From Sulfur-containing Reactant Patents (Class 524/609)
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Patent number: 6187858Abstract: A composition comprising: (a) polyethylene; (b) as a first antioxidant, a thiobisphenol; (c) as a second antioxidant, a compound containing 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate in the molecule; (d) as a third antioxidant, distearyl thiodipropionate; and (e) an organic peroxide, with the proviso that each antioxidant is present in an amount of about 0.01 to the about 0.2 part by weight and the organic peroxide is present in an amount of about 0.5 to about 3 parts by weight, all per 100 parts by weight of polyethylene.Type: GrantFiled: April 16, 1999Date of Patent: February 13, 2001Assignee: Nippon Unicar Company LimitedInventors: Takeshi Tachikawa, Koji Ishihara, Ariyoshi Ohki
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Patent number: 6166172Abstract: A method of forming a regioregular polythiophene from a polymerization reaction is described. The method proceeds by combining a soluble thiophene having at least two leaving groups with an organomagnesium reagent to form a regiochemical isomer intermediate, and adding thereto an effective amount of Ni(II) catalyst to initiate the polymerization reaction.Type: GrantFiled: February 10, 1999Date of Patent: December 26, 2000Assignee: Carnegie Mellon UniversityInventors: Richard D. McCullough, Robert S. Loewe
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Patent number: 6136884Abstract: A latex composition for hair care containing a hybrid-graft copolymer of a sulfopolyester and an acid-functional polymer segment. The acid-functional polymer segment is formed from at least one acid-functional monomer, at least one ethylenically unsaturated monomer, and at least one amide-containing monomer. Such compositions exhibit superior curl retention even at high humidity.Type: GrantFiled: January 30, 1998Date of Patent: October 24, 2000Assignee: Eastman Chemical CompanyInventors: Robert Gow-Sheng Chen, Phillip Michael Cook
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Patent number: 6130289Abstract: An aqueous phenolic resin dispersion that includes an aqueous continuous phase and, dispersed within the aqueous phase, the reaction product of a phenolic resin precursor and a modifying agent wherein the modifying agent includes at least one ionic group and at least one functional moiety that enables the modifying agent to undergo condensation with the phenolic resin precursor. The resulting dispersed phenolic resin reaction product includes at least one phenolic ring to which is bound the ionic group from the modifying agent. The pendant ionic group is a sulfate, sulfonate, sulfinate, sulfenate or oxysulfonate and the reaction-enabling moiety preferably is a hydroxy or hydroxyalkyl.Type: GrantFiled: January 22, 1999Date of Patent: October 10, 2000Assignee: Lord CorporationInventor: Helmut W. Kucera
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Patent number: 6124382Abstract: The invention concerns the use as thermothickeners of multi-block copolymers of general formula (I) or (II): ##STR1## wherein E designates a polyoxyalkylene sequence; A designates a water-soluble polymer sequence; X is a sulphur or oxygen atom; Y is an oxygen atom or an --N--R' group, R' being a linear or branched alkyl; R is a linear or branched alkyl, aralky or alkylaryl group; and n is such that the molecular mass of the multi-block copolymers Mp is greater than 250,000 g/mol.Type: GrantFiled: September 8, 1998Date of Patent: September 26, 2000Assignee: Rhodia ChimieInventors: Pascale Corpart, Herve Adam, Dominique Charmot
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Patent number: 6124390Abstract: An aromatic polysulfone resin composition contains 100 parts by weight of an aromatic polysulfone resin and 0.001-50 parts by weight of at least one compound selected from oxides, peroxides, double oxides and carbonates of a metal belonging to the Group IA or IIA in the periodic table of elements and having a water absorption of 2% or less.Type: GrantFiled: February 12, 1996Date of Patent: September 26, 2000Assignee: Sumitomo Chemical Company, LimitedInventors: Tohru Nagashima, Hideo Nomura
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Patent number: 6121353Abstract: A polymer alloy comprising ETFE having a melting point of at most 250.degree. C. and a melt flow rate of at least 20 at 297.degree. C., PPS and a compatibilizer (such as 3-aminopropyltriethoxysilane).Type: GrantFiled: July 14, 1998Date of Patent: September 19, 2000Assignee: Asahi Glass Company Ltd.Inventors: Masao Umino, Yasuki Miura, Masataka Yokota
