Treating At O Deg C (32 Deg F) Or Below, Or At 200 Deg C (392 Deg F) Or Above Patents (Class 528/481)
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Patent number: 5232952Abstract: Finely dispersed metal-carrying compound whose metal has 50 .ANG. or less in size, which is useful as, for instance, catalysts and electrically conducting agents, is prepared by heating ion-exchange resin on which metal ion such as Pt ion is adsorbed, at 300.degree.-1500.degree. C. under an inert gas atmosphere, and, if desired, reducing.Type: GrantFiled: November 18, 1988Date of Patent: August 3, 1993Assignee: Sumitomo Chemical Co., Ltd.Inventors: Masaaki Matsuda, Masao Minobe
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Patent number: 5219894Abstract: A method for treating the surface of a thin porous film material of tetrafluoroethylene resin is disclosed, which comprises heating said surface to a temperature higher than the thermal decomposition point of said resin so as to decompose and remove part of said surface. The resulting thin porous film material of tetrafluoroethylene resin has an adhesive surface while retaining the desired pore size, hardness, and degree of penetration of adhesive.Type: GrantFiled: September 28, 1992Date of Patent: June 15, 1993Assignee: Sumitomo Electric Industries, Ltd.Inventors: Katsuya Yamada, Koichi Okita, Shin-ichi Toyo-oka, Shigeru Asako
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Patent number: 5218080Abstract: A process for preparing polyamides from amide monomers in a reaction vessel where a portion of the monomers remain unreacted or form oligomers as an extractable fraction includes extracting from the polyamide unreacted amide monomers and oligomers to yield an extracted proportion by weight based on total reaction charge; reducing the oligomer concentration of the extracted proportion relative to the total extract concentration; and returning the extract to the reaction vessel as substantially the same proportion as extracted by weight based on the total reaction charge, so that, after a single extraction, throughout the process the extractable fraction remains below its equilibrium concentration.Type: GrantFiled: October 10, 1991Date of Patent: June 8, 1993Assignee: BASF CorporationInventor: Jack A. Dellinger
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Patent number: 5209977Abstract: The present invention relates to crosslinkable microfine ethylene copolymer powders which are substantially spherical in shape and range in size from about 10 up to about 500 microns and to the process of crosslinking the powders to reduce their melt flow rate. The powders are crosslinked by contacting with water in the presence of a silanol condensation catalyst at temperatures from ambient up to about 110.degree. C. The reduction in melt flow rate is accomplished without substantially changing the powder characteristics, i.e., particle size and particle size distribution.Type: GrantFiled: November 26, 1991Date of Patent: May 11, 1993Assignee: Quantum Chemical CorporationInventors: Manfred Heimberg, Daniel J. Ondrus
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Patent number: 5204416Abstract: Fluorinated poly(arylene ethers) having a repeat unit such as ##STR1## are useful as dielectric materials in multilayer interconnects in integrated circuit chips and multichip modules and as protective materials for chips.Type: GrantFiled: April 7, 1992Date of Patent: April 20, 1993Assignee: Raychem CorporationInventors: Frank W. Mercer, Richard C. Sovish
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Patent number: 5202414Abstract: Dithioether-linked phthalonitrile monomer are prepared by a substitution reaction between 4-nitrophthalonitrile and a dimercaptan and are polymerized to a high-temperature, oxidation-resistant polymer by heating them at a temperature above their melting point. The rate of polymerization is increased by the addition of an amine. Electrical conductivity of the polymer can be increased to the conductor range by heating the polymer above about 400.degree. C.Type: GrantFiled: October 19, 1990Date of Patent: April 13, 1993Assignee: The United States of America as Represented by the Secretary of the NavyInventors: Teddy M. Keller, Thomas R. Price, deceased
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Patent number: 5202402Abstract: Styrene copolymers having a repeating unit (I) represented by the general formula: ##STR1## and a repeating unit (II) represented by the general formula: ##STR2## (wherein all the symbols are as defined in the appended claims), and having the stereoregularity that is mainly syndiotactic, and cross-linked styrene copolymers obtained by cross-linking the above styrene copolymers. The styrene copolymers are reactive resins (heat-sensitive resins and radiation-sensitive resins) and are excellent in heat resistance and chemical resistance. The cross-linked styrene copolymers are excellent in heat resistance, chemical resistance and mechanical strength.Type: GrantFiled: April 11, 1991Date of Patent: April 13, 1993Assignee: Idemitsu Kosan Co., Ltd.Inventors: Keisuke Funaki, Masakazu Abe, Michitake Uoi
