Aryl-containing Reactant Patents (Class 528/331)
  • Patent number: 6025113
    Abstract: A polyimide precursor having repeating units of the formula: ##STR1## wherein R.sup.1 is a tetravalent organic group having 4 or more carbon atoms; R.sup.2 is a trivalent or tetravalent organic group having one or more aromatic rings; R.sup.3 is a monovalent organic group; A is a monovalent group showing acidity; and n is an integer of 1 or 2, is effective for preparing a highly sensitive negative-working photosensitive material developable with an alkaline aqueous solution in a short time with high resolution.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: February 15, 2000
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Haruhiko Kikkawa, Fumio Kataoka, Issei Takemoto, Jun Tanaka, Keiko Isoda, Shunichiro Uchimura, Makoto Kaji, Minoru Sugiura
  • Patent number: 6011131
    Abstract: Process for the preparation of polyamides comprising the steps of A) reacting a soybean oil condensate obtained from the deodorization of refined soybean oil and which contains less than 30% by weight of free and esterified oleic acid based on the total weight of free and esterified fatty acids in said condensate, with a C.sub.1-4 alkanol in the presence of a zinc oxide catalyst to convert free fatty acids and fatty acid glyceride esters to fatty acid C.sub.1-4 alkyl esters;B) removing excess C.sub.1-4 alkanol, volatile reaction by-products, water, and the zinc oxide catalyst from the resulting reaction mixture;C) heating the reaction mixture from step B) under vacuum to obtain a distillate of fatty acid C.sub.1-4 alkyl esters;D) separating the distillate from step C) into a fraction containing mostly C.sub.16-18 saturated fatty acid C.sub.1-4 alkyl esters and a second fraction containing mostly C.sub.16-18 unsaturated fatty acid C.sub.1-4 alkyl esters wherein the oleic acid C.sub.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: January 4, 2000
    Assignee: Henkel Corporation
    Inventors: Setsuo Sato, Hercules Peloggia, Tracy Hunt, Joerg Schwarzer, Ramiro Carielo Bueno, Roger A. Lovald
  • Patent number: 5965689
    Abstract: The invention relates to electrical and electronic components made of a polyamide composition and possessing an improved resistance under soldering conditions, particularly when the surface mounting technique is used. This is achieved by using a polyamide composition whose main chain essentially consists of units derived from aliphatic dicarboxylic acids and diamines or .alpha.,.omega.-amino acids, and in which 1-40% of the chain units are derived from 1,6-cyclohexanedicarboxylic acid and an aliphatic diamine, or from 1,4-cyclohexanediamine and an aliphatic dicarboxylic acid.As a result, the temperature at which blisters are formed during soldering by the infrared method is 20-30.degree. C. higher than in the case of the homo-polyamide.
    Type: Grant
    Filed: March 19, 1998
    Date of Patent: October 12, 1999
    Assignee: DSM N.V.
    Inventors: Cornelis E. Koning, Petronella M. Knape, Robert M. Leeuwendal, Josefina M. A. Schiffer
  • Patent number: 5965687
    Abstract: This invention is an improvement in standard polymerizations procedures, i.e., addition-type and step-growth type polymerizations, wherein momomers are reacted to form a growing polymer chain. The improvement includes employing an effective amount of a trifunctional monomer (such as a trifunctional amine, anhydride, or phenol) in the polymerization procedure to form a mixture of polymeric materials consisting of branced polymers, star-shaped polymers, and linear polymers. This mixture of polymeric materials has a lower melt temperature and a lower melt viscosity than corresponding linear polymeric materials of equivalent molecular weight.
    Type: Grant
    Filed: June 5, 1998
    Date of Patent: October 12, 1999
    Assignee: The United States of America represented by the Adminstrator of the National Aeronautics and Space Administration
    Inventor: Brian J. Jensen
  • Patent number: 5959069
    Abstract: Polyamides are built up from, as fundamental building blocks (a), lactams or aminocarboxylic acids or mixtures of these,as fundamental building blocks (b), from 1 to 50 .mu.mol of at least tribasic amines or carboxylic acids per gram of polyamide,as fundamental building blocks (c), dibasic carboxylic acids or amines andas fundamental building blocks (d), monobasic carboxylic acids or amines,where (c) and (d) are carboxylic acids if (b) are amines, and (c) and (d) are amines if (b) are carboxylic acids,the equivalents ratio of the functional groups of (b) to the functional groups of (c) and (d) together is from 60:40 to 40:60 andthe equivalents ratio of the functional groups of (c) to the functional groups of (d) is from 15:85 to 60:40.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: September 28, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Alexander Gluck, Walter Gotz, Stefan Grutke, Martin Laun, Volker Warzelhan
  • Patent number: 5932688
    Abstract: An improved polybenzimidazole wherein the total concentration of metals other than alkali metal and alkaline earth metals is 10 ppm or less. The resulting polybenzimidazole is industrially useable in parts or components of apparatus for the manufacture of semiconductors and display devices.
