Nitrogen Containing Patents (Class 528/492)
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Publication number: 20020103332Abstract: The invention relates to conjugated polycarbazole derivates comprising repeating or alternating units of the formula: 1Type: ApplicationFiled: October 31, 2001Publication date: August 1, 2002Inventors: Mario Leclerc, Jean-Francois Morin
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Patent number: 6426399Abstract: The present invention describes an improved method for the polymerization of &agr;,&agr;-dihalo-p-xylene's such as the &agr;,&agr;′-dihalo-2-methoxy-5-(2-ethylhexyloxy)-xylene's. The procedure for synthesis is based on the specific order of addition of reagents and the use of an anionic initiator that allows control of the molecular weight of the polymer. The molecular weight control allows processability of the polymer which is important for its utility in applications including in light-emitting-diodes, field effect transistors and photovoltaic devices.Type: GrantFiled: February 11, 2000Date of Patent: July 30, 2002Assignee: Board of Regents, The University of Texas SystemInventors: John P. Ferraris, Charles J. Neef
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Patent number: 6410679Abstract: The present invention deals with the composition, and application of polyoxyalkylene glycol dicarboxylates, and complexes thereof. The complexes are made by a series of reactions which include reaction of an anhydride with a polyoxyalkylene glycol, then formation of a complex of the poly carboxylate with quaternary compounds. The complexes are useful as softening, anti-tangle, and conditioning agents for use in personal care applications due to their outstanding mildness.Type: GrantFiled: July 7, 2000Date of Patent: June 25, 2002Assignee: Biosil Research InstituteInventors: Anthony J. O'Lenick, Jr., Charles W. Buffa
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Patent number: 6410682Abstract: A gas generating material (16) comprises a polymeric amine. The polymeric amine has a polymer backbone that includes units of wherein R is a nitrogen containing organic radical of a nitrogen containing organic fuel that includes a primary amino group.Type: GrantFiled: January 3, 2001Date of Patent: June 25, 2002Assignee: TRW Inc.Inventor: Harold R. Blomquist
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Patent number: 6403762Abstract: The present invention is an improvement upon the process for producing poly(trimethylene terephthalate) (PTT) wherein 1,3-propanediol (PDO), and optionally other diols, and an aromatic diacid or diester thereof, and optionally other diacids or diesters, are esterified or transesterified and the esterification or transesterification product is polycondensed to produce a prepolymer which is solid state polymerized to produce a polymer with a desired intrinsic viscosity (IV). The prior art process includes the SSP prereaction steps of crystallization, drying/annealing, and preheating. The improvement in the present invention comprises crystallizing and preheating the PTT polymer in one step, without a drying/annealing step in between. Thus, the prepolymer still has a substantial moisture content when it is first exposed to the SSP reaction temperature inside the crystallizer/preheater.Type: GrantFiled: June 26, 2001Date of Patent: June 11, 2002Assignee: Shell Oil CompanyInventor: Ben Duh
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Patent number: 6395869Abstract: A high molecular weight polyester-amide block copolymer is produced by reacting a mixture of lower molecular weight polyester and polyamide in the melt with a carbonyl bislactam, especially carbonyl biscaprolactam. The higher molecular weight block copolymer may be obtained in as short a time as 2 minutes, whereas, at least about 10 minutes is required in a conventional process, under comparable conditions, using a bislactam.Type: GrantFiled: January 31, 2001Date of Patent: May 28, 2002Assignee: DSM N.V.Inventors: Jacobus A. Loontjens, Bartholomeus J. M. Plum
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Patent number: 6392010Abstract: This invention is directed to a process for the solid phase synthesis of aldehyde, ketone, oxime, amine, hydroxamic acid and &agr;,&bgr;-unsaturated carboxylic acid and aldehyde compounds and to polymeric hydroxylamine resin compounds useful therefor.Type: GrantFiled: December 22, 1999Date of Patent: May 21, 2002Assignee: Aventis Pharmaceuticals Inc.Inventors: Joseph M. Salvino, George C. Morton, Helen J. Mason, Richard F. Labaudiniere
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Patent number: 6388025Abstract: A method for increasing the molecular weight of aliphatic polyester resins from dicarboxylic aliphatic acids having 2-22 carbon atoms, or from hydroxy-acids having 2-22 carbon atoms, in which the solid resin is brought into contact with a chain extender preferably chosen from the organic disocyaciates.Type: GrantFiled: September 13, 2000Date of Patent: May 14, 2002Assignee: Ministero Dell'Universita' e Della Ricerca Scientifica e TecnologicaInventors: Gabriele Perego, Catia Bastioli, Gian Domenico Cella, Andrea Gardano
