Elemental Metal Dnrm Patents (Class 524/439)
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Patent number: 5714536Abstract: A magnetic composition comprising nanocomposite particles comprising from about 0.001 to about 60 weight percent of magnetic nanocrystalline particles dispersed in from about 40 to about 99.999 weight percent of a discrete phase matrix, and a continuous phase matrix, wherein the discrete phase resides in interstices within the continuous phase matrix.Type: GrantFiled: January 11, 1996Date of Patent: February 3, 1998Assignee: Xerox CorporationInventors: Ronald F. Ziolo, Javier Tejada Palacios, Xixiang Zhang
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Patent number: 5698623Abstract: Addition of a polyurethane or polyurea polymer to each part of a particulate filled precursor of a two-part resin stabilizes the filler against settling from suspension, and provides thixotropic response when the precursors are expressed from a container.Type: GrantFiled: June 12, 1996Date of Patent: December 16, 1997Inventor: Richard L. Jacobs
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Patent number: 5696181Abstract: An improved denture adhesive composition is comprised of a highly cross-linked lower alkyl ether/maleic acid or maleic anhydride copolymer in which up to about 85% of the initial free carboxyl groups are reacted with one or more cross-linking agents. The cross-linking agents are mixtures of inorganic divalent cations such as calcium, magnesium and zinc together with organic bifunctional compounds comprised of polyhydroxyl compounds such as propylene glycol, glycerin and the like. The copolymer has a specific viscosity of no less than 1.5. A hydrophilic polymer such as sodium alginate or carboxymethyl cellulose may also be added to the lower alkyl vinyl ether/maleic acid or maleic anhydride copolymer which is then formulated with other excipients in a paste, powder, liquid, gel or cream composition.Type: GrantFiled: September 22, 1995Date of Patent: December 9, 1997Assignee: The Block Drug Company, Inc.Inventors: Tiang-Shing Chang, Donna DiFerdinando
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Patent number: 5667767Abstract: Disclosed are compositions suitable for use in embolizing blood vessels which compositions comprise an ethylene vinyl alcohol copolymer, a biocompatible solvent and a water insoluble contrasting agent selected from the group consisting of tantalum, tantalum oxide and barium sulfate. Also disclosed are methods for embolizing a blood vessel using the compositions described herein.Type: GrantFiled: July 27, 1995Date of Patent: September 16, 1997Assignee: Micro Therapeutics, Inc.Inventors: Richard J. Greff, Michael L. Jones, Scott Evans
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Patent number: 5665809Abstract: The invention provides for a method of making simple or complex extruded gel profiles and the created article. In a particularly preferred embodiment, the method involves the extrusion of a silicone gel composition through a die into a heated fluid to complete the cure of the gel as well as to produce the desired gel profile shape. Shapes such as stars, trapezoids, cusped squares, cusped triangle, triangles and the like can be fabricated according to the method.Type: GrantFiled: December 2, 1996Date of Patent: September 9, 1997Assignee: Raychem CorporationInventor: Janusz Wojtowicz
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Patent number: 5665808Abstract: A low toxicity, high density composite bullet material is disclosed and its use in a practice ammunition projectile. The material includes a compacted mixture of fine lead particles each encapsulated by a non toxic thermoplastic resin. The mixture which is compacted and formed by compression molding or injection molding, has a specific density of at least 7.Type: GrantFiled: January 10, 1995Date of Patent: September 9, 1997Inventors: Stephen J. Bilsbury, Bruce E. Burdick
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Patent number: 5661207Abstract: The invention provides novel polyurethanes which can be used in magnetic media binders applications. The polyurethanes comprise multidentate chelating functional groups pendant from the polymer backbone, which groups are produced by esterification of backbone hydroxyl moieties with cyclic dicarboxylic acid anhydrides which also bear an additional polar functional group such as those selected from the group consisting of --H, --OH, --COOM, --SO.sub.3 M, --SH, --CH.sub.2 COOM, --SCH.sub.2 COOM, --P(.dbd.O)(OM).sub.2, --OP(.dbd.O)(OM).sub.2, and the like. Examples of anhydrides useful in preparation of the polyurethanes include anhydrides of citric acid, mercaptosuccinic acid, dimercaptosuccinic acid and nitrilotriacetic acid. The polyurethanes, which are optionally radiation curable, show high affinity for magnetic pigments, and blends of the polyurethanes with vinyl resins afford excellent binders for magnetic recording media.Type: GrantFiled: March 8, 1996Date of Patent: August 26, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: James G. Carlson, Jack G. Truong, Jeffrey T. Anderson, Nelson T. Rotto