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Patent number: 6117960Abstract: The invention concerns water-soluble cross-linkable copolymers having a molecular weight of .ltoreq.500000 and comprising a) between 20 and 95 wt. % sulphonic-acid- or sulphonate-group-containing monomer units; b) between 4 and 80 wt. % N-methylol- or N-alkoxymethyl-group containing monomer units; and c) between 0.1 and 20 wt. % hydrophobic monomer units selected from the group comprising water-insoluble ethylenically unsaturated compounds and hydrophobic end groups of initiator radicals or regulator molecules, the portions in wt. % being relative to the total weight of the copolymer. The portion of sulphonic-acid- or sulphonate-group-containing monomer units can optionally be substituted by up to 50 wt. %, relative to the portion by weight of monomer units a), by carboxyl-group-containing monomer units d) or amide-group-containing monomer units e).Type: GrantFiled: September 4, 1998Date of Patent: September 12, 2000Assignee: Wacker-Chemie GmbHInventors: Klaus Kohlhammer, Gerhard Koegler, Peter Ball, Monika Rockinger, Walter Dobler
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Patent number: 6103798Abstract: Thermoplastic compositions are provided containing a saturated hydrocarbon amine oxide and stabilizer compositions are provided containing a saturated hydrocarbon amine oxide and a second stabilizer. The thermoplastic compositions exhibit good melt flow rate stability during processing and are useful for making molded and extruded articles. The stabilizer compositions are useful for addition to thermoplastics for the stabilization thereof. A method is also provided for stabilizing thermoplastic compositions and involves admixing a hydrocarbon amine oxide with a thermoplastic resin. The saturated hydrocarbon amine oxides are preferably trialkyl amine oxides. The thermoplastic resin is preferably a polyolefin resin.Type: GrantFiled: May 26, 1998Date of Patent: August 15, 2000Assignee: General Electric CompanyInventors: Vaikunth S. Prabhu, Roger W. Avakian
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Patent number: 6100327Abstract: Polymeric coating systems comprising an oxidized polyarylene sulfide, especially polyarylene sulfone or partially oxidized polyarylene sulfide, are of improved abrasion resistance. The coating systems preferably comprise a polymer, a binder resin and oxidized polyarylene sulfide, and are suspended in a liquid vehicle. The coating systems are used for coating the surface of metallic and nonmetallic substrates.Type: GrantFiled: October 16, 1998Date of Patent: August 8, 2000Assignee: Ticona GmbHInventor: Helmut Scheckenbach
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Patent number: 6057393Abstract: Disclosed herein is a sulfide polymer composition for a sliding member, comprising:3-40 wt % of polyethylene tetrafluoride having a three-dimensional network structure forming-ability,5-40 wt % of granulated polyethylene tetrafluoride having a number average molecular weight of from not less than 2,000 to less than 300,000,0.1-15 wt % of a phosphate(s), andthe balance of a sulfide polymer; anda sliding member obtained therefrom.Type: GrantFiled: September 12, 1994Date of Patent: May 2, 2000Assignee: Oiles CorporationInventor: Kazuo Hirai
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Patent number: 6020420Abstract: This invention provides crystalline, water-dispersible polyesters comprising residues of 4,4'-biphenyl dicarboxylic acid. The polyesters comprise residues of 4,4'-biphenyl dicarboxylic acid, at least one difunctional sulfomonomer in an amount sufficient to provide water dispersibility to the polyester, and a glycol or a mixture of glycols. The polyesters of the invention are useful in ink and adhesive compositions.Type: GrantFiled: March 10, 1999Date of Patent: February 1, 2000Assignee: Eastman Chemical CompanyInventor: Scott Ellery George
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Patent number: 5965663Abstract: A resin composition comprising (a) polyarylene polyether represented by the general formula of Z.sub.1 -(polyarylene polyether) chain-Z.sub.1 ' (wherein Z.sub.1 and Z.sub.1 ' denote individually a monovalent organic group containing a cross-linkable unsaturated carbon-carbon linkage), and (b) an inorganic filler.Type: GrantFiled: May 24, 1996Date of Patent: October 12, 1999Assignee: Kabushiki Kaisha ToshibaInventor: Rumiko Hayase
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Patent number: 5962630Abstract: A method of encapsulating mixed waste in which a thermoplastic polymer having a melting temperature less than about 150.degree. C. and sulfur and mixed waste are mixed at an elevated temperature not greater than about 200.degree. C. and mixed for a time sufficient to intimately mix the constituents, and then cooled to a solid. The resulting solid is also disclosed.Type: GrantFiled: December 3, 1997Date of Patent: October 5, 1999Assignee: The United States of America as represented by the United States Department of EnergyInventors: Michael H. O'Brien, Arnold W. Erickson
