Polymerizing In The Presence Of A Specified Material Other Than A Reactant And Other Than Group Ia Or Group Iia Material As Sole Metal Atom Patents (Class 528/207)
  • Patent number: 10351667
    Abstract: Provided is a method for producing a non-colored polyester with a high molecular weight. The method is to produce a polyester represented by a general formula (2). This method comprises: a first step of heating, under the presence of an antimony catalyst, a compound represented by the general formula (1) at a heating temperature in a range of from a melting point of the compound to a temperature that is 10° C. higher than the melting point; and a second step of heating a solid product or viscous product obtained after the first step at a heating temperature in a range of from the melting point of the compound represented by the general formula (1) to 270° C.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: July 16, 2019
    Assignee: RIKEN
    Inventors: Koichiro Tachibana, Hideki Abe
  • Patent number: 9732224
    Abstract: The polymer mixture comprises polybenzimidazole (PBI)/polyvinylbutyral (PVB). The weight ratio (PVB:PBI) of this mixture may range from 0.25-50:50-99.75 or 15-85:15-85. The coating is based upon the polymer mixture.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: August 15, 2017
    Assignee: PBI Performance Products, Inc.
    Inventors: John C. Moore, Gregory S. Copeland, Michael Gruender
  • Patent number: 9283523
    Abstract: A pervaporation membrane may be an acid-resistant polybenzidimazole (PBI) membrane. The acid-resistant PBI membrane may be a PBI membrane chemically modified by a process selected from the group consisting of sulfonation, phosphonation, cross-linking, N-substitution, and/or combinations thereof. The membrane may be thermally stabilized. A method for the dehydration of an acid material may include the steps of: contacting an acidic aqueous solution with a membrane of an acid-resistant polybenzidimazole; taking away a permeate stream rich in water; and taking away a concentrate steam rich in the acid material. The acidic aqueous solution may be acetic acid.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: March 15, 2016
    Assignee: PBI Performance Products, Inc.
    Inventors: Yan Wang, Michael Gruender, Tai-shung Chung
  • Publication number: 20140171613
    Abstract: A process for preparing polyetherimides at higher production rates and a liquid reaction mixture are disclosed.
    Type: Application
    Filed: December 18, 2012
    Publication date: June 19, 2014
    Applicant: SABIC INNOVATIVE PLASTICS IP B.V.
    Inventors: Bryan Stegall, Robert Werling
  • Publication number: 20140094535
    Abstract: A method for the manufacture of a polyetherimide composition includes catalyzing the reaction of a dianhydride and an organic diamine with a catalyst selected from guanadinium salts, pyridinium salts, imidazolium salts, tetra(C6-24)aryl ammonium salts, tetra(C7-24 arylalkylene)ammonium salts, dialkyl heterocycloaliphatic ammonium salts, bis-alkyl quaternary ammonium salts, (C7-24arylalkylene)(C1-16alkyl)phosphonium salts, (C6-24aryl)(C1-16alkyl)phosphonium salts, phosphazenium salts and combinations thereof, optionally in the presence of a solvent.
    Type: Application
    Filed: October 3, 2012
    Publication date: April 3, 2014
    Inventors: Thomas Link Guggenheim, Roy Ray Odle, Farid Fouad Khouri
  • Publication number: 20140094536
    Abstract: A method for the manufacture of a polyetherimide composition includes catalyzing the reaction of a dianhydride and an organic diamine with a catalyst selected from guanadinium salts, pyridinium salts, imidazolium salts, tetra(C6-24)aryl ammonium salts, tetra(C7-24 arylalkylene) ammonium salts, dialkyl heterocycloaliphatic ammonium salts, bis-alkyl quaternary ammonium salts, (C7-24arylalkylene)(C1-16alkyl) phosphonium salts, (C6-24aryl)(C1-16alkyl)phosphonium salts, phosphazenium salts and combinations thereof, optionally in the presence of a solvent.
    Type: Application
    Filed: October 11, 2012
    Publication date: April 3, 2014
    Inventors: Thomas Link Guggenheim, Roy Ray Odle, Farid Fouad Khouri
  • Publication number: 20090099267
    Abstract: Polymers having a main chain having both aromatic units and aliphatic units (with repeating heteroatoms) and a side chain macromonomer are described. Methods of making these polymers using enzymatic synthesis and the applications of these polymers are also described.
