Silicones Patents (Class 174/110S)
  • Patent number: 6120897
    Abstract: An article of manufacture comprising (i) a plurality of electrical conductors, each surrounded by one or more layers of a composition comprising (a) one or more polyolefins and, bonded thereto or blended therewith, (b) a linear or cyclic organopolysiloxane containing one or more functionalized hindered amine moieties; and (ii) hydrocarbon cable filler grease within the interstices between said surrounded conductors.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: September 19, 2000
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Geoffrey David Brown, Michael John Keogh, Sari Beth Samuels, Jeffrey Morris Cogen
  • Patent number: 6015629
    Abstract: A two-part system for electrical stress control includes a non-tacky conformable stress control material that is positioned at the shield cut edge of a prepared power cable and a stress control tube over the non-tacky conformable stress control material. A second region of conformable stress control material is positioned adjacent the cut end of the insulation.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: January 18, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Thomas J. D. Heyer, Robert A. Wandmacher, Lawrence C. Chor, John T. Larson
  • Patent number: 5989702
    Abstract: A sandwich type insulation for electrical machinery comprising a laminate of a polymeric material such as polyimide which contains particles of an inorganic corona resistant material, said polymeric material being bonded to mica paper consisting of mica, wherein said mica paper may be impregnated with polymeric resin containing particles of inorganic corona resistant material. The resultant insulation may be used as a tape or wrapper.
    Type: Grant
    Filed: August 7, 1996
    Date of Patent: November 23, 1999
    Assignee: General Electric Canada Inc.
    Inventors: Robert Edward Draper, G. Paul Jones, Robert H. Rehder, Michael Stutt
  • Patent number: 5904978
    Abstract: An electrically conductive composite article is provided having a polytetrafluoroethylene fibril matrix and a predetermined volume. The electrically conductive composite article comprises electrically conductive particles, and electrically nonconductive, energy expanded hollow polymeric particles. The volume percent of the electrically conductive particles is at least 20 volume percent. The electrically conductive composite article is continuously electrically conductive throughout its entire structure. Accordingly, electric current freely flows through the composite article due to the low resistivity of the article. The electrically conductive composite article may additionally include an elastomer material disposed within the article in a discontinuous fashion.
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: May 18, 1999
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: James R. Hanrahan, Michael P. Kienzle, Mark S. Spencer
  • Patent number: 5562985
    Abstract: The invention relates to coating composition, coated articles of manufacture, and to the formation of the coated articles. The coating is an energy-beam set resin containing fluid containing heat-expandable, fluid-encapsulating hollow spheres in the resin. The coating of a substrate, such as a communication line material, is accomplished by coating the material with a resin mixture containing expandable spheres and then exposing the coated material to an energy-beam source for a period of time to cure the resin and expand the spheres. The coating is applied to at least one filament of a communication line material. Such filaments can be gathered into bundles which are first extrusion coated with a thermoplastic polymer before being coated with the resin mixture. The composition of the resin material can be varied by changing the volume percent of the hollow spheres present in the resin mixture.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: October 8, 1996
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Hiroaki Sano, Tatsuya Kakuta, Toru Yamanishi
  • Patent number: 5519172
    Abstract: The present invention is an improved jacketing material for all forms of electro-magnetic energy conductors. The jacket material of the present invention comprises a silicone material that is imbibed into a porous polymer, such as expanded polytetrafluoroethylene, to produce a flexible and durable composite. When applied as a cable jacket, the composite material of the present invention produces dramatic improvement over the use of silicone alone, especially in the areas of load sharing, resistance to fatigue from repeated flexure, and resistance to harsh environmental conditions. The ability of the material of the present invention to withstand repeated autoclave cycles without compromise makes it particularly suitable for cable jacketing in bio-medical applications.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: May 21, 1996
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Mark S. Spencer, Edward Rubin
  • Patent number: 5510153
    Abstract: Glass particles (14) are mixed within an uncured silicone resin (13). The fluid uncured resin is placed in a portion of a terminal block (11) and cured to form a gel (13') by subjecting it to microwaves in a microwave oven (22). Conductors (25, 26) to be interconnected are next inserted into the cured silicone gel and interconnected. The cured gel containing the glass particles thereafter constitutes a dependable insulator for the conductors, particularly the portions of the conductors that are interconnected.