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Patent number: 5653918Abstract: Highly flexible and mechanically robust screen-printable conductor composition containing a) a conductive phase comprising Ag, Au, Cu, Ni, Pd, Pt, C or graphite and mixtures thereof dispersed in a polymer solution containing b) a terpolymer of polyvinyl acetate, vinyl chloride and a polar component dissolved in a volatile solvent.Type: GrantFiled: January 11, 1996Date of Patent: August 5, 1997Assignee: E. I. Du Pont de Nemours and CompanyInventor: Simon Martin Towlson
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Patent number: 5650461Abstract: The present invention relates to paint compositions which provide a Chemical Agent Resitant Coating (CARC), consisting of one layer topcoat paint system, which imparts an increase in the reflectivity at the thermal infra-red region, while controlling the colour in the visible range and are maintaining a low gloss, comprising: an extender selected from polyolefins and substituted polyolefins; a pigment, selected from a metal oxide calcined at a temperature of above 600.degree. C. and a paste of metal flakes and any mixture thereof; a binder consisting of a modified polyurethane resulted from an isocyanate and a co-reactant possessing at least two hydroxy groups, and a solvent system to dissolve the components in the paint composition.Type: GrantFiled: September 6, 1995Date of Patent: July 22, 1997Assignee: State of Israel-Ministry of Defence, Armament Development Authority, RAFAELInventors: Shulamit Wasserman, Igal E. Klein
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Patent number: 5636492Abstract: A construction element has a thickness substantially less than at least one of its other dimensions. In terms of weight, the construction element is comprised of more than 50% plastic and less than 50% pieces of metal band. The pieces of metal band are single pieces, flat, bent into a three dimensional configuration, and randomly oriented and embedded in the plastic. The pieces of metal band are shorter than the construction element is thick.Type: GrantFiled: May 21, 1990Date of Patent: June 10, 1997Inventor: Gerhard Dingler
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Patent number: 5631311Abstract: Transparent electroconductive coating compositions, methods to prepare such coating compositions, and substrates coated with these coating compositions. The coatings are based on polymeric resins containing finely dispersed electroconductive powders. The coatings can be characterized by the following: thermoformable while retaining transparency and electrical conductivity that is insensitive to humidity; low chloride extractability, stable to exposure to isopropanol or water/soap solutions.Type: GrantFiled: August 18, 1994Date of Patent: May 20, 1997Assignee: E. I. Du Pont de Nemours and CompanyInventors: Oswald R. Bergmann, Carol A. Brevett, Carl B. Douglas, Peter C. Szeto
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Patent number: 5623013Abstract: A Xonotlite-reinforced organic polymer composition obtained by mixing (A) an organic polymer and (B) fibrous Xonotlite, in which the fibrous Xonotlite (1) satisfies conditions (a), (b), and (c):(a) 0.1 .mu.m.ltoreq.D.ltoreq.0.4 .mu.m(b) 1 .mu.m.ltoreq.L <5 .mu.m(c) 10.ltoreq.L/D .ltoreq.15wherein D and L represent an average fiber diameter and an average fiber length, respectively, of fibrous Xonotlite (B);(2) has a BET specific surface area of not less than 21 m.sup.2 /g as measured by nitrogen adsorption; (3) has had its surface treated with a surface active agent and/or a coupling agent; and (4) has been formed into granules. The composition exhibits improved mechanical characteristics and improved balance between heat resistance and impact resistance.Type: GrantFiled: August 2, 1995Date of Patent: April 22, 1997Assignee: Ube Industries, Ltd.Inventors: Hideho Tanaka, Yukihiko Asano, Kunio Watanabe, Hisataka Uchimura
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Patent number: 5616642Abstract: The invention relates to lead-free frangible ammunition wherein the bullets are made of from 85% to 93% by weight of powders of copper, tungsten, ceramic, bismuth, stainless steel or bronze, or blends/alloys of the identified materials, the powder present in a polyester matrix with a small amount of ionomer. The bullets are injection molded under pressure to produce a projectile of appropriate size and weight and comparable to similarly sized live ammunition. The consistency of the bullet is such that it is frangible and will break upon impact with any hard surface, such as sheet steel. Polyester is a preferred polymeric matrix material in that it is a far more dense polymer than previously used nylons. The specific gravity of polyesters is .about.1.30, as compared with .about.1.02 for nylons. This enables the fabrication of a bullet with a greatly increased weight, for while the copper/polymer ratio remains at approximately the 90/10 range, the increased density allows for more actual copper by weight.Type: GrantFiled: April 14, 1995Date of Patent: April 1, 1997Inventors: Harley L. West, John F. Mullins
