Material Contains A Polyvalent Metal Atom Patents (Class 528/319)
  • Patent number: 11866534
    Abstract: The present invention relates to: a dicyclopentadiene-based resin having excellent compatibility with a base resin and prepared by being copolymerized with a monomer composition comprising a dicyclopentadiene-based monomer and a vinylamide-based monomer; a dicyclopentadiene-based hydrogenated resin; and an adhesive resin composition comprising same. A dicyclopentadiene-based resin according to the present invention is advantageous in terms of having excellent compatibility with various base resins and being providable as an adhesive resin composition capable of achieving remarkably improved adhesive strength.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: January 9, 2024
    Assignee: HANWHA SOLUTIONS CORPORATION
    Inventors: Hyeonuk Kang, Do Hyun Byun, Kyongjun Yoon
  • Patent number: 11814480
    Abstract: The present invention provides a method for producing a polyamide with controlled activator addition, and a polyamide produced thereby, the method allowing a polymerization conversion rate and a polydispersity index (PDI) to be enhanced by controlling the addition of an activator so as to prevent a gelation phenomenon that occurs during anionic polymerization.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: November 14, 2023
    Assignee: HANWHA CHEMICAL CORPORATION
    Inventors: Hye Yeon Lee, Do Kyoung Kim, Seung Hoe Do, Jin Seo Lee, Kyung Ho Kwon, Dae Hak Kim, Kyoung Won Yim
  • Patent number: 11718713
    Abstract: The present invention relates to a method for producing a polyamide by coordinated anionic ring-opening polymerization and a polyamide produced thereby, wherein metal alkoxide as an initiator and metal hydride as a catalyst are added to enable polymerization having a narrow molecular weight distribution and uniform molecular weight within a short polymerization reaction time at a low temperature, without a separate vacuum process, as compared with an existing polymerization method.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: August 8, 2023
    Assignee: HANWHA CHEMICAL CORPORATION
    Inventors: Hye Yeon Lee, Dae Hak Kim, Seung Hoe Do, Jin Seo Lee, Kyung Ho Kwon, Kyoung Won Yim, Do Kyoung Kim
  • Patent number: 11629243
    Abstract: A polyamide resin composition makes it possible to obtain a molded article having excellent fluidity, excellent prying strength, and excellent adhesivity with metal. The polyamide resin composition includes 100 parts by mass of a polyamide resin (A) and 0.1 part by mass or more and 10 parts by mass or less of an ammonium salt (B) composed of a C6-12 aliphatic dicarboxylic acid and ammonia.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: April 18, 2023
    Assignee: Toray Industries, Inc.
    Inventors: Nobuhiro Morioka, Akiyoshi Tamai, Hideyuki Umetsu
  • Patent number: 11375952
    Abstract: An adhesive hydrogel has low contact resistance against the body surface and excellent conformability and adhesiveness to the body surface, so that noise generation can be reduced. Such adhesive hydrogel enables measurements of weak fetal heart rate signals. The adhesive hydrogel includes a polymer matrix prepared by crosslinking-copolymerization of an acrylamide derivative, which is a nonionic polymerizable monomer including a polymerizable carbon-carbon double bond in a molecule, and polyfunctional (meth)acrylamide, which is a crosslinkable monomer comprising 2 or more polymerizable carbon-carbon double bonds in a molecule, water, a polyvalent alcohol, and an electrolyte salt, wherein a laminate of the adhesive hydrogel with an Ag/AgCl sheet exhibits the impedance of 1? to 100? at the frequency of 0.1 Hz measured in accordance with the method of ANSI/AAMI EC12:2000, and the dynamic elastic modulus G? at the frequency of 1 Hz measured at 25° C. and dispersed frequencies is 1.0×103 Pa to 1.0×104 Pa.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: July 5, 2022
    Assignee: SEKISUI PLASTICS CO., LTD.
