Aryl-containing Reactant Patents (Class 528/331)
  • Patent number: 5459231
    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: February 27, 1991
    Date of Patent: October 17, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert S. Irwin
  • Patent number: 5422418
    Abstract: The present invention relates to new polyamides comprising, on a mass basis:(a) 45 to 75% of an x,T unit, x being between 4 and 12 inclusive, the x,T unit being the condensation product of a diamine having x carbon atoms and of terephthalic acid, and(b) 55 to 25% of an aliphatic unit -HN-(CH.sub.2).sub.n -CO, n being between 6 and 14 inclusive. and the terpolyamides obtained by including a monomeric unit (c) such as the unit 6 or 6,I as a replacement for part of the aliphatic unit (b).The polyamide compositions thus obtained exhibit a Tg lower than 130.degree. C., a Tm higher than 230.degree. C. and a good crystallizability.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: June 6, 1995
    Assignee: Elf Atochem S.A.
    Inventors: Philippe Maj, Jean-Marc Sage, Philippe Blondel, Didier Judas
  • Patent number: 5422420
    Abstract: Polyamides and polyamide fibers having a major proportion of hexamethyleneadipamide units and minor proportions of at least two other amide units, one of those other amide units being those of 2-methylpentamethylenediamine are disclosed.
    Type: Grant
    Filed: May 19, 1993
    Date of Patent: June 6, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ketan G. Shridharani
  • Patent number: 5420224
    Abstract: Poly(arylene ether)ketones, polyamides, and poly(benzoxazoles) that contain thiophene rings within the aromatic polymer backbone are disclosed, along with fibers, films, and other articles of manufacture formed therefrom.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: May 30, 1995
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: Edward T. Samulski, Joseph M. DeSimone
  • Patent number: 5416143
    Abstract: The invention relates to readily processible polyamide molding compounds which have very good mechanical and electrical properties as well as high surface quality and are based on polyamide, magnesium hydroxide and polyhydroxy compounds of the Novolak type.
    Type: Grant
    Filed: December 27, 1993
    Date of Patent: May 16, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Aziz El Sayed, Edgar Ostlinning, Karsten-Josef Idel, Dieter Freitag
  • Patent number: 5408034
    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 4, 1992
    Date of Patent: April 18, 1995
    Assignee: Alcatel Alsthom Compagnie Generale D'Electricite
    Inventors: Stanislas Galaj, Alain Le Mehaute
  • Patent number: 5405661
    Abstract: A structural panel for a vehicle or building contains a substrate and a layer of flame resistant polybenzazole polymer. If the substrate is heat resistant, the panel can serve as a fire barrier. If the substrate is not heat resistant, the polybenzazole layer can still serve to delay ignition and contain any volatile gases and molten polymer that forms when the panel is subjected to heat.
    Type: Grant
    Filed: August 14, 1992
    Date of Patent: April 11, 1995
    Assignee: The Dow Chemical Company
    Inventors: Peter K. Kim, Peter E. Pierini, Ritchie A. Wessling
  • Patent number: 5395917
    Abstract: Thermoplastic poly(imide-esters) and poly(imide-amides) with repeat units derived from the title amino acid. In the polymer the amino group becomes part of an imide group and the carboxyl group becomes part of an ester or amide group. The polymers have a good balance of properties, making them useful for melt forming shaped articles, films and fibers.
    Type: Grant
    Filed: May 21, 1993
    Date of Patent: March 7, 1995
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Robert S. Irwin
  • Patent number: 5393872
    Abstract: This invention relates to a sheetlike wholly aromatic polyamide shaped article useful as electrical insulating materials excellent in corona resistance (corona durability) and in surface smoothness. The corona durability of said sheetlike shaped article is increased to 150 minutes or above by adding a nonionic polymer flocculant to an aqueous dispersion comprising 10 to 90% by weight of mica particles, preferably treated with a silane coupling agent and 90 to 10% by weight of a wholly aromatic polyamide stock (fibrids and fibers) in obtaining the sheetlike shaped article from the aqueous dispersion by wet shaping.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: February 28, 1995
    Assignee: Teijin Limited
    Inventors: Takanori Shinoki, Akio Nakaishi, Michio Yamamoto
  • Patent number: 5380818
    Abstract: A novel aromatic diamino amide monomer of the structural formula (I), a novel aromatic polyamide of the structural formula (II) prepared by polycondensation of the monomer and an aromatic diacid halide, and an aromatic polyamide film produced from the polyamide which has high strength as well as high modulusity. ##STR1## wherein, each of two NH.sub.2 groups may be in meta or para-position to the amide bond. ##STR2## wherein, Ar represents a phenyl group, X represents CONH.sub.2 group in ortho-position to the amide bond, Y represents H, Cl, Br, I, NO.sub.2 or an alkyl or alkoxy group having 1 to 4 carbon atom, and n represents an integer between 10 and 100,000.