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Patent number: 5607996Abstract: This invention is directed to an ER elastomer composition comprising natural rubber and polarizable particles dispersed therein, which elastomer can undergo changes in Youngs modulus when subjected to an electric field and having a Youngs modulus of at least about 2 Mpa when not subject to an electric field, wherein the ratio of the electrical conductivity of the particles to the electrical conductivity of the natural rubber is between about 10.sup.4 and 10.sup.10. The invention also include variable stiffness mounts, such as engine mounts, made from the composition.Type: GrantFiled: October 5, 1994Date of Patent: March 4, 1997Assignee: Ford Motor CompanyInventors: Mark E. Nichols, John M. Ginder, Larry D. Elie, Robert A. Pett
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Patent number: 5604285Abstract: A resin composition for a sliding part comprising 5 to 45% by volume of a carbon fiber, 1 to 25 by volume of a metal powder and a remaining amount of a melt-processable fluorine-containing resin. A molded article made of the composition has a low friction coefficient having a narrow fluctuation range and has an excellent abrasion resistance to a soft metal.Type: GrantFiled: December 8, 1994Date of Patent: February 18, 1997Assignee: Daikin Industries, Ltd.Inventors: Tsuyoshi Miyamori, Masami Kato, Masaji Komori, Tetsuo Shimizu
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Patent number: 5604289Abstract: Thermoplastic material comprising at least one thermoplastic polymer and 1 to 1000 ppm (by weight) of at least one substance which substantially absorbs infrared radiation, such as carbon black. The reinforcement-fibre bundles impregnated with a thermoplastic polymer, in accordance with the invention, are particularly advantageous for reinforcing pipes by filament winding.Type: GrantFiled: February 15, 1995Date of Patent: February 18, 1997Assignee: Solvay (Societe Anonyme)Inventor: Didier Delimoy
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Patent number: 5602197Abstract: Thermoplastic binder compositions comprising a high molecular weight polymer component and a molten wax component are compounded with sinterable ceramic or other inorganic powders. Upon cooling, a thermally reversible gel is formed in the binder by the gelation of the polymer in the molten wax. Ceramic batches comprising these binders behave as shear-thinning and thermally reversible gels. They exhibit substantially improved dewaxing performance and, preferably, extensibility sufficient for sheet reforming processes.Type: GrantFiled: November 25, 1992Date of Patent: February 11, 1997Assignee: Corning IncorporatedInventors: Ronald E. Johnson, Jean M. News
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Patent number: 5594064Abstract: A composition comprising an inorganic filler and binder component containing a glassy polymer and a rubbery polymer is provided. The glassy polymer contacts and encapsulates the filler. The compositions are especially useful in the fabrication of flexible magnetic recording media and abrasive articles.Type: GrantFiled: May 3, 1995Date of Patent: January 14, 1997Assignee: International Business Machines CorporationInventor: Richard L. Bradshaw
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Patent number: 5576358Abstract: A composition containing a matrix, a fiber, a filler; and a friction modifier; wherein an effective amount of at least one of said components selected from the group consisting of fiber, filler, friction modifier and combinations thereof are cure promoting compounds having an effective aspect ratio such that the composition is rapidly cured in the presence of electromagnetic energy, and a process for curing such compositions.Articles comprised of this composition are suitable for use in the production of friction materials, such as brake pads, drum linings, and clutches.Type: GrantFiled: February 3, 1995Date of Patent: November 19, 1996Assignee: AlliedSignal Inc.Inventors: Kwok W. Lem, John W. Lokerson, Young D. Kwon