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Patent number: 5925182Abstract: A stable liquid suspension composition comprising a liquid carrier, a solid fatty acid or a salt thereof, and a solid particulate is disclosed wherein said liquid carrier is selected from the group consisting of oils, olefins, terpenes, glycols, esters, ethers, alcohols, and combinations of any two or more thereof and said liquid carrier, solid fatty acid or salt thereof, and solid particulate are each present in said composition in a stabilizing amount sufficient to produce a stable liquid suspension. Also disclosed is a stable liquid composition comprising a liquid carrier, an oil-soluble polymer, and a solid particulate wherein said liquid carrier is selected from the group consisting of olefins, terpenes, esters, and combinations of any two or more thereof and said liquid carrier, oil-soluble polymer, and solid particulate are each present in said composition in a stabilizing amount sufficient to effect the formation of a stable liquid suspension.Type: GrantFiled: July 16, 1998Date of Patent: July 20, 1999Assignee: Phillips Petroleum CompanyInventors: Bharat B. Patel, Marshall D. Bishop
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Patent number: 5908583Abstract: The invention relates to a semiconducting polymer and a method of preparing a semiconducting polymer. The polymer in accordance with the invention has the repeating unit (--A--NH--B--S--), wherein A and B are conjugated groups. The polymer proves to be readily soluble already in customary organic solvents, without the groups A and B having been provided with saturated substituents, and, after doping, has an electric conductivity of approximately 1 S/cm. The method yields semiconducting polymers in accordance with the invention, which have a high molecular weight and few topological defects.Type: GrantFiled: June 30, 1997Date of Patent: June 1, 1999Assignee: U.S. Philips CorporationInventors: Edsko E. Havinga, Klaus A. Mullen, Thomas Soczka-Guth
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Patent number: 5863981Abstract: A self-doped conducting polymer having along its backbone a .pi.-electron conjugated system which comprises a plurality of monomer units, between about 0.01 and 100 mole % of the units having covalently linked thereto at least one Bronsted acid group. The conductive zwitterionic polymer is also provided, as are monomers useful in the preparation of the polymer and electrodes comprising the polymer.Type: GrantFiled: March 23, 1995Date of Patent: January 26, 1999Assignee: The Regents of the University of CaliforniaInventors: Fred Wudl, Alan Heeger
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Patent number: 5837765Abstract: A phenol resin molding compound which comprises phenol resin, a curing agent for the phenol resin, hydrogenated NBR, chopped strands of glass fibers and powdery glass fibers having a length of about 10 to about 200 .mu.m has a considerably improved elongation and an elevated safely factor from cracking without any substantial lowering of the modulus of tensile elasticity.Type: GrantFiled: November 4, 1996Date of Patent: November 17, 1998Assignee: NOK, CorporationInventor: Yuji Kudoh
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Patent number: 5834536Abstract: The invention relates to a process for producing immobilized polysulphide silanes, characterized by the conversion of a halogenated alkyl silane (A), optionally in the presence of a further organic halogen compound (B), with a polysulphide (C) in the presence of water and an inorganic or organic carrier material, wherein the content of the carrier material in the (dried and water-insoluble) end product is 20 to 99.5 wt. %.The immobilized polysulphide silanes are used for producing rubber mixtures and vulcanisates, particularly for tires, which have a low rolling resistance and an enhanced thermal load capacity.Type: GrantFiled: August 7, 1996Date of Patent: November 10, 1998Assignee: Bayer AGInventor: Thomas Scholl
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Patent number: 5824767Abstract: A process for improving the processability of poly(arylene sulfide) in melt spinning operations by treatment with a barium-containing compound and, optionally, a lubricant is disclosed.Type: GrantFiled: July 8, 1996Date of Patent: October 20, 1998Assignee: Hoechst Celanese CorporationInventors: Balaram B. Gupta, Andrew B. Auerbach, Barrie L. Davies