    Type: Grant
    Filed: January 14, 1997
    Date of Patent: August 3, 1999
    Assignee: Hoechst Japan Limited
    Inventor: Makoto Murata
  • Patent number: 5917003
    Abstract: A process for producing polymers of .alpha., .omega.-unsaturated conjugated compounds, which includes reacting a compound of the formula (I),B--A--C (I)whereinB denotes a sp.sup.3 -hybridized carbon atom carrying at least one hydrogen atom,A denotes a conjugated-.pi.-system or a --CH.dbd.CH--group, andC denotes a carbon atom carrying at least one leaving group,with a base in a solvent. On reaction of the base with the compound of the formula (I) a polymer is formed as a by-product essentially soluble in the solvent and a solid is formed as a by-product which is essentially insoluble in the solvent. According to the process, chemically and thermally stable, high molecular weight polymers of high purity and high regularity are obtained in good yield. If the products of the process carry groups that undergo elimination, forming double bonds, high quality electroluminescent materials can be prepared.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: June 29, 1999
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Joanes Gelan, Dirk Vanderzande, Frank Louwet
  • Patent number: 5917001
    Abstract: An uncoated lens, especially for use as the lens of a fog light or a headlight for an automobile, and having particularly good resistance against the environmental effects which are inherent in this environment, is formed of a colorless, transparent copolyamide having a glass transition temperature of at least a 170.degree. C., blended with a homopolyamide, and wherein the copolyamide is formed from at least one cycloaliphatic diamine with two cyclohexane rings, and at least one aromatic dicarboxylic acid which is predominantly isophthalic acid. The copolyamide may optionally contain up to 20 mol % of a further polyamide forming monomer of at least one lactam or an omega-aminocarboxylic acid. The homopolyamide is preferably one of PA6, PA11, PA12, PA66, PA69, PA610 or PA612. The cycloaliphatic diamine of the copolyamide is preferably bis(3-methyl-4-aminocyclohexyl)-methane.
    Type: Grant
    Filed: September 6, 1996
    Date of Patent: June 29, 1999
    Assignee: EMS-Inventa AG
    Inventors: Susanne Laederach, Hans Dalla Torre
  • Patent number: 5917004
    Abstract: The invention is relative to weather-resistant polyamides and to methods of their production in which the polymerization or polycondensation of the polyamide-forming monomers (I) is carried out in the presence of 0.02 to 0.7% by weight 4-amino-2,2,6,6-tetraalkylpiperdine (II), 0 to 0.5% by weight of an aliphatic or cycloaliphatic diamine (III) carrying a primary and a tertiary amino group and 0.02 to 0.7% by weight of a 2,6-dialkylphenol (IV) functionalized in 4-position to the OH group and with the formula ##STR1## in which R.sup.1 and R.sup.2 are the same or different alkyl groups with 1 to 6 C atoms, R.sup.3 is either a hydrogen atom or a methyl group, functional group A represents either a free carboxyl group or a carboxyl group esterified with C.sub.1 -C.sub.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: June 29, 1999
    Assignee: EMS-Inventa AG
    Inventor: Hanns-Jorg Liedloff
  • Patent number: 5902876
    Abstract: Improved process for producing a polybenzimidazole compound in solution by dissolving a fully dried polybenzimidazole of the following general formula (1) or (2) in N,N-dimethylacetamide of a sufficiently reduced water content at an elevated temperature of 260.degree. C. or higher in an inert gas atmosphere and a solution of the polybenzimidazole compound produced by the process. The solution remains useful for an extended time without using metal salts or any other stabilizers: ##STR1## where R.sup.1, R.sup.2 and R.sup.5 are tetra-, di- and trivalent aromatic groups, respectively; R.sup.3, R.sup.4 and R.sup.6 are each independently a hydrogen atom, an alkyl group or an aryl group; n is an integer of 2 or more.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: May 11, 1999
    Assignee: Hoechst Japan Limited
    Inventors: Makoto Murata, Toru Nakamura
  • Patent number: 5883220
    Abstract: The copolymer described is a segmented copolymer consisting essentially of organic segments A which have a number i of reactive ends such that i is from 1 to 6 inclusive, and segments B which have a number j of reactive ends such that j is from 1 to 6 inclusive. The segments B have redox properties and each segment A is connected to at least one segment B by a group Y and vice versa, the group Y being an ether, thioether, secondary amine, tertiary amine, secondary amide, tertiary amide, imide, quarternary ammonium group, or a group having a carbon--carbon bond. The respective weighted molar mean of i and j is 2 or more. Application to electrochemical generators and electrochromic systems.