    Type: Grant
    Filed: July 16, 1993
    Date of Patent: January 10, 1995
    Assignee: Kolon Industries, Inc.
    Inventors: Tae-jin Oh, Jin-sa Kim
  • Patent number: 5378799
    Abstract: Heat-stable polyimides and polyamideimides with modified benzhydrol structural elements and a process of preparing thereof; wherein the polyimides and polyamideimides are obtained by reacting 3,3'4,4'-benzhydroltetracarboxylic acid dimethyl ester a) with only a diamine and then cyclized to give polyimides or b) with a diamine and with trimellitic, phthalic-or isophthalic acid (or the anhydrides, acid chlorides, anhydride chlorides or esters) and is then cyclized to give polyamideimides.
    Type: Grant
    Filed: September 13, 1993
    Date of Patent: January 3, 1995
    Assignee: Chemie Linz GmbH
    Inventors: Gerhard Greber, deceased, Heinrich Gruber, Marcel Sychra
  • Patent number: 5378807
    Abstract: A method is disclosed for significantly diminishing the rate of degradation of naturally-produced .gamma.-PGA in a .gamma.-PGA-producing cell culture. Also, a method is disclosed for significantly decreasing the water solubility coefficient of naturally-produced .gamma.-PGA by forming derivatives of .gamma.-PGA. In addition, a polymer solution is disclosed which includes a polysaccharide component and a .gamma.-PGA component.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: January 3, 1995
    Assignee: University of Massachusetts at Lowell
    Inventors: Richard A. Gross, Stephen P. McCarthy, Devang T. Shah
  • Patent number: 5373085
    Abstract: Memory enhancing thermal proteins were synthesized from heating aspartic acid, glutamic acid, proline and tryptophan above 100.degree. C. Two hydrophobic and one non-hydrophobic polymer were injected intracerebroventricularly into the brains of mice after the mice had undergone partial training in footshock avoidance conducted in a T-maze. When retention of footshock avoidance was tested one week later, the hydrophobic polymers enhanced retention while the non-hydrophobic polymer did not.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: December 13, 1994
    Inventors: Sidney W. Fox, James F. Flood
  • Patent number: 5352764
    Abstract: A stepwise linear polymer composition having intense magnetic properties and a method for preparation of same. A phthalimide compound and an aromatic dialiphatic acid are reacted in the presence of an acetate of monovalent metal at elevated temperatures to form a phenylenebis diphthalimidine compound. The phenylenebis diphthalimidine compound is then reacted with 3-benzylidine phthalimidine and a metal salt of an aliphatic acid at elevated temperatures under an inert gas to form the intensely magnetic polymer. The reactions may be carried out in the presence of a solvent.
    Type: Grant
    Filed: October 26, 1993
    Date of Patent: October 4, 1994
    Assignee: Northrop Corporation
    Inventor: Jack D. Mackey
  • Patent number: 5346985
    Abstract: Aramids, which in the drawn state have high tensile strengths tensile elongations, and tensile moduli, are made from units derived from selected 2,2'-disubstituted-4,4'-bibenzoic acids, 3,4'-oxydibenzoic acid or 3,4'-dicarboxybenzophenone, p-phenylenediamine, and optionally terephthalic acid. The aramids are useful for ropes and composites.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: September 13, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert S. Irwin
  • Patent number: 5340915
    Abstract: A crosslinked polymer composition having intense magnetic properties and a method for preparation of same. A phthalimide compound and an aromatic dialiphatic acid are reacted in the presence of an acetate of a monovalent metal at elevated temperatures to form a phenylenebis diphthalimidine compound. The phenylenebis diphthalimidine compound is then reacted with a metal salt of an aliphatic acid at elevated temperatures under an inert gas to form the intensely magnetic crosslinked polymer. The reactions may be carried out in the presence of a solvent.
