Contacting With Sulfur Or Phosphorus-containing Material Patents (Class 528/487)
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Patent number: 5496920Abstract: An increase in the molecular weight of newly produced polyamides and recycled polyamide materials can be achieved by heating to above the melting point or glass transition point and adding of a bismaleimide and a sterically hindered hydroxyphenyl-alkyl-phosphonic acid ester or half-ester.Type: GrantFiled: May 27, 1994Date of Patent: March 5, 1996Assignee: Ciba-Geigy CorporationInventors: Rudolf Pfaendner, Kurt Hoffmann, Heinz Herbst
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Patent number: 5496921Abstract: Polycarbonates are prepared by inducing the melt polycondensation of an aromatic dihydroxy compound and a diester carbonate in the presence of alkali metal compounds and/or alkaline earth metal compound droxy and adding to the polycarbonate which is the reaction product thereof: a sulfonic acid compound having the formula ##STR1## in an amount of 0.05-10 ppm, based on the polycarbonate, an epoxy compound in an amount of 1-2000 ppm, based on the polycarbonate and a phosphorus compound in an amount of 10-1000 ppm, based on the polycarbonate.Type: GrantFiled: October 24, 1994Date of Patent: March 5, 1996Assignee: GE Plastics JapanInventors: Takeshi Sakashita, Tomoaki Shimoda
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Patent number: 5491214Abstract: The color of hydrocarbon resins having carbon-carbon double bonds and containing color bodies is lightened by a hydrotreating process comprising contacting a resin having a weight average molecular weight Mw of 250-10,000 with hydrogen in the presence of a catalyst that promotes the hydrogenation of the color bodies without substantially changing the content of carbon-carbon double bonds in the resin. The preferred catalysts are copper chromite and copper/zinc.Type: GrantFiled: May 5, 1995Date of Patent: February 13, 1996Assignee: Hercules IncorporatedInventors: Norman E. Daughenbaugh, Dane G. Goodfellow
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Patent number: 5489400Abstract: A processable, electrically conductive polymer composition comprises a molecular complex made by template guided chemical polymerization and having a polyelectrolyte and a conductive polymer. A process of preparing a processable, electrically conductive polymer composition comprises the steps of oxidative polymerizing the monomers (abbreviated as AN) for a conductive polymer in the presence of a polyelectrolyte which serves first as a template (abbreviated as TEMP) that binds AN to form a template-(AN)n complex; and adding an oxidant to the template-(AN)n complex for conducting an oxidative polymerization to obtain a molecular complex of a polyelectrolyte and a conductive polymer.Type: GrantFiled: April 28, 1994Date of Patent: February 6, 1996Assignee: Industrial Technology Research InstituteInventors: Jia M. Liu, Linfeng Sun, Sze C. Yang
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Patent number: 5478921Abstract: A method for purifying a material containing a bioabsorbable polymer involves contacting the polymer with an extractant under supercritical conditions of temperature and pressure to extract residual impurities from the polymer and thereafter recovering the purified polymer. The method sharply reduces residual monomer levels in bioabsorbable polymers without altering polymer viscosity or melting point.Type: GrantFiled: August 25, 1994Date of Patent: December 26, 1995Assignee: United States Surgical CorporationInventors: Mark S. Roby, Nagabhushanam Totakura
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Patent number: 5470505Abstract: Polyanilines are provided that are soluble and that form crystaline solids upon precipitation. The solid polyanilines are electrically conductive, soluble, and can be fabricated into various shaped articles for use in, for example, batteries, electrodes, photovoltaic cells, semi-conductor devices and the like.Type: GrantFiled: February 25, 1993Date of Patent: November 28, 1995Assignee: Regents of the University of CaliforniaInventors: Paul Smith, Alan J. Heeger, Yong Cao, Jin-Chih Chiang, Alejandro Andreatta