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Patent number: 6380353Abstract: Organic compounds containing —CH2—CHR—O— and/or —CH2—CH(OH)— groupings (R=H, C1-C4-alkyl) produce, under the action of free radicals, small amounts of C1-C2-aldehydes, the content of which can be reduced to <1 ppm according to the novel process by adding compounds which can react with the aldehyde groups. The materials containing said groupings include many emulsifiers and protective colloids used in polymer chemistry, such as polyethylene glycols, polyvinyl alcohols or ethoxylation products of long-chain alcohols, phenols or amines. The process is of particular importance for the treatment of polymer dispersions which have been prepared by free-radical polymerization of monomers in the presence of such emulsifiers or protective colloids, and permits the preparation of aldehyde-free polymer dispersions and their use for sanitary and hygiene articles.Type: GrantFiled: September 29, 2000Date of Patent: April 30, 2002Assignee: BASF AktiengesellschaftInventors: Robert Rupaner, Martin Scholtissek, Karl-Heinz Schumacher, Maximilian Angel
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Publication number: 20020049258Abstract: The present invention provides a method of recovering a polyamine compound and/or a polyol compound useful for starting materials of polyurethane resin in an industrially advantageous manner by first dissolving the polyurethane resin such as polyurethane foams discharged in a large amount as industrial wastes in a solubilizing agent containing a polyamine compound, a low molecular glycol or an amino alcohol, hydrolyzing the resulting solution with liquid water at 200 to 320° C., then recovering the polyamino compound and/or polyol compound thus formed.Type: ApplicationFiled: October 1, 1999Publication date: April 25, 2002Inventors: KATSUHISA KODAMA, KOUICHI MURAYAMA, TAKASHI KUMAKI
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Patent number: 6365706Abstract: A method for the production of polyasparagine is provided wherein the polyasparagine is prepared by ammonolysis of polysuccinimide in liquid ammonia, acting both as a solvent and as a reactant, wherein the polysuccinimide can be any polysuccinimide, such as linear, branched or cross-linked, wherein the polyasparagine produced has high %N content and is neutral as opposed to anionic or cationic.Type: GrantFiled: June 21, 2000Date of Patent: April 2, 2002Assignee: Mississippi Chemical CorporationInventor: Zhongxin Ma
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Patent number: 6359110Abstract: The present invention relates to a quick set composition and a method for preparing the composition. The composition comprises an aqueous sol of a polymer having a backbone that contains pendant cationic groups and pendant acid groups. The sol is prepared by forming a solution of a polymer that contains pendant cationic groups and pendant acid groups in an aqueous-based solvent that contains water and a suitable organic solvent and removing a sufficient amount of the organic solvent from the solution to form a composition characterized by being reversibly dissolvable and reconstitutable by addition and removal of a suitable organic solvent. The composition of the present invention provides quick-set films that can be prepared in the absence additional surface active agents and with a substantial absence of organic solvents.Type: GrantFiled: June 19, 2000Date of Patent: March 19, 2002Assignee: The Dow Chemical CompanyInventors: Robert D. Mussell, Gene D. Rose, Donald L. Schmidt
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Patent number: 6344539Abstract: This invention discloses a process for crystallizing polyester granules having a bi-component structure consisting of a thin crystalline skin and an essentially amorphous interior. The crystalline skin prevents the granules from sticking together in hot post-crystallization processes such as solid state polymerization or melt extrusion. The amorphous interior of the polyester granules facilitates a melt extrusion process by allowing lower melt temperatures and extruded products of improved uniformity.Type: GrantFiled: March 28, 2000Date of Patent: February 5, 2002Inventor: Walter M Palmer
