Contacting With Alkali (li, Na, K, Rb, Cs, Fr) Or Alkaline Earth (be, Mg, Ca, Sr, Ba) Metal Or Compound Thereof Patents (Class 528/488)
  • Patent number: 5527878
    Abstract: Polymers of maleic, fumaric or malic acids or maleic, fumaric or malic acid and ammonia with amino acids are prepared by heating at 180.degree.-350.degree. C., preferably 200.degree.-300.degree. C. The polymer formed may be converted to a salt by hydrolysis with a metal hydroxide or ammonium hydroxide.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: June 18, 1996
    Assignee: Calwood Chemical Industries, Inc.
    Inventors: Louis L. Wood, Gary J. Calton
  • Patent number: 5521252
    Abstract: Acrylic multilayer polymer powders containing coagulated powders of emulsified latexes of acrylic multilayer polymers, which are suitable for drying methods using pressure dehydration extruders, etc, comprises not more than 40 wt % of a fine powder of a particle size of 212 .mu.m or less after drying, and have a volume of gaps of a pore size of 5 .mu.m or less after drying of not more than 0.7 cc per unit weight as measured by a mercurial pressure method. A desired monomer is subjected to emulsion polymerization to produce an emulsified latex of an acrylic multilayer polymer, which is then poured into a coagulating solution for coagulation.
    Type: Grant
    Filed: February 17, 1995
    Date of Patent: May 28, 1996
    Assignee: Mitsubishi Rayon Company Ltd.
    Inventors: Kaoru Matsuda, Hirofumi Uno, Akihiro Toritani, Jun Nakauchi
  • Patent number: 5521281
    Abstract: The compound, [Pd(Me-DUPHOS)(MeCN).sub.2 ](BF.sub.4).sub.2, [Me-DUPHOS: 1,2-bis(2,5-dimethylphospholano)benzene] is an effective catalyst for the highly enantioselective, alternating copolymerization of olefins, such as aliphatic .alpha.-olefins, with carbon monoxide to form optically active, isotactic polymers which can serve as excellent starting materials for the synthesis of other classes of chiral polymers. For example, the complete reduction of a propylene-carbon monoxide copolymer resulted in the formation of a novel, optically active poly(1,4-alcohol).
    Type: Grant
    Filed: April 18, 1995
    Date of Patent: May 28, 1996
    Assignee: The Penn State Research Foundation
    Inventors: Ayusman Sen, Zhaozhong Jiang
  • Patent number: 5508376
    Abstract: Alcohol-soluble aromatic heterocyclic polymers and copolymers having repeating units of the formulae I or II: ##STR1## wherein Q is a benzobisazole of the formula: ##STR2## wherein X is --O-- or --S--; wherein x has a value of 0.0 to 1.00 and y has a value of 0.05 to 1.00, and R is selected from the group consisting of: ##STR3## and R' is selected from the group consisting of alkyl having 1 to 5 carbon atoms, alkaryl having 7 to 12 carbon atoms, aralkyl having 7 to 12 carbon atoms and substituted aromatic having 1 to 3 substituent groups. The alcohol-soluble polymers and copolymers may be used for fabricating organic/inorganic hybrid composites with metal alkoxides M(OZ).sub.v, wherein M is Si, Ti, Al or the like and Z is a lower alkyl group. These polymers and copolymers can also be used to coat materials or substrates which are susceptible to attack by highly corrosive acids.
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: April 16, 1996
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Thuy D. Dang, Jom P. Chen, Fred E. Arnold
  • Patent number: 5496891
    Abstract: The invention of this patent application relates to carboxylic acid polymer compositions and in particular relates to concentrates of polymers which are subsequently used to prepare gels formed of diluted and neutralised polymer. Said polymers are currently supplied in a powder form. The polymers prepared by the addition of multivalent cations provide a concentrate which is the invention of this application and can be provided in either an aqueous form or granular or pelletised form which serves to eliminate existing problems in the powder form relating to the dispersion of the powder in water, the development of electrostatic charges in the said powder and the dusting of the powder. The concentrate of the invention provides a polymer for subsequent dilution and neutralisation for use as a gel wherein the conversion from one state to another is greatly improved.