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Patent number: 5414057Abstract: A process for the redistribution of an organic polycarbonate composition. The process involves melt equilibrating a starting polycarbonate composition (which may be a single polycarbonate or a mixture of polycarbonates, and may be or include recycled polycarbonate) having an initial weight average molecular weight in the presence of a carbonate redistribution catalyst and in the absence of branching agents, under conditions such that a redistributed polycarbonate composition is formed having a weight average molecular weight different from, and typically lower than, the initial weight.Type: GrantFiled: December 1, 1993Date of Patent: May 9, 1995Assignee: General Electric CompanyInventors: Allen J. Campbell, David M. Dardaris, Gary R. Faler, Patrick J. McCloskey, Thomas L. Evans
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Patent number: 5405933Abstract: The present invention provides copolymerized polycarbonates having improved flow and formability, in addition to excellent mechanical properties, heat resistance, transparency, and water resistance obtained by copolymerization of two or more aromatic dihydroxy compounds and a compound capable of reacting with those aromatic dihydroxy compounds to form carbonate linkages, characterized in that, of all the constituent repeating units derived from aromatic dihydroxy compounds, 2-40 mole % are derived from resorcin and/or substituted resorcins.Type: GrantFiled: September 9, 1993Date of Patent: April 11, 1995Assignee: General Electric CompanyInventors: Takeshi Sakashita, Tomoaki Shimoda, Takashi Nagai
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Patent number: 5401827Abstract: A semiconductive conjugated copolymer comprises at least two chemically different monomer units which, when existing in their individual homopolymer forms, have different semiconductor bandgaps. The proportion of said at least two chemically different monomer units in the copolymer is selected to control the semiconductor bandgap of the copolymer so as to control the optical properties of the copolymer. The copolymer is formed in a manner enabling it to be laid down as a film without substantially affecting the luminescent characteristics of the copolymer and is stable at operational temperature.The semiconductor bandgap may be spatially modulated so as to increase the quantum efficiency of the copolymer when excited to luminesce, to select the wavelength of radiation omitted during luminescence or to select the refractive index of the copolymer.Type: GrantFiled: August 22, 1991Date of Patent: March 28, 1995Assignee: Cambridge Display Technology LimitedInventors: Andrew Holmes, Donal D. Bradley, Richard H. Friend, Arno Kraft, Paul Burn, Adam Brown
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Patent number: 5399658Abstract: A gamma radiation-resistant polycarbonate-disulfide resin is disclosed. The incorporation of disulfide linkages in the structure of polycarbonate was found to enhance the resistance of the resin to the discoloration caused by exposure to gamma radiation. Accordingly, processes for the incorporation of disulfide linkages in the molecular backbone, as end-groups or as side chains are disclosed. The polycarbonate-disulfide resin may be used as a molding resin in the context of thermoplastic molding compositions as well as a stabilizing additive in polycarbonate resin.Type: GrantFiled: October 29, 1993Date of Patent: March 21, 1995Assignee: Miles Inc.Inventors: Rick L. Archey, Robert J. Kumpf, Aaron D. Meltzer, Harald Pielartzik
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Patent number: 5374709Abstract: A method for removing oligomers and non-polymeric impurities from poly(arylene sulfide) polymers and producing the polymers in easily recoverable granular form is provided in which a poly(arylene sulfide) polymer associated with oligomers and non-polymeric impurities is contacted with a solvent, water, and optionally, a base, at a sufficient temperature to substantially dissolve the polymer, oligomers and impurities; then the solution is cooled to a temperature at which the poly(arylene sulfide) precipitates while oligomers and impurities remain in solution, then the precipitated polymer is separated from the solution containing the oligomers and impurities. A polymer product produced by this method is also disclosed.Type: GrantFiled: October 23, 1992Date of Patent: December 20, 1994Assignee: Phillips Petroleum CompanyInventors: Earl Clark, Jr., Lacey E. Scoggins, Glenn F. Kile