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Patent number: 5824402Abstract: An aromatic polyether contains within its chain the repeat units--Ph--CO--Ph-- I--?Ph--SO.sub.2 --Ph!n-- IIat a molar ratio I/II in the range 98:2 to 80:20 where Ph represents paraphenylene; the repeat units are linked through ether oxygen; and n is at least 1.1.It can be made by reacting together hydroxy and halogeno aromatic compounds corresponding to units I and II and to any minor units that are to be present. The reactants can be provided at least partly by a polymer containing an ether-linked succession of the units.Type: GrantFiled: June 7, 1995Date of Patent: October 20, 1998Assignee: Victrex Manufacturing Ltd.Inventors: David John Kemmish, Alan Branford Newton, Philip Anthony Staniland
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Patent number: 5795920Abstract: A polymeric dope solution comprising a polymeric material and a mixed solvent as a solvent system for use in the preparation of an integrally skinned asymmetric membrane having a surface layer (selective surface layer) and a porous support layer, which is useful as a gas separation membrane, is disclosed. Also disclosed are a process for the preparation of the asymmetric membrane using the polymeric dope solution, and an integrally skinned dope solution prepared thereby.The asymmetric membranes according to the present invention show good gas permeability and high permselectivity.Type: GrantFiled: June 21, 1996Date of Patent: August 18, 1998Assignee: Korea Institute of Science and TechnologyInventors: Yong Soo Kang, Bumsuk Jung, Un Young Kim
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Patent number: 5767186Abstract: Compositions for a tip seal for a scroll type compressor are proposed which are low in friction coefficient, high fluidity in a molten state and highly durable in a compressor using a substitute Freon. The composition comprises 2-10 wt % of fluororesin, 5-20 wt % of carbon fiber, and 75-93 wt % of polyphenylene sulfide resin containing 90 mol % or more of a repeating unit represented by the formula: ##STR1## The composition has a melt viscosity of 1200-3000 poise. Also, a method of manufacturing a plurality of such tip seals simultaneously is proposed.Type: GrantFiled: May 8, 1997Date of Patent: June 16, 1998Assignee: NTN CorporationInventors: Takumi Shimokusuzono, Jiro Matsumoto
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Patent number: 5750605Abstract: A hot melt adhesive composition comprising(i) 10 to 90% by weight of a sulfonated polyester condensation polymer;(ii) 0 to 80% by weight of a compatible tackifier;(iii) 0 to 40% by weight of a compatible plasticizer;(iv) 5 to 40% by weight of a compatible wax diluent with a molecular weight below 500 g/mole containing at least one polar functional group, said group being present at a concentration greater than 3.times.10.sup.-3 equivalents per gram;(v) 0 to 60% by weight of a compatible crystalline thermoplastic polymer; and(vi) 0 to 3% by weight of a stabilizer,the total of (i)-(vi) to equal 100% by weight.Type: GrantFiled: May 23, 1996Date of Patent: May 12, 1998Assignee: National Starch and Chemical Investment Holding CorporationInventors: Mitchell J. Blumenthal, Matthew L. Sharak, Charles W. Paul
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Patent number: 5736607Abstract: A semiconductor die is packaged in a hermetically sealed ceramic dual in-line package (cerdip) with a non-standard polysulfone film, or with a paste made from the film, as a die attach material. A cerdip process heats to temperatures of at least about 380.degree. C. The paste is produced by dissolving the film with NMP or with a blend including NMP, and adding a thixotropic agent. The paste or film forms a bond in a cerdip with less than 5000 ppm moisture without using a getter.Type: GrantFiled: June 5, 1995Date of Patent: April 7, 1998Assignee: Analog Devices, Inc.Inventors: John R. Martin, Peter W. Farrell
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Patent number: 5733962Abstract: A polyarylene sulfide resin composition comprising as major components: (A) 100 parts by weight of a polyarylene sulfide resin; (B) 200-30 parts by weight of mica; (C) 150-30 parts by weight of carbon fiber; and (D) 30-0.5 parts by weight of conductive carbon black. Various parts with stable conductivity and high dimensional precision can be produced from this resin composition by one molding operation.Type: GrantFiled: April 15, 1996Date of Patent: March 31, 1998Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yasuhiro Osako, Tomoyoshi Murakami