    Type: Application
    Filed: May 26, 2006
    Publication date: April 16, 2009
    Applicant: University of Massachusetts
    Inventors: Rajesh Kumar, Jayant Kumar, Virinder Singh Parmar, Arthur C. Watterson
  • Publication number: 20080287640
    Abstract: A method of preparing polycarbonate includes a steps of providing a melt reaction mixture and allowing the melt reaction mixture to react to build molecular weight, thereby preparing the polycarbonate. The melt reaction mixture has a dihydroxy compound, an ester substituted diaryl carbonate mixture, and a melt transesterification catalyst where the ester substituted diaryl carbonate mixture may contain acid-substituted phenol. The method also includes the step of adjusting the molar ratio of acid-substituted phenol, if present, to melt transesterification catalyst (acid-substituted phenol/catalyst) in the melt reaction mixture to an amount of less than 10.
    Type: Application
    Filed: May 15, 2007
    Publication date: November 20, 2008
    Applicant: General Electric Company
    Inventors: Hatem Belfadhel, Hans-Peter Brack, Ignacio Vic Fernandez, Jorge Garcia Agudo, Joris de Grooth, Gerardo Hidalgo Llinas, Patrick Joseph McCloskey, Louis Obando, Martin Herke Oyevaar, Laurus van der Wekke, Dennis Willemse
  • Patent number: 7344657
    Abstract: An aromatic liquid-crystalline polyester composition is provided, which comprises at least one compound selected from an aliphatic carboxylate aryl ester and an aromatic carboxylic anhydride; an aromatic liquid-crystalline polyester; and a solvent containing at least 30% by weight of a halogen-substituted phenol compound. Using the composition, an aromatic liquid-crystalline polyester film with a low viscosity in melting state can be obtained.
    Type: Grant
    Filed: September 23, 2005
    Date of Patent: March 18, 2008
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Satoshi Okamoto, Shiro Katagiri
  • Patent number: 7307137
    Abstract: The present invention is directed to low dielectric polymers and to methods of producing these low dielectric constant polymers, dielectric materials and layers, and electronic components. In one aspect of the present invention, an isomeric mixture of thermosetting monomers, wherein the monomers have a core structure and a plurality of arms, is provided, and the isomeric mixture of thermosetting monomers is polymerized, wherein polymerization comprises a reaction of an ethynyl group that is located in at least one arm of a monomer.
    Type: Grant
    Filed: October 18, 2001
    Date of Patent: December 11, 2007
    Assignee: Honeywell International Inc.
    Inventors: Kreisler Lau, Feng Quan Liu, Paul Apen, Boris Korolev, Emma Brouk, Ruslan Zherebin, David Nalewajek, Roger Leung
  • Patent number: 7087704
    Abstract: It is an object of the present invention to manufacture high quality thermotropic liquid-crystalline polymer generating no low boiling gas and inducing no discoloration resulted from thermal degradation at high yield. To manufacture a liquid-crystalline polymer having 50 mol % or larger ratio of constitutive unit introduced from 4-hydroxybenzoic acid, the reaction is conducted under the presence of an acylating agent and of a catalyst quantity of aromatic sulfonic acid.
    Type: Grant
    Filed: March 7, 2005
    Date of Patent: August 8, 2006
    Assignee: Polyplastics Co., Ltd.
    Inventors: Keiichi Kanaka, Shinya Yamada
  • Patent number: 7063892
    Abstract: An aromatic liquid-crystalline polyester having a small dielectric loss in a wide frequency region is provided. An aromatic liquid-crystalline polyester is provided that can manufacture a film having a small volume expansion by heating. An aromatic liquid-crystalline polyester substantially comprising a repeating structural unit originating in 2-hydroxy-6-naphthoic acid 30 to 80 mol %, a repeating structural unit originating in aromatic diol 35 to 10 mol %, and a repeating structural unit originating in aromatic dicarboxylic acid 35 to 10 mol %.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: June 20, 2006
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Satoshi Okamoto, Tomoya Hosoda, Shinji Ohtomo
  • Patent number: 7049386
    Abstract: In a method of producing a low dielectric constant polymer, a thermosetting monomer is provided, wherein the thermosetting monomer has a cage compound or aryl core structure, and a plurality of arms that are covalently bound to the cage compound or core structure. In a subsequent step, the thermosetting monomer is incorporated into a polymer to form the low dielectric constant polymer, wherein the incorporation into the polymer comprises a chemical reaction of a triple bond that is located in at least one of the arms. Contemplated cage compounds and core structures include adamantane, diamantane, silicon, a phenyl group and a sexiphenylene group, while preferred arms include an arlyene, a branched arylene, and an arylene ether. The thermosetting monomers may advantageously be employed to produce low-k dielectric material in electronic devices, and the dielectric constant of the polymer can be controlled by varying the overall length of the arms.