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Publication number: 20020013446Abstract: A process for producing a polyphenylene ether by oxidative polymerization of a phenol compound using a catalyst and an oxygen-containing gas, wherein said catalyst comprises a copper compound, a bromine compound, a diamine compound of formula (1) as recited in the specification, a tertiary monoamine compound and a secondary monoamine compound, and wherein said process comprises the steps of: preparing a catalyst component (P1) in a container which is under a substantially oxygen-free inert atmosphere by mixing the copper compound and the bromine compound to obtain a mixture and then mixing the mixture with the secondary monoamine compound in an amount of at least 2 times the molar amount of the copper atom; separately preparing a catalyst component (P2) by mixing the diamine compound of formula (1) and the tertiary monoamine compound together with a solvent in an oxidative polymerization vessel; adding a predetermined amount of the catalyst component (P1) to the polymerization vessel containing the catalyst cType: ApplicationFiled: June 19, 2001Publication date: January 31, 2002Inventors: Akira Mitsui, Yuji Takeda
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Publication number: 20020010314Abstract: A process for producing a polyphenylene ether by oxidative polymerization of a phenol compound using a catalyst and an oxygen-containing gas, wherein the catalyst comprises a copper compound, a bromine compound, a diamine compound represented by the following formula (1): 1Type: ApplicationFiled: June 19, 2001Publication date: January 24, 2002Inventors: Akira Mitsui, Yuji Takeda
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Publication number: 20020007041Abstract: Polyamides including functional groups and methods of preparing such polyamides. The polyamides are useful, for example, to prepare filaments.Type: ApplicationFiled: January 9, 2001Publication date: January 17, 2002Inventor: George E. Zahr
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Publication number: 20020007040Abstract: A process for increasing the relative viscosity (RV) of a reactant polyamide and to products produced by the process. The process includes contacting the reactant polyamide and a chain extender compound, forming the product, and quenching the product when its RV is near its maximum calculated RV value.Type: ApplicationFiled: January 10, 2001Publication date: January 17, 2002Inventor: George E Zahr
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Publication number: 20020002267Abstract: A process for making a polyamide substrate characterized by enhanced breaking strength and fade resistance is disclosed. The process features the steps of treating a polyamide substrate, preferably a nylon 6 substrate having a hindered amine light stabilizer chemically bound thereto, with an effective amount of an ultraviolet inhibitor, an antioxidant and optionally, a dye, in the presence of a swelling agent for the polyamide that is also a solvent for the ultraviolet inhibitor and the antioxidant to impart high breaking strength to the substrate. A life preserver or other type of buoyancy device may be made from the process. A polyamide fabric comprising a dye, an ultraviolet inhibitor and an antioxidant also is disclosed. When a polyamide fiber of the present invention is exposed to sunlight, the useful life of the fiber is greatly increased compared to untreated polyamide fiber.Type: ApplicationFiled: May 23, 2001Publication date: January 3, 2002Applicant: AlliedSignalInventor: Donald Ray Long
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Patent number: 6326460Abstract: Polyamide particles, or polymer particles comprising polyamides, are extracted with aqueous solutions of aminonitiles and optionally further polyamide-forming monomers, polyamide-forming oligomers or mixtures thereof.Type: GrantFiled: August 16, 2000Date of Patent: December 4, 2001Assignee: BASF AktiengesellschaftInventors: Ralf Mohrschladt, Volker Hildebrandt, Volker Warzelhan
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Publication number: 20010047075Abstract: The invention relates to a process for the production of polyamide-6 by polymerization of &egr;-caprolactam with full re-use of extracted caprolactam and oligomers. The extract is not subjected to a pretreatment for reduction of the cyclic dimer content. By carrying out the polymerization in two steps, the first at an elevated pressure, but lower than the vapor pressure of the reaction mixture supplied, and the second at approximately atmospheric or reduced pressure, the cyclic dimer content of the polymerizate leaving the second polymerization step is kept at a constant level. The process offers a high degree of flexibility in terms of production capacity and composition and proportion of recycled lactam in the lactam feed for the polymerization.Type: ApplicationFiled: March 23, 2001Publication date: November 29, 2001Inventors: Ernst E.G. Kloosterman, Albert A.A. Van Geenen, Cornelis C.L. Van Der Sluijs, Erik E.R. Peerlkamp, Theo T.K. Schulpen, Ronald R.J.H. Hoenen