    Type: Grant
    Filed: August 4, 1993
    Date of Patent: April 23, 1996
    Assignee: AT&T IPM Corporation
    Inventors: Peter F. Lilienthal, II, Ivan Pawlenko, Ching-Ping Wong
  • Patent number: 5441813
    Abstract: The invention relates to coating composition, coated articles of manufacture, and to the formation of the coated articles. The coating is an energy-beam set resin containing fluid containing heat- expandable, fluid-encapsulating hollow spheres in the resin. The coating of a substrate, such as a communication line material, is accomplished by coating the material with a resin mixture containing expandable spheres and then exposing the coated material to an energy-beam source for a period of time to cure the resin and expand the spheres. The coating is applied to at least one filament of a communication line material. Such filaments can be gathered into bundles which are first extrusion coated with a thermoplastic polymer before being coated with the resin mixture. The composition of the resin material can be varied by changing the volume percent of the hollow spheres present in the resin mixture.
    Type: Grant
    Filed: August 16, 1994
    Date of Patent: August 15, 1995
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Hiroaki Sano, Tatsuya Kakuta, Toru Yamanishi
  • Patent number: 5368935
    Abstract: Disclosed herein are a heat resistant insulated wire which is not decomposed but maintains insulativity under a high temperature with excellent adhesion of a coating film, and a method of preparing the same. The heat resistant insulated wire includes a base material consisting of an electrical conductor, and an insulating layer provided on its surface. The insulating layer is obtained by heating a second polymer, in which main chains expressed in a chemical formula--[Si(R.sub.1).sub.2 --N(R.sub.2)].sub.n --are cross-linked with each other by chloroborazine through side chains containing trialkylsilyl radicals at a temperature of at least about 300.degree. C. and not more than 500.degree. C.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: November 29, 1994
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Shinji Inazawa, Kouichi Yamada
  • Patent number: 5330809
    Abstract: An electrical cable having a wire bundle core surrounded by a thermal protection sleeve, the thermal protection sleeve consisting of a sandwich structure of outer acrylic adhesive layer and a silicone foam core.
    Type: Grant
    Filed: December 12, 1990
    Date of Patent: July 19, 1994
    Assignee: The Boeing Company
    Inventor: Mickey A. Williamson
  • Patent number: 5326604
    Abstract: An electrical cable having a wire bundle core surrounded by a thermal and chafe protection sleeve, the thermal and chafe protection sleeve consisting of a sandwich structure having an additional outer layer of fiberglass lacing tape and a fluorosilicone fuel resistant coating.
    Type: Grant
    Filed: February 10, 1993
    Date of Patent: July 5, 1994
    Assignee: The Boeing Company
    Inventor: Mickey A. Williamson
  • Patent number: 5247136
    Abstract: An apparatus for manufacturing a resin cord with enclosed fine metal wires is provided as a unit, in which fine metal wires are supplied from a nipple to a die while extruding a resin around the nipple into the die for burying the fine metal wires in the resin in the length direction of a hollow or solid resin cord, the nipple having a central space in its section perpendicular to the extruding direction and also fine metal wire supply grooves joining the central space, a nozzle made of a wear-resistant material being provided in the central space. The outer diameter of the cord is 0.3 to 2.0 mm, the thickness of the resin part is 0.1 mm or above, the diameter of fine metal wires is 0.03 to 0.2 mm, and the thickness of the resin part is greater than the diameter of the fine metal wires.
    Type: Grant
    Filed: August 26, 1991
    Date of Patent: September 21, 1993
    Assignee: Fuji Polymer Industries Co., Ltd.