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Patent number: 5198305Abstract: A novel optical element substrate which comprises a random copolymer comprising, in specific weight proportions, a methyl methacrylate unit, an aromatic vinyl compound unit, an unsaturated aliphatic acid unit and a hexagonal acid anhydride unit of the formula ##STR1## The substrate has excellent heat resistance, thermal stability, transparency, resistance to scratching and metal layer corrosion preventive properties and exhibits advantageously low double refraction and warpage. The novel substrate can be advantageously employed as a substrate for an optical element such as an optical disc, e.g. a digital audio disc, a video disc and a disc capable of being directly read after recording, a mirror, a lens and the like.Type: GrantFiled: December 23, 1991Date of Patent: March 30, 1993Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Akihiro Wada, Rin-ichi Kakuta
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Patent number: 5198527Abstract: There are disclosed carbonate polymers having terminal arylcyclobutene moieties. Such carbonate polymers are prepared from one or more multi-hydric compounds and have an average degree of polymerization of at least about 2 based on multi-hydric compound. These polymers, including blends thereof, can be easily processed and shaped into various forms and structures according to the known techniques. During or subsequent to the processing, the polymers can be crosslinked, by exposure to heat or radiation, for example, to provide crosslinked polymer compositions. These compositions have a good combination of properties, including for example, processability into shaped articles having unexpectedly good combinations of toughness, solvent resistance, ignition resistance, modulus and resistance to thermal linear expansion.Type: GrantFiled: June 4, 1992Date of Patent: March 30, 1993Assignee: The Dow Chemical CompanyInventors: Maurice J. Marks, Alan K. Schrock, Thomas H. Newman
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Patent number: 5183853Abstract: Articles of syndiotactic styrene polymer where the polymer is present predominantly in a new crystalline form characterized by an X-ray spectrum which presents reflections of maximum intensity at 2 .theta.of 12.2.degree. and 20.0.degree., where in the 2 .theta. range from 15.degree. to 18.degree. no reflections of appreciable intensity appear.Type: GrantFiled: February 27, 1990Date of Patent: February 2, 1993Assignee: Himont IncorporatedInventors: Gaetano Guerra, Vincenzo M. Vitagliano, Paolo Corradini, Enrico Albizzati
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Patent number: 5175214Abstract: The invention relates to a pressure-sensitive conductive elastomer compound which exhibits high resistance (insulating performance) when it is in non-pressed condition and the resistance of which, as the compound is pressed, varies according to the magnitude of the pressure. The compound comprises a matrix material having insulating and elastomeric properties and baked and carbonized conductive spherical particles of a macromolecular material incorporated and dispersed into the matrix material. The conductivity of the conductive particles varies according to the degree of their carbonization.Type: GrantFiled: November 27, 1991Date of Patent: December 29, 1992Assignee: Nitta Industries CorporationInventors: Mitsuo Takaya, Kiyotaka Inoue, Katsumi Higuchi
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Patent number: 5175249Abstract: 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: GrantFiled: January 24, 1992Date of Patent: December 29, 1992Assignee: Bayer AktiengesellschaftInventors: Thomas Fischer, Wolfgang Arlt, Manfred Schmidt
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Patent number: 5171478Abstract: A process for increasing the intrinsic viscosity of polyaniline by heating the polyaniline in the solid state.Type: GrantFiled: March 5, 1991Date of Patent: December 15, 1992Assignee: Allied-Signal Inc.Inventor: Chien-Chung Han
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Patent number: 5167888Abstract: This invention relates to a method of producing polymer composites comprising a polymeric matrix (Host) in which crystallites of organic and/or inorganic compounds (Guest) are grown in situ. The growth of crystals is achieved by a temperature gradient zone melting technique. The resultant crystals have high crystalline alignment, good transparency and high second harmonic generation activity.Type: GrantFiled: November 26, 1990Date of Patent: December 1, 1992Assignee: The British Petroleum Company p.l.c.Inventors: Nazar E. N. Azoz, Munteser M. Kadim