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Patent number: 5567355Abstract: An intrinsically conductive polymer is in the form of a dispersible solid of primary particles with a specific surface area according to BET of >15 m.sup.2 /g and with an average diameter of less than 500 nm, in which preferably not more than 20% of aggregates with an average size >1 .mu.m are present in the particle size range >500 nm. For the manufacture of the polymer the polymerization is carried out in a solvent in which the appropriate monomer is soluble or colloidally dispersible, but in which the polymer that is formed is insoluble, whereby the temperature of the reaction mixture is not allowed to rise more than 5.degree. C. above the starting temperature.Type: GrantFiled: May 12, 1993Date of Patent: October 22, 1996Assignee: Zipperling Kessler & Co. (GmbH & Co.)Inventors: Bernhard Wessling, Harald Volk, Susanne Bl attner
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Patent number: 5565041Abstract: A polysilane composition containing conductor or semiconductor particles useful as a portion of a non-linear optical device.Type: GrantFiled: May 26, 1995Date of Patent: October 15, 1996Assignee: Kabushiki Kaisha ToshibaInventors: Toshiro Hiraoka, Shin-ichi Nakamura, Yoshihiko Nakano, Shinji Murai, Shuzi Hayase
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Patent number: 5554678Abstract: An electromagnetic shielding composite containing a thermosplastic synthetic resin mixed with a metal conductive fiber, low melting point metal, and a vapor-phase grown carbon fiber, which preferably includes, to the total weight of the composite, a thermoplastic synthetic resin of 40-90 weight %, a metal conductive fiber of 0.5-30 weight % and a vapor-phase grown carbon fiber of 0.5-50 weight %.Type: GrantFiled: April 27, 1995Date of Patent: September 10, 1996Assignee: Yazaki CorporationInventors: Makoto Katsumata, Hidenori Yamanashi, Hitoshi Ushijima
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Patent number: 5541238Abstract: Disclosed is a fiber of an organic, inorganic or metallic material or a simple substance wherein ultrafines of an inorganic or metallic material or a simple substance having an average particle diameter of 0.005-1 .mu.m are uniformly dispersed and deposited on 8-90% of the surface in a single layer. The fiber is produced by exposing a fiber of an organic, inorganic or metallic material or a simple substance to a gaseous stream forming ultrafines of an inorganic or metallic material or a simple substance by a vapor phase process, thereby contacting said ultrafines in the gaseous stream with said fiber in a state wherein the ultrafines are still active. The treated fiber is useful as a reinforcing material for a fiber reinforced composite.Type: GrantFiled: October 8, 1993Date of Patent: July 30, 1996Assignees: Nisshin Flour Milling Co., Ltd., Kaoru Umeya, Ryobi LimitedInventors: Yukiyoshi Yamada, Tadashi Fuyuki, Eisuke Kuroda, Satoshi Akiyama, Naoto Tonoike, Kaoru Umeya, Kazunobu Ogawa, Kazuya Miyazaki, Hitoshi Nagasaka
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Patent number: 5534582Abstract: Thermoplastics film containing inorganic fillers, metal/plastics composite containing inorganic fillers and process for the production thereof.The present invention relates to thermoplastics films, which contain at least 0.1% by weight, preferably 0.5 to 6% by weight, based on the total weight of the mixture of plastics and filler, of one or more metal powders, selected from aluminum powder, magnesium powder, zinc powder and manganese powder. The invention further relates to metal/plastics composites containing these metal powders, and processes for the production of the thermoplastics films and the metal/plastics composites. The plastics films and the metal/plastics composites are used for producing packaging containers.Type: GrantFiled: May 25, 1994Date of Patent: July 9, 1996Assignee: BASF Lacke + Farben, AGInventors: Siegfried Krause, Leonidas Kiriazis
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Patent number: 5530051Abstract: The present invention relates to a synthetic resin composition for obtaining a molded article which has a metallic appearance like the brilliance of Milky Way, and is used in OA instruments, AV instruments cameras, telephones, electric shavers, wheel caps for automobiles, vessels for cosmetics, and the like. The synthetic resin composition comprises 100 parts by weight of a thermoplastic resin, and as a metallic pigment, from 0.2 to 5 parts by weight of lustrous metal particles having an average particle diameter (maximum length) of from 50 to 800 .mu.m, and a ratio .sigma./x of a standard deviation of a particle diameter (.sigma.) to an average particle diameter (x) of 0.1 or less, or from 0.2 to 10 parts by weight of lustrous metal fine pieces having an average particle diameter of from 50 to 800 .mu.m, and an average shape ratio (thickness/average particle diameter) of from 1/100 to 1/8.Type: GrantFiled: December 7, 1994Date of Patent: June 25, 1996Assignee: Kanegafuchi Kagaku Kabushiki KaishaInventors: Atsushi Hirata, Kazushi Hirobe