    Inventors: Kazuyuki Mitsuyasu, Tatsuji Hirano
  • Patent number: 5202186
    Abstract: An electrical cable having a wire bundle core surrounded by a thermal protection sleeve, the thermal protection sleeve consisting of a sandwich structure of a laminate of silicone foam provided on both sides with an acrylic adhered layer of fiber glass, the sandwich structure having an additional outer layer of acrylic adhesive adhered silicone release liner material or fiber glass lacing tape.
    Type: Grant
    Filed: August 5, 1991
    Date of Patent: April 13, 1993
    Assignee: The Boeing Company
    Inventor: Mickey A. Williamson
  • Patent number: 5082995
    Abstract: An electrical cable has one or more electrical conductors (1A, 1B, 1C) enveloped in electrically insulating material (2A, 2B, 2C, 3, 5, 13). At least some of the electrically insulating material is formed of a composition having an elastomer, an oxide of iron and silicon carbide.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: January 21, 1992
    Assignee: Vickers Shipbuilding & Engineering Limited
    Inventors: John R. Paterson, Leonard Warren
  • Patent number: 5008495
    Abstract: An electric cable is disclosed that has improved burn resistance characteristics. The improved electric cable consists of an insulation portion that has a glass fiber yarn wrapped around the conductor. The glass fiber yarn is impregnated at an outer periphery by a first silicone mixture. A second silicone mixture is coated about the outer periphery of the glass fiber yarn. In an alternative embodiment, a silicone tape replaces the Fiberglas.TM. yarn. The improved insulation for electric cable is envisioned for use with both single strand and multi-strand wires.
    Type: Grant
    Filed: February 12, 1990
    Date of Patent: April 16, 1991
    Assignee: Lestox, Inc.
    Inventor: Donald Mudgett
  • Patent number: 4969706
    Abstract: A plenum cable (20) includes a core (22) comprising at least one transmission medium such as a metallic conductor. The metallic conductor is insulated with a layer (27) of a plastic composition of material which includes a non-halogenated constituent such as, for example, a polyetherimide. Covering the insulated metallic conductor is a jacket (39) comprising a halogenated material such as a fluoropolymer. The cable exhibits excellent flame retardant properties as well as acceptable levels of corrosion and toxicity.
    Type: Grant
    Filed: April 25, 1989
    Date of Patent: November 13, 1990
    Assignee: AT&T Bell Laboratories
    Inventors: Tommy G. Hardin, Behrooz A. Khorramian
  • Patent number: 4966638
    Abstract: An improved silicone mixture is disclosed that is abrasion resistant and more durable than prior silicone compounds. A silicone rubber is combined with clay and, optionally, a quantity of powdered alumina-trihydrate may be added to provide fire resistance. The silicone rubber may be either a liquid silicone rubber, or, in a second embodiment a vulcanizing silicone rubber. The final mixture is arrived at by distinct methods depending on the type of silicone rubber that is utilized. A method of disposing mixture upon an electric cable to create an insulation outer coating for the electric cable is also disclosed.
    Type: Grant
    Filed: June 13, 1989
    Date of Patent: October 30, 1990
    Assignee: Lestox, Inc.
    Inventor: Donald Mudgett
  • Patent number: 4937142
    Abstract: A covered lead wire for vehicles, comprising a cover comprising a composition containing;(A) 100 parts by weight of polyvinyl chloride resin;(B) 0.1 part to 10 parts by weight of polyorganosiloxane;(C) at least 30 parts by weight of a plasticizer; and(D) at least 1 part by weight of a stabilizer.The present covered lead wire can achieve good abrasion resistance and scrape resistance even with reduced thickness of the cover, and can meet the recent demands for the weight-saving and improvement of wiring workability.
    Type: Grant
    Filed: April 20, 1989
    Date of Patent: June 26, 1990
    Assignee: Shin Etsu Chemical Co., Ltd.