    Inventors: Takaaki Hatori, Takahiko Fujita, Kazuhiro Yoshikawa
  • Patent number: 10189973
    Abstract: The present invention provides an LCP derivative/soft magnetic ferrite composite material, which is prepared by complexing and assembling an LCP derivative as a host and soft magnetic ferrite particles as a guest. The present invention also provides a method for preparing the composite material. The composite material of the present invention has high stability and is not easily dissociated, and has high customized magnestic permeability, dielectricity, thermal stability, environmental resistance, and chemical resistance; and the preparation process of the composite material meets the energy-saving and emission reduction requirements. Therefore, the composite material has a wide industrial application prospect. The composite material of the present invention can be widely applied to the wireless communication field, the aviation, spaceflight and military fields, the microwave and radio frequency component application field, the automotive electronic component field, and the like.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: January 29, 2019
    Assignee: YUNNAN INFINE NEO-MATERIAL CO., LTD
    Inventors: Mengjiang Xing, Mingang Zheng
  • Patent number: 10030083
    Abstract: A method for preparing a functionalized polymer, the method comprising the steps of: (i) polymerizing monomer to form a reactive polymer, and (ii) reacting the reactive polymer with a protected oxime compound containing a cyano group.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: July 24, 2018
    Assignee: Bridgestone Corporation
    Inventors: Steven Luo, Joshua S. Dickstein
  • Patent number: 9101131
    Abstract: The present invention generally relates to aqueous seed treatment formulations comprising from about 0.2 to about 15% of at least one pesticidal agent, from about 0.1 to about 0.45% of at least one graft copolymer, at least one polyvinyl alcohol (PVA), and from about 5 to about 30% of at least one plasticizer. The present invention also relates to aqueous seed treatment formulations wherein the pesticidal agents are clothianidin, metconazole, and metalaxyl.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: August 11, 2015
    Assignee: Valent U.S.A., Corporation
    Inventors: Karen S. Arthur, Frank Gonzales, Michael Seitz, Toshiya Ogawa
  • Patent number: 8772438
    Abstract: A process for making a polyamide polymer, said process comprising heating, in one or more ionic liquid(s), one or more polyamide precursor(s) selected from: (i) one or more free dicarboxylic acid(s) or ester(s) thereof, with one or more diamine(s); or (ii) one or more salt(s) of a dicarboxylic acid with a diamine; or (iii) one or more lactam(s); or (iv) mixtures of any of the foregoing precursors (i) to (iii).
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: July 8, 2014
    Assignee: Invista North America S.är.l.
    Inventors: Keith Whiston, Charles Richard Langrick, Kenneth Richard Seddon, Alberto V. Puga
  • Publication number: 20130085255
    Abstract: Provided herein are processes for preparing caprolactam from a starting material such as one or more of the cis,cis-, cis,trans- and trans,trans-double-bond isomers of muconamide, muconic acid ester, or muconic acid. The starting material, intermediates, and caprolactam prepared therefrom can contain carbon atoms derived from biomass containing detectable 14C content determined according to ASTM D6866 and optionally containing a 14C content up to 0.0000000001% (one part per trillion). Caprolactam so prepared can be used to make various polyamides.
    Type: Application
    Filed: April 9, 2012
    Publication date: April 4, 2013
    Applicant: Amyris, Inc.
    Inventors: Laetitia Coudray, Vu Bui, John W. Frost, Dirk Schweitzer
  • Patent number: 8129478
    Abstract: Biodegradable polymers formed from biodegradable polyester-based prepolymers, to which ring-structured anhydrides which have different hydrophobicities have been connected, and which are either coupled to form linear thermoplastic polyester anhydrides or cross-linked to form network-structured polyester anhydrides. It is possible to adjust widely the degradation rate and mechanism of the polymers and thus they can be used, for example, in the controlled dosing of pharmaceutical ingredients, for tissue technological applications, in surgery and in bioactive composites.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: March 6, 2012
    Assignee: JVS-Polymers Oy
    Inventors: Jukka Seppälä, Risto Hakala, Harri Korhonen
  • Patent number: 8034396
    Abstract: The present disclosure provides compositions which may be utilized as adhesives or sealants in medical and surgical applications. The compositions may, in embodiments, be formed from the cycloaddition reaction of a first component possessing at least one azide group with a second component possessing at least one alkyne group.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: October 11, 2011
    Assignee: Tyco Healthcare Group LP
    Inventors: Mbiya Kapiamba, Nadya Belcheva
  • Publication number: 20100280217
    Abstract: A method for preparing a functionalized polymer, the method comprising the steps of preparing a reactive polymer and reacting the reactive polymer with a heterocyclic nitrile compound.