    Type: Grant
    Filed: December 29, 1993
    Date of Patent: March 5, 1996
    Assignee: Surfachem Group PLC
    Inventors: Stanley G. Stead, Peter E. Minister
  • Patent number: 5484878
    Abstract: A process is provided for preparing polysuccinimides by forming a polymerization mixture of poly(alkylene glycol), aspartic acid and, optionally, one or more other amino acids; heating the mixture to an elevated temperature; and maintaining the mixture at the elevated temperature to form polysuccinimides.
    Type: Grant
    Filed: August 25, 1994
    Date of Patent: January 16, 1996
    Assignee: Rohm and Haas Company
    Inventors: Yi H. Paik, Ethan S. Simon, Graham Swift
  • Patent number: 5463017
    Abstract: A process is provided for preparing polysuccinimides by forming a polymerization mixture of poly(alkylene glycol), maleamic acid and, optionally one or more other amic acids, heating the mixture to an elevated temperature, and maintaining the mixture at the elevated temperature to form polysuccinimides.
    Type: Grant
    Filed: August 25, 1994
    Date of Patent: October 31, 1995
    Assignee: Rohm and Haas Company
    Inventors: Yi H. Paik, Ethan S. Simon, Graham Swift
  • Patent number: 5459219
    Abstract: The content of spherulites of polyethylene resins is reduced by contact of the polyethylene resin while it is molten with lithium carbonate which is in a subdivided form and is dispersed in the molten polyethylene resin or which is in a form of a block and is removed from the polyethylene resin after the contact. The dispersed lithium carbonate can be removed with the reduced spherulite content preserved.
    Type: Grant
    Filed: May 23, 1994
    Date of Patent: October 17, 1995
    Inventor: Shigeru Yamamoto
  • Patent number: 5453485
    Abstract: Preparation of aqueous plastics dispersions which contain vinyl ester polymers or vinyl ester copolymers and have reduced contents of undesirable preparation-related residual monomeric vinyl esters and, where appropriate, acetaldehyde, from corresponding starting dispersions such as are obtainable by customary polymerization or copolymerization methods from ethylenically unsaturated monomers, by selective alkaline hydrolysis of the residual monomeric vinyl esters which can be hydrolyzed under alkaline conditions and if appropriate oxidation of the acetaldehyde to acetic acid in the aqueous dispersions.
    Type: Grant
    Filed: December 22, 1993
    Date of Patent: September 26, 1995
    Assignee: Hoechst AG
    Inventors: Hans-Ullrich Huth, Helmut Rinno, Bernahard Momper
  • Patent number: 5451657
    Abstract: An aqueous phenol-formaldehyde resin solution with formaldehyde-phenol mol ratio in the range of 1.8 to 2.8, polymerization catalyst of 3% to 9% by weight, measured as NaOH equivalent, with less than 1% by weight potassium hydroxide, and about 0.1% to about 0.75% by weight potassium carbonate added after the catalytically-activated polymerization reaction has subsided while the resin is both soluble and fusible ("A" resol stage). Adhesive binders exhibit tolerance for variables in veneer moisture content from 0% to around 25% and in production timing from delivery of the veneer for assembly to curing of around 10 minutes to about 2 hours without significant degradation of bonding quality.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: September 19, 1995
    Assignee: Neste Resins Corporation
    Inventor: Norman A. Chappelie
  • Patent number: 5442041
    Abstract: A thermoplastic resin such as a styrene/maleic anhydride copolymer is treated to remove volatile impurities such as unreacted styrene by admixing with a chemical blowing agent and extruding under a vacuum. The chemical blowing agent is converted into an inert gas such as carbon dioxide during extrusion; the gas evolved is removed, together with the volatile impurities, through one or more vents in the extruder. The use of a chemical blowing agent, rather than the inert gas itself, permits the facile distribution of the CO.sub.2 stripping agent throughout the molten thermoplastic resin using commonly available extruders without the need for elaborate gas injection means.
    Type: Grant
    Filed: January 19, 1995
    Date of Patent: August 15, 1995
    Assignee: ARCO Chemical Technology, L.P.