    Type: Grant
    Filed: August 21, 1997
    Date of Patent: March 16, 1999
    Assignees: Centre National de la Recherche Scientifique, Hydro-Quebec
    Inventors: Michel Armand, Daniel Baril, Yves Choquette, Christophe Michot, Jean-Yves Sanchez
  • Patent number: 5844069
    Abstract: The invention provides copolymers having magnetic properties, said copolymers containing aminoaromatic groups, and being based on a structural unit comprising:a first group of aminoaromatic compounds chosen from aniline derivatives and the corresponding iminoquinone forms; anda second group of substituted aminoaromatic compounds chosen from substituted amino compounds containing at least two condensed benzene rings, substituted polycyclic compounds containing at least one aniline structural unit in their structure, compounds derived from aniline and carrying a substituent bonded to the ring by means of an ethynylidene or paraphenylene link, and the corresponding iminoquinone compounds.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: December 1, 1998
    Assignee: Alcatel Alsthom Compagnie Generale D'Electricite
    Inventors: Stanislas Galaj, Alain Le Mehaute
  • Patent number: 5837802
    Abstract: The present invention relates to a fast setting water sensitive polyamide composition which is the reaction product of at least one reactant which is a dicarboxylic acid, ester or anhydride thereof and at least one reactant is a diamine wherein at least one of said diamines is polyoxyalkylene diamine and at least one of said other reactants is aromatic and said polyamide composition has a T.sub.g of greater than about 15.degree. C. and a .DELTA.H greater than 0 Joules/gram.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: November 17, 1998
    Assignee: H. B. Fuller Licensing & Financing, Inc.
    Inventors: Gregory J. Van Lith, Mark S. Kroll, Leslie J. Clapp
  • Patent number: 5837803
    Abstract: A method of producing a polyamide resin by reacting 1 mol of linear polyester resin (as calculated in repeating unit of the linear polyester resin) consisting of at least one dicarboxylic acid component and at least one diol component and having an intrinsic viscosity of not less than 0.2 dl/g with 0.5-1.5 mol of at least one diamine compound in a reaction medium comprising at least one solvent which is selected from the group consisting of hydrocarbons, halogenated hydrocarbons, ethers and acetals, so that the diol component of the linear polyester resin is substituted by the diamine compound to provide the polyamide resin as a reaction product.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: November 17, 1998
    Assignee: M & S Research and Development Co., Ltd.
    Inventor: Seiko Nakano
  • 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: 5817742
    Abstract: Polymer-based polyvalent malonic acid derivatives having anti-adhesive properties are described. The compounds comprise a polyamino acid linked to a group of formula (I). In formula (I), R.sup.1 and R.sup.2 together form a six-membered carbocylic or heterocyclic ring, containing at least one substituent selected from R.sup.4, R.sup.5, and R.sup.6. R.sup.3 is H, (CH.sub.2) .sub.m X or CH.sub.2 O(CH.sub.2).sup.m X.sup.1. The polyamino acid and the group of formula II are linked via R.sup.4, R.sup.5, or R.sup.6, or optionally via a spacer of formula --?Q.sup.1 --(CH.sub.2).sub.p --Q.sup.2 --!.sub.r. A and B independently are O, S, NH, HN--CO, OC--NH, O--CO, OC--O, NH--CO--O, --O--CO--NH, S--CO, SC--O, O--CS--S, S--CS--OS, NH--CS--S, S--CS--NH, or CH.sub.2. Z is a pyranose, furanose, open-chain polyalcohol or Y--X.sup.6. Y is --O--(CX.sup.2,X.sup.3).sub.n, -(CX.sup.2,X.sup.3).sub.n, --CH.sub.2 --(CX.sup.2,X.sup.3).sub.