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Patent number: 5726232Abstract: A heat-resistant, lubricative resin composition which is low in friction and wear-resistant, and which is less likely to attack a soft alloy such as aluminum alloy, and a heat-resistant sliding bearing formed from such resin composition. Such heat-resistant, lubricative resin composition, adapted to be brought into sliding contact with a mating member made of an aluminum alloy, may be composed of 35-74% by weight of at least one heat-resistant thermoplastic resin selected from the group consisting of polyphenylene sulfide resins, thermoplastic polyimide resins having predetermined repeating units, polyether ketone resins, polycyanoarylether resins, polyamide-imide resins, polyether imide resins, polyether sulfonic resins, 10-45% by weight of a tetrafluoroethylene resin, and 16-30% by weight of lithium phosphate.Type: GrantFiled: August 28, 1996Date of Patent: March 10, 1998Assignee: NTN CorporationInventors: Masaki Egami, Hideyuki Tsutsui
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Patent number: 5710205Abstract: A wear-resistant solid fluoropolymer composition, e.g. of homo- and copolymers of tetrafluoroethylene (TFE), which has an extremely low coefficient of friction in dry sliding contact with metal, without the application of additional fluid lubricant, which composition comprises: a) a fluoropolymer, b) a poly(arylene sulphide) and c) another high aromatic polymer; and a process for preparing the foregoing solid fluoropolymer composition.Type: GrantFiled: March 19, 1996Date of Patent: January 20, 1998Assignee: Imperial Chemical Industries PLCInventors: Mark Davies, Paul Martin Hatton
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Inorganic filler, manufacturing method thereof, and resin composition containing an inorganic filler
Patent number: 5705540Abstract: Disclosed is a resin composition excellent in mechanical and electrical properties. The composition contains an inorganic filler such as fused silica or silicon nitride having the surface covered with a substance resulting from decomposition of a polysilane compound and a base resin such as an epoxy resin or a maleimide resin.Type: GrantFiled: January 10, 1997Date of Patent: January 6, 1998Assignee: Kabushiki Kaisha ToshibaInventors: Ken Uchida, Yasuyuki Hotta, Shuzi Hayase -
Patent number: 5705550Abstract: A polyarylene sulfide resin composition is improved in mold releasing characteristics in molding, is thermally and chemically stable, evolves little decomposition gases and exhibits excellent mechanical characteristics. The composition can be prepared by blending (A) 100 parts by weight of a polyarylene sulfide resin with (B) 0.01 to 5 parts by weight of an ester compound composed of a polybasic aliphatic carboxylic acid and a monohydric aliphatic alcohol.Type: GrantFiled: August 22, 1996Date of Patent: January 6, 1998Assignee: Polyplastics Co., Ltd.Inventor: Nozomu Nakagawa
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Patent number: 5698626Abstract: Disclosed is a process for producing water-dispersible polymers, particularly condensation polymers such as polyesters, and polyamides, by sulfonating an ethylenically unsaturated monomeric precursor and then condensation polymerizing the sulfonated precursor with a second monomer.Type: GrantFiled: December 18, 1996Date of Patent: December 16, 1997Assignee: Witco CorporationInventor: Wally L. Chang
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Patent number: 5695869Abstract: Melt-blown microfiber webs are prepared from polyarylene sulfide polymers, particularly polyphenylene sulfide. A small amount of a phosphite or phosphonite compound is added to the extruder feedstock. The additive essentially eliminates spurious polymer particle formation at the extruder die openings, even over sustained production periods. The polyarylene sulfide microfiber webs so produced are thus essentially free of spurious particulates, and the web defects which may be caused by such particulates.Type: GrantFiled: August 21, 1995Date of Patent: December 9, 1997Assignee: Hoechst Celanese CorporationInventors: Andrew Bernard Auerbach, Warren Stephen Harmon
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Patent number: 5677374Abstract: The invention relates to a polymer dispersion, by means of which the rheological properties and structure of various liquid and flowing mixtures may be adjusted. The dispersion is prepared by radical polymerizing, into a water soluble chain backbone polymer or into such a polymer brought water soluble, in a water solution at least one .alpha.-, .beta.-unsaturated carboxyl acid containing 3-8 carbons as well as at least one to a limited amount unsaturated monomer. The chain backbone polymer is preferably a starch derivative.Type: GrantFiled: June 20, 1996Date of Patent: October 14, 1997Assignee: Raisio Chemicals OyInventors: Antti Hamunen, Mika Anttila, Kari Nurmi