    Inventors: Ramesh Mallikarjun, Leon L. Otte, William J. Cleland
  • Patent number: 5420240
    Abstract: A process for the purification of a styrene polymer having a high degree of syndiotactivity. The styrene polymer is obtained by carrying out polymerization with a catalyst comprising (A) an aluminoxane and (B) a transition metal compound, which does not contain halogen. The styrene polymer is deashed with an alcoholic alkaline solution and then washed with an alcohol.
    Type: Grant
    Filed: March 21, 1994
    Date of Patent: May 30, 1995
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Masahiko Kuramoto, Hideo Teshima
  • Patent number: 5417969
    Abstract: Processes for forming a uniform, continuous coating of heparin covalently bonded to blood-contacting polyvinylchloride surfaces of a medical device are disclosed. These processes include coating the polyvinylchloride surfaces with an organic solvent solution of heparin complexed with an organic cation, and then exposing the coated surfaces to ionizing radiation to covalently bind the heparin moiety to the polyvinylchloride. The complex of the coating is formed from a heparin moiety and at least one cationic moiety selected from the group consisting of dimethylstearylamine, polyethyleneimine, benzalkonium, stearylkonium, and tridodecylmethylammonium; the complex is soluble in organic solvents and forms continuous and uniform coatings on polyvinylchloride. Advantageously, the heparin moiety can be bonded to the polyvinylchloride surfaces simultaneously with sterilizing the medical devices using ionizing radiation.
    Type: Grant
    Filed: November 18, 1993
    Date of Patent: May 23, 1995
    Assignee: Baxter International Inc.
    Inventors: Li-Chien Hsu, David P. Balding, Lawrence Farhat
  • Patent number: 5414057
    Abstract: 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: Grant
    Filed: December 1, 1993
    Date of Patent: May 9, 1995
    Assignee: General Electric Company
    Inventors: Allen J. Campbell, David M. Dardaris, Gary R. Faler, Patrick J. McCloskey, Thomas L. Evans
  • Patent number: 5374709
    Abstract: 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: Grant
    Filed: October 23, 1992
    Date of Patent: December 20, 1994
    Assignee: Phillips Petroleum Company
    Inventors: Earl Clark, Jr., Lacey E. Scoggins, Glenn F. Kile
  • Patent number: 5344896
    Abstract: Water-soluble rigid-rod aromatic heterocyclic polymers having repeating units of the formula: ##STR1## wherein n has a value of 0.05 to 1.
    Type: Grant
    Filed: February 7, 1994
    Date of Patent: September 6, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Thuy D. Dang, Fred E. Arnold
  • Patent number: 5342880
    Abstract: An aqueous phenol-formaldehyde resin solution with formaldehyde-phenol mol ratio in the range of 1.8 to 2.8, polymerization catalyst of 3% to 9% by weight, measured as NaOH equivalent, with less than 1% by weight potassium hydroxide, and about 0.1% to about 0.75% by weight potassium carbonate added after the catalytically-activated polymerization reaction has subsided while the resin is both soluble and fusible ("A" resol stage). Adhesive binders exhibit tolerance for variables in veneer moisture content from 0% to around 25% and in production timing from delivery of the veneer for assembly to curing of around 10 minutes to about 2 hours without significant degradation of bonding quality.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: August 30, 1994
    Assignee: Neste Resins Corporation
    Inventor: Norman A. Chappelie
  • Patent number: 5328982
    Abstract: Ester bonds are hydrolyzed in the conversion of substantially amorphous polyesters to their monomeric components, by being contacted with a mixture of (a) an alcohol, such as methanol, or glycol, (b) a polar aprotic solvent such as N-methyl-pyrrolidone or dimethyl sulfoxide and (c) an alkoxide or hydroxide such as sodium hydroxide.
    Type: Grant
    Filed: November 2, 1992
    Date of Patent: July 12, 1994
    Assignee: Eastman Chemical Company
    Inventors: George W. Tindall, Randall L. Perry, Art T. Spaugh, Jr.