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Patent number: 5516816Abstract: This invention relates to a friction composition comprising oxidized or phoisphotized metal fibers and to friction elements fabricated therefrom.Type: GrantFiled: February 12, 1993Date of Patent: May 14, 1996Assignee: AlliedSignal Inc.Inventor: George J. Samuels
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Patent number: 5510398Abstract: A highly filled, extruded thermoplastic material which has a smooth, uniform speckled surface without any secondary finishing operations. The thermoplastic material contains a polyalkylene terephthalate resin, a polycarbonate resin, a large quantity of a filler material, a stabilizer for the resin materials and a sufficient quantity of a non-dispersing pigment to give the extruded thermoplastic material a speckled surface appearance.Type: GrantFiled: April 7, 1994Date of Patent: April 23, 1996Assignee: General Electric CompanyInventors: Angelika H. Clark, Eileen B. Walsh
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Patent number: 5492958Abstract: Disclosed is a method of forming metal containing ceramic coatings on substrates. The method comprises applying a coating of hydrogen silsesquioxane resin and a metallic filler onto a substrate and heating the coated substrate at a temperature sufficient to convert the hydrogen silsesquioxane resin to a silica containing ceramic matrix containing the metallic filler.Type: GrantFiled: March 13, 1995Date of Patent: February 20, 1996Assignee: Dow Corning CorporationInventors: Loren A. Haluska, Keith W. Michael
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Patent number: 5492946Abstract: A molded article having improved weld line strength, fabricated from a polymer blend composition comprising at least one liquid crystalline polymer and at least one additional polymer, wherein the composition has a crystallization rate lower than said at least one liquid crystalline polymer.Type: GrantFiled: July 28, 1994Date of Patent: February 20, 1996Assignee: Amoco CorporationInventors: Paul J. Huspeni, John F. Petry, Roger W. Nelson, Steven R. Dunkle
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Patent number: 5489641Abstract: In accordance with the present invention, there is provided a novel composition for attaching a semiconductor device to a substrate. The invention composition comprises liquid monomer vehicle comprising at least two monomers wherein at least one monomer is a polycyanate ester monomer, electrically conductive filler, and a curing catalyst. Compositions of the invention remain homogeneous at room temperature for at least eight hours.Type: GrantFiled: February 26, 1993Date of Patent: February 6, 1996Assignee: Quantum MaterialsInventor: Stephen M. Dershem
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Patent number: 5486560Abstract: A variable-modulus material is composed of a polymer whose constituent unit is a thiophene or pyrrole molecule having from one to three C.sub.4-12 alkyl side chains, or a copolymer whose constituent unit is the thiophene or pyrrole molecule and which includes in a main chain thereof a conjugated compound with a K-electron bond directly bonded to the above molecule, and at least one additive (in an amount of 0.5-20 wt % of said polymer) selected from halogens, protonic acids, and transition metal halides. It greatly decreases in modulus upon application of an electric field as low as 5-150 V/mm and restores its original modulus upon removal of the electric field. It is suitable for use as vibration dampers and shock absorbers.Type: GrantFiled: October 11, 1994Date of Patent: January 23, 1996Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Tohru Shiga, Yoshiharu Hirose, Akane Okada, Toshio Kurauchi
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Patent number: 5482656Abstract: A polysilane composition containing conductor or semiconductor particles useful as a portion of a non-linear optical device.Type: GrantFiled: March 4, 1994Date of Patent: January 9, 1996Assignee: Kabushiki Kaisha ToshibaInventors: Toshiro Hiraoka, Shin-ichi Nakamura, Yoshihiko Nakano, Shinji Murai, Shuzi Hayase
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Patent number: 5475043Abstract: A material with variable viscoelasticity is composed of an electrically insulating polymeric material, and fine particles dispersed therein and capable of electric polarization under an applied electric field. The particles may, for example, be of a conjugated and unsaturated organic compound, a polyelectrolyte, or an organometallic complex salt. The material is capable of a reversible change of viscoelasticity depending on the intensity of the applied electric field.Type: GrantFiled: August 4, 1994Date of Patent: December 12, 1995Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Tohru Shiga, Norio Sato, Yoshiharu Hirose, Akane Okada, Takashi Ohta, Toshio Kurauchi