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: October 6, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Alexander Toepfer, Gerhard Kretzschmar, Eckart Bartnik, Wolfgang Schmidt, Brigitte Horsch
  • Patent number: 5807929
    Abstract: At least bis-imido 1,3,5-triazines and processes of preparing the same are disclosed. Also disclosed are prepolymers having at least bis-imido functionality and curable compositions comprising at least bis-imido 1,3,5-triazines or prepolymers thereof in combination with active hydrogen and/or epoxy functional materials. The at least bis-imido 1,3,5-triazines and prepolymers may be advantageously employed as crosslinking agents which crosslink by a ring opening reaction that eliminates the release of volatile organic compounds.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: September 15, 1998
    Assignee: Cytec Technology Corp.
    Inventors: Lon-Tang Wilson Lin, Robert G. Lees, William F. Jacobs, III, Subban Ramesh
  • Patent number: 5789524
    Abstract: A process for producing a polyimide composition by reacting at least one polyamic acid or at least one polyamic ester or a mixture of at least one polyamic acid and at least one polyamic ester with a selected phosphoramide in the presence of at least one base catalyst to from a polyimide composition.
    Type: Grant
    Filed: April 15, 1997
    Date of Patent: August 4, 1998
    Assignee: Olin Microelectronic Chemicals, Inc.
    Inventors: Steve L. C. Hsu, Ahmad Naiini, William D. Weber, Andrew J. Blakeney
  • Patent number: 5789525
    Abstract: A process for making polyimide composition comprising reacting at least one diamine, at least one tetracarboxylic diacid diester, selected phosphoramide and at least one base catalyst to form at least one polyimide compound, said reaction carried out at a temperature from about 20.degree. C. to about 60.degree. C. and wherein the molar ratio of diamine:tetracarboxylic diacid diester:phosphoramide:base catalyst is in the range of 0.8-1.2:1:2.5-4.0:2.5-4.0.
    Type: Grant
    Filed: April 15, 1997
    Date of Patent: August 4, 1998
    Assignee: Olin Microelectronic Chemicals, Inc.
    Inventors: Ahmad Naiini, Steve L. C. Hsu, William D. Weber, Andrew J. Blakeney
  • Patent number: 5783655
    Abstract: A process for the preparation of aromatic polyamide pulp having both excellent physical properties and a high degree of polymerization by continuous polymerization and orientation by using of mixed solutions. The solutions are prepared by reacting diamine with aromatic diacid dichloride in an amide and/or urea-based polymerization solvent containing inorganic salts, or a mixture of inorganic salts and a Lewis acid compound. The process can be practiced by polymerization-orientation apparatus located on the continuous transferable polymerization-orientation means comprised of a belt and one or more stirring bars.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: July 21, 1998
    Assignee: Kolon Industries, Inc.
    Inventors: Du Hyun Kim, Seock Chul Ryu, Won Jun Choe, Young Hwan Park, Chang Seop Ji
  • Patent number: 5780578
    Abstract: The invention provides a polymer composed of vinyl monomers bearing imidazole, hydroxyl and carboxyl groups arranged in proximity to each other, that exhibits hydrolytic activity similar to serine proteases, and a process for its preparation. The polymer is useful for the hydrolysis of esters and amides to the corresponding alcohols and amines.