  • Patent number: 5326854
    Abstract: A process capable of operation under hostile conditions for accelerating the sedimentation of suspended solids in an aqueous suspension using a flocculating agent comprising a water-soluble polymer composition produced from a monomer composition comprising at least one of a hydrophilic N-vinyl lactam or a hydrophilic vinyl-containing sulfonate.
    Type: Grant
    Filed: January 14, 1992
    Date of Patent: July 5, 1994
    Assignee: Phillips Petroleum Company
    Inventors: G. Allan Stahl, Henry L. Hsieh, Ahmad Moradi-Araghi
  • Patent number: 5324815
    Abstract: 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: Grant
    Filed: December 11, 1992
    Date of Patent: June 28, 1994
    Assignee: Nitto Denko Corporation
    Inventors: Akira Ohtani, Masao Abe, Yoshihiro Uetani, Keisuike Kii
  • Patent number: 5324811
    Abstract: A process for the preparation of aromatic polyamide pulp having excellent properties comprising:a) preparing a polymerization solvent by adding a Lewis acid type compound to an amide type organic solvent, an urea type organic solvent or a mixture thereof;b) obtaining an anisotropic liquid crystalline polymer solution prior to gelation by dissolving an aromatic diamine in the prepared polymerization solvent and adding an aromatic diacid chloride to the solution, and effecting the polymerization thereof;c) maintaining the polymer solution at a predetermined temperature for a predetermined period; andd) separating the polymerization solvent and pulverizing the polymer by pulping machine.
    Type: Grant
    Filed: April 28, 1992
    Date of Patent: June 28, 1994
    Assignee: Kolon Industries, Inc.
    Inventors: Seog C. You, Young H. Park, Sang Y. Oh, Chang S. Ji
  • Patent number: 5321122
    Abstract: There is disclosed a process for purification of a styrene polymer, for purifying a styrene polymer having a high degree of syndiotacticity obtained by using a catalyst comprising (A) aluminoxane and (B) a transition metal compound containing no halogen, deashing the above styrene polymer with an alcoholic alkaline solution and then washing with an alcohol. Also disclosed is a process for purification of a styrene polymer which comprises deashing the above styrene polymer having been produced with a conversion rate of 60% or more after swelling it by adding an aromatic solvent and/or a styrene monomer.According to the process of the present invention, a high purity styrene polymer can be obtained with good efficiency.
    Type: Grant
    Filed: October 21, 1992
    Date of Patent: June 14, 1994
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Masahiko Kuramoto, Hideo Teshima
  • Patent number: 5320905
    Abstract: Novel ionomers of normally solid, thermo-plastic, orientable, copolymers of ethylene and at least one alpha,beta-ethylenically-unsaturated carboxylic acid having a relatively high content of the carboxylic acid are prepared under conditions whereby the copolymers are essentially solubilized in a strong base and contacted with at least one compound which contains ionomer-forming cations. One of the preferred polymers is an ethylene/acrylic acid copolymer. The so-formed ionomers are useful as materials for constructing various items and articles.
    Type: Grant
    Filed: February 27, 1992
    Date of Patent: June 14, 1994
    Assignee: The Dow Chemical Company
    Inventors: Walter L. Vaughn, Thomas J. McKeand, Jr,
  • Patent number: 5317043
    Abstract: 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: Grant
    Filed: July 26, 1991
    Date of Patent: May 31, 1994
    Assignee: Belland AG
    Inventor: Michael Gass
  • Patent number: 5314990
    Abstract: A process for the continuous processing of vinyl polymer latices to produce thermoplastically processible vinyl polymer powder by coagulating a stream of a vinyl polymer latex by the addition of a stream of a coagulant with intensive mixing and shearing in a cascade of vessels at an average residence time per vessel of 10 to 60 minutes and at temperatures from 50 to 120.degree. C., volatile auxiliary substances and residual monomers in the polymer being optionally removed by steam distillation and part of the serum separated from the vinyl polymer being added to the stream of coagulant.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: May 24, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ulrich Jansen, Karl-Heinz Ott, Wolfgang Herrig, Otto Koch, Alfred Pischtschan, Dieter Wittmann
  • Patent number: 5294697
    Abstract: A procedure is described for the preparation of colorless hydrocarbon resins having a higher thermal stability than similar products in the known art. The procedure involves the treatment of polymeric mixtures deriving from the (co)polymerization by means of Friedel-Crafts catalysts of hydrocarbons or mixtures of ethylenically unsaturated hydrocarbons, with an organometallic compound of Magnesium and/or Lithium, the separation of the inorganic residues and the final removal of the volatile organic products.