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Patent number: 5475048Abstract: Conductor-filled thermosetting resins having a free radical based cure chemistry are prepared for use as solder paste replacements for electrical conducting attachments of surface mount electronics components to printed circuit boards and as a die attach adhesive. The thermosetting resins exhibit rheological properties that allow them to be substituted for state-of-the-art solder paste and die attach adhesives. The conductor filled resins can be thermally cured in in-line processing operations to provide a low stress, substrate adherent, electrically conductive resin matrix.Type: GrantFiled: December 7, 1993Date of Patent: December 12, 1995Assignee: Thermoset Plastics, Inc.Inventors: William L. Jamison, Andrzej Moscicki
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Patent number: 5474522Abstract: The present invention provides an article, comprising: a fabric sheet; a curable resin coated onto the fabric sheet; and a plurality of microfiber fillers dispersed into the resin. The incorporation of microfiber fillers into the casting materials of the present invention adds substantially to the strength of the cured casting material, particularly when the fabric used therein is a non-fiberglass fabric, while not detracting from the handling properties of the uncured casting tape or bandage.The microfiber fillers useful in this invention are generally characterized as being short fibers having an aspect ratio greater than five to one. Blends of microfibers having different aspect ratios may be utilized in the casting tapes of the present invention. Preferred microfiber fillers or blends have an aspect ratio between 5:1 and 200:1, more preferably, the aspect ratio of the microfiber is between 5:1 and 50:1, and most preferably, the aspect ratio of the microfiber is between 10:1 and 30:1.Type: GrantFiled: May 24, 1994Date of Patent: December 12, 1995Assignee: Minnesota Mining and Manufacturing CompanyInventors: Matthew T. Scholz, Worku A. Mindaye
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Patent number: 5472639Abstract: A lightweight, electroconductive foam comprising an effective amount of a conductive ionic salt, a polymer capable of complexing said conductive ionic salt and an effective amount of particulate conductive material such as carbon black or metal is disclosed. Additionally, a method of preparing a lightweight electroconductive foam having a surface resistivity less than about 10.sup.10 ohms per square by an extrusion process is disclosed. Foams of the present invention exhibit relatively high conductivities yet require only relatively low amounts of particulate conductive material.Type: GrantFiled: August 13, 1993Date of Patent: December 5, 1995Assignee: The Dow Chemical CompanyInventor: Peter C. Yao
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Patent number: 5470643Abstract: A polymer thick film resistor composition is disclosed which comprises: (1) finely divided particles of a conductive metal having a surface area of 0.3 to 3.0 m.sup.2 /g; (2) finely divided particulate material having a surface area greater than 100 m.sup.2 /g; (3) a thermoplastic resin; dissolved in (4) an organic solvent having a volatility rating of 10,000 to 50,000; wherein the composition is substantially curable within 2.5 minutes by heating to a temperature of 135.degree. C., and further wherein the volume ratio of particulate material to resin is at least 3.5, and the weight ratio of solvent to resin is 3 to 5.Type: GrantFiled: June 15, 1994Date of Patent: November 28, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventor: Jay R. Dorfman
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Patent number: 5468798Abstract: A basecoat for a nonstick coating system wherein the basecoat comprises a high temperature binder resin, preferably polyamideimide resin, and a filamentary powder, preferably a nickel powder, which is combined with the high temperature binder to yield a spongelike coating which with appropriate application has a rough surface and an internal structure containing interlocking channels. These channels may be impregnated by subsequently applied coatings, especially nonstick fluoropolymer coatings.Type: GrantFiled: February 18, 1994Date of Patent: November 21, 1995Assignee: Whitford CorporationInventor: Lawrence D. Leech