    Type: Application
    Filed: October 14, 2008
    Publication date: November 4, 2010
    Inventors: Steven Luo, Ryouji Tanaka, Kouichirou Tani
  • Publication number: 20100280216
    Abstract: The present invention relates to a method of preparing porous solids, which method comprises polymerizing, in a salt melt or a eutectic mixture of salt melt containing at least one Lewis acidic salt, cyano monomers having at least one or at least two cyano groups in their molecule, wherein the at least one or at least two cyano groups are bonded to a rigid linking group in the cyano monomer, as well as to the porous solids obtainable by that method. Owing to their porosity and the associated extremely high specific surface area, the porous solids are useful as sorbents, filtering and insulating materials, as well as catalyst carriers.
    Type: Application
    Filed: June 16, 2008
    Publication date: November 4, 2010
    Applicant: MAX-PLANCK-GESELLSCHAFT ZUR FOERDERUNG DER WISSENSCHAFTEN E.V.
    Inventors: Markus Antonietti, Arne Thomas, Pierre Kuhn
  • Publication number: 20100121022
    Abstract: A process for the bulk polymerization, in the absence of any solvent, of a reactant containing azide functionality and a reactant containing a terminal alkyne functionality, in the presence of Cu (I) catalyst or in the presence of a Cu(II) catalyst without a reducing agent, is described. Polymerization can be achieved at temperatures less than 100° C., which is suitable for low temperature cures. A controlled synthesis for low molecular weight oligomers is disclosed.
    Type: Application
    Filed: July 26, 2007
    Publication date: May 13, 2010
    Inventors: Osama M. Musa, Laxmisha M. Sridhar, Qingwen Wendy Yuan-Huffman
  • Publication number: 20090146289
    Abstract: Dendrimer/hyperbranched materials are combined with polyimide to form a low CTE material for use as a dielectric substrate layer or an underfill. In the alternative, ruthenium carbene complexes are used to catalyze ROMP cross-linking reactions in polyimides to produce a class of cross-linkable, thermal and mechanical stable material for use as a dielectric substrate or underfill. In another alternative, dendrimers/hyperbranched materials are synthesized by different methods to produce low viscosity, high Tg, fast curing, mechanically and chemically stable materials for imprinting applications.
    Type: Application
    Filed: January 28, 2009
    Publication date: June 11, 2009
    Inventors: Stephen E. Lehman, JR., James C. Matayabas, JR., Saikumar Jayaraman
  • Patent number: 7470765
    Abstract: A process for preparing a polyamide by reacting a mixture which comprises a monomer which has a nitrile group and has at least one other functional group capable of forming a carboxamide group, and comprises water, in the presence of titanium dioxide as catalyst, which comprises using titanium dioxide whose BET surface area, determined to the German standard DIN 66 131 volumetrically by the multipoint method, is in the range from 5 to 35 m2/g.
    Type: Grant
    Filed: April 8, 2003
    Date of Patent: December 30, 2008
    Assignee: BASF Aktiengesellschaft
    Inventors: Helmut Winterling, Christoph Benisch, Thilo Hahn
  • Patent number: 7230067
    Abstract: In the present invention, a masterbatch is produced by melt-mixing a metal compound (B) with a reactive thermoplastic resin (C). The oxidizable polyamide (A) is produced by polycondensing a diamine component containing m-xylylenediamine in an amount of 70 mol % or higher with a dicarboxylic acid component containing adipic acid in an amount of 50 mol % or higher. The metal compound (B) contains at least one metal selected from the group consisting of transition metals in group VIII of the periodic table, manganese, copper and zinc. The reactive thermoplastic resin (C) has an internal bond and/or a reactive functional group which are reactive with an amide bond and/or a reactive functional group of the oxidizable polyamide (A). The masterbatch exhibits a stable moldability. The masterbatch is melt-mixed with an oxidizable polyamide (A) and formed into a molded article which exhibits an excellent oxygen-absorbing ability irrespective of the preservation conditions of the masterbatch.