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Patent number: 5371170Abstract: Polycarbonates are prepared by inducing the melt polycondensation of an aromatic dihydroxy compound and a diester carbonate in the presence of alkali metal compounds and/or alkaline earth metal compound droxy and adding to the polycarbonate which is the reaction product thereof: a sulfonic acid compound having the formula ##STR1## in an amount to 0.05-10 ppm, based on the polycarbonate, and also an epoxy compound in an amount of 1-2000 ppm, based on the polycarbonate.Type: GrantFiled: February 23, 1994Date of Patent: December 6, 1994Assignee: GE Plastics JapanInventors: Takeshi Sakashita, Tomoaki Shimoda
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Patent number: 5352768Abstract: A method is provided for producing a poly(arylene sulfide) polymer having reduced amounts of impurities by contacting a poly(arylene sulfide) polymerization reaction mixture with an acid.Type: GrantFiled: October 23, 1992Date of Patent: October 4, 1994Assignee: Phillips Petroleum CompanyInventors: John D. Stuber, Wei-Teh W. Shang, Lacey E. Scoggins
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Patent number: 5350834Abstract: Poly(arylene sulfide/sulfone) polymers are treated in order to increase melt stability and decrease impurities by contacting the poly(arylene sulfide/sulfone) polymer with a soluble zinc compound and an acidic solution. In one embodiment, the polymer is treated first with the soluble zinc compound, followed by treatment with the acidic solution. In another embodiment, the polymer is treated in one step with a solution comprising a water soluble zinc compound in an acidic solution.Type: GrantFiled: May 14, 1993Date of Patent: September 27, 1994Assignee: Phillips Petroleum CompanyInventors: Rex L. Bobsein, Michael C. Yu, Roy F. Wright, David A. Soules
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Patent number: 5349049Abstract: A method of production of polyvinyl chloride resin for paste processing comprises recovering in 98% or more the polyvinyl chloride resin from an aqueous dispersion of the polyvinyl chloride resin for paste processing as aggregates by adding an organic fluid which is at most barely soluble in water and does not dissolve or swell the polyvinyl chloride resin to the aqueous dispersion in the presence of an aggregating agent, followed by separating the aggregated polyvinyl chloride resin particles from the aqueous phase of the aqueous dispersion. By the addition of the aggregating agent, dispersion of the resin particles into a medium is improved, fluidity of a sol thereof and the physical properties of molded articles formed therefrom are improved and blocking during the drying process is prevented.Type: GrantFiled: March 31, 1993Date of Patent: September 20, 1994Assignee: Nippon Zeon Co., Ltd.Inventors: Masaaki Nishina, Osamu Ozaki
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Patent number: 5342539Abstract: Artionic water treatment polymers are obtained by reacting polyacrylamide and phosphorous acid.Type: GrantFiled: February 8, 1993Date of Patent: August 30, 1994Assignee: Diatec PolymersInventor: Leo E. Nagan
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Patent number: 5342854Abstract: A process is described for recycling polyester and cotton blend fabrics by separating the polyester from the cotton fabric. The novel process to recycle the polyester/cotton blend fabrics includes the steps of (a) providing a polyester and cotton blend fabric; (b) charging said blend into a sulfone solvent; (c) dissolving the polyester in the sulfone solvent; (d) separating the dissolved polyester and sulfone solvent solution from the cotton fabric; (e) filtering the cotton to obtain isolated, cotton fabric.Type: GrantFiled: July 28, 1993Date of Patent: August 30, 1994Assignee: Hoechst Celanese CorporationInventor: Susan L. Serad
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Patent number: 5336755Abstract: The invention relates to a process for the recovery of polymers dissolved in an aqueous alkaline or acid medium by precipitating the polymers with acid or alkaline precipitants, the precipitation being initiated in a strong aqueous flow and the precipitated polymers separated from the aqueous medium.Type: GrantFiled: January 27, 1993Date of Patent: August 9, 1994Assignee: Belland AGInventor: Richard F. Pape
