Impregnation Patents (Class 428/396)
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Patent number: 6309994Abstract: A method of forming fiber reinforced aluminum phosphate bonded material having improved strength at elevated temperatures. The method comprises the steps of: (a) preparing a slurry by blending alumina and alumina phosphate solution, the slurry being substantially free of silica; (b) providing a fiber substrate; (c) infiltrating the solution into the fiber substrate; and (d) curing the infiltrated substrate to form a fiber reinforced aluminum phosphate bonded composite material. In a preferred embodiment of the present invention, the fiber substrate is made from SiC fibers.Type: GrantFiled: August 14, 1989Date of Patent: October 30, 2001Assignee: Aluminum Company of AmericaInventors: Robert A. Marra, Donald J. Bray, G. Edward Graddy, Jr., Siba P. Ray
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Patent number: 6294253Abstract: A sized staple fiber product that disperses quickly, thoroughly and uniformly in water is particularly useful in the manufacture of gypsum board by the slurry process. An aqueous chemical size composiiton on the surface of the fibers contains a high level of surfactant and can contain a polymer film former and a biocide. Preferably, the fiber is chopped glass fiber. Novel sizing composition and methods of making and using the fiber are also disclosed.Type: GrantFiled: August 11, 1999Date of Patent: September 25, 2001Assignee: Johns Manville International, Inc.Inventor: Henry Dall Smith, Jr.
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Patent number: 6287679Abstract: A method for forming a water swellable coating and a water swellable coating for forming a coated substrate are provided. The water swellable coatings are semi-gel dispersions of particulate superabsorbent polymer in a polyvinyl chloride plastisol. A dispersion is formed from the polymer and plastisol, then contacted with a substrate and heat cured to a semi-gel state. The coatings are capable of swelling in the presence of water to protect the substrates from water penetration, block water from penetrating the coatings to reach other substrates or to retain water to prevent leakage.Type: GrantFiled: January 22, 1998Date of Patent: September 11, 2001Assignee: Fiber-Line, Inc.Inventors: Vincent J. Pappas, Louis A. Vitola, Vernon Z. Detwiler
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Patent number: 6277768Abstract: The present invention is directed to a novel process of making N-isopropyl acrylamide (NiPAm) polymers based upon the reaction of poly(acrylic acid) and N-isopropylamine. The disclosed method of the present invention uses polyacrylic acid as a starting material to synthesize NiPAm polymers. In one embodiment, the present invention discloses a condensation reaction of an intermediate salt to form homopolymers, copolymers and terpolymers of N-isopropyl acrylamide (NiPAm) with acrylic acid and/or alkyl acrylates in a molten state, which is adaptable to a continuous reactive extrusion process. Binder compositions, water-dispersible products and thermoformable articles containing the NiPAm polymers are also disclosed.Type: GrantFiled: August 31, 1999Date of Patent: August 21, 2001Assignee: Kimberly Clark WorldwideInventors: Pavneet Singh Mumick, Yihua Chang, James Hongxue Wang
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Patent number: 6268468Abstract: The end group content of polyamide in the solid state may be reduced by treating the polyamide with gas-phase acid, anhydride, or amine. Stain- or dye-resistant polyamide fibers can be made by reducing the number of amino end groups. Reduction in the number of carboxylic end groups reduces the rate of regeneration of starting monomers during extrusion.Type: GrantFiled: July 10, 2000Date of Patent: July 31, 2001Assignee: BASF CorporationInventors: Otto M. Ilg, Harry Y. Hu, Scott R. Brank
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Patent number: 6191072Abstract: A cutting line for a rotating-line trimmer that simultaneously applies herbicide as vegetation is cut. The herbicidal cutting line comprises a flexible cutting-line core (13) herbicidal coating (15) that covers all or part of the line core and a thin protective shield (17) covering all or part of the herbicidal coating. As vegetation is cut, protective shield (17) ruptures exposing herbicidal coating (15) to vegetation. The cutting line is used with existing line trimmers in applications in which vegetation regrowth is objectionable.Type: GrantFiled: December 21, 1998Date of Patent: February 20, 2001Inventor: Niall Duffy