    Type: Grant
    Filed: May 28, 2004
    Date of Patent: June 12, 2007
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventor: Ryoji Otaki
  • Patent number: 7157204
    Abstract: A soluble polyimide for a photosensitive polyimide precursor and a photosensitive polyimide precursor composition including the soluble polyimide, wherein the soluble polyimide contains hydroxyl and acetyl moieties and at least one reactive end-cap group at one or both ends of the polymer chain. The photosensitive polyimide precursor composition comprises the soluble polyimide, a polyamic acid containing at least one reactive end-cap group at one or both ends of the polymer chain, a photo acid generator (PAG) and optionally a dissolution inhibitor. Since the polyimide film of the present invention exhibits excellent thermal, electric and mechanical properties, it can be used as insulating films or protective films for various electronic devices. A pattern with a high resolution may be formed even on the polyamide film having a thickness of above 10 ?m.
    Type: Grant
    Filed: November 7, 2003
    Date of Patent: January 2, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Myung Sup Jung, Yong Young Park, Sung Kyung Jung, Sang Yoon Yang
  • Patent number: 7101959
    Abstract: A subject of the present invention is new compounds having a lanthanide and having a tridentate ligand, a process for their preparation and their use in particular as polymerization catalysts.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: September 5, 2006
    Assignees: Societe de Conseils de Recherches et d'Applications Scientifiques (S.C.R.A.S.), Centre National de la Recherche Scientifique (C.N.R.S.)
    Inventors: Anca Dumitrescu, Heinz Gornitzka, Blanca Martin-Vaca, Didier Bourissou, Guy Bertrand, Jean-Bernard Cazaux
  • Patent number: 7074851
    Abstract: The invention relates to a process for preparing stabilized compositions based on polyamide. The stabilizer is a phosphorus stabilizer selected from phosphorous acid and hypophosphorous acid. It is introduced before or during the polymerization of the polyamide. The use of these stabilizers prevents foaming phenomena.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: July 11, 2006
    Assignee: Nylstar S.A.
    Inventors: Thierry Charbonneaux, Jean-François Thierry
  • Patent number: 6709750
    Abstract: The invention relates to a hot-melt adhesive for sealing the edge of laminated glass that has been produced according to cast-resin technology. The inventive adhesive comprises acrylate or metacrylate homopolymers or copolymers or mixtures thereof. The invention also relates to a method for the production and to the uses of said hot-melt adhesive.
    Type: Grant
    Filed: February 22, 2001
    Date of Patent: March 23, 2004
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Thomas Pohlmann, Michael Schwamb
  • Patent number: 6703476
    Abstract: Polyamides are prepared from aminonitriles and water by (1) reacting the aminonitriles with water at from 180 to 350° C. and such a pressure in the range from 30 to 120 bar that a gaseous phase is present as well as a liquid phase, in a first reaction stage, (2) expanding the reaction mixture obtained in the first reaction stage via an evaporator zone or adiabatically with removal of water and ammonia into a second reaction stage, and (3) postcondensing in the second reaction stage at from 0.1 mbar to 5 bar and from 230 to 320° C.
    Type: Grant
    Filed: June 24, 2002
    Date of Patent: March 9, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Ralf Mohrschladt, Helmut Winterling, Dieter Krauss
  • Patent number: 6531566
    Abstract: A polyoxyalkylene polyol or monool (I) of the general formula (1) below, in which not less than 40% of the terminally located hydroxyl-containing groups, namely —AO—H groups, are primary hydroxyl-containing groups of the general formula (2) below, or; a method of producing ring-opening polymerization products, by subjecting a heterocyclic compound to ring-opening addition polymerization with an active hydrogen-containing compound, using as a catalyst tris(pentafluorophenyl)borane, tris(pentafluorophenyl)aluminum, etc.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: March 11, 2003
    Assignee: Sanyo Chemical Industries, Ltd.