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Patent number: 5334701Abstract: A method is provided for selectively extracting the lower molecular weight fraction of a poly(arylene sulfide) polymer by contacting the polymer with a polar organic compound and a promoter compound to form a less dense polymer-lean liquid phase and a more dense polymer-rich liquid phase, separating the polymer-lean liquid phase from the polymer-rich liquid phase, and recovering the polymer from the polymer-rich phase. Alternatively, either of the phases can be isolated and polar organic compound and optionally promoter can be added to form two new phases, followed by isolation of the new polymer-rich phase. This process can be repeated as often as desired or practicable in order to recover polymer having a desired molecular weight and/or molecular weight distribution.Type: GrantFiled: October 23, 1992Date of Patent: August 2, 1994Assignee: Phillips Petroleum CompanyInventors: Carlton E. Ash, Jon F. Geibel, Randy L. Hagenson, David A. Soules
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Patent number: 5331024Abstract: The invention relates to aqueous dispersions of plastics having a solids content of 30 to 70% by weight and a reduced formaldehyde content, based on polymers of one or more monomers from the group comprising acrylic acid esters, methacrylic acid esters, vinyl esters, olefins, vinyl halides, vinylaromatics and ethylenically unsaturated carboxylic acids and amides thereof, and a content of 0 to 10% by weight, based on the total weight of the polymer, of N-alkylamides and/or N-alkoxyalkylamides of ethylenically unsaturated carboxylic acids, wherein the dispersion contains 0.05 to 10% by weight, based on the polymer, of one or more peroxy compounds from the group comprising hydrogen peroxide, organic peroxides, perborates, percarbonates, persulfates and perphosphates.Type: GrantFiled: August 13, 1993Date of Patent: July 19, 1994Assignee: Wacker-Chemie GmbHInventors: Gerhard Brink, Konran A. Wierer
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Patent number: 5330601Abstract: Pretreatment of elastomer substrate surfaces with aqueous solutions of monopersulfate compound (MPS) and the improved adhesive bonds obtained between such pretreated substrate surfaces and other substrates.Type: GrantFiled: May 20, 1993Date of Patent: July 19, 1994Assignee: H.B. Fuller Licensing & Financing, Inc.Inventor: Peter Gottschalk
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Patent number: 5324815Abstract: A process for producing an electrically conductive organic polymer, which comprises subjecting an organic polymer having an imino-p-phenylene structural unit represented by the following formula ##STR1## as the main repeating unit to a doping treatment with a solution having dissolved therein a quinone series oxidizing agent together with a protonic acid.Type: GrantFiled: December 11, 1992Date of Patent: June 28, 1994Assignee: Nitto Denko CorporationInventors: Akira Ohtani, Masao Abe, Yoshihiro Uetani, Keisuike Kii
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Patent number: 5317043Abstract: Process for the recovery of polymers by dissolving in an aqueous alkaline or acid medium and precipitating in a strong, turbulent, aqueous flow with subsequent ripening of the precipitated particles in a laminar flow.Type: GrantFiled: July 26, 1991Date of Patent: May 31, 1994Assignee: Belland AGInventor: Michael Gass
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Patent number: 5306801Abstract: The present invention relates to a polycarbonate production method. More specifically, it relates to a polycarbonate production method that is capable of preparing polycarbonates which have excellent residence stability such as hue stability and heat stability at the time of molding, and which have particularly outstanding water resistance.Type: GrantFiled: June 24, 1992Date of Patent: April 26, 1994Assignee: GE Plastics Japan, Ltd.Inventors: Takeshi Sakashita, Tomoaki Shimoda
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Patent number: 5304335Abstract: Disclosed is a novel method for obtaining conductive polymers enabling their conductive to be increased and thermally stabilized. The polymers are obtained by oxidative chemical process in the presence of a codopant, the anions of which are more stable than the oxidating anions. The synthesis of the polymer is furthermore followed by a thermal treatment operation by which the conductivity of the material obtained is stabilized. Application: microwave absorbents.Type: GrantFiled: February 19, 1992Date of Patent: April 19, 1994Assignee: Thomson-CSFInventors: Olivier Sagnes, Philippe Michel