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Patent number: 5670569Abstract: Mixtures comprising polyarylene sulfides and polyarylene sulfoxides or partially oxidized polyarylene sulfides containing sulfoxide groups can be thermally crosslinked in a targeted manner depending on sulfoxide content. A process for producing crosslinked polyarylene sulfide moldings is based on the use of the mixtures in the thermal shaping.Type: GrantFiled: December 22, 1995Date of Patent: September 23, 1997Assignee: Hoechst AktiengesellschaftInventors: Helmut Scheckenbach, Andreas Schleicher
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Patent number: 5652287Abstract: A resin composition which comprises:(A) from about 99.5 to about 70 percent by weight, based on the total weight of components (A) and (B), of a poly(arylene sulfide) having a melt viscosity of from about 300 to about 8,000 poise at 1,200 sec.sup.-1 and 310.degree. C.;(B) from about 0.5 to about 30 percent by weight, based on the total weight of components (A) and (B), of a substantially non-functionalized, emulsion cured silicone rubber which is the condensation product of (i) an organopolysiloxane having at least two active hydrogen functional groups per molecule, and (ii) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms per molecule, said silicone rubber being melt dispersable with the poly(arylene sulfide); and(C) from about 0.1 to about 2.0 parts by weight, based on 100 parts by weight of components (A), (B) and (C) combined, of an aminosilane, wherein said composition has been prepared by combining components B and C with component A in the absence of a dispersion medium.Type: GrantFiled: April 10, 1996Date of Patent: July 29, 1997Assignee: Hoechst Celanese CorporationInventors: Vincent J. Sullivan, Andrew B. Auerbach
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Patent number: 5650459Abstract: A poly(arylene sulfide) resin composition comprising in admixture a poly(arylene sulfide) resin and at least one nickel compound selected from the group consisting of (a) nickel carbonates, (b) nickel hydroxide, (c) organic carboxylates of nickel and (d) nickel oxide is provided. According to the resin composition of the invention, the metal corrosiveness of the poly(arylene sulfide) resin upon and after its molding or forming is sufficiently inhibited without deteriorating the excellent heat resistance, mechanical properties, processability and the like inherent in the resin.Type: GrantFiled: March 1, 1995Date of Patent: July 22, 1997Assignee: Kureha Kagaku Kogyo K.K.Inventors: Yoshikatsu Satake, Toshihiko Ono
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Patent number: 5646202Abstract: A molding composition comprising(A) from 20 to 80% by weight of at least one polyarylene sulfide,(B) from 1 to 60% by weight of at least one mineral filler,(C) from 1 to 65% by weight of at least one surface-modified mineral filler and(D) from 0.01 to 0.4% by weight of at least one saturated, long-chain carboxylic ester,can be injection-molded or extruded to give moldings which have high surface quality and isotropic property behavior. Metallization of the moldings proves to be durable, which makes them suitable for use in lamps, in particular reflectors and electronic functional parts.Type: GrantFiled: June 21, 1996Date of Patent: July 8, 1997Assignee: Hoechst AktiengesellschaftInventors: Andreas Schleicher, Jan-Peter Piesold, Klaus Kohlhepp
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Patent number: 5625002Abstract: Disclosed are a polyphenylene sulfide composition having excellent impact characteristics, melt flow characteristics and flexibility which comprises, as indispensable components, (A) a polyphenylene sulfide, (B) an epoxy group-containing olefinic polymer, and (C) at least one elastomer selected from ethylene/propylene copolymers, ethylene/butene copolymers, ethylene/propylene/diene copolymers, hydrogenated styrene/butadiene/styrene block copolymers, copolymers of ethylene with a monomer selected from acrylic acid, methacrylic acid and alkyl esters and metal salts thereof, and polyamide elastomers; and a shaped article made from the polyphenylene sulfide composition.Type: GrantFiled: March 27, 1995Date of Patent: April 29, 1997Assignee: Toray Industries, Inc.Inventors: Sho Kadoi, Norio Shimasaki, Kazuhiko Kobayashi, Katuya Ohno
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Patent number: 5618873Abstract: A sliding member obtained by molding a resin composition comprising an aromatic polyamide fiber, a polytetrafluoroethylene, a lead oxide and at least one other heat resistant synthetic resin, the aromatic polyamide fiber being in a proportion of 10 to 30% by volume based on the total volume of the aromatic polyamide fiber, the polytetrafluoroethylene, the lead oxide and the other heat resistant synthetic resin, the polytetrafluoroethylene being in a proportion of 5 to 20% by volume based on the total volume, and the lead oxide being in a proportion of 0.1 to less than 5% by volume based on the total volume, and provided that the total of the aromatic polyamide fiber, the polytetrafluoroethylene, the lead oxide and the other heat resistant synthetic resin equals to 100% by volume.Type: GrantFiled: July 20, 1995Date of Patent: April 8, 1997Assignee: Daido Metal Company Ltd.Inventors: Tadashi Tanaka, Masaaki Sakamoto, Nobutaka Hiramatsu
