752Abstract: Polyolefin compounds containing nitrile polysiloxane fluid which have improved electrical properties, and electrical conductors insulated therewith.Type: GrantFiled: October 19, 1977Date of Patent: May 8, 1979Assignee: General Electric CompanyInventors: Burton T. MacKenzie, Jr., Maurice Prober, Stanley E. Kiersztyn
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Patent number: 4146491Abstract: Improved electrical devices such as transformers, and capacitors containing an improved dielectric fluid consisting essentially of a major amount of a liquid polyorganosiloxane and a minor amount of cumene, methyl cinnamate or carbon disulfide are disclosed.Type: GrantFiled: March 3, 1975Date of Patent: March 27, 1979Assignee: Dow Corning CorporationInventor: Gary A. Vincent
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Patent number: 4117195Abstract: In a method of making a cross-linked extruded product from polyethylene or other suitable polymer, the polymer is metered into a screw extrusion machine together with compounding ingredients comprising a hydrolysable unsaturated silane, a free-radical generator and a silanol condensation catalyst. The compounding ingredients are blended with the polymer in the barrel of the extruder and the mixture is heated sufficiently to effect grafting of silane groups to the polymer, the amount of free-radical generator being sufficiently low to limit direct free-radical cross-linking to a level that will not prevent extrusion of the material. The reaction mixture is extruded directly from the same extruder through an extrusion die to form an elongate shaped product and cross-linking is effected by subjecting the shaped product to the action of moisture.Type: GrantFiled: December 8, 1975Date of Patent: September 26, 1978Assignees: BICC Limited, Establissements Maillefer SAInventors: Peter Swarbrick, William John Green, Charles Maillefer
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Patent number: 4106961Abstract: A method of rendering a cable having a core consisting of a plurality of conductors longitudinally watertight. A silicone rubber which vulcanizes upon exposure to moisture is used between the conductors either throughout the entire length or in blocks.Type: GrantFiled: September 2, 1976Date of Patent: August 15, 1978Assignee: N.K.F. Kabel B.V.Inventors: Frederik Hendrik Kreuger, Jacobus Petrus Ignatius Van Kesteren
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Patent number: 4024441Abstract: A control center characterized by vertical bus bars having electrically insulating covers thereon which covers are in surface-to-surface contact with all surfaces of the bus bars except for spaced areas where connection is made by conductors for load distributions. In addition, each pair of spaced bus bars are isolated from each other by interfitting portions of the covers which portions are coextensive with the bus bars so that resistance to tracking and arcing between the bus bars is maximized.Type: GrantFiled: September 11, 1975Date of Patent: May 17, 1977Assignee: Westinghouse Electric CorporationInventors: Forrest E. Coyle, John R. Wilson, Brij M. Bharteey
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Patent number: 4011168Abstract: A composition consisting essentially of a specific siloxane fluid and a specific type of filler is disclosed to be useful as an electrical coating particularly where arc track resistant characteristics are needed.Type: GrantFiled: May 6, 1974Date of Patent: March 8, 1977Assignee: Dow Corning CorporationInventor: John G. Uhlmann
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Patent number: 4008113Abstract: A stranded filament bundle is coated with a cross-linking plastic that contains carbon black followed by enveloping in a plastic that cross-links in the presence of moisture. The inner coating will cross-link either when the outer layer cross-links by water treatment; or by conduction of heat in the extruder for the outer layer; or by microwave heating.Type: GrantFiled: May 20, 1975Date of Patent: February 15, 1977Assignee: Kabel-und Metallwerke Gutehoffnungshutte AktiengesellschaftInventors: Fritz Glander, Hermann Uwe Voigt
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Patent number: 4000362Abstract: An electrical insulation coated metallic wire consisting of a releasing layer coated on a metallic wire and an insulating layer superposed on the releasing layer. The insulating layer is formed by coating and baking an insulating varnish on the releasing layer. The electrical insulation coated metallic wire is used as an insulated conductive wire or an insulated resistance wire, the former using an electric conductor as the metallic wire and the latter using an electric-resistive substance as the metallic wire.Type: GrantFiled: March 6, 1973Date of Patent: December 28, 1976Assignee: Sumitomo Electric Industries, Ltd.Inventors: Munetaka Kawaguchi, Hirohiko Nakabayashi
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Patent number: 3983265Abstract: Substrates, particularly electronic connections, are protected by coating the substrate with a curable organosilicon composition based on .alpha.-.omega.-dihydroxy diorganopolysiloxanes, methyl polysiloxanes, fillers, amino organosilicon cross linking agents and optionally alkyl silicates or polysilicates, which are vulcanizable at ambient temperature or above, are improved by using a methylpolysiloxane in which the ratio of the R(CH.sub.3).sub.2 SiO.sub.0.5 units (R=C.sub.1 --C.sub.3 alkyl or vinyl) to SiO.sub.2 units is 0.4:1 to 1.2:1 and which contains 0.5 - 3.5% by weight OH groups bonded to Si and by using an amino organosilicon compound which is an aminoorganosilane of the general formula (i) (R"O).sub.3.sub.-p R'.sub.p Si[(CH.sub.2).sub.n O].sub.m (CH.sub.2).sub.t NHQ in which R' represents an alkyl group with 1 to 4 carbon atoms, a vinyl group or a phenyl group, R" represents a methyl, ethyl or methoxyethyl radical, Q represents a hydrogen atom or the radical --(CH.sub.2).sub.2 NH.sub.Type: GrantFiled: May 14, 1975Date of Patent: September 28, 1976Assignee: Rhone-Poulenc S.A.Inventor: Michel Letoffe
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Patent number: 3936572Abstract: A curable composition, especially adaptable for use as insulation for wire and cable, comprising an ethylene-containing polymeric member, a curing agent, and a silicone fluid having a viscosity not greater than about 100 centistokes at 25.degree.C. A filler such as carbon black or a mineral filler may be incorporated into the system.Type: GrantFiled: November 30, 1973Date of Patent: February 3, 1976Assignee: General Electric CompanyInventors: Burton Thornley MacKenzie, Jr., Charles Frank Wallace, Jr.