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Patent number: 6177367Abstract: A process for making synthetic fibers or nonwoven substrates hydrophilic made from the synthetic fibers comprising applying an effective amount of a finish composition onto the fibers or nonwoven substrates, the finish composition containing: (a) from 50 to 95% by weight of a hydrophobicizing agent selected from the group consisting of at least one quaternary ester amine salt corresponding to formula I: wherein R1 is an aliphatic alkyl group containing from 12 to 22 carbon atoms, R2 is either (CH2)n—O—COR1 or an alkyl group containing from 12 to 22 carbon atoms, R3 and R4, independently of one another, represent (CH2)n—R5, where R5 is H or OH and n is a number from 1 to 3, and X is either a halide, methosulfate, methophosphate or phosphate ion, a quaternary ester amine salt corresponding to formula II: wherein COR6 is an aliphatic acyl group containing from 12 to 22 carbon atoms and 0, 1, 2 or 3 double bonds, R7 is H or OH, n has a value of 1, 2 or 3 and XType: GrantFiled: May 25, 1999Date of Patent: January 23, 2001Assignee: Henkel Kommanditgesellschaft auf AktienInventor: Raymond Mathis
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Patent number: 6162541Abstract: Superabsorbent polymer compositions comprising a fiber-containing composition derived from cellulosic fibers, synthetic fibers or mixtures thereof which is at least partially coated with a partially acidified, hydrolyzed, internally plasticized, crosslinked, superabsorbing polymers derived from polysuccinimide and processes for preparing same.Type: GrantFiled: November 16, 1998Date of Patent: December 19, 2000Assignee: Solutia Inc.Inventors: Yueting Chou, Timothy Paul Feast, Jingen Zhang
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Patent number: 6150496Abstract: An inherently light- and heat-stabilized polyamide has at least one piperidine compound bonded to the backbone polymer chain and at least one 4-amino-2,2,6,6-tetramethylpiperidine compound bonded to the backbone polymer chain. The inherently light- and heat-stabilized polyamide may be used to form articles such as, for example, fibers, carpets, yarns, and textile fabrics.Type: GrantFiled: February 5, 1999Date of Patent: November 21, 2000Assignee: BASF CorporationInventors: Otto M. Ilg, Ulrike Breiner, Manfred Juluis
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Patent number: 6150495Abstract: Superabsorbent fiber composition comprising partially hydrolyzed, internally plasticized, crosslinked, superabsorbing fibers derived from polysuccinimide and process for preparing same. Superabsorbent film composition comprising partially hydrolyzed, internally plasticized, crosslinked, superabsorbing film derived from polysuccinimide and process for preparing same.Type: GrantFiled: July 24, 1998Date of Patent: November 21, 2000Assignee: Solutia Inc.Inventors: Yueting Chou, Timothy Paul Feast, Jingen Zhang
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Resin for an oriented-reinforcement prepreg that can be shaped and molded products that are obtained
Patent number: 6136883Abstract: A modified polyester-polyurethane resin is formed by reacting at least one polyisocyanate at least one polyol polyester that is prepared from at least one diacid or ethylenically unsaturated anhydride and at least one polyhydric alcohol, at least one ethylenically unsaturated monomer, at least one promoter of the decomposition of the catalyst peroxide, at least one catalyst of the isocyanate-alcohol reaction, and at least one hydroxylated (alk)acrylate and is used for the impregnation of oriented reinforcements. The resin makes possible quick molding, at moderate temperature, of parts with high mechanical properties.Type: GrantFiled: February 7, 1996Date of Patent: October 24, 2000Assignee: Cray Valley S.A.Inventors: Yeong-Show Yang, Francette Porato, Serge Lequeux -
Patent number: 6133090Abstract: A method of fabricating a capacitor. A transistor is formed on a substrate. The transistor comprises a gate and a source/drain region. A dielectric layer is formed over the substrate. A covering layer is formed on the dielectric layer. Portions of the covering layer and the dielectric layer are removed to form a contact opening. The contact opening exposes a portion of the source/drain region. A polysilicon layer is formed over the substrate to fill the contact opening. The polysilicon layer is electrically coupled with the source/drain region. A patterned photoresist layer is formed on the polysilicon layer above the contact opening. An anisotropic etching step is performed with the photoresist layer serving as a mask until a portion of the covering layer is exposed. An oxide layer is formed on the exposed covering layer. The surface of the oxide layer is higher than the surface of the polysilicon layer. The photoresist layer is removed to expose a portion of a sidewall of the polysilicon layer.Type: GrantFiled: May 27, 1999Date of Patent: October 17, 2000Assignee: United Semiconductor CorpInventor: Gary Hong