    Inventors: Yoshimi Ogushi, Osamu Matsumoto
  • Patent number: 4935302
    Abstract: An electrical conductor is provided with an electrical insulation (11) surrounding the conductor (10) and a surrounding protective layer (12) which protects the insulation against degradation caused by corona. The protective layer consists of an organic polymer containing at least 10 percent by volume of a powdered filler in the form of chromium oxide, iron oxide, or a mixture of chromium oxide and iron oxide. The filler preferably has an intrinsic resistivity of 10.sup.4 -10.sup.8 ohm m. The thickness of the protective layer is preferably smaller than the thickness of the underlying insulation (11) and its resistivity preferably exceeds 10.sup.10 ohm m. The conductor is used, among other things, in windings and coils for electrical machines.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: June 19, 1990
    Assignee: Asea Brown Boveri AB
    Inventors: Arne Hjortsberg, Goran Holmstrom, Lennart Johansson, Thommy Karlsson
  • Patent number: 4910361
    Abstract: An electric cable is disclosed that has improved burn resistance characteristics. The improved electric cable consists of a insulation portion that has a glass fiber yarn wrapped around the conductor. The yarn is impregnated at an outer periphery by a first silicone compound. A second silicone compound is coated about the outer periphery of the glass fiber yarn. In an alternative embodiment, a silicone tape replaces the glass fiber yarn. The improved insulation for electric cable is envisioned for use with both single strand and multi-strand wires.
    Type: Grant
    Filed: March 29, 1989
    Date of Patent: March 20, 1990
    Assignee: Lestox Inc.
    Inventor: Donald Mudgett
  • Patent number: 4906308
    Abstract: An improved process and apparatus for making electric cable is disclosed that will result in electric cable with improved burn resistant characteristics. The improved process and apparatus consists of a first yarn wrapping portion, an impregnating section, a drying section, a coating section, a second drying section, and a coiling section for returning the wire to a reel. This process wraps a glass fiber yarn about an electric wire and then impregnates this yarn with a silicone mixture. The impregnated yarn is then dried and sent to a second coating chamber where an additional silicone mixture is coated about the outer periphery of the yarn. The wire goes into a second drying section and then goes on to the coiling section. In a second embodiment of this invention silicone tape is used to wrap around the electric wire than than the glass fiber yarn.
    Type: Grant
    Filed: March 29, 1989
    Date of Patent: March 6, 1990
    Assignee: Lestox, Inc.
    Inventor: Donald Mudgett
  • Patent number: 4840983
    Abstract: An organosilane of the general formula ##STR1## where R denotes a hydrogen or alkyl radical, n is 2 to 5, Ph denotes an aryl radical, and R' denotes an alkyl radical, and the hydrolysis product, a disiloxane, of said organosilanes with water, where said compounds are useful as anit-treeing additives to polyolefin.
    Type: Grant
    Filed: May 23, 1986
    Date of Patent: June 20, 1989
    Assignee: Dow Corning Corporation
    Inventor: Gary A. Vincent
  • Patent number: 4830688
    Abstract: A moisture resistant splice assembly for communications and electrical cables is provided. The assembly employs a moisture activatable encapsulant.
    Type: Grant
    Filed: November 19, 1987
    Date of Patent: May 16, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: John S. Staral
  • Patent number: 4810577
    Abstract: A heat and oil-resistant electric insulated wire comprises a conductor coated with an insulating layer which is formed of a vinylidene fluoride-based fluororubber and a silicone rubber added thereto. The amount of silicone rubber added is in a range of 2 to 30 parts by weight, preferably 5 to 20 parts by weight per 100 parts of said fluororubber, said fluororubber being a vinylidene fluoride-propylene hexafluoride copolymer and/or a vinylidene fluoride-propylene hexafluoride-ethylene tetrafluoride terpolymer.
    Type: Grant
    Filed: January 12, 1987
    Date of Patent: March 7, 1989
    Inventor: Norio Ikegaya
  • Patent number: 4769287
    Abstract: An electric cable having at least one conductor and at least one covering therefor obtained from the polymerization of a silanic monomer of a compound comprising a non-cross-linked base-polymer and a polymerizable silanic monomer present prior to polymerization in a quantity not less than 5 parts by weight with respect to 100 parts by weight of the base-polymer. Thepolymerization of the silanic monomer units forms a polymeric mesh which is closely interconnected and thoroughly compenetrated into the non-cross-linked base-polymer. In one embodiment the polymeric mesh may be grafted onto the base-polymer through the addition of an organic peroxide. Thus, there is provided an electric cable for use as building wires wherein the conductor covering is not cross-linked but is heat resistant to temperatures above the deformation temperature of the base-polymer.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: September 6, 1988
    Assignee: Societa' Cavi Pirelli S.p.A.