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: May 23, 2006
    Assignee: Honeywell International Inc.
    Inventors: Kreisler S. Lau, Feng Quan Liu, Boris A. Korolev, Emma Brouk, Ruslan Zherebin, David Nalewajek
  • Patent number: 6984712
    Abstract: The present invention provides a liquid-crystalline polyester resin which comprises monomer units derived from 2-hydroxy-3-naphthoic acid and/or 2-hydroxynaphthalene-3,6-dicarboxylic acid in an amount of 1-5000 mmol % based on the total monomer components of the resin and an alkaline metal compound in an amount of 10-3000 ppm as alkaline metal based on the total monomer components of the resin. The liquid-crystalline polyester resin of the present invention has good colorability, improved heat resistance and good mechanical properties.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: January 10, 2006
    Assignee: Kabushiki Kaisha Ueno Seiyaku Oyo Kenkyujo
    Inventors: Ryuzo Ueno, Masaya Kitayama, Kiichi Kometani, Hiroyuki Kato, Kazunori Ueda
  • Patent number: 6803441
    Abstract: In a method of producing a low dielectric constant polymer, a thermosetting monomer is provided, wherein the thermosetting monomer has a cage compound or aryl core structure, and a plurality of arms that are covalently bound to the cage compound or core structure. In a subsequent step, the thermosetting monomer is incorporated into a polymer to form the low dielectric constant polymer, wherein the incorporation into the polymer comprises a chemical reaction of a triple bond that is located in at least one of the arms. Contemplated cage compounds and core structures include adamantane, diamantane, silicon, a phenyl group and a sexiphenylene group, while preferred arms include an arylene, a branched arylene, and an arylene ether. The thermosetting monomers may advantageously be employed to produce low-k dielectric material in electronic devices, and the dielectric constant of the polymer can be controlled by varying the overall length of the arms.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: October 12, 2004
    Assignee: Honeywell International Inc.
    Inventors: Kreisler Lau, Feng Quan Liu, Boris Korolev, Emma Brouk, Ruslan Zherebin, David Nalewajek
  • Patent number: 6624258
    Abstract: An agent for imparting flame retardancy to a thermoplastic resin contains a polyhydric phenol such as a tannin compound as an effective component. The thermal stability of the thermoplastic resin can be improved so as to elevate the decomposition temperature of the thermoplastic resin if a small amount of the flame retardancy imparting agent is added to the thermoplastic resin so as to suppress the combustibility of the thermoplastic resin.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: September 23, 2003
    Assignee: Tohoku Munekata Co., Ltd.
    Inventor: Susumu Nikkeshi
  • Patent number: 6524566
    Abstract: Phenolic polymers are prepared by oxidizing and polymerizing starting organic compounds comprising at least one hydroxyl group and at least one carbonyl group or at least two hydroxyl groups on an aromatic structure. One or more inorganic compounds or salts is added and the solution is allowed to stand at about 20° C. to 80° C. for a period of about at least 2 hours. Salt molecules as well as starting compounds and other low molecular-weight materials below about 500 to about 10,000 daltons are removed from the product solution. Purified phenolic polymers are prepared in concentrated aqueous solution or in dried powder form in a final step if necessary. The resultant phenolic polymers exhibit physicochemical properties strongly resembling those of typical commercially-available natural-product soil extracts. The materials are active herpes anti-viral agents, and are effective in anti-viral compositions for treating or preventing human herpes viral diseases.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: February 25, 2003
    Assignee: Laub Biochemicals Corp.
    Inventor: Richard J. Laub
  • Patent number: 6469123
    Abstract: In a method of producing a low dielectric constant polymer, a thermosetting monomer is provided, wherein the thermosetting monomer has a cage compound or aryl core structure, and a plurality of arms that are covalently bound to the cage compound or core structure. In a subsequent step, the thermosetting monomer is incorporated into a polymer to form the low dielectric constant polymer, wherein the incorporation into the polymer comprises a chemical reaction of a triple bond that is located in at least one of the arms. Contemplated cage compounds and core structures include adamantane, diamantane, silicon, a phenyl group and a sexiphenylene group, while preferred arms include an arylene, a branched arylene, and an arylene ether. The thermosetting monomers may advantageously be employed to produce low-k dielectric material in electronic devices, and the dielectric constant of the polymer can be controlled by varying the overall length of the arms.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: October 22, 2002
    Assignee: Honeywell International Inc.