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Patent number: 6103864Abstract: The polyimides are derived from solutions of at least one low-boiling organic solvent, e.g. isopropanol containing a mixture of polyimide-forming monomers. The monomeric solutions have an extended shelf life at ambient (room) temperatures as high as 80.degree. C. and consist essentially of a mixture of monoalkyl ester-acids, alkyl diester-diacids and aromatic polyamines wherein the alkyl radicals of the ester-acids are derived from lower molecular weight aliphatic secondary alcohols having 3 to 5 carbon atoms per molecule such as isopropanol, secondary butanol, 2-methyl-3-butanol, 2 pentanol or 3-pentanol. The solutions of the polyimide-forming monomers have a substantially improved shelf-life and are particularly useful in the aerospace and aeronautical industry for the preparation of polyimide reinforced fiber composites such as the polyimide cured carbon composites used in jet engines, missiles, and for other high temperature applications.Type: GrantFiled: January 14, 1999Date of Patent: August 15, 2000Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: William B. Alston, Gloria S. Gahn
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Patent number: 6077606Abstract: A coated multi-filament reinforcing carbon yarn is encapsulated with a rubber composition. The rubber composition comprises resorcinol-formaldehyde reaction product, a vinylpyridine-styrene butadiene terpolymer, an acrylonitrile-butadiene copolymer and urea.Type: GrantFiled: September 12, 1997Date of Patent: June 20, 2000Assignee: The Goodyear Tire & Rubber CompanyInventors: James Gregory Gillick, Cecil Bennett, Jr.
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Patent number: 6074752Abstract: The invention relates to a metal fiber agglomerate comprising fibers with an equivalent diameter of between 1 .mu.m and 30 .mu.m and with a length of between 1 mm and 20 mm, with the feature that the core of the agglomerate contains at least one bundle of fibers oriented substantially parallel to one another, while the casing consists of a network of randomly oriented fibers. The invention also relates to a process for the manufacture of these metal fiber agglomerates, characterized by a succession of steps in which the agglomerate is subjected to a continuous tumbling movement.Type: GrantFiled: November 5, 1998Date of Patent: June 13, 2000Assignee: N.V. Bekaert S.A.Inventor: Dries Declercq
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Patent number: 6058603Abstract: This invention relates to non-metallic, corrosion-resistant strength systems for underwater power and communications systems and methods for terminating such cables. The strength system comprises two non-metallic strength members; each strength member is comprised of at least one glass strand, and each strand is comprised of a plurality of glass filaments that are bound together with a polymeric material. The first strength member is applied in a helical lay over transmission media which forms the core of the cable, and the second strength member is applied over the lay of the first strength member in a helical lay having a circular direction opposite to the lay of the first strength member. The invention further embraces a method of terminating such cables involving the use of an inner termination cone, an adhesive used to secure the strength members onto the inner termination cone, and an outer termination cone which is secured over the inner termination cone and adjoining strength members.Type: GrantFiled: October 14, 1998Date of Patent: May 9, 2000Assignee: Lucent Technologies Inc.Inventor: William C. Reed
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Patent number: 6051317Abstract: The invention relates to sheet-like absorbents for water and aqueous solutions, containing at a defined distributionA) at least one water-swellable synthetic and/or natural superabsorbent polymer, andB) at least one water-soluble synthetic and/or natural polymeras a matrix of sheet-like design wherein the superabsorbent component A) is integrated or fixed. The sheet-like absorbents have an increased absorptive capacity for water and aqueous liquids, particularly under load. They are manufactured by forming a sheet-like matrix from the water-soluble synthetic and/or natural polymers B) and providing same with said water-swellable synthetic and/or natural superabsorber A), e.g., by applying a solution of matrix B) on a surface, sprinkling same with component A), and drying the sheet-like structure thus obtained.Type: GrantFiled: August 20, 1997Date of Patent: April 18, 2000Assignee: Stockhausen GmbH & Co. KGInventors: Helmut Brueggemann, Kurt Dahmen, Dieter Lehwald, Roland Theilmann