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Patent number: 5302696Abstract: This invention relates to a process for minimizing or reducing the amount of residual free hydrazine in polymer latices. The process is particularly useful in the manufacture of hydrogenated nitrile rubber which is resistant to oxidative degradation at high temperatures, as well as resistant to corrosive environments such as acid environments. Nitrile rubbers are useful in the manufacture of fan belts, seals, gaskets, and hoses in increasingly small and hot-running car engines.Type: GrantFiled: December 14, 1992Date of Patent: April 12, 1994Assignees: Olin Corporation, The Goodyear Tire and Rubber Co.Inventor: Henry W. Schiessl
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Patent number: 5281363Abstract: A electrically conductive polyaniline particle comprising a substituted or unsubstituted polyaniline doped with two or more dopants, at least one of said dopants predominating at or near the surface of said particles and at least one other dopant predominating at or near the core of said particle.Type: GrantFiled: April 22, 1991Date of Patent: January 25, 1994Assignee: Allied-Signal Inc.Inventors: Lawrence W. Shacklette, Granville G. Miller, Ronald L. Elsenbaumer, Chien-Chung Han, Bernhard M. WeBling, Bernhard Wessling
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Patent number: 5264626Abstract: Rapid recovery from waste of high molecular weight polyhydroxyacid content by depolymerizing the PHA in acidic water.Type: GrantFiled: November 22, 1991Date of Patent: November 23, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventors: Loren D. Brake, Narayanan S. Subramanian
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Patent number: 5260415Abstract: This invention relates to a process for the crosslinking of polymers containing diaryl ketone groups consisting of heating the polymer with an alcohol and/or alkoxide, and optionally exposing the polymer to a strong mineral acid. The crosslinked polymers have enhanced chemical resistance.Type: GrantFiled: March 12, 1992Date of Patent: November 9, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventor: Israel A. David
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Patent number: 5247066Abstract: A crosslinking additive for imparting water resistance to starch-based alkaline corrugating adhesive compositions is prepared by reacting acetone and formaldehyde under aqueous alkaline conditions at 20.degree.-80.degree. C. in a molar ratio of from 2 to 5 moles of formaldehyde per mole of acetone. The condensate is thereafter treated with from 1.0 to 2.0 moles of hydrogen peroxide per mole of unreacted formaldehyde which oxidizes the residual formaldehyde to formic acid. The treated crosslinking additive will contain less than 0.4% unreacted formaldehyde and may be added directly to a starch-based corrugating adhesive.Type: GrantFiled: August 29, 1991Date of Patent: September 21, 1993Assignee: National Starch and Chemical Investment Holding CorporationInventors: Jules E. Schoenberg, Michael Foran
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Patent number: 5240644Abstract: A method is provided for the preparation of a conductive composition containing a polymerized aromatic amine wherein the aromatic amine is oxidatively polymerized in an acidic aqueous medium in the presence of an oxidizing agent, a doping agent and an aromatic polyalkyleneoxide in an amount sufficient to stabilize the resulting composition. Preferably, the aromatic amine is aniline or a substituted aniline. Compositions produced by such method are also disclosed. These compositions are useful for treating various substrates to make such substrates conductive.Type: GrantFiled: December 4, 1991Date of Patent: August 31, 1993Assignee: Milliken Research CorporationInventors: Carey N. Barry, Jr., Hans H. Kuhn
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Patent number: 5237046Abstract: The invention relates to a process for stabilizing the molecular weight of high molecular weight, optionally branched polyarylene sulfides prepared by reaction of aromatic dihalogen compounds and, optionally, aromatic trihalogen or tetrahalogen compounds and, optionally, polymer-chain-terminating monomers with alkali metal sulfides and/or alkali metal hydrogen sulfides at elevated temperature in aprotic polar solvents, characterized in that, after the desired molecular weight has been reached, alkali metal sulfides and/or alkali metal hydrogen sulfides present in excess are at least partly reacted with acids to form the alkali metal salts of the acids and hydrogen sulfide.Type: GrantFiled: March 2, 1992Date of Patent: August 17, 1993Assignee: Bayer AktiengesellschaftInventors: Manfred Schmidt, Gabriel Denecker, Wolfgang Jakob, Wolfgang Arlt