    Type: Grant
    Filed: March 14, 1996
    Date of Patent: July 14, 1998
    Assignee: Council Of Scientific & Industrial Research
    Inventors: Raghunath Anant Mashelkar, Mohan Gopalkishna Kulkarni, Rohini Nitin Karmalkar
  • 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: 5770142
    Abstract: Provided is a process for manufacturing sintered polybenzimidazole (PBI) articles at high yields, said articles having neither voids nor porous, low-strength parts resulting from oxidative deterioration. To produce said sintered PBI articles from a particulate PBI resin, said PBI resin is compacted in a closed mold, the mold is heated up to a predetermined temperature of from 350.degree. to 600.degree. C. without applying any external pressure thereto, then, after having heated up to said predetermined temperature, the mold is pressed to have a predetermined external pressure of from 140 to 1400 kg/cm2 at said predetermined temperature whereby the resin is sintered for from 60 to 350 minutes under that conditions, and finally the sintered PBI article is cooled and taken out of the mold.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: June 23, 1998
    Assignee: Hoechst Japan Limited
    Inventors: Yoshisato Sasaki, Minoru Kurisaki
  • Patent number: 5763539
    Abstract: A process for producing polymers of .alpha.,.omega.-unsaturated conjugated compounds, comprising reacting a precursor monomer of the formula I, ##STR1## wherein P denotes --SR.sup.3, --SO--R.sup.3, --SO.sub.2 --R.sup.3, --COOR.sup.3, --NO.sub.2, --CN, --CF.sub.3 or R.sup.3 ; L denotes --Cl, --Br, --I, --O-tosylate, --O-mesylate, --O-triflate, --(NR.sup.3.sub.3).sym. or --(SR.sup.3 R.sup.4).sym.; R.sup.1,R.sup.2 are the same or different and denote H, R.sup.3 or P; R.sup.3, R.sup.4 and A are as defined in the application. This reaction is characterized in that, on reaction of the base with the compound of the formula (I), a polymer is formed which is essentially soluble in said solvent, and a salt is formed as a by-product, which is essentially soluble in the solvent. That solvent comprises a compound selected from the group consisting of a) amides of the general formula (II) R.sup.5 --CO--NR.sup.6 H; b) amines of the general formula (III) R.sup.7.sub.2 --N--R.sup.8 ; c) sulfones of the general formula (IV) R.
    Type: Grant
    Filed: October 2, 1995
    Date of Patent: June 9, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Roland Stern, Dirk Vanderzande, Frank Louwet, Joanes Gelan, Anna Issaris, Michael van der Broght
  • Patent number: 5760167
    Abstract: A copolyamide composition prepared from hexamethylene diamine and mixtures of adipic acid, terephthalic acid and isophthalic acid, has a melting point below 300.degree. C., a glass transition temperature between 100.degree. C. and 130.degree. C. and physical properties similar to nylon 66.
    Type: Grant
    Filed: November 15, 1995
    Date of Patent: June 2, 1998
    Assignee: Industrial Technology Research Institute
    Inventors: Wu-Bin Yuo, Chien-Shiun Liao, Wen-Jeng Lin, Li-Kuei Lin, Tien-San Lee, Szu-Yuan Chan
  • Patent number: 5760147
    Abstract: A molding composition or mixture comprising a polyamide and at least one polymer containing sulfoxide groups serves for the production of a foam material by the action of heat. The foam material is used for moldings and heat-resistant insulation layers.
    Type: Grant
    Filed: April 18, 1996
    Date of Patent: June 2, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Axel Schonfeld, Georg Frank, Andreas Schleicher, Helmut Scheckenbach, Siegfried Weis
  • 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: 5739262
    Abstract: This invention relates to a novel ternary polyamide for the production of monofilaments, films and injection moulded articles.
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: April 14, 1998
    Assignee: Bayer AG
    Inventors: Heinrich Morhenn, Dieter Brokmeier, Werner Nielinger
  • Patent number: 5728799
    Abstract: The present invention is directed to an aromatic polyamide of formula (I), ##STR1## an optical anisotropic dope containing the aromatic polyamide and a process of making the optical anisotropic dope which does not require sulfuric acid. R is an unsubstituted aromatic group or an aromatic group having at least one nitrile group substituted on the aromatic nucleus, with the proviso that at least 25 mol % of R in the aromatic polyamide is an aromatic group having at least one nitrile group substituted on the aromatic nucleus; R' is phenyl, naphthyl or diphenyl, which is unsubstituted or substituted with Cl, Br, I, NO.sub.2, an alkyl group having one to four carbon atoms or an alkoxy group having one to four carbon atoms; and n is an integer between 10 and 100,000.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: March 17, 1998
    Assignee: Kolon Industries, Inc.
    Inventor: Tae-Jin Oh
  • Patent number: 5705602
    Abstract: A star-like or comb-like branched aliphatic polyamino compound for use as a basic catalyst or a curing agent, as an effective thixotropic agent or viscosity adjusting agent for an aqueous medium, as a component for any one of a coating-forming agent, a sealing agent, a molding material and an adhesive resin, or as a substantially solvent-free coating composition, molding material or adhesive resin. The process for the production of the above compound comprises (a) forming an adduct of ammonia or an aliphatic amino compound having an amino group (compound A) with methyl acrylate, adding an alkylenediamine having 2 to 12 carbon atoms to the adduct to carry out an ester-amide exchange reaction (b), thereby obtaining a polyamino compound (B) having a total of 2 to 100 aliphatic primary amino and secondary amino groups per molecule and having a number average molecular weight of 170 to 10,000, and forming an adduct of the polyamino compound (B) with an acrylic acid ester (C) of the formula (1),CH.sub.2 =CHCOO--R.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: January 6, 1998
    Assignee: Toyo Ink Manufacturing Co., Ltd.