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Patent number: 5614008Abstract: The present invention provides inks which contain a near infrared fluorophoric compound incorporated into a water-dissipatible polyester backbone. The inks of the present invention are preferably colorless or "invisible" but could be made slightly colored if desirable. Specifically, the inks of the present invention comprise:A. between about 1 and 10 weight percent of at least one water-dissipatable polyester having from about 0.1 ppm by weight to about 10% by weight of a thermally stable near infrared fluorophoric compound copolymerized therein;B. between about 5 and 75 weight percent of at least aliphatic humectant;C. between about 0 and 15 weight percent of at least one lower aliphatic alcohol of no more than 3 carbon atoms;D. water and optionally up to about 2 weight percent of one or more additives;wherein the weight percentages of components A-D equal 100%.Type: GrantFiled: October 23, 1995Date of Patent: March 25, 1997Inventors: Nelson Z. Escano, James J. Krutak, Sr.
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Patent number: 5612402Abstract: The invention relates to a curable polysulfide composition, which has an application in making a preserving coating, and an insulator in the field of road construction, house building, etc. The target of the invention is to obtain a stable polysulfide curable composition for which the cure rate and the cure velocity are independent of the surrounds, to allow the obtaining of vulcanized material with high grade of technical and ecological parameters, avoiding the typical unpleasant smell of mercaptane polysulfides and the toxicity of the curing agents, additives and fillers. The problems is solved using the following curable polysulfide composition: polysulfide polymer and/or copolymer containing up to 1 mol/kg SH groups, with molecular weight from 2,000 to 200,000, polysulfide degree from 2.2 to 4.0, ramification rate up to 4 mol percent and degree of polymerization of 20 to 500 in an amount of 90 to 110 pbw; modifier up to 75 pbw; curing agent from 0.Type: GrantFiled: January 23, 1995Date of Patent: March 18, 1997Inventors: Liliana S. Orecharova, Emil S. Vassev, Rossislav L. Orecharov, Petko L. Orecharov
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Patent number: 5611985Abstract: The present invention provides an improved solution casting method to manufacture, with high productivity, a polysulfone resin film superior in quality including appearance, surface smoothness, transparency and thickness accuracy. A polysulfone resin film is cast using the solution casting method in which a solution of polysulfone resin is cast on a support base to a desired thickness, dried to remove the solvent, and resultant resin film is peeled away from the support piece. The solution of polysulfone resin comprises at least one solvent chosen from among anisole, dioxane or tetrahydropyrane. To shorten the drying time even further, at least one solvent chosen from among acetone, methylethylketone, ethyl acetate, toluene and phenol can be mixed in the casting solution of polysulfone resin. The resultant polysulfone film obtained can be uniaxially stretched to produce a high-quality retardation film with superior optical properties.Type: GrantFiled: May 24, 1995Date of Patent: March 18, 1997Assignee: Sekisui Chemical Co., Ltd.Inventors: Hitoshi Kobayashi, Takao Saito
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Patent number: 5604287Abstract: A polyarylene sulfide resin composition comprising (A) a polyarylene sulfide resin, (B) silica, (C) (cl) a terpolymeric elastomer made from ethylene, an .alpha., .beta.-unsaturated carboxylate, and maleic acid anhydride and/or (c2) a graft composite elastomer which is a vinyl monomer grafted composite elastomer of polyorganosiloxane and alkyl (meth)acrylate, and (D) a mercaptosilane coupling agent, at a specific proportion. The composition exhibits superior mechanical strength and high fluidity and can be used effectively for sealing ICs and various electronic parts.Type: GrantFiled: November 17, 1995Date of Patent: February 18, 1997Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Shinobu Yamao