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Patent number: 5164428Abstract: Concrete/mortar is manufactured with a small amount of water by using fine polymer particles containing frozen water. The water becomes available when the particles thaw or the particles may be used directly without freezing.Type: GrantFiled: February 15, 1990Date of Patent: November 17, 1992Assignees: Mitsui Kensetsu Kabushiki Kaisha, Shiiai Kemutekku Kabushiki Kaisha, Oosaka Yuuki Kagaku Kogyo Kabushiki KaishaInventors: Tadashi Okamoto, Toru Sato, Taiji Kanbayashi, Chuzo Kato
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Patent number: 5164478Abstract: A process for preparing polyarylates having low color wherein isophthalic acid, terephthalic acid, and bisphenol A are melt polymerized to form a prepolymer, the prepolymer is crystallized, and then further polymerized in the solid state by heating under an inert gas flow, e.g. nitrogen. Crystallization is accomplished by adding the amorphous prepolymer in powder or pellet form to a organic crystallizing medium such as 2-ethoxyethyl acetate or hexyl acetate. This process produces a polymer having low color content. The crystallized polymer may be made amorphous by melting. This amorphous polymer is useful in applications requiring a transparent, colorless plastic.Type: GrantFiled: August 13, 1991Date of Patent: November 17, 1992Assignee: Hoechst Celanese Corp.Inventors: Cherylyn Lee, Larry F. Charbonneau, Gordon W. Calundann
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Patent number: 5157108Abstract: Compounds containing alpha-amidoacetyle linkages are described that are thermally labile and yield nucleophilic and azlactone products. Nucleophiles are useful as curing agents for epoxy resin sealants and adhesives and azlactones are useful in crosslinking systems for polymers.Type: GrantFiled: December 12, 1989Date of Patent: October 20, 1992Assignee: Minnesota Mining and Manufacturing CompanyInventors: Larry R. Krepski, Steven M. Heilmann, Dean M. Moren, Jerald K. Rasmussen
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Method of storing food or plant materials by wrapping with a stretched syndiotactic polystyrene film
Patent number: 5145950Abstract: A method of wrapping plant materials for storage by wrapping the plant materials with a food wrapping material obtained by stretching a styrene-based polymer film with mainly syndiotactic configuration. The wrapping material is transparent, has gloss and is excellent in physical properties such as gas permeability and heat resistance making it very useful in the method for wrapping material such as vegetables and fruits requiring permeation and diffusion of gases such as oxygen and carbon dioxide.Type: GrantFiled: February 4, 1991Date of Patent: September 8, 1992Assignee: Idemitsu Kosan Co., Ltd.Inventors: Keisuke Funaki, Komei Yamasaki -
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: 5135673Abstract: An organic ferromagnetic substance and a process for producing same are disclosed, which substance is a product of the carbonization of at least one polymer in mid course of graphitization selected from (a) an aromatic polymer having a structure such that the aromatic compounds are connected via alkylene chains which may be substituted by an alkyl or aryl group, (b) a polymer of a triarymethane, (c) a polymer of an acetylene compound and (d) a polymer of an .alpha., .beta.-unsaturated compound, characterized in that the ferromagnetic substance contains 1-10 hydrogen atoms per 100 carbon atoms. This organic ferromagnetic substance can be produced in a high yield from commercially available polymers in a simple manner and possesses excellent stability to heat, chemicals and weathering action. Accordingly, this substance can be used in various industrial fields.Type: GrantFiled: August 23, 1990Date of Patent: August 4, 1992Assignee: Director General of Agency of Industrial Science and TechnologyInventors: Kazuhisa Murata, Akio Matsuda, Takashi Masuda
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Patent number: 5130411Abstract: An improved process for preparing increased molecular weight polyarylene sulfides is disclosed. The process comprises at least two stages: a first polymerization stage in which a polymer of a relatively low molecular weight is prepared and a second polymerization stage in which the molecular weight is substantially increased. The increased molecular weight permits the polymer to be used in a wide range of molding and shaping applications.Type: GrantFiled: March 6, 1991Date of Patent: July 14, 1992Assignee: Tosoh CorporationInventors: Shinji Tanaka, Hiroshi Inoue