    Inventor: Munekazu Satake
  • Patent number: 6525167
    Abstract: The continuous process for producing polyamides by reacting at least one aminonitrile with water comprises the following steps: (10) reacting at least one aminonitrile with water at a temperature of from 200 to 290° C. at a pressure of from 40 to 70 bar in a flow tube containing a Brönsted acid catalyst selected from a beta-zeolite, sheet-silicate or metal oxide catalyst in the form of a fixed bed, (11) diabatically or adiabatically expanding the reaction mixture from step (1) into a first separation zone to a pressure of from 20 to 40 bar, the pressure being at least 10 bar lower than the pressure in step (1), and to a temperature within the range from 220 to 290° C. by flash evaporation and removal of ammonia, water and any aminonitrile monomer and oligomer, (12) further reacting the reaction mixture from step (2) in the presence of water at a temperature of from 200 to 290° C.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: February 25, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Ralf Mohrschladt, Volker Hildebrandt, Motonori Yamamoto
  • Patent number: 6437089
    Abstract: Process for making nylon 6 in which a feed stream containing a major portion of caprolactam and/or nylon 6 prepolymer and a minor portion of aminocapronitrile is fed to a multistage reactive distillation column in which the feed stream flows countercurrently to a steam stream.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: August 20, 2002
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Jeffrey D. Cohen, Stuart B. Fergusson, Ernest Keith Marchildon, David N. Marks, Ahmet Turgut Mutel
  • Publication number: 20020042498
    Abstract: (Co)polyamides, for example the polyamides 6 and 66, are prepared via the improvedly catalyzed polycondensation of (co)polyamide-forming (co)monomers, even in the presence of normally catalyst-inhibiting matting agents (e.g., microparticulate TiO2), the catalyst therefor comprising solid nanometric TiO2 particulates having diameters of less than 100 nm.
    Type: Application
    Filed: June 25, 2001
    Publication date: April 11, 2002
    Inventors: Dominique Kayser, Jean-Francois Thierry, Joel Varlet
  • Patent number: 6353085
    Abstract: In a process for producing polyamides by polymerization of lactams in the presence of metal oxides as heterogeneous catalysts, the metal oxides are used in a form which permits mechanical removal from the reaction mixture and are removed from the reaction mixture in the course of or on completion of the polymerization.
    Type: Grant
    Filed: August 16, 2000
    Date of Patent: March 5, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Ralf Mohrschladt, Volker Hildebrandt, Gunter Pipper, Eberhard Fuchs
  • Patent number: 6337370
    Abstract: Disclosed are inorganic-organic copolymers and their preparation using polyvinylalcohol-silane coupling agents. The inorganic-organic copolymers can be prepared through the reaction of silane-coupling agents containing hydroxy groups and silane groups with organic metal compounds. The inorganic-organic copolymers are of high transparency as well as shows superb moisture barrier characteristics and hydrophilicity and can be applied as resins or film coatings for many fields, including anti-fogging agents, anti-foaming agents, lubricants, paints, anti-corrosive coatings, water-resistant coatings, plastic or metal-protective coatings.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: January 8, 2002
    Assignee: Korean Advanced Institute of Science and Technology
    Inventors: Byeong Soo Bae, Yoon Ki Choi, Young Joo Eo, Oun Ho Park
  • Patent number: 6291598
    Abstract: A polymerized material produced by the polymerization of an organic amide monomer in the presence of an organic carbonate and a process for the preparation thereof. The process comprises the steps of: heating an amount of the organic anide monomer to a temperature above its melting point; first mixing an amount of an anionic initiator with at least a portion of the amount of heated organic amide mnonomer to produce an amount of activated monomer, wherein the anionic initiator is not comprised of an alkali metal; second mixing an amount of the organic carbonate with at least a portion of the amount of heated organic amide monomer to produce an amount of dissolved organic carbonate; and polymerizing the amounts of heated organic amide monomer and activated monomer in the presence of the amount of dissolved organic carbonate to produce the polymerized material.
    Type: Grant
    Filed: October 18, 1999
    Date of Patent: September 18, 2001
    Inventors: Michael C. Williams, Nai-Hong Li, Yatin Sankholkar
  • Patent number: 6288207
    Abstract: The continuous process for producing a polyamide by reacting at least one aminonitrile with water comprises the following steps: (1) reacting at least one aminonitrile with water at a temperature from 90 to 400° C. and a pressure from 0.1 to 15×106 Pa in a flow tube containing packing elements of a Brönsted acid catalyst selected from beta-zeolite, sheet-silicate or titanium dioxide packing elements and metallic packing elements to obtain a reaction mixture, (2) further reacting the reaction mixture at from 150 to 400° C.