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Patent number: 6037056Abstract: A reinforced pultrusion product comprises a polymeric matrix, at least one longitudinally oriented buckled reinforcement fiber embedded in said polymeric matrix, and at least one longitudinally oriented linear reinforcement fiber embedded in said polymeric matrix. The product is formed through a pultrusion process wherein a set of composite strands comprising reinforcement fibers and polymeric fibers are provided. A supplemental tension force is applied to a first subset of the composite strands. The composite strands are heated such that the polymeric fibers of a second subset of composite strands shrink to cause the reinforcement fibers in each of the second subset of composite strands to buckle. The heated set of composite strands, including the buckled reinforcement fibers, are consolidated in a pultrusion die.Type: GrantFiled: January 8, 1997Date of Patent: March 14, 2000Assignee: Owens Corning Fiberglas Technology, Inc.Inventors: Frank J. Macdonald, Margaret M. Woodside, Scott R. Taylor
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Patent number: 6033765Abstract: The present invention provides a printed circuit substrate comprising a lightweight prepreg and a conductive layer. The prepeg having uniform formation, low linear thermal expansion coefficient and good mechanical strength, comprising a porous para-oriented aromatic polyamide film and a thermoplastic resin and/or a thermosetting resin, the porous para-oriented aromatic polyamide film being impregnated with the thermoplastic resin and/or the thermosetting resin, a process for producing the same, and a printed circuit substrate/board using the same.Type: GrantFiled: June 23, 1998Date of Patent: March 7, 2000Assignee: Sumitomo Chemical Company, LimitedInventors: Tsutomu Takahashi, Yoshifumi Tsujimoto, Hiroaki Kumada, Hiroyuki Sato
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Patent number: 6027804Abstract: Superabsorbent polymer compositions comprising a fiber-containing composition derived from cellulosic fibers, synthetic fibers or mixtures thereof which is at least partially coated with a partially hydrolyzed, internally plasticized, crosslinked, superabsorbing polymer derived from polysuccinimide and processes for preparing same.Type: GrantFiled: November 17, 1998Date of Patent: February 22, 2000Assignee: Solutia Inc.Inventors: Yueting Chou, Timothy Paul Feast, Jingen Zhang
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Patent number: 5998023Abstract: A method for coating the surface of a substrate composed of a hydrophobic polymer with a hydrophobic vinyl polymer. The method includes preparing a solution of the hydrophobic vinyl polymer in a polar nonaqueous solvent, such as 1-methyl-1-pyrrolidinone, in which the hydrophobic vinyl polymer is surface-active. The substrate then is treated with the solution under conditions sufficient to deposit the hydrophobic vinyl polymer on the substrate. The hydrophobic vinyl polymer may have readily hydrolyzable pendant groups which, upon hydrolysis thereof in an aqueous medium, will result in the formation of a hydrophilic vinyl polymer coating on the substrate. For example, the hydrophobic vinyl polymer may be poly(vinyl trifluoroacetate). Also provided are coated substrates, in which the substrate is a shaped article composed of a hydrophobic polymer. The shaped article may be, for example, a film, fiber, or nonwoven web.Type: GrantFiled: January 9, 1998Date of Patent: December 7, 1999Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Leonid Anthony Turkevich, David Lewis Myers, Gunilla Elsa Gillberg-LaForce
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Patent number: 5998028Abstract: Disclosed is a novel thermoplastic article having metallic wire, rod and/or bar embedded therein produced by applying heat and pressure to a laminate comprising, in order, (1) an upper sheet material, (2) metallic wire, rods or bars, and (3) a lower sheet material to produce a thermoplastic article having metallic wire, rod and/or bar embedded therein. The upper and lower sheet materials are formed from a copolyester having an inherent viscosity of 0.5 to 1.2 dL/g, when measured at 25.degree.C. using 0.Type: GrantFiled: June 12, 1998Date of Patent: December 7, 1999Assignee: Eastman Chemical CompanyInventors: Michael Dennis Eckart, Raymond Lynn Goodson
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Patent number: 5989646Abstract: Ropes made of plastic filaments are used extensively for fishing equipment such as nets and trawl bags, and it has been found that a wax impregnation of the ropes is advantageous in several respects. However, the presence of free wax on the rope surface is undesirable, and according to the invention this is avoided by moving the rope through an impregnation unit (1) comprising a warm wax bath, in such a controlled manner that the rope is only partially saturated, whereafter the rope is air heated at a temperature higher than the melting point of the wax in order for the free surface wax to penetrate into the rope surface.Type: GrantFiled: July 16, 1998Date of Patent: November 23, 1999Assignee: A/S N.P. UtzonInventor: Stig Brog.ang.rd Andersen