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Patent number: 5235034Abstract: Poly(arylene sulfide/sulfone) polymers are treated in order to increase melt stability and decrease impurities by contacting the poly(arylene sulfide/sulfone) polymer with a soluble zinc compound and an acidic solution. In one embodiment, the polymer is treated first with the soluble zinc compound, followed by treatment with the acidic solution. In another embodiment, the polymer is treated in one step with a solution comprising a water soluble zinc compound in an acidic solution.Type: GrantFiled: May 6, 1991Date of Patent: August 10, 1993Assignee: Phillips Petroleum CompanyInventors: Rex L. Bobsein, Michael C. Yu, Roy F. Wright, David A. Soules
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Patent number: 5233000Abstract: Polymers of pyrrole or copolymers of pyrrole are obtained having high surface area and low conductivity. Such polymers and copolymers are useful in forming catalysts.Type: GrantFiled: July 18, 1990Date of Patent: August 3, 1993Assignee: The Lubrizol CorporationInventor: Richard Yodice
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Patent number: 5229488Abstract: An absorbent resin is produced by a method which comprises adding to 100 parts by weight of an absorbent resin powder an aqueous liquid containing 7 to 100 parts by weight of water and a reducing substance in the presence of 0.01 to 5 parts by weight of at least one additive selected from the group consisting of water-insoluble fine powders and surfactants. The absorbent resin thus produced excels in absorption properties and exhibits a low residual monomer content.Type: GrantFiled: September 4, 1990Date of Patent: July 20, 1993Assignee: Nippon Shokubai Kagaku Kogyo Co., Ltd.Inventors: Kinya Nagasuna, Katsuhiro Kajikawa, Takumi Hatsuda, Yoshio Irie, Teruaki Fujiwara
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Patent number: 5225493Abstract: A process for anionic polymerization of polymerizable monomers with an organo lithium initiator followed by polymerization termination characterized in that terminated reaction products are neutralized by contacting with sulfuric acid, phosphoric acid or a mixture thereof.Type: GrantFiled: August 26, 1992Date of Patent: July 6, 1993Assignee: The Dow Chemical CompanyInventors: Gary R. Marchand, Brian W. Walther, Warren R. Rose
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Patent number: 5225524Abstract: A process is described for rendering amino-group polymer solutions substantially odorless. In one embodiment, a solution of the terpolymer of vinyl pyrrolidone, vinyl caprolactam and dimethylaminoethyl methacrylate is treated with 0.1-10% by weight of an acidic compound or an acidic ion-exchange resin to render the solution substantially odorless. Other vinyl pyrrolidone polymer solutions in water and alcohol are treated similarly with equally effective results.Type: GrantFiled: July 2, 1992Date of Patent: July 6, 1993Assignee: ISP Investments Inc.Inventors: Krystyna Plochocka, Jenn S. Shih, Jui-Chang Chuang
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Patent number: 5216114Abstract: A method for sulfonating items comprising polybenzazole polymers is described. These sulfonated polybenzazole items are incorporated into composites containing a matrix resin such as an epoxy resin. The interfacial shear strength of these sulfonated polybenzazole fiber-containing composites is significantly improved over the interfacial shear strength of similar composites containing unsulfonated polybenzazole fibers.Type: GrantFiled: February 19, 1991Date of Patent: June 1, 1993Assignee: The Dow Chemical CompanyInventors: William E. Walles, Robert M. Nowak
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Patent number: 5175248Abstract: The residual level of N-vinylcarbazole in polyvinylcarbazole has been reduced to an amount less than 25 ppm by treatment of a solution of the polyvinylcarbazole with a strong acid. The polymer can be recovered in pure form by precipitation of the polymer from solution with a non-solvent.Type: GrantFiled: June 4, 1990Date of Patent: December 29, 1992Assignee: Sartomer Company, Inc.Inventors: C. Richard Costin, Thomas W. Hazell, Gary W. Ceska, James P. Horgan