    Type: Grant
    Filed: July 25, 2000
    Date of Patent: September 11, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Ralf Mohrschladt, Dieter Krauss, Volker Hildebrandt
  • Patent number: 6174988
    Abstract: This invention relates to an adhesive composition which comprises (a) an adhesive carrier, and (b) an adhesively effective amount of a polyamino acid salt selected from the group consisting of polyaspartic acid salts, polyglutamic acid salts, and copolymers of polyaspartic acid salts with polyglutamic acid salts, and mixtures thereof. The present invention also pertains to an article to which the adhesive composition has been applied, a method for adhering a first substrate to a second substrate employing the polyamino acid salts, and to an improved method for making polyamino acid salts.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: January 16, 2001
    Assignee: National Starch & Chemical Company
    Inventors: Jacob J. Guth, Niketa S. Lad, Carmine Iovine, Mitchell Blumenthal
  • Patent number: 6166171
    Abstract: A polyamide resin composition comprising 100 parts by weight of a polyamide resin and 0.005 to 1.0 part by weight of at least one compound selected from the group consisting of a metal salt of a fatty acid, a diamide compound and a diester compound. The polyamide resin is obtained by solid phase-polymerizing a polyamide resin prepared by melt-polymerizing a diamine component containing 70 mol % or more of metaxylylenediamine and a dicarboxylic acid component containing 70 mol % or more of adipic acid, and preferably has a relative viscosity of 2.3 to 4.2 when measured at 25.degree. C. using a solution of 1 g polyamide resin in 100 ml of 96% sulfuric acid.
    Type: Grant
    Filed: March 1, 1999
    Date of Patent: December 26, 2000
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Koji Yamamoto, Makoto Takahashi, Hisashi Shimazaki, Katsuya Maruyama
  • Patent number: 6129982
    Abstract: In a heat-resistant aromatic polyimide/metal (or metal oxide) composite sheet composed of an aromatic polyimide film and a metal or metal oxide layer arranged on the film, the polyimide film is composed of an aromatic polyimide resin and an Al-containing material dispersed in the polyimide resin in an amount of 1 to 1,000 ppm per the amount of polyimide film, and the metal or metal oxide layer is formed on the polyimide film via no adhesive.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: October 10, 2000
    Assignee: Ube Industries, Ltd.
    Inventors: Hiroaki Yamaguchi, Hideki Ozawa, Hideharu Watakabe, Toshihiko Anno
  • Patent number: 5929200
    Abstract: Incorporation of certain phosphorus compounds in conjunction with certain multivalent metal compounds into a polyamide melt or a polyamide manufacturing polymerization process results in a polyamide having improved color properties.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: July 27, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Rolando Umali Pagilagan
  • Patent number: 5859178
    Abstract: A process for the polymerization of caprolactam to nylon-6 polymer, comprising the use of a polymerization accelerator having the structural formula ##STR1## wherein R.sup.1, R.sub.2, R.sub.3 and R.sub.4 are alkyl, aryl and aralkyl radicals and mixtures thereof, and X is a halogen ion other than iodide and the temperature of said polymerization process is carried out at between about room temperature and about 115.degree. C.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: January 12, 1999
    Assignee: Puritek, Inc
    Inventors: Arthur G. Barnes, Kathy L. Gottlund
  • Patent number: 5830984
    Abstract: Optically active ladder polymers that are chiral and have an unbroken network of conjugated double bonds along a helical path are synthesized.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: November 3, 1998
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Thomas J. Katz, Yujia Dai
  • Patent number: 5776875
    Abstract: A biodegradable scale inhibitor and dispersant is provided. The scale inhibitor includes a copolymer comprising at least one of N-oxygenatedhydrocarbonamide monomers and at least one of amino acid monomers. A method of reducing scale build-up on heating exchanger surfaces that come in contact with an industrial water is provided by adding a copolymer comprising at least one of N-oxygenatedhydrocarbonamide monomers and at least one of amino acid monomers to the water system such as cooling towers.