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Patent number: 5972499Abstract: A process and materials made by the process which includes a bicomponent fiber, made of a nonconductive first component, including a first fiber-forming polymer selected from the group consisting of polyethylene terephthalate, nylon 6, nylon 6,6, cellulose, polypropylene cellulose acetate, polyacrylonitrile and copolymers of polyacrylonitrile; a conductive second component, including carbon particles and a second fiber-forming polymer selected from the group consisting of polyethylene terephthalate, nylon 6, nylon 6,6, cellulose, polypropylene cellulose acetate, polyacrylonitrile and copolymers of polyacrylonitrile; and a conductive third component, including a polymer selected from the group consisting of polypyrrole and polyaniline, said polymer formed in situ and being interspersed among at least a portion of the carbon particles of the second component.Type: GrantFiled: June 4, 1997Date of Patent: October 26, 1999Assignee: Sterling Chemicals International, Inc.Inventors: Edgardo Rodriguez, John W. Lindsay, William E. Streetman
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Patent number: 5962627Abstract: It has been found that fibers which incorporate very good mechanical properties as well as very good adhesive properties can be made from an optically anisotropic spinning solution containing a mixture of a paraphenylene groups-containing, wholly aromatic polyamide component and another polyamide component if for the para-aromatic polyamide component full or partial use is made of copolymer in which 2,6-naphthylene units are present in addition to the paraphenylene units and the other polyamide component is an aliphatic polyamide. Preferably, the weight ratio of the para-aromatic polyamide component to the aliphatic polyamide component is 95:5 to 85:15. The aromatic copolyamide containing paraphenylene and 2,6-naphthylene is preferably obtained by polymerising paraphenylene diamine (PPD) and a stoichiometric amount of a mixture composed of terephthalic acid dichloride (TDC) and 2,6-naphthylene carboxylic acid dichloride (NDC) in a molar ratio TDC:NDC of 99:1 to 80:20.Type: GrantFiled: April 22, 1997Date of Patent: October 5, 1999Assignee: Akzo Nobel N.V.Inventors: Harm van der Werff, Johannes Marinus Surquin
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Patent number: 5958583Abstract: A coated ceramic has alumina as an amorphous residue from an alumina sol containing alumina powder or and, optionally, a high emittance powder. The alumina powder alters the rheology and wetting characteristics of the sol to aid in forming the residue and increases the alumina concentration (% solids) in the residue. The high emittance powder radiates heat out of the residue and away from the ceramic when the coated ceramic is heated, such as during orbital reentry.Type: GrantFiled: December 20, 1996Date of Patent: September 28, 1999Assignee: The Boeing CompanyInventors: Michael E. Rorabaugh, Charles W. Newquist, Juris Verzemnieks
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Patent number: 5925461Abstract: A water blocking composite for use in cables which includes an article selected from the group having one or more strengthening members and buffer tubes impregnated with or coated with a mixture of a thermoplastic resin and a water-swellable particulate material.Type: GrantFiled: May 23, 1995Date of Patent: July 20, 1999Assignee: Neptco, IncorporatedInventor: Stuart Paterson Fairgrieve
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Patent number: 5922830Abstract: A highly hygroscopic polyamide fiber formed from a polyamide compound containing a polyvinylpyrrolidone (in an amount of 3-15 wt %) which is synthesized in isopropyl alcohol as a solvent, contains pyrrolidone in an amount less than 0.1 wt %, and has a K-value of 20-70. This fiber contains pyrrolidone in an amount less than 0.1 wt % of the amount of polyvinylpyrrolidone. This fiber is characterized by a yellowness index lower than 10 before dyeing, a large difference between the maximum moisture absorptivity and the standard moisture absorptivity, and a low content of water-soluble components that are subject to leaching.Type: GrantFiled: March 25, 1997Date of Patent: July 13, 1999Assignee: Toray Industries, Inc.Inventors: Naoyuki Kinoshita, Tetsuya Katoh, Yumiko Sawai
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Patent number: 5904984Abstract: Liquid crystal thermoset epoxy resin is used as an electrical insulator on electrical conducting devices such as coils and transformers. The linear epoxy/mesogen/epoxy molecule of the liquid crystal thermoset epoxy resin results in a electrical insulator with a high degree of crystallinity. This results in an electrical insulator with mechanical and electrical properties suitable for use in high temperature, high stress environments.Type: GrantFiled: October 17, 1996Date of Patent: May 18, 1999Assignee: Siemens Westinghouse Power CorporationInventors: James D. B. Smith, Karl F. Schoch, Jr., Wei-Fang A. Su