    Type: Grant
    Filed: May 4, 1993
    Date of Patent: August 23, 1994
    Assignee: Northrop Corporation
    Inventor: Jack D. Mackey
  • 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: 5334694
    Abstract: Aromatic copolyamides are described which are soluble in organic polyamide solvents and which comprise the recurring structural units of the formulae Ia, Ib, Ic and Id[--OC--R.sup.1 --CO--NH--R.sup.2 --NH--] (Ia),[--OC--R.sup.1 --CO--NH--R.sup.3 --NH--] (Ib),[--OC--R.sup.1 --CO--NH--R.sup.4 --NH--] (Ic),[--OC--R.sup.1 --CO--NH--R.sup.5 --NH--] (Id)in whichR.sup.1 and R.sup.2 are mainly unsubstituted divalent aromatic radicals, the valency bonds of which are in the para-position or in a comparable coaxial or parallel position with respect to one another,R.sup.3 is a radical of the formula II ##STR1## R.sup.4 is a radical of the formula III--Ar.sup.1 --O--Ar.sup.1 --O--Ar.sup.1 -- (III), andR.sup.5 is a radical of the formula IV and/or V ##STR2## in which Ar.sup.1 has one of the meanings defined for R.sup.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: August 2, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Holger Jung, Peter Klein, Karl Heinrich
  • Patent number: 5331081
    Abstract: Use of fluorinated aromatic polyamides as orientation layer for liquid crystal switching and display devicesUse of substituted aromatic polyamides as orientation layer in liquid crystal switching and display elements is described, in which the polyamides contain structural units of the formula (I) ##STR1## in which in formula I the symbols have the following meaning: ##STR2## in which R.sup.1 and R.sup.2 are identical or different and are perfluorinated alkyl having 1 to 4 carbon atoms, R.sup.3 and R.sup.4 are identical or different and are H or CF.sub.3, and in which --W-- is, for example, --O--, --C(CH.sub.3).sub.2 --, --C(CF.sub.3).sub.2 --.Orientation layers made of these polyamides can be cured at low temperatures, have good adhesion and high transmittance and allow for a high surface tilt angle.
    Type: Grant
    Filed: April 21, 1992
    Date of Patent: July 19, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Rolf Dubal, Mikio Murakami, Otto Herrmann-Schonherr, Arnold Schneller
  • Patent number: 5321096
    Abstract: A thermoplastic resin composition comprise 99.9.about.50 parts by weight of one or more thermoplastic resin selected from the group consisting of aromatic polyimide, aromatic polyetherimide, aromatic polyamideimide, aromatic polyethersulfone and aromatic polyether ketone and 0.1.about.50 parts by weight of one or more liquid crystal type aromatic polyimide having recurring structural units represented by the formula (1): ##STR1## wherein R.sub.1 .about.R.sub.5 is a hydrogen atom, fluorine atom, trifluoromethyl, methyl, ethyl or cyano and may be the same or different, and R is a tetravalent radical having 6.about.27 carbon atoms and being selected from the group consisting of a monoaromatic radical, condensed polyaromatic radical and noncondensed aromatic radical connected each other with a direct bond or a bridge member.
    Type: Grant
    Filed: March 22, 1993
    Date of Patent: June 14, 1994
    Assignee: Mitsui Toatsu Chemical, Incorporated
    Inventors: Yuichi Okawa, Nobuhito Koga, Hideaki Oikawa, Tadashi Asanuma, Akihiro Yamaguchi
  • Patent number: 5310860
    Abstract: A process for the manufacture of polyamides consisting essentially of the stages of:(i) reacting 10 to 90% by weight of the aliphatic and/or cycloaliphatic and/or aromatic-aliphatic diamines (c) with a lactam and/or corresponding amino acid (a) or the substantially stoichiometric combination of one or more aliphatic diamine(s) and of one or more dicarboxylic aliphatic acid(s) and with the aromatic diacid (b); and(ii) reacting the remainder of the aliphatic and/or cycloaliphatic and/or aromatic-aliphatic diamine (c) with the oligomer produced in stage (i) in one or more substages.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: May 10, 1994
    Assignee: Elf Atochem, S.A.