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: July 7, 1998
    Assignee: Nalco Chemical Company
    Inventors: Jiansheng Tang, Ronald V. Davis
  • Patent number: 5744125
    Abstract: Disclosed are cosmetic melanins of different colors produced by procedures involving oxidative polymerization of monomeric precursors of melanin and/or co-monomers that enhance substantivity or adherence of the melanins to the skin and hair. Also disclosed are methods for preparing cosmetic melanins and methods for using these compositions topically to produce a natural-appearing tan and to prevent damage to skin caused by UV exposure.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: April 28, 1998
    Assignee: Yale University
    Inventors: John M. Pawelek, James T. Platt
  • Patent number: 5712331
    Abstract: A curable resin system in supercritical carbon dioxide as diluent includes an epoxy resin, a co-reactant selected from poly N-substituted aziridines, and a catalyst to promote cure at ambient temperature. The system is compatible with various epoxy resins such as bisphenol A epoxy, bisphenol F epoxy, novolac epoxy, cycloaliphatic epoxy, triglycidyl-aminophenol, and triglycidyl isocyanurate. The aziridine co-reactant may be selected from reaction products of NH aziridines with acrylates and methacrylates of trimethylolpropane, ethylene glycol, propylene glycol, bisphenol A, bisphenol F, pentaerythritol, glycerol, and their alkoxylated derivatives; reaction products of NH aziridines with epoxy compounds; and 1-aziridine ethanol and its reaction products with epoxy and isocyanate functional compounds. Suitable catalysts include acid salts and complexes, strong electron accepting compounds, combinations of silicon hydrides and metal complexes, and non-halogen containing boron derivatives.
    Type: Grant
    Filed: August 15, 1995
    Date of Patent: January 27, 1998
    Assignee: Rockwell International Corporation
    Inventor: Hong-Son Ryang
  • Patent number: 5668234
    Abstract: Acrylate monomers such as methyl methacrylate, or other suitable monomers such as lactams, lactones, or acrylamides, are polymerized by reaction injection molding (RIM) utilizing a combination of organo group-4 catalysts, e.g., a neutral organo catalyst and a cationic organo catalyst. Preferably a Lewis acid is utilized which reacts with the neutral organo catalyst and forms in situ the cationic organo catalyst. Significant exotherms are rapidly generated and result in short cure times and typically in high conversions of at least 95 percent by weight of the monomer. The catalysts of the present invention give good control of tacticity and thus high Tg polymers such as syndiotactic methyl methacrylate can be produced.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: September 16, 1997
    Inventors: Larry Funderburk Rhodes, Brian Leslie Goodall, Scott Collins
  • Patent number: 5650482
    Abstract: An at least two-step process for the preparation of polyamide resins wherein, in the first step, polyvalent carboxylic acids, optionally together with monovalent carboxylic acids, are reacted with a stoichiometric deficiency of polyamines in the presence of an organic solvent which forms an azeotrope with water, water is distilled off, and the reaction is controlled by means of the amount of water formed by the condensation reaction and, optionally, by the imidazoline formation. After removal of the theoretical amount of water or a lesser amount, in a further step more amine is added to the reaction mixture in an amount sufficient to achieve a final amine number of 10 to 300 mgKOH/g, the reaction is continued, substantially all of the residual water is removed, and the residual solvent is completely or partially removed.
    Type: Grant
    Filed: September 27, 1995
    Date of Patent: July 22, 1997
    Assignee: Air Products and Chemicals, Inc.
    Inventor: William Rene Eduard Raymond
  • Patent number: 5627257
    Abstract: Process for synthesis of spinnable polyamide from .alpha., .omega.-alkyldinitriles and .alpha., .omega.-alkyldiamines and excess water, where a) the aqueous solution of the dinitrile is mixed with a catalytic amount of at least one oxygen-containing acid of phosphorus and/or a water-soluble salt of calcium, zinc, cadmium or manganese in the absence of the diamine, and the pH of this solution is adjusted to an initial value in the range of 2.0 to 4.0 before hydrolysis by adding a saturated aliphatic or aromatic dicarboxylic acid and the dinitrile is and the amide-containing precursors derived therefrom are hydrolyzed to dicarboxylic acid at an elevated temperature under autogenous pressure, whereby the hydrolysis is controlled by conductometric determination of the hydrolysate, and b) at least an equimolar amount of diamine is added to the solution from step a) and the mixture is subjected to polycondensation to form polyamide [nylon].
    Type: Grant
    Filed: February 12, 1996
    Date of Patent: May 6, 1997
    Assignee: Zimmer Aktiengesellschaft
    Inventor: Hartmut Liehr
  • Patent number: 5599898
    Abstract: Abstract of the Disclosure: Insoluble, only slightly swellable polymers containing amino groups, which can be obtained from popcorn polymers containing units of the structure ##STR1## where R and R.sup.1 are H or C.sub.1 -C.sub.4 -alkyl, by eliminating the group R--CO-- from at least 2% of the incorporated units of the structure I, with the formation of units of the structure II ##STR2## a process for the preparation of the amino-containing popcorn polymers by polymerizing N-vinylcarboxamides and, if desired, other monoethylenically unsaturated monomers copolymerizable therewith with from 0.