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Patent number: 5126431Abstract: 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: GrantFiled: December 29, 1989Date of Patent: June 30, 1992Assignee: Phillips Petroleum CompanyInventor: Afif M. Nesheiwat
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Patent number: 5122592Abstract: This invention relates to a process of preparing polytetrafluoroethylene comprising one or more fractions of polyethylene having a melting point of greater than about 340.degree. C. by subjecting a polytetrafluoroethylene to a shear at elevated temperature.Type: GrantFiled: September 1, 1989Date of Patent: June 16, 1992Assignee: Allied-Signal Inc.Inventors: Yash P. Khanna, Georgette Chomyn, Rakesh Kumar, Annemarie C. Reimschuessel
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Patent number: 5112529Abstract: 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: GrantFiled: September 4, 1990Date of Patent: May 12, 1992Assignee: Nisshinbo Industries, Inc.Inventor: Kazuo Saito
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Patent number: 5110878Abstract: Dry polyamide-epichlorohyrin resin powder that is useful to increase the wet strength of paper is prepared by freeze-drying.Type: GrantFiled: May 14, 1991Date of Patent: May 5, 1992Assignee: E. I. Du Pont de Nemours and CompanyInventor: Ronald L. Amey
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Patent number: 5100434Abstract: Crosslinking of polybenzobisthiazole and polybenzobisoxazole in fiber formed by thermal elimination of halogen raises the compressive properties.Type: GrantFiled: January 8, 1991Date of Patent: March 31, 1992Assignee: E. I. du Pont de Nemours and CompanyInventor: Wilfred Sweeny
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Patent number: 5098994Abstract: A process for separating a resin phase from a solvent solution containing a solvent, demetallized oil and resin which process comprises: (a) directing the flow of the solvent solution in a downward direction over a portion of a generally vertically positioned heat-exchange surface thereby heating the solvent solution to precipitate a resin phase; (b) reversing the flow of the solvent solution having a reduced concentration of resin to a generally upward direction; (c) recovering the solvent solution having a reduced concentration of resin; and (d) recovering the resin phase produced in step (a).Type: GrantFiled: December 24, 1990Date of Patent: March 24, 1992Assignee: UOPInventor: Brian W. Hedrick
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Patent number: 5091509Abstract: A poly(arylene sulfide ketone) or poly(arylene sulfide diketone) resin having improved handling characteristics is prepared by a process comprising preparing in a first enclosed vessel a slurry comprising a solid poly(arylene sulfide ketone) or poly(arylene sulfide diketone) resin and a liquid polar organic compound, and optionally water; then substantially liquifying the resin to form a mixture comprising substantially liquified resin and polar organic compound; then flashing the mixture into a second vessel having a pressure lower than the first vessel, thereby removing a portion of the polar organic compound and solidifying the resin.When the slurry further comprises water, the invention method optionally includes a venting step prior to the substantial liquification of the resin and/or a concentration step after the substantial liquification of the resin.Type: GrantFiled: December 29, 1989Date of Patent: February 25, 1992Assignee: Phillips Petroleum CompanyInventors: Afif M. Nesheiwat, Jon F. Geibel
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Patent number: 5089597Abstract: The invention is a process to provide more granular, higher bulk density particulate poly(arylene sulfide ketone) or poly(arylene sulfide diketone) resins having associated therewith improved handling.The process for treating a first slurry comprising a solid particulate poly(arylene sulfide ketone) or poly(arylene sulfide diketone) resin dispersed in a liquid medium comprising a polar organic compound, comprises: (a) liquifying the first solid particulate resin in the first slurry to form a first mixture comprising a liquified resin and the polar organic compound; (b) adding, to the first mixture, a sufficient amount of at least one separaton agent to produce a second mixture, and (c) reducing the temperature of the second mixture sufficiently to solidify the liquified resin to form a second slurry comprising a polar organic compound and a second solid particulate resin having a bulk density greater than the first solid particulate resin would if recovered.Type: GrantFiled: December 29, 1989Date of Patent: February 18, 1992Assignee: Phillips Petroleum CompanyInventors: Afif M. Nesheiwat, John E. Geibel