    Inventors: Kreisler S. Lau, Feng Quan Liu, Boris A. Korolev, Emma Brouk, Ruslan Zherebin, David Nalewajek
  • Publication number: 20020051761
    Abstract: Phenolic polymers are prepared by oxidizing and polymerizing starting organic compounds comprising at least one hydroxyl group and at least one carbonyl group or at least two hydroxyl groups on an aromatic structure. One or more inorganic compounds or salts is added and the solution is allowed to stand at about 20° C. to 80° C. for a period of about at least 2 hours. Salt molecules as well as starting compounds and other low molecular-weight materials below about 500 to about 10,000 daltons are removed from the product solution. Purified phenolic polymers are prepared in concentrated aqueous solution or in dried powder form in a final step if necessary. The resultant phenolic polymers exhibit physicochemical properties strongly resembling those of typical commercially-available natural-product soil extracts. The materials are active herpes anti-viral agents, and are effective in anti-viral compositions for treating or preventing human herpes viral diseases.
    Type: Application
    Filed: October 9, 2001
    Publication date: May 2, 2002
    Inventor: Richard J. Laub
  • Publication number: 20020049299
    Abstract: Phenolic polymers are prepared by oxidizing and polymerizing starting organic compounds comprising at least one hydroxyl group and at least one carbonyl group or at least two hydroxyl groups on an aromatic structure. One or more inorganic compounds or salts is added and the solution is allowed to stand at about 20° C. to 80° C. for a period of about at least 2 hours. Salt molecules as well as starting compounds and other low molecular-weight materials below about 500 to about 10,000 daltons are removed from the product solution. Purified phenolic polymers are prepared in concentrated aqueous solution or in dried powder form in a final step if necessary. The resultant phenolic polymers exhibit physicochemical properties strongly resembling those of typical commercially-available natural-product soil extracts. The materials are active hemorrhagic fever anti-viral agents, and are effective in anti-viral compositions for treating or preventing hemorrhagic fever viral diseases.
    Type: Application
    Filed: October 11, 2001
    Publication date: April 25, 2002
    Inventor: Richard J. Laub
  • Publication number: 20020048561
    Abstract: Phenolic polymers are prepared by oxidizing and polymerizing starting organic compounds comprising at least one hydroxyl group and at least one carbonyl group or at least two hydroxyl groups on an aromatic structure. One or more inorganic compounds or salts is added and the solution is allowed to stand at about 20° C. to 80° C. for a period of about at least 2 hours. Salt molecules as well as starting compounds and other low molecular-weight materials below about 500 to about 10,000 daltons are removed from the product solution. Purified phenolic polymers are prepared in concentrated aqueous solution or in dried powder form in a final step if necessary. The resultant phenolic polymers exhibit physicochemical properties strongly resembling those of typical commercially-available natural-product soil extracts. The materials are active human immunodeficiency anti-viral agents, and are effective in anti-viral compositions for treating or preventing human immunodeficiency viral diseases.