    Inventors: Antonio Zaopo, Flavio Casiraghi, Alessandro Secco
  • Patent number: 4755020
    Abstract: An optical fiber cable unit in which an elongated optical fiber is telescoped into an outer jacket such that an annular space is defined between the fiber and the jacket. The space is filled with a polyorganosiloxane "grease" having extremely good thixotropic properties which cause the material to establish a gas-tight seal between the fiber and the jacket while allowing the fiber to float freely within the jacket to avoid elongation of the fiber when tension is applied to the cable.
    Type: Grant
    Filed: July 23, 1987
    Date of Patent: July 5, 1988
    Assignee: Andrew Corporation
    Inventors: Frank R. Willis, John D. Meyer
  • Patent number: 4693936
    Abstract: An improved thermally stable, lubricious magnet wire enamel is disclosed which is particularly suitable for use as an outermost insulating, lubricating layer on a magnet wire substrate. The enamel comprises the reaction product of a tri-basic acid anhydride, a diisocyanate and a polyfunctional organosiloxane. The coating has a coefficient of friction, after application to magnet wire, of less than 0.10. It is also substantially all polyfunctional organosiloxane reacted, i.e. substantially no polyfunctional organosiloxane is capable of being extracted from the cured coating with organic solvents.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: September 15, 1987
    Assignee: Essex Group, Inc.
    Inventors: Charles W. McGregor, Melody L. Sutto
  • Patent number: 4680427
    Abstract: A cast cable connection comprising cables having their conductors interconnected and surrounding the conductors a housing containing a cured filler resin therein, said housing comprising bound, flexible, ceramic particles.
    Type: Grant
    Filed: August 15, 1985
    Date of Patent: July 14, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Gunther John
  • Patent number: 4680229
    Abstract: Halogen-free, flame-resistant hydrocarbon polymer compounds comprising an organopolysiloxane gum, and a lead compound, and electrical conductors insulated therewith.
    Type: Grant
    Filed: July 22, 1985
    Date of Patent: July 14, 1987
    Assignee: General Electric Company
    Inventors: Joseph E. Betts, Fred F. Holub
  • Patent number: 4670494
    Abstract: A flame retardant low smoke PVC-based thermoplastic composition for use in wire insulation and cable jacketing is disclosed. The composition includes poly(vinyl chloride), chlorinated poly(vinyl chloride), molybdenum oxide, alumina trihydrate, and isodecyl diphenyl phosphate as its primary ingredients, and additionally includes at least one heat stabilizer, at least one antioxidant, at least one lubricant, and at least one plasticizer besides the isodecyl diphenyl phosphate. It may also include antimony oxide, fillers, and chlorinated paraffins. The composition has excellent flame retardancy and produces only a relatively small amount of light-colored smoke when burned.
    Type: Grant
    Filed: July 30, 1985
    Date of Patent: June 2, 1987
    Assignee: Gary Chemical Corp.
    Inventor: Nicholas J. Semenza, Jr.
  • Patent number: 4584431
    Abstract: A high voltage coaxial cable wherein a corona-free configuration is produced by applying a room temperature-curable silicone elastomeric material under pressure to the outer surface of the cable braid so that the material is forced between the voids of the braid and adheres to the primary insulation material at the insulation/braid interface.
    Type: Grant
    Filed: October 11, 1984
    Date of Patent: April 22, 1986
    Inventors: Robert J. Tippie, Anthony T. Nasuta, Jr.
  • Patent number: 4564562
    Abstract: An article of manufacture comprises an electronic device having a silicone resin encapsulant thereover, wherein the silicone resin is an oxime and water free formulation derived from curing a mixture consisting essentially of a heat curable silicone elastomer prepolymer and a dialkylaminoalkoxysilane. The mixture may also contain fillers and a small amount of curing catalyst and stabilizer.