    Inventors: Philippe Maj, Jean-Marc Sage, Philippe Blondel, Didier Judas
  • Patent number: 5298595
    Abstract: Partly aromatic copolyamides contain as essential componentsA) 40-90% by weight of units derived from terephthalic acid and hexamethylenediamine,B) 0-50% by weight of units derived from .epsilon.-caprolactam andC) 0-60% by weight of units derived from adipic acid and hexamethylenediamine,the components B) and/or C) accounting for a total of not less than 10% by weight of the total units and the copolyamide having a triamine content of less than 0.5% by weight.
    Type: Grant
    Filed: February 10, 1993
    Date of Patent: March 29, 1994
    Assignee: BASF Aktiengesellschaft
    Inventors: Horst Reimann, Gunter Pipper, Hans-Peter Weiss, Christoph Plachetta, Eckhard M. Koch
  • Patent number: 5294463
    Abstract: This invention concerns new molecules with active, non-linear optical properties and which can be thermally reticulated (more precisely, these molecules include terminal functions which can be reticulated, attached to either side of the groups active in non-linear optics, which can be oriented under an electrical field). When reticulated and oriented under an electrical field, these materials are particularly stable and can be employed for industrial applications, using non-linear optics (electrooptical modulators, frequency doublers, etc.).
    Type: Grant
    Filed: June 12, 1992
    Date of Patent: March 15, 1994
    Assignee: Thompson-CSF
    Inventors: Pierre Le Barny, Evelyne Chastaing, Jean-Claude Dubois, Sophie Muller, Francoise Soyer
  • Patent number: 5292856
    Abstract: High molecular weight polyamides having benzidine linkages are prepared using certain substituted benzidine monomers.
    Type: Grant
    Filed: April 8, 1993
    Date of Patent: March 8, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert S. Irwin
  • Patent number: 5286838
    Abstract: Thermotropic liquid crystalline copolyamides comprise: (a) a thermoplastic, aliphatic polyamide, such as nylon-6,6; and (b) a mesogen comprising an amide-linked aromatic group segment which is not completely para-linked (namely, is substantially ortho- or meta-linked or a mixture of ortho- and meta-linked) by an amide linkage to an alkylene amide group contained in the mesogen.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: February 15, 1994
    Assignee: Akzo N.V.
    Inventors: Jan G. Nel, Gert Boven
  • Patent number: 5286833
    Abstract: A process for making PBZ fibers of ultra-high physical properties is given. Polybenzoxazole fibers made by the process of this invention have tensile strengths nearly double in value from what has been reported previously.
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: February 15, 1994
    Assignee: The Dow Chemical Company
    Inventors: Robert A. Bubeck, Stephen J. Nolan, Chieh-Chun Chau, Steven Rosenberg, Mark D. Newsham, Myrna Serrano
  • Patent number: 5286811
    Abstract: A preferred class of polyimide oligomers include (1) linear, difunctional crosslinking oligomers prepared by condensing an imidophenylamine end cap with a lower alkylene diamine or a polyaryldiamine such as 3,3'-phenoxyphenylsulfone diamine and with a dianhydride, particularly 4,4'-phenoxyphenylsulfone dianhydride; and (2) multidimensional, crosslinking, polyimide oligomers having an aromatic hub and at least two radiating arms connected to the hub, each arm including a crosslinking imidophenylamine end cap at its distal end and at least two imide linkages.Blends, prepregs, and composites can be prepared from the oligomers.
    Type: Grant
    Filed: May 21, 1992
    Date of Patent: February 15, 1994
    Assignee: The Boeing Company
    Inventors: Hyman R. Lubowitz, Clyde H. Sheppard
  • Patent number: 5274071
    Abstract: A wholly aromatic polyamide capable of being dissolved in organic solvents to form an isotropic dope solution and having an excellent chemical resistance, heat resistance, processability and mechanical strength and a high modulus, comprises recurring aromatic dicarbonyl units of the formulae: ##STR1## and recurring aromatic diamine units of the formulae: ##STR2## wherein R and R' are a hydrogen or halogen atom or an alkyl or alkoxyl radical, n is 1 to 3, and p and q are 1 to 4.