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: February 4, 1997
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinrich Hartmann, Walter Denzinger, Michael Kroener, Claudia Nilz
  • Patent number: 5554722
    Abstract: Aromatic polyamide compositions with improved electrostatic properties, formed structures produced therefrom, and use and production thereof.Described are compositions comprising an aromatic polyamide which is soluble in organic solvents and from 0.01 to 30% by weight, based on the weight of the composition, of an organic or organometallic charge control agent.The compositions can be used for producing formed structures, in particular fibers; these fibers are preferably used for producing webs which can be used for producing dust filters.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: September 10, 1996
    Assignee: Hoechst AG
    Inventors: Dieter Eichenauer, Werner Groh, Hans-Tobias Macholdt, Jorg Dahringer, Holger Jung, Richard Neuert
  • Patent number: 5545833
    Abstract: A polymer including as integral parts of polymer chain, amide groups of the formula ##STR1## and phosphinic acid-salt groups of the formula ##STR2## wherein a and b are both greater than or equal to 2 and M is selected from the group of metal cations where n=1 or n=2.The polymer of the present invention is particularly useful in forming stain-resistant fibers for carpet pile.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: August 13, 1996
    Assignee: Monsanto Company
    Inventor: John W. Stoddard
  • Patent number: 5530090
    Abstract: Macrocyclic oligomer mixtures, particularly polyimide oligomer mixtures, are prepared by the treatment of a dihalo-substituted organic compound or the like under reducing conditions, preferably by a complex of a zerovalent Group VIII metal. Cyclization takes place by reductive dehalogenation.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: June 25, 1996
    Assignee: General Electric Company
    Inventor: Farid F. Khouri
  • Patent number: 5438114
    Abstract: Macrocyclic polyimide oligomers are converted to linear polyimides by heating with a primary amine in the presence of a tertiary amine, tertiary phosphine, quaternary ammonium salt, quaternary phosphonium salt or hexaalkylguanidinium salt or heterocyclic analog thereof as a macrocyclic polyimide polymerization catalyst.
    Type: Grant
    Filed: June 17, 1994
    Date of Patent: August 1, 1995
    Assignee: General Electric Company
    Inventors: Dwain M. White, Jane M. Terry
  • Patent number: 5421982
    Abstract: An electrically conductive polymer gel is composed of a crosslinked polyacrylamide polymer including an electrolytic salt, water and a polyhydric alcohol uniformly dissolved therein, wherein the water and the polyhydric alcohol are major components of said polymer gel. The polyacrylamide series polymer in the gel has properties of being hydrophilic and being a nonelectrolyte. Therefore, a desirable connection between the gel and the electrode can be achieved with low impedance. Moreover, the polyhydric alcohol reduces the drying speed of the electrically conductive polymer gel, thereby preventing an increase in the impedance due to the dryout of the gel. Therefore, the electrically conductive polymer gel of the present invention permits an accurate measurement of an electrical phenomenon in an organism for long periods of time.
    Type: Grant
    Filed: September 13, 1993
    Date of Patent: June 6, 1995
    Assignee: Sekisui Kaseihin Kogyo Kabushiki Kaisha
    Inventors: Toshiki Ikeda, Yoshikazu Kobayashi, Shuichi Sasahara, Takashi Higashi
  • Patent number: 5380818
    Abstract: A novel aromatic diamino amide monomer of the structural formula (I), a novel aromatic polyamide of the structural formula (II) prepared by polycondensation of the monomer and an aromatic diacid halide, and an aromatic polyamide film produced from the polyamide which has high strength as well as high modulusity. ##STR1## wherein, each of two NH.sub.2 groups may be in meta or para-position to the amide bond. ##STR2## wherein, Ar represents a phenyl group, X represents CONH.sub.2 group in ortho-position to the amide bond, Y represents H, Cl, Br, I, NO.sub.2 or an alkyl or alkoxy group having 1 to 4 carbon atom, and n represents an integer between 10 and 100,000.
    Type: Grant
    Filed: July 16, 1993
    Date of Patent: January 10, 1995
    Assignee: Kolon Industries, Inc.
    Inventors: Tae-jin Oh, Jin-sa Kim