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: January 14, 1986
    Assignee: AT&T Technologies, Inc.
    Inventor: Ching-Ping Wong
  • Patent number: 4562164
    Abstract: A ceramic-like high temperature insulation for electrical coils is provided by mixing a silicone resin, synthetic fluoro-mica and a devitrified mica glass, impregnating an electrical coil with such material, curing the material and then treating the material to an elevated temperature about 300.degree. C. The elevated temperature treatment may be effected either prior to or during use of the coil.
    Type: Grant
    Filed: January 23, 1985
    Date of Patent: December 31, 1985
    Assignee: Nikkiso Co. Ltd.
    Inventors: Haruo Miyazaki, Yasuaki Yamasaki, Tsutomu Oshiyama
  • Patent number: 4552818
    Abstract: An encapsulant for an electronic device comprises a silicone resin having a highly colored porphyrin compound doped therein.
    Type: Grant
    Filed: May 10, 1984
    Date of Patent: November 12, 1985
    Assignee: AT&T Technologies, Inc.
    Inventor: Ching-Ping Wong
  • Patent number: 4521549
    Abstract: Tracking is reduced in insulators comprising one or more polymers and an anti-tracking filler system comprising (a) a hydrate of alumina having a specific surface area of at least 2 m.sup.2 /g measured by the BET method, and (b) a compound selected from the group consisting of oxides, mixed oxides and mixtures of oxides wherein said compound contains at least one element selected from the group consisting of transition series elements, lanthanide series elements and nontransuranic actinide series elements.
    Type: Grant
    Filed: August 12, 1983
    Date of Patent: June 4, 1985
    Assignee: Raychem Corporation
    Inventor: Richard J. Penneck
  • Patent number: 4515992
    Abstract: An improved cable having a metallic inner conductor, a dielectric material surrounding the inner conductor and a metallic outer conductor or sheath comprises corrosion inhibiting adhesive disposed at the interface between at least one of the metallic conductors and the dielectric. The adhesive composition comprises a polyfunctional silane compound reacted with the metallic surface of the conductor and providing corrosion resistance thereto while also promoting bonding between the conductor and the dielectric.
    Type: Grant
    Filed: May 10, 1983
    Date of Patent: May 7, 1985
    Assignee: CommScope Company
    Inventor: Chakra V. Gupta
  • Patent number: 4497922
    Abstract: A composition of materials comprising a polyamide acid-silicone intermediate obtained by reacting (a) a diaminoamide compound of the formula: ##STR1## wherein Ar and Y are as defined in the specification, (b) a diaminosiloxane, (c) a diamine, and (d) an aromatic tetracarboxylic acid dianhydride can form a protective film used in a semiconductor device excellent in adhesive properties, heat resistance and preventing soft errors due to .alpha.-rays.
    Type: Grant
    Filed: June 6, 1983
    Date of Patent: February 5, 1985
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Hidetaka Sato, Shunichiro Uchimura, Isao Uchigasaki, Daisuke Makino
  • Patent number: 4476192
    Abstract: An enameled wire having resistance to overload which comprises an electric conductor and a baked wire enamel coat is disclosed. The wire enamel coat is applied to the conductor through a die from wire enamel comprising a silicone resin having incorporated therein 50 to 200 phr of particles of an inorganic tabular crystalline material that have a maximum average particle size not greater than 80.mu., an average not greater than 40.mu. and an average aspect ratio between 30 and 100 and which react with the silicone resin at elevated temperatures to become a ceramic and which have been surface-treated with a coupling agent, a surface active agent or a coating agent. The tabular crystals in the wire enamel coat are orientated parallel to the surface of the conductor. The enamel coat has good adhesion to the conductor and will not easily crack or peel off the conductor even when subjected to high temperatures and adverse physical stress.