    Type: Grant
    Filed: February 11, 1992
    Date of Patent: March 15, 1994
    Assignee: Enichem Anic S.R.L.
    Inventors: Ambrogio Magni, Attilio Sioli, Claudia Andena, Mario Ponzinibbi
  • Patent number: 5292862
    Abstract: The method includes the steps of feeding a polymer to an extruder where the polymer is melted, metering the molten polymer from the extruder to a tubular pyrolysis reactor through metering means connected to the extruder, and pyrolytically decomposing the polymer in the tubular pyrolysis reactor in the presence of a higher fatty acid, and/or a hydrochloric acid acceptor.
    Type: Grant
    Filed: January 22, 1992
    Date of Patent: March 8, 1994
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Eigo Miura, Takashi Yamanaka, Ryoji Ohori, Akio Ohdaira, Kenichi Nishiwaki, Yoshikuni Itoh, Yoshinori Morita, Hajime Inagaki
  • Patent number: 5288849
    Abstract: Alumina-based adsorbents containing at least one compound of an alkali or alkaline earth metal, wherein the alkali or alkaline earth metal values are present in an amount ranging from 15 mmole to 100 mmole per 100 g of alumina, are useful for the adsorptive purification of polyolefins prepared by the polymerization of olefins in the presence of a metallic coordination catalyst, to remove contaminating catalyst metal values therefrom with but negligible monomer/solvent isomerization.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: February 22, 1994
    Assignee: Rhone-Poulenc Chimie
    Inventors: Eric Garcin, Claude-Bernard Cartier, Eric Quemere
  • Patent number: 5266680
    Abstract: A method is provided for the production of poly(arylene sulfide) compositions comprisinga) contacting under suitable conditions a sulfur source, a dihalogenated aromatic compound and optionally other halogenated aromatic compounds, a polar organic compound, a base, and an alkali metal carboxylate in order to form a substantially liquid mixture comprising poly(arylene sulfide) polymer, polar organic compound and water;b) slowly cooling to form a slurry comprising solid poly(arylene sulfide) particles and liquid comprising the polar organic compound and water and adding an effective amount of at least one extraction agent;c) contacting the poly(arylene sulfide) particles with an aqueous solution containing calcium ions; andd) recovering the poly(arylene sulfide) composition.The poly(arylene sulfide) compositions prepared according to the invention method are especially useful for the preparation of fibers and monofilaments.
    Type: Grant
    Filed: June 24, 1992
    Date of Patent: November 30, 1993
    Assignee: Phillips Petroleum Company
    Inventor: Jerry O. Reed
  • Patent number: 5258490
    Abstract: A clinically-acceptable hydrophilic silicone-based soft gas permeable contact lens produced by subjecting the lens material to extraction with a hydrophilic, polar group-containing, organic solvent followed by replacement of the organic solvent with a physiological saline solution.
    Type: Grant
    Filed: June 16, 1992
    Date of Patent: November 2, 1993
    Inventor: Sing-Hsiung Chang
  • Patent number: 5248762
    Abstract: Cyclic polyoxymethylene having a number-average molecular weight of 500 to 5,000 is obtained by solid state cyclization reaction of an alkalidegradative linear oxymethylene homopolymer in the presence of a medium containing a cationic catalyst.The cyclization is effected at 10.degree. to 150.degree. C. for 1 to 500 minutes in an organic liquid medium.The reaction mixture obtained by the cyclization is treated with an alkaline medium to hydrolyze and remove away unreacted linear polyoxymethylene homopolymer, and isolate the cyclic polyoxymethylene.The product has a sharp molecular weight distribution and is useful as a resin improver.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: September 28, 1993
    Assignee: Polyplastics Co., Ltd.