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Patent number: 5087660Abstract: A process for treating a mixture of a polymer and a chlorinated organic solvent under heating, characterized by employing an apparatus in which a portion thereof to be brought into contact with the heated mixture is made of an acid resistant inorganic material selected from a group consisting of a metallic composition containing at least 85% of copper, nickel or a mixture thereof, and a ceramic material. Deterioration in color is improved in a process for recovering a polymer dissolved in the chlorinated organic solvent.Type: GrantFiled: February 27, 1990Date of Patent: February 11, 1992Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Noriyuki Kunishi
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Patent number: 5086128Abstract: 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: GrantFiled: September 18, 1990Date of Patent: February 4, 1992Assignee: Bayer AktiengesellschaftInventors: Hans-Detlef Heinz, Burkhard Kohler, Rolf-Volker Meyer, Klaus Reinking, Alexa Sommer
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Patent number: 5086160Abstract: A thermotropic copolyester, showing a liquid-crystalline structure of nematic type within a desired temperature range, contains umits deriving from:(a) a saturated bicarboxy aliphatic acid;(b) 4,4'-di-hydroxy-diphenyl,(c) 4-hydroxybenzoic acid; and(d) 4-hydroxy-benzoic acid bearing an alkyl substituent or a halogen atom bonded to the aromatic ring.Such a copolyester constitutes a material endowed with self-reinforcing characteristics, originating, through the usual transformation processes by injection or by extrusion techniques, marked molecular orientations, which supply the manufactured articles with high stiffness characteristics.Said material can be also used as a reinforcing agent when is mixed, by means of the usual techniques, with the traditional thermoplastic polymers.Type: GrantFiled: June 1, 1990Date of Patent: February 4, 1992Assignee: Eniricerche S.p.A.Inventors: Ugo Pedretti, Bruno Bresci, Cesarina Bonfanti, Pier L. Magagnini, Francesco P. La Mantia, Arnaldo Roggero
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Patent number: 5081188Abstract: A composition comprising tetrafluoroethylene polymers and selected poly(2,2-dialkylpropiolactones) that is useful as a molding compound is disclosed. Also provided is a process for the production and use of such a mixture and the pyrolysis of the mixture to give polytetrafluoroethylene parts.Type: GrantFiled: March 23, 1990Date of Patent: January 14, 1992Assignee: E. I. du Pont de Nemours and CompanyInventor: Young H. Kim
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Patent number: 5077385Abstract: A polymer material having barrier properties prepared from a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon, a process for preparing this polymer material, a laminar structure and an article prepared from the polymer material.Type: GrantFiled: August 16, 1990Date of Patent: December 31, 1991Assignee: Shell Oil CompanyInventors: Leonard E. Gerlowski, John R. Kastelic
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Patent number: 5077381Abstract: A process for preparing polyamides of substantially constant cyclic dimer concentration from amide monomers includes extracting unreacted amide monomers and oligomers, reducing the oligomer concentration relative to the concentration of total extractants and then returning the extract to the reaction vessel in substantially the same total proportion as extracted.Type: GrantFiled: June 1, 1990Date of Patent: December 31, 1991Assignee: BASF CorporationInventor: Jack A. Dellinger
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Patent number: 5075344Abstract: This invention provides an improved process for producing a superabsorbent polymer with reduced residual monomer content which comprises partially drying a crosslinked, partially neutralized polymer gel, then raising the temperature of the gel using microwaves or RF radiation in the absence of circulating air and thereafter completing the drying.Type: GrantFiled: May 20, 1991Date of Patent: December 24, 1991Assignee: The Dow Chemical CompanyInventor: Thomas C. Johnson