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: October 9, 1984
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takeshi Imai, Naohiro Kako, Nobuyuki Asano, Shigeo Masuda, Morihiko Katsuda
  • Patent number: 4444948
    Abstract: A mixture of substances is fed to an extruder and, after being homogenized and liquefied, is extruded on an electric conductor or as a pipe. To meet electric cable specifications, the insulating material used is a polyolefin, such as polyethylene, cross-linking of which is brought about by the addition of a silane, a free-radical generator, and a silanol condensation catalyst. After extrusion, cross-linking takes place in the presence of moisture. To facilitate penetration of the moisture and accelerate cross-linking, an agent capable of reducing the rate of crystallization of the polymer, such as vinyl acetate, is used as a further additive.
    Type: Grant
    Filed: March 12, 1982
    Date of Patent: April 24, 1984
    Assignee: Maillefer, S.A.
    Inventors: Ulrich Hochstrasser, Eberhard Kertscher
  • Patent number: 4440974
    Abstract: An electromechanical cable capable of withstanding high pressures and temperatures of at least 200.degree. C., the cable comprising a core having a plurality of insulated conductors (3,5) covered with a conductive filler (7) which fills the voids between the conductors, the core being surrounded by a layer of conductive textile material (8) and by at least one layer of helically wound metal armor wire (9,10). The filler is a composite material comprising a silicone polymer with a semiconductor charge of carbon black.
    Type: Grant
    Filed: June 16, 1982
    Date of Patent: April 3, 1984
    Assignee: Les Cables de Lyon
    Inventor: Jacques Naudet
  • Patent number: 4431701
    Abstract: A silicone rubber covered electrical conductor is described which has good insulative resistance and is easily stripped for termination. The silicone rubber used as the insulation comprises an organopolysiloxane, a silica filler, zinc oxide or a zinc salt of a fatty acid, and orthochlorobenzoyl peroxide.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: February 14, 1984
    Assignee: Toray Silicone Company, Ltd.
    Inventors: Mitsuo Hamada, Sadami Yasuda
  • Patent number: 4431578
    Abstract: A particular dielectric fluid, having a composition with a specific gravity of at least 1.02 and consisting essentially of a silicone fluid and an additive, soluble in said silicone fluid, selected from the group consisting of trimethylsilyl treated (CH.sub.3).sub.3 SiO.sub.1/2 /SiO.sub.2 resin copolymer, dipropyleneglycoldibenzoate, dixylylethane, phenylxylylethane, and a mixture of [(CH.sub.3).sub.3 Si].sub.2 O treated silica and a silica aerogel, is employed to encapsulate and insulate an electrical cable splice. The same particular dielectric field composition is also used to fill an electrical cable's conductor interstices.
    Type: Grant
    Filed: November 27, 1981
    Date of Patent: February 14, 1984
    Assignee: Dow Corning Corporation
    Inventor: Eugene D. Groenhof
  • Patent number: 4431982
    Abstract: Compositions which cure to electrically conductive silicone elastomers containing greater than 2 percent by weight of phenyl radicals, are disclosed. The compositions comprise a mixture of polydiorganosiloxane and greater than 15 percent by weight of electrically conductive carbonaceous particles of less than 20 micrometers average diameter. Electrically conductive members of controlled resistivity are manufactured using these compositions. These electrically conductive members are useful as the core for improved automotive ignition cable. The ignition cable has a long useful life.
    Type: Grant
    Filed: June 12, 1981
    Date of Patent: February 14, 1984
    Assignee: Dow Corning Corporation
    Inventors: Carl M. Monroe, Randall P. Sweet
  • Patent number: 4431579
    Abstract: The anti-inflammability of dimethyl silicone oil for use in static electric apparatuses is improved by reacting the dimethyl silicone oil with a cerium chelate compound so as to bind thereto a predetermined amount of the cerium chelate compound. This binding suppresses the generation of the cyclic oligomer components to be produced by the decomposition of dimethyl silicone oil, thereby elevating the flash point of the dimethyl silicone oil.