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Patent number: 5897952Abstract: Temperature adaptable fibers are provided in which a polyol/glyoxal based crosslinking system is used to create a water-insoluble polyacetal coating. The formaldehyde release properties characteristic of methylolamide finishing agents is avoided. The non-catalytic reaction utilizes stoichimetric amounts of sulfonic acids to derivatize the polyols which in turn react with the glyoxal to form a water-insoluble polymer. The material also possesses improved properties relating to soil release, durable press, resistance to static charge, abrasion resistance, pilling resistance and water absorbency.Type: GrantFiled: April 3, 1992Date of Patent: April 27, 1999Assignee: The United States of America as represented by the Secretary of AgricultureInventors: Tyrone L. Vigo, Gary F. Danna, Joseph S. Bruno
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Patent number: 5882762Abstract: This invention relates to carpet yarn comprising a plurality of filaments of a thermoplastic polymer with a fluorochemical or non-fluorochemical hydrophilicity imparting compound dispersed within said filaments. In another aspect, the invention relates to a method of producing carpet yarn and to the use of the carpet yarn for the production of carpet having high soil resistance.Type: GrantFiled: February 27, 1997Date of Patent: March 16, 1999Assignee: Minnesota Mining and Manufacturing CompanyInventor: Bart Goeman
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Patent number: 5869182Abstract: A sewing thread comprising at least one precursor material of a product at its outer surface, which imparts a stitched connection produced with such a thread an increased adherence to the material to be sewn. Furthermore, the invention provides a sewing thread wherein the applied precursor material transforms to form a product which is capable of enlarging the outer diameter of the sewing thread, particularly in an aqueous environment. Furthermore, the invention provides a method for producing waterproof stitched connections.Type: GrantFiled: January 9, 1995Date of Patent: February 9, 1999Inventors: Gerd Ebert, Thomas Seitz, Werner Amler
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Patent number: 5851667Abstract: The invention relates to a process for production of a composite product which involves molding several materials of different natures, including an oriented-reinforcement material that is preimpregnated with resin, without the resin being injected separately after the other materials in the mold are assembled,in which the resin is a modified polyester-polyurethane that is formed by reacting:a first component that comprises (A) at least one polyisocyanatewith a second component that comprises:(a) at least one polyol polyester,(b) at least one ethylenically unsaturated monomer.Type: GrantFiled: February 7, 1996Date of Patent: December 22, 1998Assignee: Cray Valley S.A.Inventors: Yeong-Show Yang, Francette Porato, Serge Lequeux
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Patent number: 5804308Abstract: Provided is a cellulosic substrate which is impregnated with a polymeric binder, preferably a latex, and a metal containing fatty acid compound. The cellulosic substrate is excellently suited as cushion stock to be used as heat lag media in the manufacturing of circuit boards since it provides excellent heat dispersion and release properties.Type: GrantFiled: August 4, 1995Date of Patent: September 8, 1998Inventor: Richard C. McAllister
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Patent number: 5804316Abstract: A packing having a flexible core and a skin of expanded intercalated graphite with an adhesive layer, baked for a predetermined period at a predetermined temperature for reduced adhesive flowability while maintaining tack for holding the skin wrapped around the core of the packing and a method of manufacturing such packing.Type: GrantFiled: April 15, 1996Date of Patent: September 8, 1998Assignee: RM Engineered Products, Inc.Inventors: Steven M. Suggs, John Hawkins, Reid M. Meyer
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Patent number: 5798178Abstract: The invention relates to a carbon brush which is impregnated with a synthetic ester oil.Type: GrantFiled: September 8, 1994Date of Patent: August 25, 1998Assignee: Schunk Kohlenstofftechnik GmbHInventors: Rainer Sperling, Harald Friedrich, Gunter Schardt