    Type: Application
    Filed: October 11, 2001
    Publication date: April 25, 2002
    Inventor: Richard J. Laub
  • Patent number: 5919890
    Abstract: A method for producing polybenzazole, which comprises reacting a PBZ monomer salt with an AA-PBZ monomer or a BB-PBZ monomer in a non-oxidizing solvent having a dehydrating action to give an oligomer, and adding the AA-PBZ monomer or BB-PBZ monomer, which has not been subjected to the above reaction, to allow reaction with the oligomer, whereby to give a polymer having a desired polymerization degree. According to this method, the polymerization degree of the polymer to be obtained finally and of the polymer during production process can be easily controlled.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: July 6, 1999
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Kiyoshi Hotta, Fuyuhiko Kubota, Yoshio Araki, Masakatsu Ohguchi
  • Patent number: 5807969
    Abstract: In a process for the preparation of poly-o-hydroxyamides and poly-o-mercaptoamides, a bis-o-aminophenol or a bis-o-aminothiophenol is reacted with a dicarboxylic acid derivative with the following structure:M--CO--R*--CO--Mwhere M stands for the residue of an (optionally substituted) 2-hydroxybenzoxazole, 2-hydroxybenzothiazole, or 1-hydroxybenzotriazole or of corresponding mercapto compounds and R* is the parent body of the dicarboxylic acid.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: September 15, 1998
    Assignee: Siemens Aktiengesellschaft
    Inventors: Recai Sezi, Hellmut Ahne, Eberhard Kuehn, Roland Gestigkeit
  • Patent number: 5807972
    Abstract: The invention is directed to a hydrolytically polymerized polycaprolactam with new chain regulation, whereby the polymerization of caprolactam (I) is carried out with 0.1-0.7 weight percent of an aromatic dicarboxylic acid (II), 0.01-0.7 weight percent of an aliphatic or cycloaliphatic diamine (III) that carries a primary and a tertiary amino group, and/or 0.01-0.7 weight percent 4-amino-2,2,6,6-tetraalkyl piperidine (IV), whereby the quantities of constituents I through IV add up to 100 weight percent and the quantity of the constituents III and/or IV amounts to 0.01-0.7 weight percent.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: September 15, 1998
    Inventors: Hanns-Jorg Liedloff, Ernst Morf, Gerhard Schmidt
  • Patent number: 5783654
    Abstract: In a process for the preparation of poly-o-hydroxyamides and poly-o-mercaptoamides, a bis-o-aminophenol or a bis-o-aminothiophenol is reacted with a dicarboxylic acid ester with the following structure:G--O--CO--R*--CO--O--G,where G is an (optionally substituted) succinimide or maleinimide group and R* is the parent body of the dicarboxylic acid.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: July 21, 1998
    Assignee: Siemens Aktiengesellschaft
    Inventors: Recai Sezi, Hellmut Ahne
  • 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: 5726275
    Abstract: Process for the batchwise preparation of poly-p-phenylene terephthalamide polymer by means of reacting approximately equimolar amounts of p-phenylene diamine and terephthaloyl dichloride in a solution containing N-methyl-2-pyrrolidone and calcium chloride, with the reaction being carried out in a cylindrical reaction vessel equipped with a single mixing gear used as stirrer and granulator, the contents of the reaction vessel being whirlingly mixed as terephthaloyl dichloride is added, the formed polymer being crumbled, and the reaction and the crumbling taking place in one and the same reaction vessel. The whirling miming ensures that the terephthaloyl dichloride is very thoroughly mixed into the solution of N-methyl-2-pyrrolidone, calcium chloride, and p-phenylene diamine before the reaction between the reactants causes a very rapid increase in viscosity. The quality of She product obtained by this process is very high.
    Type: Grant
    Filed: July 31, 1996
    Date of Patent: March 10, 1998
    Assignee: Akzo Nobel N.V.
    Inventors: Angelica Elizabeth-Maria Bannenberg-Wiggers, Johannes A. van Omme, Joannes Marinus Surquin
  • Patent number: 5618890
    Abstract: The invention relates to polycarbonates (PC) terminated by allylphenols, preferably eugenol, and subsequently grafted with maleic anhydride (MA) in the melt, to their use as blending partners for polyamides (PA) and to the polycarbonate/polyamide blends.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: April 8, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Burkhard K ohler, Klaus Horn
  • Patent number: 5565544
    Abstract: A process for preparing a polyhydroxystyrene having a novolak type structure which comprises the step of polymerizing a mixture of carboxylic acid and at least one substituted phenyl carbinol whose formula is: ##STR1## wherein (a) R.sub.1 is selected from the group consisting of H, alkyl C.sub.1 -C.sub.20, substituted and unsubstituted phenyl, and C(O)R.sub.8 (where R.sub.8 is alkyl C.sub.1 -C.sub.20); (b) R.sub.2 is selected from the group consisting of H and alkyl C.sub.1 -C.sub.20 ; and (c) R.sub.3 -R.sub.7 are each independently selected from the group consisting of H, alkyl C.sub.1 -C.sub.20, OR.sub.9 (where R.sub.9 is H, alkyl C.sub.1 -C.sub.20, esters thereof, or substituted and unsubstituted phenyl), halogen, BZT, nitro, or amino, with the proviso that at least one of R.sub.3 -R.sub.7 is OR.sub.9, in the presence of a suitable catalyst for a sufficient period of time and under suitable conditions of temperature and pressure to form said novolak type polymer.