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Patent number: 5073612Abstract: A hydrophilic polymer having the water absorption capacity thereof 1 to 30 times to its own weight by a process of manufacture which comprises preparing a monomer component comprising (a) 2 to 25 mol % of a hydroxyl group-containing alpha,beta-ethylenically unsaturated monomer, (b) 5 to 30 mol % of a carboxyl group-containing alpha,beta-ethylenically unsaturated monomer, and (c) 93 to 45 mol % of a carboxylate group-containing alpha,beta-ethylenically unsaturated monomer, providing that the total of (b) and (c) is in the range of 98 to 75 mol %, radically polymerizing said monomer component, and heat-treating the resultant polymer thereby causing the hydroxyl group and carboxyl group possessed by the polymer to react with each other and form a crosslinked structure, a method for the production thereof, and uses found therefor including a cation sequestrating resin, a coolant and a coating material.Type: GrantFiled: December 27, 1988Date of Patent: December 17, 1991Assignee: Nippon Shokubai Kagaku Kogyo, Co., Ltd.Inventors: Yoshio Irie, Shigeyasu Morihiro, Teruaki Fujiwara, Masazumi Sasabe, Kaoru Iwasaki
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Patent number: 5071953Abstract: An amorphous and excellently moldable styrene-based polymer having a syndiotactic structure can be obtained when a styrene-based polymer having a substantially syndiotactic structure is dissolved in a solvent followed by separation and recovery of the polymer from the solution or melt thereof is quenched. Shaping the same gives various kinds of shaped articles having excellent mechanical strengths and heat resistance. Physical properties of the shaped articles can be further improved by a modification treatment.Type: GrantFiled: May 11, 1989Date of Patent: December 10, 1991Assignee: Idemitsu Kosan Company LimitedInventors: Akikazu Nakano, Masahiko Kuramoto, Masakazu Suzuki, Michihiro Sawada
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Patent number: 5068311Abstract: The invention relates to high molecular weight thermoplastically deformable branched aliphatic polyamides prepared by polycondensation of lactams and/or polyamide-forming diamine/dicarboxylic acid reaction mixtures and/or amino acids in the presence of small amounts of specific diamino-alcohols and approximately equivalent amounts of polycarboxylic acids (preferably dicarboxylic acids), and to a process for their preparation, which is distinguished by considerably shortened polycondensation times, without crosslinked products being formed. If appropriate, the process additionally utilizes a solid phase after-condensation, in which rapid further condensation to products which are indeed branched but are soluble in m-cresol and have an increased melt viscosity takes place.Type: GrantFiled: June 15, 1990Date of Patent: November 26, 1991Assignee: Bayer AktiengesellschaftInventors: Klaus Horn, Hans-Detlef Heinz, Peter-Rolf Muller, Ralf Dujardin
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Patent number: 5066780Abstract: A heat transfer liquid in the form of a molten salt mixture includes a mixture of potassium nitrate and lithium nitrate, and added calcium nitrate and/or anhydrous salts if appropriate. This is done in order to achieve a low melting point, a low toxicity and in particular a low viscosity. The heat transfer liquid may be used in the vulcanization of rubber.Type: GrantFiled: October 12, 1989Date of Patent: November 19, 1991Assignee: Metzeler GmbHInventor: Werner Michel
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Patent number: 5066781Abstract: This invention relates to new straight chained and branched copolyarylene sulphides with built-in aromatic or araliphatic comonomers containing phosphine groups and to products obtainable from the phosphine group-containing polyarylene sulphides by a special heat treatment.Type: GrantFiled: July 16, 1990Date of Patent: November 19, 1991Assignee: Bayer AktiengesellschaftInventors: Burkhard Kohler, Rolf-Volker Meyer
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Patent number: 5064786Abstract: Polysilacyclobutasilazanes are reacted with chlorosilanes and/or chlorodisilanes and ammonia to provide silane-modified polysilacyclobutasilazanes having silacycles incorporated in the polymer, which silacycles are subseqentially used to cross-link the silazanes.Type: GrantFiled: February 15, 1990Date of Patent: November 12, 1991Assignee: Dow Corning CorporationInventor: Gary T. Burns
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Patent number: 5051456Abstract: A process for removing diene from ethylene propylene diene monomer resin by subjecting said resin containing diene monomer to microwave energy in an amount for a time sufficient to evolve diene vapors while simultaneously passing a gas through said resin to removing said evolved diene vapors.Type: GrantFiled: March 30, 1990Date of Patent: September 24, 1991Assignee: Union Carbide Chemicals and Plastics Technology CorporationInventors: Robert J. N. Bernier, David N. Edwards, Richard W. Wegman