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Patent number: 5780576Abstract: Thermoplastic molding materials containA) from 1 to 99% by weight of a partly aromatic copolyamide composed ofa.sub.1) from 30 to 44 mol % of units which are derived from terephthalic acid,a.sub.2) from 6 to 25 mol % of units which are derived from isophthalic acid,a.sub.3) from 43 to 49.5 mol % of units which are derived from hexamethylenediamine anda.sub.4) from 0.5 to 7 mol % of units which are derived from aliphatic cyclic diamines of 6 to 30 carbon atoms,the molar percentages of components a.sub.1) to a.sub.4) together giving 100%,B) from 1 to 99% by weight of a polyetherimide,C) from 0 to 30% by weight of a polymeric component having OH groups,D) from 0 to 60% by weight of fibrous or particulate fillers or mixtures thereof,E) from 0 to 40% by weight of rubber impact modifiers andF) from 0 to 40% by weight of conventional additives and processing assistants.Type: GrantFiled: April 12, 1996Date of Patent: July 14, 1998Assignee: BASF AktiengesellschaftInventors: Martin Weber, Herbert Fisch, Gunter Pipper, Axel Gottschalk
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Patent number: 5759225Abstract: Peat moss having water repellency when it is dry is used as culture soil by subjecting it to a water repellency preventing treatment. In addition, a seedling-growing peat board with few germs and impurities, being lightweight and easy to handle, and particularly suitable for use as bed soil of a seed bed, is provided. The culture soil contains peat moss which is water repellent when dry, and a water-absorbing clay adhered to the surface of the peat moss. This is accomplished by treating water to render it absorbable by peat moss, suspending a water-absorbing clay in the treated water, contacting the peat moss with the suspension to absorb the suspension onto the surface of the peat moss, and drying the peat moss.Type: GrantFiled: July 10, 1996Date of Patent: June 2, 1998Assignees: Tetsuya Tanoshima, Kawasho CorporationInventor: Tetsuya Tanoshima
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Patent number: 5760167Abstract: A copolyamide composition prepared from hexamethylene diamine and mixtures of adipic acid, terephthalic acid and isophthalic acid, has a melting point below 300.degree. C., a glass transition temperature between 100.degree. C. and 130.degree. C. and physical properties similar to nylon 66.Type: GrantFiled: November 15, 1995Date of Patent: June 2, 1998Assignee: Industrial Technology Research InstituteInventors: Wu-Bin Yuo, Chien-Shiun Liao, Wen-Jeng Lin, Li-Kuei Lin, Tien-San Lee, Szu-Yuan Chan
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Patent number: 5753369Abstract: A power transmission belt having a body with a length, inside, and outside, and laterally spaced side surfaces. The body has a compression section, with there being a plurality of fibers embedded in the compression section having a diameter of 0.7 to 0.9 denier.Type: GrantFiled: July 26, 1995Date of Patent: May 19, 1998Assignee: Mitsuboshi Belting Ltd.Inventors: Masahiko Kawashima, Koji Kitahama, Kyoichi Mishima
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Patent number: 5747137Abstract: A flexible, composite, thermoplastic filament, which contains continuous fibers, and which filament contains a flexible sheath of a thermoplastic polymer which coats a fiber bundle of fibers, which fiber bundle is impregnated with a thermoplastic powder, which is made of the same thermoplastic polymer coating the fiber bundle, wherein the filament has a substantially elliptical cross-section.Type: GrantFiled: November 6, 1995Date of Patent: May 5, 1998Assignees: Eniricerche S.p.A., Enichem S.p.A.Inventors: Domingo Cutolo, Erminio Zoppi
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Patent number: 5744575Abstract: An aromatic polyimide having a recurring unit of the formula (I): ##STR1## wherein Ar is a divalent aromatic group having one or two benzene rings which has a sulfonate group of --SO.sub.3 H, --SO.sub.3 M, and --SO.sub.3 N(L).sub.4 on the ring, wherein M is an alkali metal and L is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, is favorably employed in the form of a semipermeable film for gas separation.Type: GrantFiled: June 6, 1996Date of Patent: April 28, 1998Assignee: Ube Industries, Ltd.Inventors: Shunsuke Nakanishi, Kenji Ito, Yoshihiro Kusuki
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Patent number: 5731083Abstract: Carboxymethyl cellulose fiber having a degree of substitution of at least 0.1, preferably 0.2-0.5, carboxymethyl groups per glucose unit is derived from solvent-spun cellulose fiber, for example by reaction with a strong alkali and a monochloroacetate reagent. The fiber has an absorbency of at least 8 grams, usually at least 15 grams, 0.9% saline solution per gram of fibre and a tenacity of at least 10, usually at least 15, cN/tex. It can be used for absorbent personal products.Type: GrantFiled: December 6, 1995Date of Patent: March 24, 1998Assignee: Courtaulds PLCInventors: Hardev Singh Bahia, Jim Robert James