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Patent number: 5173548Abstract: Epoxy-modified hydrocarbon resins of this invention are prepared by copolymerizing hydrocarbon olefins mainly consisting of aromatic olefins such as indene, styrene, and coumarone with phenols and epoxidizing the copolymers with epichlorohydrin and are useful as modifiers and base polymers for coatings, adhesives, rubbers, and IC encapsulants and also as raw materials for the compatibilizers for incompatible polymer systems because of their capability of undergoing crosslinking or grafting reactions with polymers having functional groups or chemical compositions reactive with the epoxy groups.Type: GrantFiled: August 7, 1989Date of Patent: December 22, 1992Assignee: Nippon Steel Chemical Co., Ltd.Inventor: Naoki Yokoyama
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Patent number: 5171791Abstract: A process for anionic polymerization of polymerizable monomers with an organo lithium initiator followed by polymerization termination characterized in that terminated reaction products are neutralized by contacting with sulfuric acid, phosphoric acid or a mixture thereof.Type: GrantFiled: May 9, 1990Date of Patent: December 15, 1992Assignee: The Dow Chemical CompanyInventors: Gary R. Marchand, Brian W. Walther, Warren R. Rose
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Patent number: 5171833Abstract: This invention relates to a process for minimizing or reducing the amount of residual free hydrazine in polymer latices. The process is particularly useful in the manufacture of hydrogenated nitrile rubber which is resistant to oxidative degradation at high temperatures, as well as resistant to corrosive environments such as acid environments. Nitrile rubbers are useful in the manufacture of fan belts, seals, gaskets, and hoses in increasingly small and hot-running car engines.Type: GrantFiled: March 4, 1991Date of Patent: December 15, 1992Assignee: Olin CorporationInventor: Henry W. Schiessl
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Patent number: 5147968Abstract: A composition for absorbing electromagnetic radiation (such as microwave, infrared, visible light radiation ultraviolet radiation), wherein said electromagnetic radiation possesses a wavelength generally in the range of from about 1000 Angstroms to about 50 meters, wherein said composition comprises a polyaniline composition of the formula ##STR1## where y can be equal to or greater than zero and R' and R.sub.2 are independently selected from the group consisting of --H, --OCH.sub.3, --CH.sub.3, --F, --Cl, --Br, --I, --NR.sup.3.sub.2, --NHCOR.sub.3, --OH, --O, --SR.sup.3, --OR.sup.3, --OCOR.sup.3, --NO.sub.2, --COOH, --COOR.sup.3, --COR.sup.3, --CHO, and --CN, where R.sup.3 is a C.sub.1 to C.sub.a alkyl, aryl or aralkyl group.Type: GrantFiled: September 23, 1991Date of Patent: September 15, 1992Assignee: The Ohio State University Research FoundationInventors: Arthur J. Epstein, John M. Ginder, Mitchell G. Roe, Hamid Hajiseyedjavadi
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Patent number: 5144005Abstract: Continuous process for removing unstable components from crude oxymethylene copolymer, which still contains catalysts, monomeric starting materials and unstable components, by treating the copolymer with deactivators, optionally in the presence of auxiliaries, in a pressure zone, and subsequently removing volatile components in a pressure-release zone in the presence or absence of stabilizers, in which process the crude polymer is fully melted in the absence of the deactivators and auxiliaries immediately after completion of the polymerization step, and the deactivators are subsequently incorporated, alone or together with auxiliaries, under pressure into the resultant polymer melt in at least one pressure zone.By this process, degradation is avoided and significantly better properties are obtained.Type: GrantFiled: February 4, 1988Date of Patent: September 1, 1992Assignee: Hoechst AktiengesellschaftInventors: Gunter Sextro, Karl-Friedrich Muck, Karlheinz Burg, Eberhard Fischer