    Type: Grant
    Filed: June 16, 1995
    Date of Patent: October 15, 1996
    Assignee: Hoechst Celanese Corporation
    Inventor: James R. Sounik
  • Patent number: 5532487
    Abstract: This invention relates to a method for the measurement and control of polyamides and polyamide precursor mixtures by means of near-infrared spectroscopy.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: July 2, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Ann M. Brearley, Harvey S. Gold
  • Patent number: 5498477
    Abstract: Electroactive polymers are provided which contain alternating phenyl rings and nitrogen atoms, and which contain both quinoid mer units and benzenoid mer units. The polymers are formed by poly(condensation) of N-phenylhydroxylamine or derivatives thereof under anhydrous conditions in the presence of a Lewis acid catalyst. Methods for producing films, fibers and shaped articles of the polymers are provided as well.
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: March 12, 1996
    Assignee: Neste Oy
    Inventor: Floyd Klavetter
  • Patent number: 5466775
    Abstract: A process for preparing a substantially chloride-ion-free, high-molecular-weight, colorless and transparent polycarbonate by melt-polycondensing a dihydric phenol with a carbonic diester, which comprises using a carbonic diester which is substantially free from (A) phenyl salicylate, o-phenoxybenzoic acid and phenyl o-phenoxybenzoate, (B) tin ion, (C) methyl phenyl carbonate or (D) phenyl salicylate and o-phenoxybenzoic acid.A process for preparing a thermally stable polycarbonate by melt-polycondensing a dihydric phenol with a carbonic diester, which comprises using a borate or, a compound selected from the group consisting of electron-donative amines and salts thereof as a catalyst, and optionally an acidic substance.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: November 14, 1995
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Tatsuya Kanno, Yutaka Fukuda
  • Patent number: 5464926
    Abstract: Oligomeric monomers are produced by reaction of a bisphenol compound with ther a dihalobenzophenone or a (2,2)bis(4-halophenyl)hexafluoropropane and any other activated halogen containing aromatic compounds in the presence of a base and an appropriate solvent. The resulting oligomeric product, a dialkaline bisphenate terminated salt, is then reacted with 4-nitrophthalonitrile to form an oligomer-based phthalonitrile. These oligomers, in the presence or absence of an curing agent, may then be heated to form high temperature thermosetting polymers. These polymers can potentially be used as advanced materials for composites, as adhesives, and for microelectronic applications.
    Type: Grant
    Filed: July 27, 1994
    Date of Patent: November 7, 1995
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Teddy M. Keller
  • 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: 5374706
    Abstract: Novel compositions comprising a high concentration of one or more extended chain homopolymer, copolymer, or block polymer and certain polyphosphoric acids are prepared. Such compositions are optically anisotropic (liquid crystalline), capable of exhibiting excellent cohesive strength, and are especially suited to the production of high molecular weight ordered polymer fibers by dry-jet wet spinning. These liquid crystalline compositions are capable of being drawn through long air gap distances and spun at exceptionally high spin draw ratios. Fibers, films and other articles formed from these liquid crystalline compositions exhibit exceptionally high physical and heat resistant properties.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: December 20, 1994
    Assignee: The Dow Chemical Company
    Inventors: James F. Wolfe, Paul D. Sybert, Joanne R. Sybert
  • Patent number: 5352760
    Abstract: Oligomeric monomers are produced by reaction of a bisphenol compound with ther a dihalobenzophenone or a (2, 2) bis (4-halophenyl) hexafluoropropane and any other activated halogen containing aromatic compounds in the presence of a base and an appropriate solvent. The resulting oligomeric product, a dialkaline bisphenate terminated salt, is then reacted with 4-nitrophthalonitrile to form an oligomer-based phthalonitrile. These oligomers, in the presence or absence of an curing agent, may then be heated to form high temperature thermosetting polymers. These polymers can potentially be used as advanced materials for composites, as adhesives, and for microelectronic applications.
    Type: Grant
    Filed: February 18, 1993
    Date of Patent: October 4, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Teddy M. Keller
  • Patent number: 5340905
    Abstract: A two step solvent-free process for the preparation of polycarbonates having a low degree of branching is disclosed. Accordingly, the process comprise(i) transesterifying in the melt, at temperatures of from 80.degree. to 250.degree. C. and under atmospheric pressure and for a time of up to five hours of diphenols and carbonic acid diaryl esters in the presence of a catalyst to form an oligocarbonate having a weight average molecular weight of from 8,000 to 18,000 and an OH-end group content of from 25 to 50%, and(ii) polycondensing of said oligocarbonate at temperatures of from 250.degree. C. to 295.degree. C. and pressures of from <500 mbar to 0. 01 mbar,said catalyst being present in an amount of 10.sup.-1 to 10.sup.-8 tool of a catalyst per tool of diphenol, said catalyst being at least one member selected from the group consisting of quaternary ammonium compounds and quaternary phosphonium compounds.