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Patent number: 6323300Abstract: Disclosed is an aromatic copolymer comprising a plurality of aromatic copolymer chains, each comprising (A) recurring 2,6-diphenylphenol units and (B) phenolic comonomer units, each comonomer unit being independently selected from the group consisting of (i) an oxyphenylene monomer unit which is monosubstituted with a monovalent aromatic group or a halogen atom, (ii) an &agr;-oxynaphthylene monomer unit, (iii) a &bgr;-oxynaphthylene monomer unit, and (iv) an oxyphenylene monomer unit which is substituted with at least one aliphatic group, wherein the amounts of (A) and (B) are from 50 to 98% by weight and from 2 to 50% by weight, based on the weight of the aromatic copolymer, provided that, when (iv) is present as the comonomer unit, the amount of (iv) is 20% by weight or less, based on the weight of (B), and wherein the aromatic copolymer has a weight average molecular weight of from 1,000 to 3,000,000. A method for producing the aromatic copolymer is also disclosed.Type: GrantFiled: May 21, 1999Date of Patent: November 27, 2001Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Kohei Kita, Tsuneaki Tanabe, Mitsuo Konishi
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Publication number: 20010027246Abstract: A method of recovering a decomposition product from a polyurethane, the method comprising the steps of thermally decomposing a polyurethane into a liquid containing a polyol and a urea compound which is soluble in the polyol, and solids containing a urea compound which is insoluble in the liquid in the presence of a polyamine compound at a temperature of 120 to 250° C.; removing the solids; hydrolyzing the residue with water retained at a high temperature of 200 to 320° C. and a high pressure; and recovering the resulting polyamine and/or polyol.Type: ApplicationFiled: April 2, 2001Publication date: October 4, 2001Inventors: Koichi Murayama, Katsuhisa Kodama, Takashi Kumaki
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Patent number: 6294245Abstract: A method for depositing an electrically conducting film on an electrode and the film resulting from that method. An electrically conducting film according to the present invention is deposited by immersing the electrode in a solution of a precursor polymer in a predetermined solvent. The precursor polymer includes a plurality of electrochemical polymerizable monomers. Each monomer has first and second polymer-forming active sites that can be joined by electrochemical polymerization and third and fourth polymer-forming active sites that can be joined chemically in solution. The precursor polymer is constructed from the monomers joined by the third and fourth polymer-forming active sites. The precursor polymer is soluble in the solvent whereas a polymer formed by electrochemical polymerization of the first and second polymer-forming active sites is insoluble in the solvent.Type: GrantFiled: September 22, 1999Date of Patent: September 25, 2001Assignee: Agilent Technologies, Inc.Inventors: Daniel B. Roitman, Seiji Inaoka, Riogoberto C. Advincula
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Patent number: 6281328Abstract: The invention relates to processes for treating acidic crudes or fractions thereof to reduce or eliminate their acidity by addition of effective amounts of crosslinked polymeric amines having a pKa of greater than 9 such as polyvinyl amine and anionic exchange resins having amino groups. The process has utility for crude processing.Type: GrantFiled: August 22, 2000Date of Patent: August 28, 2001Assignee: ExxonMobil Research and Engineering CompanyInventors: Guido Sartori, David William Savage, Bruce Henry Ballinger, David Craig Dalrymple
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Patent number: 6277953Abstract: The present invention relates to stable aqueous polymer dispersions and a process for their preparation. The aqueous dispersions of the invention have less than about 2 weight percent organic solvent, at least about 30 weight percent solids, a mean particle size of not more than about 300 nm, and a viscosity of less than about 20.0 poise at about ambient temperature.Type: GrantFiled: September 25, 1998Date of Patent: August 21, 2001Assignee: McWhorter Technologies, Inc.Inventors: Joseph Leo Nothnagel, Michael Davis Coad, Kevin Jude O'Callaghan, Carlos Alfredo Kienzie Sterzer
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Patent number: 6271391Abstract: Hydrazide fixed to a resin represented by the following formula: P—Q—CO—NH—NH2 (I) where P represents a main chain of a resin polymer and Q represents a hydrocarbon side chain optionally having a substituent which may be bonded via a heteroatom, and a hydrazone derived therefrom and fixed to a resin P—Q—CO—NH—N═CH—R1 (II) are provided, and solid phase synthesis of pyrazolone is conducted using the same, thereby enabling synthesis of pyrazolones by the application of the Mannich type reaction based on the solid phase synthesis and efficient construction of libraries for various kinds of them.Type: GrantFiled: November 8, 2000Date of Patent: August 7, 2001Assignee: Japan Science and Technology CorporationInventors: Shu Kobayashi, Hidekazu Oyamada