    Inventors: Miki Kawashima, Takeo Yamaguchi, Toru Kurihashi, Norifumi Watanabe
  • Patent number: 5703199
    Abstract: To prepare nitrogen-containing aromatic polymers, for example polyamides, polyimides and polybenzimidazoles, polyvalent aromatic carboxylic acids and aromatic diamines and/or aminocarboxylic acids or reactive derivatives thereof are reacted in a high-boiling inert solvent with the addition of a heat-stable dispersing auxiliary, and volatile by-products formed in this reaction are distilled off. When the reaction has ended, the batch is cooled and the polymer formed is filtered off.
    Type: Grant
    Filed: October 5, 1995
    Date of Patent: December 30, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Andree Henze, Gordon Calundann
  • Patent number: 5691443
    Abstract: Aramids which after drawing have high tensile strengths and tensile moduli are made from units derived from selected 2,2'-disubstituted-4,4'-diaminobiphenyls, p-phenylenediamine, oxydianiline and terephthalic acid. Also disclosed is a process for drawing such aramids at least 1.5%, which results in the drawn aramid having significant crystallinity and higher tensile strength. The aramids are useful for ropes and composites.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: November 25, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert Samuel Irwin
  • Patent number: 5688901
    Abstract: Partly aromatic semicrystalline thermoplastic polyamide molding compositions containA) from 40 to 100% by weight of a copolyamide composed ofa.sub.1) from 30 to 44 mol % of units which are derived from terephthalic acid,a.sub.2) from 6 to 20 mol % of units which are derived from isophthalic acid,a.sub.3) from 43 to 49.5 mol % of units which are derived from hexamethylenediamine anda.sub.4) from 0.5 to 7 mol % of units which are derived from aliphatic cyclic diamines of 6 to 30 carbon atoms,the molar percentages of components a.sub.1) to a.sub.4) together giving 100%, andB) from 0 to 50% by weight of a fibrous or particulate filler,C) from 0 to 30% by weight of an elastomeric polymer andD) from 0 to 30% by weight of conventional additives and processing assistants,the percentages by weight of components A) to D) together giving 100%.
    Type: Grant
    Filed: February 6, 1995
    Date of Patent: November 18, 1997
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Fisch, Gunter Pipper, Klaus Muhlbach, Heiner Gorrissen
  • Patent number: 5646234
    Abstract: A process for producing fibers or films by the steps of:a) preparing an aromatic polyamide by polycondensation of dicarbonyl dihalides or mixtures thereof with at least two diamines in N-alkyllactams as a solvent, the polycondensation being of at least 90 mol %, based on the total amount of dicarbonyl dihalides in the reaction mixture, of compounds of the formula I or mixtures of such compoundsHal--OC--Ar.sup.1 --CO--Hal (I)with at least 90 mol%, based on the total amount of diamines in the reaction mixture, of compounds of the formula II and optionally III or mixtures of such compoundsH.sub.2 N--Ar.sup.2 --NH.sub.2 (II), H.sub.2 N--Ar.sup.3 --NH.sub.2 (III)where Ar.sup.1, Ar.sup.2 and Ar.sup.
    Type: Grant
    Filed: April 4, 1995
    Date of Patent: July 8, 1997
    Assignee: Hoechst AG
    Inventors: Holger Jung, Richard Neuert, Peter Klein, Georg-Emerich Miess
  • Patent number: 5641856
    Abstract: A re-moldable cross-linked resin comprising polymer chains which are connected to one another via Diels-Alder adducts obtainable from a dienophile and a diene, the latter being a 2,5-dialkyl substituted furan.
    Type: Grant
    Filed: November 15, 1995
    Date of Patent: June 24, 1997
    Assignee: Shell Oil Company
    Inventor: Jan Hermen Hendrik Meurs
  • 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: 5612446
    Abstract: The invention relates to a barrier layer resisting the transmission of oxygen for multi-layer barrier film characterized in that it is made of a transparent copolyamide comprising three components. The first component is hexamethylenediamine and adipic acid. The second component is hexamethylenediamine and azelaic acid, hexamethylenediamine and sebacic acid, and mixtures thereof. The third component is hexamethylene-diamine and isophthalic acid, hexamethylenediamine and terephthalic acid, and mixtures thereof. The total of all components is 100 mol %, and the ratio of the barrier effects in the barrier layer with respect to carbon dioxide and oxygen is at least 3:1.