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Patent number: 5599864Abstract: A polyarylene sulfide resin composition having an excellent fluidability and a good moldability is disclosed. The resin composition is useful as a material for an optical pick-up part which has a high reliability and a high tenacity and does not generate deviation of an optical axis with changes in environmental conditions such as temperature and humidity. The polyarylene sulfide resin composition comprises, as main components, a polyarylene sulfide resin, a fibrous filler and a particulate filler, and, optionally, a silane coupling agent and an alicyclic hydrocarbon.Type: GrantFiled: October 3, 1994Date of Patent: February 4, 1997Assignees: Kabushiki Kaisha Sankyo Seiki Seisakusho, Shikoku Chemicals CorporationInventors: Shogo Ogawa, Hajime Hata, Ikuo Kasuga, Hiromasa Marumo, Masamichi Hayakawa
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Patent number: 5589524Abstract: A polyphenylene sulfide resin composition excellent in the fluidity and capable of producing a molded article excellent in the surface smoothness and the rigidity is disclosed, which comprises from 40 to 60% by weight of a polyphenylene sulfide resin having a melt viscosity of from 300 to 4000 poises, from 30 to 50% by weight of calcium carbonate having an average particle size of from 1 to 7 .mu.m, and from 8 to 25% by weight of mica having an average particles size of from 1 to 10 .mu.m. The light reflective molded article obtained by molding this composition which is excellent in the surface smoothness and the rigidity is also disclosed.Type: GrantFiled: July 25, 1995Date of Patent: December 31, 1996Assignee: Tosoh, CorporationInventors: Yasuhisa Ogita, Toshikazu Kato
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Patent number: 5578659Abstract: A polyarylene sulfide resin composition having excellent metal corrosion resistance and excellent mechanical properties is composed of 100 parts by weight of a polyarylene sulfide resin; from 0.1 to 10 parts by weight of a specific metal compound the surface of which has been pretreated with a first alkoxysilane compound; from 0 to 10 parts by weight of a second alkoxysilane compound; and from 5 to 500 parts by weight of an organic filler.Type: GrantFiled: June 23, 1995Date of Patent: November 26, 1996Assignee: Polyplastics Co., Ltd.Inventors: Sachio Anada, Nozomu Nakagawa, Kazutomo Tokushige, Toshikatsu Nitoh
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Patent number: 5578676Abstract: A composition and a method for forming an anti-reflective layer for DUV microlithographic processes is disclosed. The compositions of the present invention includes a polymer dissolved in a suitable solvent. The polymers are polysulfone and polyurea polymers which possess inherent light absorbing properties at deep ultraviolet wavelengths. In accordance with the method of the present invention, these compositions are applied to a substrate to form an anti-reflective coating, and thereafter a photoresist material that is compatible with the anti-reflective coating is applied.Type: GrantFiled: April 30, 1993Date of Patent: November 26, 1996Inventors: Tony Flaim, James Lamb, III, Kimberly A. Moeckli, Terry Brewer
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Patent number: 5569708Abstract: A self-doped conducting polymer having along its backbone a .pi.-electron conjugated system which comprises a plurality of monomer units, between about 0.01 and 100 mole % of the units having covalently linked thereto at least one Bronsted acid group. The conductive zwitterionic polymer is also provided, as are monomers useful in the preparation of the polymer and electrodes comprising the polymer.Type: GrantFiled: August 29, 1994Date of Patent: October 29, 1996Assignee: The Regents of the University of CaliforniaInventors: Fred Wudl, Alan Heeger
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Patent number: 5559179Abstract: A molding compound which comprises phenol resin or polyphenylenesulfide resin, chopped strands of glass fibers and powdery glass fibers having a length of about 10 to about 200 .mu.m is used suitably for molding a resin stator having an insert molded or post-inserted metallic outer race.Type: GrantFiled: November 10, 1994Date of Patent: September 24, 1996Assignee: NOK CorporationInventors: Shinji Mori, Katsutoshi Ishioka
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Patent number: 5548037Abstract: A process for preparing melt spun polymeric fiber made from polymerized amide monomers includes the steps of pigmenting the polymer, incorporating within the polymer sufficient SO.sub.3 H groups or salts thereof to give the polymer a sulphur content of between about 10 and about 160 equivalents per 10.sup.6 grams polymer and thereafter chemically blocking with a chemical blocking agent a portion of amino end groups present in the sulphonated polymer.Type: GrantFiled: May 22, 1995Date of Patent: August 20, 1996Assignee: BASF CorporationInventors: Matthew B. Hoyt, Andrew M. Coons, III, David N. Dickson