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Patent number: 6268468Abstract: The end group content of polyamide in the solid state may be reduced by treating the polyamide with gas-phase acid, anhydride, or amine. Stain- or dye-resistant polyamide fibers can be made by reducing the number of amino end groups. Reduction in the number of carboxylic end groups reduces the rate of regeneration of starting monomers during extrusion.Type: GrantFiled: July 10, 2000Date of Patent: July 31, 2001Assignee: BASF CorporationInventors: Otto M. Ilg, Harry Y. Hu, Scott R. Brank
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Patent number: 6265479Abstract: Disclosed are a deproteinizing agent comprising a proteolytic enzyme and one or more cationic surfactants selected from the group consisting of an alkylamine salt, an alkylamine derivative and quaternized compounds thereof; and a method of preparing a cationic deproteinized natural rubber latex, which comprises adding said deproteinizing agent to a field latex or an ammonia-treated latex thereby subjecting the latex to a deproteinization treatment and purifying the rubber particles in the latex.Type: GrantFiled: September 8, 2000Date of Patent: July 24, 2001Assignees: Sumitomo Rubber Industries, Ltd., Kao Corp.Inventors: Naoya Ichikawa, Akihiko Hamada, Masaharu Hayashi
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Patent number: 6245853Abstract: A one-step, in-situ, process for producing a high solids content emulsion or dispersion of partially or totally crosslinked urea formaldehyde or melamine formaldehyde resin droplets or particles, by forming a reaction mixture of (i) aqueous formaldehyde (formalin), (ii) at least one water-soluble protective colloid, (iii) water and (iv) optionally a surfactant, and mixing the reaction mixture in a reaction vessel; optionally adjusting the initial pH of the reaction mixture according to a desired value as needed; adding (a) urea, substituted urea, or a mixture thereof, or (b) melamine, substituted melamine, or a mixture thereof, to the reaction mixture; and heating the reaction mixture to a temperature at which condensation takes place between the (a) urea, substituted urea, or the mixture thereof, or (b) melamine substituted melamine, or the mixture thereof, and the formaldehyde to form a urea formaldehyde or melamine formaldehyde resin, and holding the reaction mixture at that temperature or a higher temperaType: GrantFiled: May 16, 2000Date of Patent: June 12, 2001Assignee: Neste Resins CanadaInventors: Kwok Tang, Guomin Bian, Leena Matilainen, Sinikka Ingelin
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Patent number: 6239251Abstract: Methods of forming low molecular weight oligomers of aniline-based compounds are provided as well as methods of forming varied molecular weight oligomers and polymers that are aniline-based which are end-functionalized and capable of being reacted with other monomeric species to form a variety of copolymers. The oligomers, end-functionalized oligomers and copolymers exhibit corrosion-resistant properties and provide corrosion-resistant compounds for use on various substrates.Type: GrantFiled: April 17, 1998Date of Patent: May 29, 2001Assignee: Drexel UniversityInventors: Yen Wei, Chuncai Yang, Tianzhong Ding, Xinru Jia, Danliang Jin, Jui-Ming Yeh, Jianguo Wang
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Patent number: 6235871Abstract: The transition metal-catalyzed amination of aryl halides, in conjunction with an orthogonal protective group scheme, forms the basis of two routes to oligoaniline precursors. The oligoaniline precursors are soluble in a variety of common organic solvents, and are easily converted to the deprotected oligoanilines. The method allows the preparation of oligoanilines of even or odd chain lengths, and the incorporation of a variety of functional groups into the oligomers. Polyanilines of low polydispersity can also be prepared by this method.Type: GrantFiled: December 2, 1998Date of Patent: May 22, 2001Assignee: Massachusetts Institute of TechnologyInventors: Robert A. Singer, Joseph P. Sadighi, Stephen L. Buchwald, Thomas Mackewitz
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Patent number: 6231926Abstract: A process for producing poromeric synthetic leather comprises I. producing an essentially nonporous impregnate by impregnating a textile sheet material with an aqueous polyurethane dispersion and drying, and II. producing a poromeric synthetic leather from the impregnate by subjecting the impregnate to the action of an aqueous solution of a Brønsted base.Type: GrantFiled: June 4, 1999Date of Patent: May 15, 2001Assignee: BASF AktiengesellschaftInventors: Cesare Ronzani, Ralf Mossbach, Karl Häberle