    Type: Grant
    Filed: March 24, 1994
    Date of Patent: March 18, 1997
    Assignee: EMS-Inventa AG
    Inventors: Ulrich Presenz, Manfred Hewel
  • Patent number: 5612449
    Abstract: A nonlinear optical material composed of a polyimide obtained from a diamine and/or a diacid anhydride or dithioacid anhydride substituted by a portion having a nonlinear optical effect or of molecules having a benzocyclobutene structure substituted at the portions having an nonlinear linear optical effect.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: March 18, 1997
    Assignee: Fujitsu Limited
    Inventors: Wataru Sotoyama, Satoshi Tatsuura, Tetsuzo Yoshimura, Azuma Matsuura, Tomoaki Hayano
  • Patent number: 5599899
    Abstract: A class of rigid rod and latter polymers having light emitting capability is provided. Included in this class of polymers are those having novel repeating structural units. These rigid rod and ladder polymers are employed in light emitting diodes.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: February 4, 1997
    Assignee: Research Corporation Technologies, Inc.
    Inventors: Samson A. Jenekhe, John A. Osaheni
  • Patent number: 5597890
    Abstract: The present invention is directed to an exciplex formed from a .pi.-conjugated polymer and an electron donor or acceptor component. The present invention also relates to assemblies comprising said exciplex, their use in optoelectrical devices and method of enhancing optoelectrical properties of .pi.-conjugated polymers by forming said exciplex.
    Type: Grant
    Filed: January 26, 1994
    Date of Patent: January 28, 1997
    Assignee: Research Corporation Technologies, Inc.
    Inventor: Samson A. Jenekhe
  • Patent number: 5597888
    Abstract: The invention relates to a process for the production of high molecular weight polyamide 6 (polycaprolactam).
    Type: Grant
    Filed: June 9, 1995
    Date of Patent: January 28, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Werner Nielinger, Andreas Gittinger, Edgar Ostlinning, Karsten-Josef Idel, Helmut Schulte
  • Patent number: 5594093
    Abstract: A nonlinear optical polymer material comprising at least one polymer selected from the group consiting of polyimides, acrylic resins and benzocyclobutene resins containing, as a guest molecule, as a side chain, or in the main chain, a molecule or a chemical moiety having a basic structure of merocyanine dye represented by the formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 independently represent hydrogen or an organic group, provided that R.sup.1 and R.sup.2 or R.sup.3 and R.sup.5 may independently combine together to form an organo ring structure, and n is an integer of 1 to 3.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: January 14, 1997
    Assignee: Fujitsu Limited
    Inventors: Wataru Sotoyama, Satoshi Tatsuura, Tetsuzo Yoshimura, Azuma Matsuura, Tomoaki Hayano
  • Patent number: 5587447
    Abstract: A method for producing a copolyamide, which comprises (1) heating either one dicarboxylic acid selected from the group consisting of adipic acid and a mixture containing 40 mol % or more of adipic acid to a temperature higher than the melting point of adipic acid but lower than a temperature lower by 30.degree. C. than the melting point of the resulting copolyamide, (2) dropping a diamine comprising paraxylylene diamine and metaxylylene diamine into the heated dicarboxylic acid before a conversion of the dicarboxylic acid reaches 90 mol %, (3) stopping dropping of the diamine before the conversion of the dicarboxylic acid reaches 90 mol %, and dropping metaxylylene diamine or a diamine mixture of metaxylylene diamine and paraxylylene diamine in place of the diamine until a molar ratio of the total of the diamines to the total of the dicarboxylic acids becomes 0.97 to 1.03, and (4) heating a reaction system to a temperature higher than a temperature lower by 30.degree. C.
    Type: Grant
    Filed: April 5, 1995
    Date of Patent: December 24, 1996
    Assignee: Mitsubishi Gas Chemical Co., Inc.