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Patent number: 5700556Abstract: In granules of fiber-reinforced thermoplastic material, a multiplicity of individual filaments of the reinforcing fiber (e.g. glass) are arranged in parallel in a matrix of the thermoplastic material (e.g. polypropylene). The fiber length corresponds to the granule length and is in the range from 3 mm to 8 mm. The melt viscosity of the thermoplastic material is above 100 Pa.s, the diameter of the granules (measured perpendicular to the fiber direction) is 1.7 to 5 mm and the ratio diameter:length of the granules is 0.4 to 1.66.Type: GrantFiled: June 7, 1995Date of Patent: December 23, 1997Assignee: Hoechst AktiengesellschaftInventors: Detlef Skaletz, Horst Heckel, Bruno Wagner, Joachim Heydweiller
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Patent number: 5698478Abstract: Disclosed herein is an ink-jet printing cloth which can be dyed with inks containing a reactive dye and is composed mainly of cellulose fiber, wherein the cloth contains 0.1 to 50% by weight of a cationic substance, 0.01 to 5% by weight of an alkaline substance and 0.01 to 20% by weight of the ammonium salt of a polyvalent acid, the proportions of said cationic and alkaline substances and said ammonium salt being based on the dry weight of the cloth.Type: GrantFiled: October 24, 1995Date of Patent: December 16, 1997Assignee: Canon Kabushiki KaishaInventors: Tomoya Yamamoto, Masahiro Haruta, Shoji Koike, Koromo Shirota, Aya Yoshihira, Mariko Suzuki
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Patent number: 5686559Abstract: A poly(imide amic ester) having repeating unit of formula (I) and a process for the preparation thereof are provided, wherein formula (I) has the structure ##STR1## wherein Ar is, ##STR2## Ar' is, ##STR3## Ar" is ##STR4## R is selected from the group consisting of CH.sub.3, CH.sub.2 CH.sub.3, CH(CH.sub.3).sub.2, CH.sub.2 CH.sub.2 CH.sub.3, CH.sub.2 (CH(CH.sub.3).sub.2 and C(CH.sub.3).sub.3. Further, processes for the preparation of polyimide, polyimide film and polyimide fiber using the above poly(imide amic ester) are provided.Type: GrantFiled: October 30, 1995Date of Patent: November 11, 1997Assignee: Korea Research Institute of Chemical TechnologyInventors: Suh Bong Rhee, Myong Hoon Lee, Ji Woong Park
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Patent number: 5646234Abstract: A process for producing fibers or films by the steps of:a) preparing an aromatic polyamide by polycondensation of dicarbonyl dihalides or mixtures thereof with at least two diamines in N-alkyllactams as a solvent, the polycondensation being of at least 90 mol %, based on the total amount of dicarbonyl dihalides in the reaction mixture, of compounds of the formula I or mixtures of such compoundsHal--OC--Ar.sup.1 --CO--Hal (I)with at least 90 mol%, based on the total amount of diamines in the reaction mixture, of compounds of the formula II and optionally III or mixtures of such compoundsH.sub.2 N--Ar.sup.2 --NH.sub.2 (II), H.sub.2 N--Ar.sup.3 --NH.sub.2 (III)where Ar.sup.1, Ar.sup.2 and Ar.sup.Type: GrantFiled: April 4, 1995Date of Patent: July 8, 1997Assignee: Hoechst AGInventors: Holger Jung, Richard Neuert, Peter Klein, Georg-Emerich Miess
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Patent number: 5637387Abstract: The present invention relates to storage-stable advanced polymaleimide compositions and prepreg products manufactured therefrom comprising (A) an advanced polymaleimide reaction product resulting from the advancement reaction of a polyimide and an alkenyl phenol; and (B) a phenothiazine added to component (A) after advancement.Type: GrantFiled: June 2, 1995Date of Patent: June 10, 1997Assignee: Ciba-Geigy CorporationInventors: Benjamin G. Chin, Roger Tietze
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Patent number: 5622531Abstract: The present invention relates to a process for producing fibers or a textile product, in which fibers or textile products containing polyurethane fibers are dipped in a water-soluble wool protein solution to selectively adsorb a wool protein on the polyurethane fibers.Type: GrantFiled: October 13, 1995Date of Patent: April 22, 1997Assignees: Kurashiki Boseki Kabushiki Kaisha, Okamoto Corporation, Consumer Product End-Use Research Institute Co., Ltd.Inventors: Masaru Yamada, Kiyokazu Shuku, Toshio Hagihara
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Patent number: 5614309Abstract: A polypropylene or polyethylene film or fiber coated with a maleic-acid grafted polypropylene or polyethylene copolymer layer over which is coated a layer of selective polymer. The copolymer securely bonds the selective polymer to the film or fiber. These fibers and films can be used in fluid separation membranes.Type: GrantFiled: May 19, 1992Date of Patent: March 25, 1997Assignee: Hoechst Celanese Corp.Inventors: Tai-Shung Chung, Edward R. Kafchinski, Rachel S. Kohn, Frank J. Onorato, Jr.