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Patent number: 5459189Abstract: A resin composition having improved resistance to discoloration caused by exposure to light, which comprises (a) 5-95% by weight of a polyphenylene ether alone or in combination with a styrene polymer, (b) 95-5% by weight of a polyamide, and based on 100 parts by weight of the sum of (a) and (b), (c) 0.01-30 parts by weight of one or more agents to improve the compatibility of a polyphenylene ether and a polyamide, (d) 0-50 parts by weight of one or more agents to improve the impact resistance, and (e) 0.1-15 parts by weight of metal particles having 10 .mu.m or less of weight average particle size and 3 or more of aspect ratio, and 60% by weight or more of (e) metal particles being included in (b) a polyamide.Type: GrantFiled: January 24, 1994Date of Patent: October 17, 1995Assignee: Sumitomo Chemical Company, Ltd.Inventors: Hiroshi Hagimori, Yasuro Suzuki, Kaoru Kitadono, Takashi Sanada
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Patent number: 5457151Abstract: An adhesive composition for joining carbon--carbon composites comprising a polymeric thermosetting polysilazane, a ceramic powder, silicon powder, and carbon powder. The invention also comprises the method of making carbon--carbon composite structures utilizing such adhesive composition and to the resultant products.Type: GrantFiled: March 11, 1994Date of Patent: October 10, 1995Assignee: Southwest Research InstituteInventors: Renee C. Graef, David G. Paquette, Stuart T. Schwab
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Patent number: 5451629Abstract: Composition and method for a conductive interconnection composition in bonding relation with electronic components including combining and upon combining expressing from a mix tip onto conductive portions of electronic components a silver filled first side urethane resin precursor comprising an aliphatic isocyanato reagent and a silver filled second side urethane resin precursor comprising a polyol reagent immediately reactive with the first side precursor isocyanato reagent, the silver being present in the composition in an amount sufficient to conduct electricity to and from the electronic components.Type: GrantFiled: April 28, 1994Date of Patent: September 19, 1995Inventor: Richard Jacobs
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Patent number: 5447988Abstract: In accordance with the present invention, there is provided a novel composition for attaching a semiconductor device to a substrate. The invention composition comprises liquid polycyanate ester monomer, electrically conductive filler, and a curing catalyst, in the substantial absence of alkylphenol. The recognition that attach paste compositions are effective without the addition of alkylphenol has the benefit of reducing the cost of preparation, as well as the ease of preparation of die attach pastes containing electrically conductive filler and polycyanate ester monomer. The incorporation of alkylphenol into die-attach paste compositions has been found to be unnecessary, due to the presence of catalytically active species on the surface of filler flake employed in the preparation of such pastes.Type: GrantFiled: November 23, 1993Date of Patent: September 5, 1995Assignee: Quantum MaterialsInventors: Stephen M. Dershem, Dennis B. Patterson, Deborah L. Derfelt
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Patent number: 5446085Abstract: A composition comprising an inorganic filler and binder component containing a glassy polymer and a rubbery polymer is provided. The glassy polymer contacts and encapsulates the filler. The compositions are especially useful in the fabrication of flexible magnetic recording media and abrasive articles.Type: GrantFiled: June 15, 1993Date of Patent: August 29, 1995Assignee: International Business Machines CorporationInventor: Richard L. Bradshaw
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Patent number: 5434210Abstract: Thermal spray powders are characterized by the presence of a matrix-forming component, a solid lubricant component and a plastic component. Abradable coatings formed by thermal spraying the powders abrade readily to form abradable seals. The abradable coatings have a metal, metal alloy, or ceramic matrix with discrete inclusions of solid lubricant and plastic. The thermal spray powders may be prepared as mechanically fused agglomerates.Type: GrantFiled: September 28, 1992Date of Patent: July 18, 1995Assignee: Sulzer Plasma Technik, Inc.Inventors: Subramaniam Rangaswamy, Robert A. Miller
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Patent number: 5432223Abstract: A novel high-performance binder system is provided for the fabrication of segregation-free iron based powder blends. The blends are prepared by using a binder system comprising thermoplastic resin polyvinylpyrrolidone and a suitable compatible plasticizer such as polyethylene glycol, and optional solid lubricants. The binder system enables the manufacture of segregation-free iron-based powder blends with high flow rate and compressibility, enhanced apparent density, green strength and transverse rupture strength, and low dimensional variations compared to unbonded powder blends and to blends made with PVP or PEG only as the binder.Type: GrantFiled: August 16, 1994Date of Patent: July 11, 1995Assignee: National Research Council of CanadaInventors: Blaise Champagne, Kenneth Cole, Sylvain Pelletier