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Patent number: 5049651Abstract: The invention relates to a process for the solid phase post-condensation of (co)polyamides which contain small amounts of lysine components and about equivalent amounts thereto of a polycarboxylic acid incorporated. Thermoplastically deformable, slightly branched aliphatic (co)polyamides having increased melt viscosity and pronounced pseudoplasticity are obtained in a shortened reaction time. The invention also relates to solid phase post-condensed (co)polyamides of this type.Type: GrantFiled: September 1, 1989Date of Patent: September 17, 1991Assignee: Bayer AktiengesellschaftInventors: Hans-Detlef Heinz, Rolf-Volker Meyer
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Patent number: 5045629Abstract: A method for recovering a crystalline poly(arylene sulfide) from a slurry comprising a particulate poly(arylene sulfide), a polar organic compound, and water, said method comprising:(a) substantially liquefying said particulate poly(arylene sulfide) to form a liquid mixture comprising said substantially liquified poly(arylene sulfide) and said polar organic compound;(b) contacting said liquid mixture with a vaporized separation agent in an amount sufficient to effect a separation between said poly(arylene sulfide) and said polar organic compound;(c) reducing the temperature of said liquid mixture sufficiently to solidify said substantially liquified poly(arylene sulfide) to form a slurry comprising a particulate poly(arylene sulfide); and(d) recovering said particulate poly(arylene sulfide) from said slurry.Type: GrantFiled: May 8, 1989Date of Patent: September 3, 1991Assignee: Phillips Petroleum CompanyInventor: Afif M. Nesheiwat
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Patent number: 5043414Abstract: Alkylperoxyformate-terminated polycarbonates are prepared by the reaction of an aromatic dihydroxy compound, preferably a bisphenol, with phosgene in one or two steps, in the presence of an alkyl hydroperoxide such as t-butyl or 2-phenyl-2-propyl hydroperoxide. The alkylperoxyformate-terminated polycarbonates may be converted to hydroxy-terminated polycarbonates by heating in the melt.Type: GrantFiled: August 28, 1989Date of Patent: August 27, 1991Assignee: General Electric CompanyInventor: Edward J. Fewkes, Jr.
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Patent number: 5041532Abstract: A method of making a poly(arylene sulfide/sulfone) resin comprises heating amorphous poly(arylene sulfide/sulfone) resin at an elevated temperature but below the melting temperature of the resin in a vacuum environment so that extrudate made from the resin is smooth and has reduced gas bubble content. The invention also relates to poly(arylene sulfide/sulfone) resin made in accordance with the method.Type: GrantFiled: April 23, 1990Date of Patent: August 20, 1991Assignee: Phillips Petroleum CompanyInventors: Afif M. Nesheiwat, Rex L. Bobsein
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Patent number: 5041529Abstract: The invention relates to a process for the preparation of a bioabsorbable polyester comprising reacting said polyester under reduced pressure in the reaction system while maintaining said polyester in the molten state during the second half of the polymerization reaction or after completion of the reaction and obtaining said polyester which contain almost no residue of unreacted monomers and volatile ingredients of low molecular weight.Type: GrantFiled: October 27, 1989Date of Patent: August 20, 1991Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Hosei Shinoda, Masami Ohtaguro
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Patent number: 5039788Abstract: A phenylene sulfide/sulfone polymer with relatively good melt stability and a method of producing such a polymer are provided. A previously produced phenylene sulfide/sulfone polymer is redissolved in N-methyl-2-pyrrolidone to form a solution. This solution is combined with an alcohol to precipitate highly melt stable phenylene sulfide/sulfone polymer in a particulate form. The alcohol has one to four carbon atoms, such as methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, and the like and mixtures thereof.Type: GrantFiled: April 2, 1990Date of Patent: August 13, 1991Assignee: Phillips Petroleum CompanyInventors: Rex L. Bobsein, Robert W. Campbell, Harold D. Yelton, Michael C. Yu
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Patent number: 5037951Abstract: An improved process for producing biphenylene sulfide comprising reacting difluorobiphenyl with an alkali metal sulfide in a polar organic compound. The resulting polymer has a high melting point and fiber composites formed therefrom have excellent mechanical properties.Type: GrantFiled: September 28, 1989Date of Patent: August 6, 1991Assignee: Phillips Petroleum CompanyInventors: Michael C. Yu, Harold D. Yelton