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Patent number: 5137982Abstract: A method for removing odor from an aqueous solution of polymeric quaternary ammonium salt solution containing residual aliphatic tertiary amine and choline chloride or derivative thereof, said process comprising adding a sufficient amount of a non-volatile, stable, polybasic acid to react with said choline chloride or derivative thereof to prevent the formation of aliphatic tertiary amine from said choline chloride or derivative thereof. The present invention is also directed to a process for the preparation of recording film by treating as ethylene oxide neutralized conductive quaternary polymer solution with orthophosphoric acid and coating the treated solution directly onto a substrate.Type: GrantFiled: January 30, 1991Date of Patent: August 11, 1992Assignee: Graphics Technology International Inc.Inventor: Everett W. Bennett
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Patent number: 5137991Abstract: Self-prontonated sulfonic acid-substituted polyaniline compositions, processes for their preparation and uses therefor are disclosed. The sulfonated polyaniline compositions have faster electronic and optical responses to electrochemical potentials comparing to its parent polyaniline, improved environmental stability, and improved solubility than the parent polymer, polyaniline. A process for producing the sulfonated polyaniline compositions comprises reacting the polyaniline polymer with concentrated sulfuric acid. The sulfonated polyaniline compositions are useful for switching an electrochemical response between a conducting and a nonconducting state. The sulfonated polyaniline compositions are also useful for conduction of electricity, absorption of electromagnetic radiation, modulation of electromagnetic beams and modification of the electromagnetic response of sulfonated polyaniline compositions by chemical or electrochemical means.Type: GrantFiled: October 19, 1989Date of Patent: August 11, 1992Assignee: The Ohio State University Research FoundationInventors: Arthur J. Epstein, Jiang Yue
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Patent number: 5138025Abstract: A method for stabilizing molten diesters of naphthalenedicarboxylic acids and stabilized naphthalenedicarboxylic acid diester compositions are disclosed.Type: GrantFiled: August 30, 1990Date of Patent: August 11, 1992Assignee: Amoco CorporationInventor: Allen B. Mossman
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Patent number: 5130412Abstract: An electrically conducting self-doped carbazole polymer of the formula: ##STR1## wherein A is a bifunctional molecule capable of bonding to a positively charged molecule at one end and is capable of bonding to a flexible spacer group Z at another end, Z is a flexible spacer group capable of bonding to an anionic group A at one end and is capable of bonding either to a nitrogen or aromatic electron withdrawing or electron donating group at another end, E is a bifunctional molecule capable of bonding to nitrogen at one end and is capable of bonding to a flexible spacer group Z at anther end, X is a positively charged counterion, and n is at least 2.Type: GrantFiled: October 16, 1990Date of Patent: July 14, 1992Assignee: Southwest Research InstituteInventors: Stephen T. Wellinghoff, Charles K. Baker
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Patent number: 5118787Abstract: A method of modifying a synthetic resin comprises treating a solution or dispersion of the synthetic resin containing water-soluble electrolytes as impurities is treated with basic or acidic, water-insoluble fine particles which have been purified and classified, whereby cations having origin in the electrolytes are fixed in the acidic fine particles or anions having origin in the electrolytes are fixed in the basic fine particles. Synthetic resins modified in accordance with the modification method are produced.Type: GrantFiled: July 11, 1990Date of Patent: June 2, 1992Assignee: Fine Clay Co., Ltd.Inventor: Nobuo Furuno
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Patent number: 5116919Abstract: A process for increasing the relative viscosity of a polyamide includes heating the polyamide in the presence of a base and a catalyst with the catalyst being at least one compound of the formula:X--(CH.sub.2).sub.n PO.sub.3 R.sub.2wherein X is 2-pyridyl, 4-morpholino, 1-pyrrolidino, 1-piperidino or R'.sub.2 --N-- wherein R' is an alkyl group having between 1 and 12 carbon atoms;n is an integer from 2 to 5; andR, being the same or different, is H or an alkyl group having between 1 and 12 carbon atoms.Type: GrantFiled: December 5, 1990Date of Patent: May 26, 1992Assignee: E. I. du Pont de Nemours and CompanyInventors: John F. Buzinkai, Marion R. DeWitt, Jr., Robert C. Wheland