    Type: Grant
    Filed: February 3, 1994
    Date of Patent: August 23, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Steffen Kuhling, Hermann Kauth, Wolfgang Alewelt, Dieter Freitag
  • Patent number: 5340734
    Abstract: A process for the in vitro production of chemically modified polyphenolic polymer (PPP). First, stable, highly active extracellular tyrosinase is produced from genetically transformed microorganism such as Streptomyces antibioticus. The tyrosinase is then incubated with a reaction substrate such as l-tyrosine, hydrolyzed protein, or an oligopeptide in combination with l-tyrosine. The ratio of the oligopeptide/tyrosine combination as well as variation in the concentration of tyrosinase can be used to modify the color, the molecular size, and the spectral absorbance properties of the PPP produced. Alternatively, or additionally, oxidants such as hydrogen peroxide or hypochlorite can be used to modify the color of the PPP, regardless of the method used to produce the PPP, and the PPP can subsequently be fractionated using molecular weight cut-off ultrafiltration. Organic solvents can also be used in the method of making PPP to produce PPPs having variable but reproducible physical properties.
    Type: Grant
    Filed: November 25, 1992
    Date of Patent: August 23, 1994
    Assignee: Biosource Genetics Corporation
    Inventors: Guy R. della-Cioppa, Stephen J. Garger, Jr., Richard B. Holtz, Michael J. McCulloch, Genadie G. Sverlow
  • Patent number: 5338828
    Abstract: Novel cyclic imino ether compositions containing one or more mesogenic moieties, when polymerized, result in products having improved properties.
    Type: Grant
    Filed: September 10, 1993
    Date of Patent: August 16, 1994
    Assignee: The Dow Chemical Company
    Inventors: Robert E. Hefner, Jr., Jimmy D. Earls
  • Patent number: 5326849
    Abstract: A method for producing an aromatic poly(thio)ether ketone having repeating units of the following formula (II): ##STR1## wherein each of R.sup.1 to R.sup.12 is a hydrogen atom, a halogen atom, a hydrocarbon group or an alkoxy group, X is an oxygen atom or a sulfur atom, provided that part of X may be a direct bond, and n is an integer of from 0 to 2, which comprises reacting an aromatic (thio)ether carboxylic acid fluoride of the following formula (I): ##STR2## wherein R.sup.1 to R.sup.12, X and n are as defined above, under pressure in an aprotic organic solvent in the presence of boron trifluoride.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: July 5, 1994
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Yukio Takahashi, Norihiko Yoneda, Seiichi Nozawa
  • Patent number: 5321113
    Abstract: A copolymer of an aromatic anhydride and an aliphatic ester suitable for use in surgical devices and a process for making said copolymer.
    Type: Grant
    Filed: May 14, 1993
    Date of Patent: June 14, 1994
    Assignee: Ethicon, Inc.
    Inventors: Kevin L. Cooper, Angelo G. Scopelianos
  • Patent number: 5312897
    Abstract: Electroactive polymers are provided which contain alternating phenyl rings and nitrogen atoms, and which contain both quinoid mer units and benzenoid mer units. The polymers are formed by poly(condensation) of N-phenylhydroxylamine or derivatives thereof under anhydrous conditions in the presence of a Lewis acid catalyst. Methods for producing films, fibers and shaped articles of the polymers are provided as well.
    Type: Grant
    Filed: August 11, 1992
    Date of Patent: May 17, 1994
    Assignee: Neste Oy
    Inventor: Floyd Klavetter
  • Patent number: 5304413
    Abstract: Laminar structures of PVF and substantially amorphous resin such as PEKK, backfilled with injection molding resin, exhibit an excellent combination of physical and aesthetic properties.
    Type: Grant
    Filed: April 29, 1992
    Date of Patent: April 19, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Joy S. Bloom, Robert F. Davis
  • Patent number: 5290908
    Abstract: Aromatic polyimides with acetylenic end groups are cured by coupling together thermally or catalytically using cuprous salts as catalysts to increase molecular weight with little or no by-product formation. These polyimides can be shaped and formed prior to the coupling.The acetylenic end-capped aromatic polyimides are formed by the reaction of an aromatic dianhydride, an acetylenic organic monoamine compound which will provide the reactive end groups and optionally an aromatic diamine.