    Type: Grant
    Filed: April 30, 1982
    Date of Patent: February 14, 1984
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventor: Sachio Yasufuku
  • Patent number: 4430470
    Abstract: Flame retardant additive comprising alumina trihydrate and a methyl hydrogen polysiloxane which when added to ethylene polymers provide compositions which have improved flame retardant properties, have reduced gas evolution, do not drip or give off noxious gases on burning and are particularly useful as jacketing material about wire and cables.
    Type: Grant
    Filed: June 30, 1982
    Date of Patent: February 7, 1984
    Assignee: Nippon Unicar Company Ltd.
    Inventors: Seiho Taniguchi, Yuichiro Sakuma, Tadashi Yoshii
  • Patent number: 4405687
    Abstract: A polyborosiloxane composition to be used for the formation of an insulating layer on an electric conductor comprises (A) a polyborosiloxane produced by the reaction of boric acid, a boric acid derivative, or a halogenated boron with a silane compound and a silicone oil, (B) a silicone resin or a synthetic resin having a nitrogen-containing heterocyclic ring in the molecule, (C) an inorganic filler, and (D) a common solvent for (A) and (B). An insulated electric wire excellent in thermal resistance is obtained by applying the composition to an electric conductor and baking the applied layer of the composition.
    Type: Grant
    Filed: April 9, 1982
    Date of Patent: September 20, 1983
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventors: Minoru Morita, Etsuo Hosokawa, Kohzoh Arahara
  • Patent number: 4400429
    Abstract: An unfilled polymeric composition having improved electrical treeing and water treeing properties comprising a polymeric component and effective amounts of a hydrocarboxyalkoxy silane and a fatty acid. These compositions are particularly useful as insulation for high voltage transmission and distribution cables.
    Type: Grant
    Filed: June 30, 1982
    Date of Patent: August 23, 1983
    Assignee: National Distillers and Chemical Corporation
    Inventors: Anthony Barlow, Melvin F. Maringer
  • Patent number: 4399064
    Abstract: Tracking is reduced in insulators comprising one or more polymers and an anti-tracking filler system comprising (a) a hydrate of alumina having a specific surface area of at least 2 m.sup.2 /g measured by the BET method, and (b) a compound selected from the group consisting of oxides, mixed oxides and mixtures of oxides wherein said compound contains at least one element selected from the group consisting of transition series elements, lanthanide series elements and nontransuranic actinide series elements.
    Type: Grant
    Filed: January 3, 1980
    Date of Patent: August 16, 1983
    Assignee: Raychem Corporation
    Inventor: Richard J. Penneck
  • Patent number: 4385203
    Abstract: An improved sheathed cable and method for producing same is described. The cable includes an inner insulated conductor/conductor group, an outer corrugated metal sheath, and a barrier layer of a pliable, inert sealing material disposed therebetween to prevent the passage of gas or vapors via the cable. The method includes the steps of applying the pliable material around the inner insulated conductor/conductor group, wrapping the pliable material with a flexible tape, forming an outer metallic sheath around the material, and making annular corrugations in the outer sheath so as to compress the sealing compound.
    Type: Grant
    Filed: March 3, 1981
    Date of Patent: May 24, 1983
    Assignee: The Okonite Company
    Inventors: John G. Faranetta, Robert G. Feller
  • Patent number: 4275769
    Abstract: This disclosure relates to a fireguard for protecting a hose or an assembly of a hose and fittings. The fireguard includes a layer or tube of a silicone compound which is positioned around the hose, and a metal shroud or sleeve which encloses the layer of silicone compound. The silicone compound and the shroud protect the hose at normal temperatures and for a short length of time at a high temperature. In the event the high temperature persists for a length of time, the silicone compound decomposes to a layer of silica ash, which is held in place between the shroud and the hose, and the ash forms an excellent heat insulation for an extended time. The shroud is preferably flexible so that the hose may be bent, and the fireguard preferably also includes another layer of the silicone compound and a collar around each hose fitting.
    Type: Grant
    Filed: November 9, 1979
    Date of Patent: June 30, 1981
    Assignee: Stratoflex, Inc.
    Inventor: Horise M. Cooke