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Patent number: 6228980Abstract: The invention relates to a process for preparing a high-molecular polyamide or polyester by melt-mixing polyamide or polyester having a lower molecular weight with a carbonyl bislactam having formula 1, in which n=an integer of between 3 and 15. With the process according to the invention a permanent increase in the molecular weight of a polyamide is obtained within 2 minutes, whereas this takes at least 10 minutes under comparable conditions using a bislactam according to the state of the art.Type: GrantFiled: October 20, 1999Date of Patent: May 8, 2001Assignee: DSM N.V.Inventors: Jacobus A. Loontjens, Bartholomeus J. M. Plum
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Patent number: 6225419Abstract: An grafted polymeric amine is provided, the grafted polymeric amine including: N-substituted 2,5-pyrrolediyl groups incorporated in the backbone wherein the N-substituted 2,5-pyrrolediyl group may be represented by the general formula wherein R independently represents a hydrogen or a hydrocarbyl group and B represents the substituent containing at least one primary amino group; and vinyl monomers grafted to a polyketone backbone. This grafted polymeric amine is useful as a component in a wood glue composition.Type: GrantFiled: February 19, 1999Date of Patent: May 1, 2001Assignee: Shell Oil CompanyInventor: Pui-Kwan Wong
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Patent number: 6225402Abstract: The present invention is directed to stable aqueous dispersions of an acrylic modified chlorinated polyolefin and a process for their preparation. The aqueous dispersions of acrylic modified chlorinated polyolefin are effective for use as coatings on treated and untreated polyolefinic substrates.Type: GrantFiled: March 15, 1999Date of Patent: May 1, 2001Assignee: McWhorter Technologies, Inc.Inventors: Kevin Jude O'Callaghan, Wayne Taylor Riddick, Michael Davis Coad, Martin Joseph Will, II
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Patent number: 6217996Abstract: An aromatic polyimide film composed of a biphenyltetracarboxylic acid unit and a phenylenediamine unit, and having a thickness of 5-150 &mgr;m and an elongation of 45-90% shows, in combination with an electroconductive film, improved mechanical characteristics, when it has the following tensile modulus and a tear resistance measured by Elmendorf tearing tester: a tensile modulus of 750-1,300 kg/mm2 and a tear resistance of 350-1,500 g/mm in the case that the thickness is 50 &mgr;m or less; a tensile modulus of 650-1,200 kg/mm2 and a tear resistance of 550-1,500 g/mm in the case that the thickness is 50-100 &mgr;m; and a tensile modulus of 550-1,100 kg/mm2 and a tear resistance of 550-1,500 g/mm in the case that the thickness is 100 &mgr;m or more.Type: GrantFiled: March 1, 1999Date of Patent: April 17, 2001Assignee: Ube Industries, Ltd.Inventors: Tomohiko Yamamoto, Takeshi Uekido, Toshiyuki Nishino, Hiroshi Inoue, Takuji Takahashi
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Patent number: 6211319Abstract: Perfluoroelastomer compositions of improved processability are provided which have reduced levels of ionized or ionizable polymer endgroups.Type: GrantFiled: September 11, 1998Date of Patent: April 3, 2001Assignee: E. I. du Pont de Nemours and CompanyInventor: Walter Werner Schmiegel
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Patent number: 6207791Abstract: Described is a liquid, partially alkoxymethylated melamine crosslinker composition having from about 2.6 to about 4.6 moles of combined formaldehyde per mole of melamine, from about 1.4 to about 4.4 moles of alkyl per mole of melamine, from about 1.3 to about 3.4 moles of NH per mole of melamine, a free formaldehyde level of less than about 0.5 weight percent based on 100 percent solids, and an N-methylol level of less than about 6.0 weight percent; processes for its preparation; a low formaldehyde emitting curable composition containing the crosslinker; as well as a method of coating a substrate and substrates so coated.Type: GrantFiled: August 9, 2000Date of Patent: March 27, 2001Assignee: Cytec Technologies Corp.Inventors: John H. Bright, Barry A. Lawless, Robert G. Lees, Lon-Tang Wilson Lin, Jeno G. Szita
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Patent number: 6201097Abstract: A novel treatment and recovery process is provided which produces commercially desirable high molecular weight poly(arylene sulfide)s from undesirable low molecular weight poly(arylene sulfide)s. The novel process reduces the quantity of low molecular weight poly(arylene sulfide)s which otherwise have little or no commercial value and can require disposal.Type: GrantFiled: December 31, 1998Date of Patent: March 13, 2001Assignee: Phillips Petroleum CompanyInventors: Jon F. Geibel, Fernando C Vidaurri, Jr., Glenn F. Kile