    Inventors: Kaoru Yamamoto, Toshio Shiwaku
  • Patent number: 5242995
    Abstract: Novel modified polymeric materials are provided. The polymeric materials according to the invention are prepared by grafting a fluorine-containing compound onto a polyurethane polymeric substrate. The polymeric materials show superior blood compatibility in the in vitro and ex vivo tests, attributing to hydrophobic property, inertness and water-repelling property intrinsic to the grafted fluorine containing compounds.The polymeric materials according to the invention are useful as the materials for the artificial, circulatory, internal organ systems to be contacted with blood, such as artificial hearts, artificial blood vessels, artificial heart valves, artificial blood oxygenators, and artificial kidneys, or for the medical devices/instruments to be inserted into the blood vessels, such as vein catheters, artery catheters and intra-aortic balloon pumps.
    Type: Grant
    Filed: September 27, 1991
    Date of Patent: September 7, 1993
    Assignee: Korea Institute of Science and Technology
    Inventors: Young H. Kim, Dong K. Han
  • Patent number: 5239054
    Abstract: The nuisance metal-corrosive property is effectively lowered by mixing an heating polyarylene sulfide resins with (i) zinc carbonate; (ii) zinc carbonate and an alkaline earth metal chloride; (iii) zinc oxide and/or hydroxide; or (iv) zinc oxide and/or hydroxide, and an alkaline earth metal chloride in the presence of a good solvent for the resins.
    Type: Grant
    Filed: December 17, 1991
    Date of Patent: August 24, 1993
    Assignee: Tosoh Corporation
    Inventors: Toshihiko Muneto, Toshikazu Kato, Hiroshi Inoue
  • Patent number: 5232745
    Abstract: Described is a method of neutralizing acid containing compositions present in an insulation board comprising the steps of providing an insulation board containing a leachable acid composition and neutralizing the leachable acid by applying to the board an effective neutralizing amount of an inorganic alkali metal or alkaline earth metal salt. Preferably, the board is a phenolic foam having opposing sides of a fiberglass facer with the neutralizing agent embedded in the fiberglass facer.
    Type: Grant
    Filed: March 1, 1991
    Date of Patent: August 3, 1993
    Assignee: Manville Corporation
    Inventors: Richard E. Kajander, Eric J. Adamczyk
  • Patent number: 5194583
    Abstract: The use of aluminum sulfate to neutralize alkaline solutions yields a gelatinous precipitate. When neutralization of the solution causes other materials to precipitate along with the gel, filtration of the precipitated materials is very difficult because of the gel. When the combination of magnesium sulfate and aluminum sulfate is used as the neutralizing agent for an alkaline stripper solution of a photoresin, the voluminous sludge may be filtered quickly.
    Type: Grant
    Filed: April 26, 1991
    Date of Patent: March 16, 1993
    Assignee: Morton International, Inc.
    Inventor: Gerald A. Krulik
  • Patent number: 5180803
    Abstract: A method for the stabilization and isolation of a fluoropolymer bearing carboxylic acid (--CO.sub.2 H) groups and prepared as an aqueous dispersion using a dispersion polymerization process which employs a dispersing agent whose dispersion-stabilizing effect is removable by heating the dispersion and an initiator (or initiator system) which yields carboxylic acid groups on the fluoropolymer, which method comprises, after preparing an aqueous dispersion of the fluoropolymer using dispersion polymerization, converting the carboxylic acid groups on the fluoropolymer in the aqueous dispersion to carboxylate anion groups (--CO.sub.2 --) using a base and then heating the so-modified fluoropolymer dispersion to cause simultaneously:1) substantial removal of carboxylate anion groups, thereby to yield stable groups in their place, and2) isolation of the fluoropolymer from the dispersion by coagulation (agglomeration) of the fluoropolymer dispersion.
    Type: Grant
    Filed: August 1, 1991
    Date of Patent: January 19, 1993
    Assignee: Imperial Chemical Industries PLC
    Inventor: Howard C. Gibbard
  • Patent number: 5179181
    Abstract: According to the present invention, there is provided an improvement of a process for producing fluorine-containing copolymers comprising copolymerizing(a) a chlorinated fluoroolefin,(b) vinyl ether, and(c) an organosilicon compound having an olefinically unsaturated bond and a hydrolyzable bond,the improvement resides in that a chlorine trapping agent is allowed to exist in the system during the copolymerization reaction and/or the purification of the resulting copolymer, and the fluorine-containing copolymers are free from coloration.Further, according to the present invention, a fluorine-containing copolymer composition containing a specific curing catalyst is also provided and said composition is excellent in adhesion to substrates or base materials.