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Patent number: 5432224Abstract: Moldable compositions comprising metallic powder or combination thereof with ceramic powder, mixed an organic binder are disclosed, at least a part of which comprises a synthetic resin component (A) having a heat deformation temperature of 130.degree. C. or higher. The component A may be used in combination with another component (B) having a melting point of 30.degree. C.-100.degree. C., with or without another thermoplastic component (C), having a heat deformation temperature of 13.degree. C. or less. Moldable compositions, comprising metallic and/or ceramic powder mixed with an organic binder comprising a secondary or tertiary amine (D), or combination thereof with a thermoplastic resin (E), are also disclosed.Type: GrantFiled: July 22, 1991Date of Patent: July 11, 1995Assignee: Sanyo Chemical Industries, Ltd.Inventors: Jiroh Ryuhgoh, Kohshi Kawamoto, Tadahiro Osanaga, Yoshiroh Nakata
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Patent number: 5428096Abstract: An oil-repellent fluororubber composition obtained by compounding a low-molecular weight tetrafluoroethylene resin with a peroxide crosslinked fluororubber having a Mooney viscosity of 90 or more ML.sub.1+10 (100.degree. C.) or compounding a low-molecular weight tetrafluoroethylene resin and an inorganic filler selected from powders of solid substances, such as iron, nickel, cobalt, iron-cobalt alloy, molybdenum, tungsten, tantalum and tungsten-carbide, having surface energy higher than that of copper with a peroxide crosslinked fluororubber. An oil-repellent fluororubber elastomer having excellent oil repellency and at the same time maintaining original mechanical and physical characteristics sufficiently can be obtained, using easily available materials on the market without any special means of processing and treatment.Type: GrantFiled: February 18, 1994Date of Patent: June 27, 1995Assignee: Kinyosha Company, LimitedInventor: Noritomo Fukunaga
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Patent number: 5428098Abstract: A fiber-reinforced cycloolefin polymer material comprises 1 to 99% by weight of reinforcing fibers, in particular glass fibers, and 99 to 1% by weight of a cycloolefin copolymer which is built up froma) at least one (polycyclo)olefin which is derived from norbornene, for example tetracyclododecene, and b) at least one olefin which is chosen from monocycloolefins having 4 to 12 C atoms (VII) and/or the group of acyclic olefins VIII ##STR1## in which R.sup.9, R.sup.10, R.sup.11 and R.sup.12 are identical or different and are a hydrogen atom or a C.sub.1 -C.sub.8 -alkyl radical. VII is preferably ethylene. The monomer units of the (polycyclo)olefin in the cycloolefin copolymer molecule are in each case separated by monomer units of the cyclic olefins VII and/or of the acyclic olefins of the formula VIII.Type: GrantFiled: January 27, 1994Date of Patent: June 27, 1995Assignee: Hoechst AktiengesellschaftInventors: Michael-Joachim Brekner, Horst-Tore Land, Frank Osan
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Patent number: 5425969Abstract: A method for coating an article made of polypropylene with an electrically conductive primer and thereafter electrostatically applying an organic solvent-type overcoat composition to the primer. The electrically conductive primer contains (A) a urethane-modified chlorinated polypropylene which is a mixture or addition reaction product of a chlorinated polypropylene and a polyurethane resin, the chlorinated polypropylene being prepared by chlorinating a homopolymer of propylene or a copolymer of propylene and another olefin monomer, (B) a melamine resin, (C) a polyester resin and (D) an electrically conductive substance such as carbon black, graphite, silver, nickel or copper. The electrically conductive primer has a surface resistivity of up to 1.times.10.sup.8 ohms after the application of the overcoat composition.Type: GrantFiled: June 23, 1993Date of Patent: June 20, 1995Assignees: Toyota Jidosha Kabushiki Kaisha, Kansai Paint Company, LimitedInventors: Jun Wakabayashi, Shizuo Miyazaki, Toru Tanaka, Junichi Yamashita, Akihiro Tsuge
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Patent number: RE35068Abstract: Ionized crosslinked polyacrylamide gels are provided that are capable of drastic volume changes in response to minor changes in solvent concentration, temperature of pH or salt concentration of the solvent. The gels can contain a metal ion.Type: GrantFiled: March 29, 1994Date of Patent: October 17, 1995Assignee: Massachusetts Institute of TechnologyInventors: Toyoichi Tanaka, Izumi Nishio, Shao-Tang Sun