    Inventors: Masahiro Harada, Yasuo Inaba
  • Patent number: 5580950
    Abstract: A class of soluble polymers having a rigid rod backbone, which when used to cast films, undergo a self-orientation process whereby the polymer backbone becomes more or less aligned parallel to the film surface. This in-plane orientation results in a film that displays negative birefringence. The degree of in-plane orientation and thus, the magnitude of the negative birefringence is controlled by varying the backbone linearity and rigidity of the class of polymers which includes polyesters, polyamides, poly(amide-imides) and poly(ester-imides) through selection of substituents in the polymer backbone chain. By increasing the polymer backbone linearity and rigidity, the degree of in-plane orientation and associated negative birefringence can be increased, and that conversely, by decreasing the polymer backbone linearity and rigidity, the negative birefringence can be decreased.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: December 3, 1996
    Assignee: The University of Akron
    Inventors: Frank W. Harris, Stephen Z. D. Cheng
  • Patent number: 5576415
    Abstract: There are disclosed a method for drying and a method for solid-phase polymerizing a crystallizable polyamide being in an amorphous state which comprises regulating the moisture concentration in the polyamide at its glass transition temperature to at least 0.15% by weight as determined by Karl Fisher titration; heating the polyamide thus regulated at a pressure of at least one arm without reducing the moisture to crystallize the same up to a crystallinity of at least 15% and; further heating the polyamide thus crystallized at a temperature lower than its melting point under reduced pressure with a batchwise heating apparatus.
    Type: Grant
    Filed: August 7, 1995
    Date of Patent: November 19, 1996
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventor: Kazumi Tanaka
  • Patent number: 5571891
    Abstract: Aromatic copolyamides, production thereof, formed structures and production thereofDescribed are aromatic copolyamides comprising the structural repeat units of the formulae I, II and III ##STR1## where Ar.sup.1, Ar.sup.2, Ar.sup.3 and Ar.sup.
    Type: Grant
    Filed: April 5, 1995
    Date of Patent: November 5, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Holger Jung, Richard Neuert, Peter Klein
  • Patent number: 5552221
    Abstract: Described is a method for preparing a polybenzazole filament which comprises extruding a polybenzazole dope filament, drawing the filament across an air gap, coagulating and washing the filament, and drying the filament, characterized in that a solution of a compound selected from the group consisting of ferrocenes, ruthocene, iodide-, cobalt-, and copper-containing compounds, dyes, and mixtures thereof is contacted with a filament subsequent to the washing step and prior to the drying step. This method provides a means to improve the tensile strength retention of damaged polybenzazole filaments following exposure to sunlight.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: September 3, 1996
    Assignee: The Dow Chemical Company
    Inventors: Ying H. So, Steven J. Martin, Chieh-Chun Chau, Ritchie A. Wessling, Ashish Sen, Katsuhiko Kato, Daniel B. Roitman, Willie E. Rochefort
  • Patent number: 5543492
    Abstract: Aramid polymers with small amounts of alkyl- and/or alkoxy-substitution on their aromatic diamine and/or aromatic diacid monomeric units are disclosed. Such aramid polymers show improved properties compared to similar aramids without the substitution. The aramids described herein are useful for films or fibers, for example, as employed in the manufacture of packaging, ropes, filter bags, or composites. The invention also includes a process for making such polymers, involving subjecting fibers or films made from such aramid polymers to heat treatment under tension.
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: August 6, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert S. Irwin
  • Patent number: 5493000
    Abstract: This invention relates to a branched fractal three dimensional porous polymer species which comprises rigid aromatic recurring units having electrophilic or nucleophilic reactive moieties on the exterior thereof. Another aspect of this invention relates to a star polymer comprising a polymeric core formed of the fractal polymers (FPS) of this invention having linear polymeric moieties grafted to the exterior thereof by way of residues formed by reaction between the reactive moieties on the exterior of the fractal polymer (FP) and complimentary reactive moieties on a linear polymer. Yet another aspect of this invention relates to polymeric composites comprising a polymer matrix having dispersed therein the star polymers of this invention.
    Type: Grant
    Filed: August 23, 1993
    Date of Patent: February 20, 1996
    Assignee: AlliedSignal Inc.
    Inventor: Shaul M. Aharoni
  • Patent number: 5463063
    Abstract: Cyclic imides are inhibitors of tumor necrosis factor .alpha. and can be used to combat cachexia, endotoxic shock, and retrovirus replication. A typical embodiment is 2-(2,6-dioxo-3-piperidinyl)-4-azaisoindoline-1,3-dione.
    Type: Grant
    Filed: October 20, 1993
    Date of Patent: October 31, 1995
    Assignee: Celgene Corporation
    Inventor: George W. Muller