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Patent number: 6191176Abstract: Degradable polyesters useful in packaging, packing, agricultural, biomedical, and other applications are made by reacting amine-protected glutamic acid with diols or epoxy compounds. The polyesters include a thermoplastic main chain aliphatic polyester, a thermoset heterochain polyester and a thermoset heterochain aromatic polyester. Each of these polyesters can be hydrolyzed into monomers using a biological catalyst such as the enzyme lipase. The thermoplastic main chain aliphatic polyester and the thermoset heterochain polyester can be degraded to respiratory gases and biomass with a mixed culture of Rhizopus chinesis, Rhizopus delemar, Penecillium pinophilum, Aspergillus niger and Pseudomonas aeruginosa microorganisms. This mixed culture of microorganisms can also be used to degrade other polyesters containing hydrolyzable backbone polyesters.Type: GrantFiled: February 16, 2000Date of Patent: February 20, 2001Assignee: Board of Regents of University of NebraskaInventors: Raef M. Tadros, Delmar C. Timm
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Patent number: 6180756Abstract: This invention concerns a process for the addition of volatile materials to prepolymers prior to or during solid state polymerization processes and the subsequent conducting of said solid state polymerization process.Type: GrantFiled: February 16, 2000Date of Patent: January 30, 2001Assignee: E. I. du Pont de Nemours and CompanyInventor: Robert Ray Burch
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Patent number: 6177483Abstract: A composition and uses of said composition are described for a latex based setting system for remedial and other operations within a wit bore. The composition comprises a pH-reducing agent and/or a coagulant. By controlling the amount of agent, the setting time of the system can be controlled in a range of 0.5 h to 15 h.Type: GrantFiled: May 25, 1999Date of Patent: January 23, 2001Assignee: Schlumberger Technology CorporationInventors: Mostafa A Tehrani, Stephen N Davies, Geoffrey C Maitland
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Patent number: 6166174Abstract: Polyimide copolymers were obtained containing 1,3-bis(3-aminophenoxy)benzene (APB) and other diamines and dianhydrides and terminating with the appropriate amount of a non-reactive endcapper, such as phthalic anhydride. Homopolymers containing only other diamines and dianhydrides which are not processable under conditions described previously can be made processable by incorporating various amounts of APB, depending on the chemical structures of the diamines and dianhydrides used. Polyimides that are more rigid in nature require more APB to impart processability than polyimides that are less rigid in nature. The copolymers that result from using APB to enhance processability have a unique combination of properties including: excellent thin film properties, low pressure processing (200 psi and below), improved toughness, improved solvent resistance, improved adhesive properties, improved composite mechanical properties, long term melt stability (several hours at 390 C.), and lower melt viscosities.Type: GrantFiled: August 5, 1999Date of Patent: December 26, 2000Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventor: Brian J. Jensen
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Patent number: 6166118Abstract: A process for emulsifying a functionalized polyolefin is described. A functionalized polyolefin having a weight average molecular weight greater than 10,000, a fatty acid, a base in an amount sufficient to neutralize the functionalized polyolefin and the fatty acid, a surfactant and water are mixed in a pressure reactor vessel to form a pre-emulsion concentrate having a solids concentrate ranging from about 55 to 90% by weight. The pre-emulsion concentrate is then heated with agitation in the reaction vessel to an emulsification temperature, preferably at or above the melting point of the highest melting polymer in the formulation, for a time sufficient to form an emulsion concentrate. Water is then added to the emulsion concentrate within the pressure reactor vessel, diluting the solids content to about 5 to 50% by weight, and heated with agitation to the emulsification temperature for a time sufficient to form a functionalized polyolefin emulsion. Preferably, the resulting emulsion is rapidly cooled.Type: GrantFiled: June 12, 1998Date of Patent: December 26, 2000Assignee: Eastman Chemical CompanyInventors: Kenneth Wayne Hyche, Terry Lynn Cutshall, Wallace Neville Cox, Stephen Louis Poteat
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Patent number: 6160086Abstract: A continuous, preferably counter-current, extraction process that can be used to significantly reduce the concentrations of residual monomers, residual catalyst, undesired solvents, and other impurities in polymer compositions. The invention is particularly beneficial for extracting residual monomers and other impurities from viscous, sticky polymer solutions, such as solutions of PSAs and low cohesive strength polymer compositions that phase change during extraction (i.e., change from liquid to solid, or precipitate), in a continuous manner. The polymer composition can be extruded into an extraction solvent as fibers in a vertical extraction column, under conditions such that at least a portion of an impurity is extracted from the polymer into the extraction solvent.Type: GrantFiled: July 30, 1998Date of Patent: December 12, 2000Assignee: 3M Innovative Properties CompanyInventors: David R. Holm, Daniel T. Chen, Robert S. Davidson, Eugene E. Harkins