    Type: Grant
    Filed: May 13, 1991
    Date of Patent: January 12, 1993
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Shiro Honma, Takashi Izumi, Hajime Inagaki, Sakae Murakami
  • Patent number: 5177297
    Abstract: A process for separating lithium from a conjugated diolefin polymer wherein a solution containing said conjugated diolefin polymer and a lithium compound is contacted with magnesium phosphate, magnesium phosphate dibasic, magnesium dihydrogen phosphate or a mixture thereof. Preferably, the magnesium phosphate compound is selected from the group consisting of mono- and dihydrogen phosphates. Most preferably, the magnesium phosphate is magnesium phosphate dibasic. The magnesium phosphate, magnesium phosphate dibasic, magnesium phosphate or mixture thereof may be used in combination with water and/or methanol with relatively good results. The lithium, which is a polymerization catalyst, can be removed immediately after the conjugated diolefin polymer is prepared by contacting the polymer solution with the magnesium phosphate compound.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: January 5, 1993
    Assignee: Shell Oil Company
    Inventor: Carma J. Gibler
  • Patent number: 5175249
    Abstract: This invention relates to a process for the isolation and purification of polyarylene sulphides, preferably polyphenylene sulphides, from their reaction mixture. The process requires no organic solvents for the purification (washing) of the polymer.
    Type: Grant
    Filed: January 24, 1992
    Date of Patent: December 29, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Fischer, Wolfgang Arlt, Manfred Schmidt
  • Patent number: 5144005
    Abstract: 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: Grant
    Filed: February 4, 1988
    Date of Patent: September 1, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gunter Sextro, Karl-Friedrich Muck, Karlheinz Burg, Eberhard Fischer
  • Patent number: 5122579
    Abstract: Certain linear alternating polymers of carbon monoxide and styrene are characterized by a high degree of syndiotactic character. This degree of syndiotactic character is reduced together with an attendant increase in atactic character by contacting the syndiotactic polymer with organ base at an elevated temperature.
    Type: Grant
    Filed: July 17, 1990
    Date of Patent: June 16, 1992
    Assignee: Shell Oil Company
    Inventors: Piero Pino, deceased, Giorgia Petrucci, Marco Barsacchi
  • Patent number: 5118787
    Abstract: 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: Grant
    Filed: July 11, 1990
    Date of Patent: June 2, 1992
    Assignee: Fine Clay Co., Ltd.
    Inventor: Nobuo Furuno
  • Patent number: 5112529
    Abstract: The present invention relates to a conductive material and a process for producing said conductive material. More particularly, the present invention relates to a conductive material comprising (a) a substrate obtained from a polycarbodiimide resin and (b) a dopant, which is superior in oxidation resistance, mechanical strengths and flexibility, and useful as a material for electronic field, as well as to a process for producing said conductive material.
    Type: Grant
    Filed: September 4, 1990
    Date of Patent: May 12, 1992
    Assignee: Nisshinbo Industries, Inc.
    Inventor: Kazuo Saito
  • Patent number: 5104972
    Abstract: A process is provided comprising the steps of contacting a Group VIII metal hydrogenation catalyst residue containing polymer solution with a silicate, and recovering a polymer solution comprising less than 5 ppm by weight, based on the solution, of the Group VIII metal. In a preferred embodiment, the silicate is calcium silicate, magnesium silicate or diatomaceous earth.
    Type: Grant
    Filed: November 23, 1990
    Date of Patent: April 14, 1992
    Assignee: Shell Oil Company
    Inventors: Ajay M. Madgavkar, Carma J. Gibler, David W. Daum
  • Patent number: 5091486
    Abstract: A process for preparing polyacetals having less than 10% by weight carbonyl containing units and in which the molar ratio of acetal to furan units is greater than or equal to 15:1 is provided. The process comprises reacting a linear alternating polymer of carbon monoxide with one or more olefins (polyketone) with a diol at elevated temperature in the presence of an acid e.g. para-toluenesulphonic acid while continuously removing water generated by the reaction. Water is preferably removed by azeotropic distillation using a water-immiscible solvent.