    Type: Grant
    Filed: January 24, 1975
    Date of Patent: March 1, 1994
    Assignee: The University of Notre Dame du Lac
    Inventor: Gaetano F. D'Alelio
  • Patent number: 5286840
    Abstract: A thermally stable polyimide which is blocked at the polymer terminal with a dicarboxylic acid anhydride represented by the formula (III): ##STR1## wherein Z is a divalent radical selected from the group consisting of a monoaromatic radical which is substantially unsubstituted or substituted with a radical having no reactivity with amine or dicarboxylic acid anhydride and has from 6 to 15 carbon atoms, a condensed polyaromatic radical or a noncondensed aromatic radical connected each other with a direct bond or a bridge member, and has a fundamental skeleton represented by recurring structural units of the formula (IV): ##STR2## and a process of preparing the polyimide.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: February 15, 1994
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Hideaki Oikawa, Nobuhito Koga, Akihiro Yamaguchi, Shoji Tamai
  • Patent number: 5283313
    Abstract: A readily processable polyimide being blocked at the terminal of a polymer molecule with a divalent radical derived from dicarboxylic acid anhydride represented by the formula (IV): ##STR1## wherein Z is a divalent radical selected from the group consisting of a monoaromatic radical which is substantially unsubstituted or substituted with a radical having no reactivity with amine or carboxylic acid anhydride and has from 5 to 15 carbons atoms, condensed polyaromatic radical or noncondensed aromatic radical connected each other with a direct bond or a bridge member, and having a fundamental skeleton represented by recurring structural units of the formula (III): wherein X and Y are --O-- or --CO-- and differ each other; preparation process of the polyimide; and resin composition containing the polyimide and fibrous reinforcement.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: February 1, 1994
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Wataru Yamashita, Shoji Tamai, Akihiro Yamaguchi
  • Patent number: 5276128
    Abstract: Salts that contain AA-PBZ monomer ions and BB-PBZ monomer ions can be precipitated from an aqueous solution by contacting soluble salts of the monomers in an aqueous solution. The monomer salt can be polymerized by ordinary techniques to form polybenzazole polymers without the need for devolatilization and with very accurate stoichiometric control.
    Type: Grant
    Filed: October 22, 1991
    Date of Patent: January 4, 1994
    Assignee: The Dow Chemical Company
    Inventors: Steven Rosenberg, Richard C. Krauss, Ming-Biann Liu, Luke R. Kleiss
  • Patent number: 5264537
    Abstract: Novel polyiminocarbonates having molecular weights exceeding 70,000 daltons. Novel solution polymerization and interfacial polymerization processes for the preparation of polyiminocarbonates in which cyanate compounds are reacted with diphenol compounds in the presence of a strong base catalyst.
    Type: Grant
    Filed: March 5, 1992
    Date of Patent: November 23, 1993
    Assignee: Rutgers, The State University
    Inventors: Joachim B. Kohn, Chun Li
  • Patent number: 5262516
    Abstract: A process for preparing a polyetherimide-polyimide copolymer by (a) reacting a bis (ether anhydride) with a stoichiometric excess of an organic diamine in an inert, non-polar solvent to form an amine-terminated oligomer-solvent mixture; (b) removing unreacted organic diamine from the oligomer-solvent mixture; and (c) reacting the oligomer with an aromatic dianhydride.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: November 16, 1993
    Assignee: General Electric Company
    Inventor: Brent A. Dellacoletta
  • Patent number: RE46720
    Abstract: A pervaporation membrane may be an acid-resistant polybenzidimazole (PBI) membrane. The acid-resistant PBI membrane may be a PBI membrane chemically modified by a process selected from the group consisting of sulfonation, phosphonation, cross-linking, N-substitution, and/or combinations thereof. The membrane may be thermally stabilized. A method for the dehydration of an acid material may include the steps of: contacting an acidic aqueous solution with a membrane of an acid-resistant polybenzidimazole; taking away a permeate stream rich in water; and taking away a concentrate steam rich in the acid material. The acidic aqueous solution may be acetic acid.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: February 20, 2018
    Assignee: PBI Performance Products, Inc.
    Inventors: Yan Wang, Michael Gruender, Tai-Shung Chung