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Patent number: 6140458Abstract: The invention provides a process for producing high-molecular aliphatic polyesters capable of being substitutes for general-purpose resins that are required to have high toughness, in a simplified manner and at a high volume efficiency. Specifically, in the process, used as the starting material is an easily-available, low-molecular aliphatic polyester prepolymer to be prepared through polycondensation of inexpensive materials of an aliphatic hydroxycarboxylic acid such as lactic acid, glycolic acid or the like, an aliphatic polyalcohol such as butanediol or the like, and an aliphatic polycarboxylic acid such as succinic acid or the like, and the starting prepolymer is crystallized and thereafter polycondensed in a solid phase in the presence of a catalyst to give the intended, tough and high-molecular aliphatic polyester.Type: GrantFiled: April 27, 1999Date of Patent: October 31, 2000Assignee: Mitsui Chemicals, Inc.Inventors: Yuji Terado, Hiroshi Suizu, Masatoshi Takagi, Masanobu Ajioka, Shoji Hiraoka, Masayuki Sakai, Hiroyuki Suzuki, Ryo Shinagawa, Shinji Ogawa, Yasushi Kotaki
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Patent number: 6127493Abstract: A process is disclosed for the preparation of a polyester polymer or polyester copolymer under superatmospheric pressure conditions in a pipe or tubular reaction under turbannular flow conditions. Reaction material having a glycol equivalents to carboxylic acid equivalents mole ratio of from 1.0:1 to 1.2:1, together with a superatmospheric dense gaseous medium are fed co-currently to the reactor. Dicarboxylic acid and/or diol raw materials may be injected into any of the reaction zones in the process during operation to achieve the overall desired mole ratio balance. The process operates at temperatures of from about 220.degree. C. to about 320.degree. C., with turbannular flow achieved before the polymer product and gas exit the reactor process. The pressure in the reaction zones can be in the range from 15 psia to 2500 psia.Type: GrantFiled: November 4, 1998Date of Patent: October 3, 2000Assignee: Arteva North America S.A.R.L.Inventors: Charles J. Maurer, Gordon Shaw, Vicky S. Smith
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Patent number: 6121411Abstract: The invention relates to processes for treating acidic crudes or fractions thereof to reduce or eliminate their acidity by addition of effective amounts of crosslinked polymeric amines. The process has utility for crude processing.Type: GrantFiled: August 6, 1999Date of Patent: September 19, 2000Assignee: Exxon Research and Engineering CompanyInventors: Guido Sartori, David William Savage, Bruce Henry Ballinger, David Craig Dalrymple
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Patent number: 6114471Abstract: The strength of lignocellulosic materials is improved by treating them with water-soluble strengthening agents containing sulfonic units, and rendering these agents water-insoluble by reacting them with compounds containing azetidinium rings. Thus, a substantial reduction or elimination of the bleeding of said strengthening agents from the lignocellulosic materials when touched with wet hands or contacted under humid conditions is achieved.Type: GrantFiled: November 12, 1998Date of Patent: September 5, 2000Assignee: The Proctor & Gamble CompanyInventors: Blair Alex Owens, Dimitris Ioannis Collias, Andrew Julian Wnuk
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Patent number: 6107451Abstract: A curable composition consisting of at least 2 components (a) and (b), wherein(a) is a liquid oligomer or polymer having a molecular weight of 200-50,000 and containing dicarboxylic anhydride groups, and(b) is a compound of formula I ##STR1## wherein A is linear or branched C.sub.2 -C.sub.20 alkylene, C.sub.5 -C.sub.7 cycloalkylene, C.sub.7 -C.sub.10 bicycloalkylene, or C.sub.1 -C.sub.30 alkylene containing one or more than one C.sub.5 -C.sub.7 cycloalkylene group or C.sub.7 -C.sub.30 bicycloalkylene group in the main or side chain, which cycloalkylene and bicycloalkylene groups can be unsubstituted or substituted by one or several C.sub.1 -C.sub.6 alkyl groups, and R.sub.1 and R.sub.2 are independently of each other C.sub.1 -C.sub.18 alkyl, C.sub.4 -C.sub.10 cycloalkyl or C.sub.7 -C.sub.24 -aralkyl, which cycloalkyl and aralkyl groups can be unsubstituted or substituted by one or more than one C.sub.1 -C.sub.Type: GrantFiled: October 21, 1998Date of Patent: August 22, 2000Assignee: CIBA Specialty Chemicals Corp.Inventors: Walter Fischer, Alex Wegmann