    Type: Grant
    Filed: July 10, 1990
    Date of Patent: February 25, 1992
    Assignee: The British Petroleum Company p.l.c.
    Inventor: Andrew R. Lucy
  • Patent number: 5086128
    Abstract: This invention relates to new high molecular weight arylene sulphide polymers which optionally additionally display improved resistance to UV radiation and are prepared by melting arylene sulphide polymers, preferably PPS, with polynitro compounds or with mononitro compounds containing at least one other substituent capable of reacting with the arylene sulphide polymer.
    Type: Grant
    Filed: September 18, 1990
    Date of Patent: February 4, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Detlef Heinz, Burkhard Kohler, Rolf-Volker Meyer, Klaus Reinking, Alexa Sommer
  • Patent number: 5045628
    Abstract: A process is provided for preparing more granular (i.e., higher bulk density) particulate poly(arylene sulfide ketone) or poly(arylene sulfide diketone) resins having associated therewith improved processability and thermal stability, without generating pressures significantly greater than those generated during polymerization reactions of particulate poly(arylene sulfide ketone) or poly(arylene sulfide diketone) resins.
    Type: Grant
    Filed: December 29, 1989
    Date of Patent: September 3, 1991
    Assignee: Phillips Petroleum Company
    Inventor: Afif M. Nesheiwat
  • Patent number: 5019645
    Abstract: Certain linear alternating polymers of carbon monoxide and aliphatic .alpha.-olefin of 3 or more carbon atoms are characterized by a high degree of stereoregular character. Reduction of the degree of this stereoregular character, whether syndiotactic or isotactic, is achieved together with an increase in atactic character by contacting the stereoregular polymer with organic base at elevated temperature.
    Type: Grant
    Filed: May 7, 1990
    Date of Patent: May 28, 1991
    Assignee: Shell Oil Company
    Inventors: Pui K. Wong, Eit Drent
  • Patent number: 4997911
    Abstract: The present invention provides a method for recovering polymer agglomerates in the form of dry powders or granules comprising steps of:(A) coagulating a polymer latex obtained by emulsion polymerization or suspension polymerization to thereby form hydrous agglomerates in which latex particles are not fused together,(B) immersing the hydrous agglomerates in an organic liquid insoluble or hardly soluble in water which wets but does not dissolve or swell said agglomerates at a temperature lower than the temperature at which the latex particles constituting the agglomerates are fused together, to thereby substitute said organic liquid for the water contained in the agglomerates with the organic liquid,(C) thereby forming two phases; a water phase expelled from the agglomerates and an organic liquid phase in which the agglomerates are immersed,(D) separating the agglomerates from the organic liquid phase, and(E) removing by evaporation the organic liquid attached to the agglomerates, whereby the agglomerates are r
    Type: Grant
    Filed: September 7, 1988
    Date of Patent: March 5, 1991
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hideo Yasui, Wataru Okada, Yasuhiro Miki, Toragoro Mitani
  • Patent number: 4921909
    Abstract: Emulsion polymerization type thermoplastic resin of high performance can be produced by the following methods: namely, a method which comprises removing an aqueous phase from a two-phase mixture comprising a latex of polymer (1) produced by emulsion polymerization, a water soluble agent (2) in an amount of 10% by weight or less of said polymer (1) which is capable of coagulating the latex of polymer (1) and an organic agent (3) in an amount of 0.1 to 6 times the weight of said polymer (1) which is capable of dissolving both an uncrosslinked polymer contained in said polymer (1) and thermoplastic polymer (4) mentioned hereinbelow and has a solubility in water of 5% by weight or less at 25.degree. C.
    Type: Grant
    Filed: December 24, 1986
    Date of Patent: May 1, 1990
    Assignee: Mitsubishi Rayon Company, Ltd.
    Inventors: Teruhiko Sugimori, Noriyuki Tajiri, Yutaro Fukuda