    Type: Grant
    Filed: February 1, 1991
    Date of Patent: December 28, 1993
    Assignee: Teijin Limited
    Inventors: Toshihiro Santa, Tsutomu Kiriyama
  • Patent number: 5266672
    Abstract: Aromatic copolyamides are described which are soluble in organic polyamide solvents and which essentially consist of the recurring structural units of the formulae Ia, Ib and Ic ##STR1## wherein R.sup.1 and R.sup.4 are divalent aromatic radicals, the valency bonds of which are in the para position or in a comparable coaxial or parallel position relative to one another, R.sup.2 is a radical of the formula III ##STR2## and R.sup.3 is a radical of the formula IV ##STR3## The mole fractions of the individual structural features in the copolyamides are fixed within selected limits. Fibers composed of the copolyamides claimed are distinguished by a high stretchability.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: November 30, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Georg-Emerich Miess, Peter Klein, Karl Heinrich
  • Patent number: 5264543
    Abstract: Hyperbranched aramids, made from an aromatic aminodicarboxylic acid or an aromatic aminodicarboxylic acid, and optionally an aromatic aminocarboxylic acid are disclosed. The hyperbranched aramids are useful as aids for the processing of aramid solutions. Also disclosed are novel monomers used to make the hyperbranched aramids.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: November 23, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Young H. Kim
  • Patent number: 5264542
    Abstract: A process for preparing shaped polybenzimidazole sintered products having increased resistance to dimensional modification by absorption of water and the products prepared therefrom.
    Type: Grant
    Filed: May 27, 1992
    Date of Patent: November 23, 1993
    Assignee: Hoechst Celanese Corp.
    Inventors: O. Richard Hughes, Dieter Kurschus
  • Patent number: 5262514
    Abstract: Substituted and unsubstituted di-phthalonitrile monomers devoid of ether /or phenoxy groups are solid at room temperature and which monomers are defined by the following general formula: ##STR1## where R is an aromatic tetravalent radical, thermoplastic prepolymers and thermosetting polymers which polymers are solid at room temperature and have a defined glass transition temperature if said polymers are cured at a temperature below a critical temperature or are devoid of a glass transition temperature if said polymers are postcured at a temperature exceeding said critical temperature.
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: November 16, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Teddy M. Keller
  • Patent number: 5247055
    Abstract: The present invention discloses new polymers which can assume an accordion-like conformation of the backbone. These polymers are prepared by the copolymerization of two difuntional, chemically precoupled precursors to chromophoric units. The resulting polymers have a head-to-head, tail-to-tail topology (a syndioregic arrangement of rigid units along the polymer backbone), and the molecular units are designed to fold into an "accordion" conformation. This useful microstructure (a three-dimensional conformation) forms spontaneously (self-assembles); or, it can be brought about by field-assisted processing. Films and fibers of these polymers have useful second-order nonlinear optical properties, and may be used for the modulation and switching of optical communications signals.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: September 21, 1993
    Inventors: John D. Stenger-Smith, Ronald Henry, James Hoover, Geoffrey Lindsay, John Fischer, Kenneth J. Wynne
  • Patent number: 5243023
    Abstract: New, thermooxidatively stable polyimides have been prepared from the reaction of aromatic dianhydrides containing isopropylidene bridging groups with aromatic diamines containing amide connecting groups between the rings. Several of these polyimides were shown to be semi-crystalline as evidenced by wide angle xray scattering and differential scanning calorimetry. Most of the polyimides form tough, flexible films with high tensile properties. These polyimide films exhibit enhanced solubility in organic solvents.
    Type: Grant
    Filed: August 28, 1991
    Date of Patent: September 7, 1993
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: James F. Dezern
  • Patent number: 5229484
    Abstract: An N-substituted polyamide-imide essentially composed of identical or different repeating units of the formula I ##STR1## where R.sup.1 is one of the following tetravalent aromatic radicals ##STR2## and X is a bond or one of the following linkers ##STR3## where R.sup.2 and R.sup.4 are each, independently of one another, one of the following divalent aromatic radicals ##STR4## and where X has the abovementioned meanings and where R.sup.3 is hydrogen or a monovalent radical such as C.sub.1 -C.sub.6 -alkyl or phenyl, and the C.sub.1 -C.sub.6 -alkyl-, C.sub.1 -C.sub.6 -alkoxy-, aryl- or halogen-substituted derivatives thereof, and precursors (monomers) therefor, are described.
    Type: Grant
    Filed: January 17, 1992
    Date of Patent: July 20, 1993
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Wolf, Juergen Koch
  • Patent number: 5223335
    Abstract: A process for the production of a fiber-reinforced composite material, which comprises the steps of(1) preparing a polymeric composition containing a substantially linear aromatic oligomer having a terminal aliphatic hydroxyl group, bis(acylcaprolactam) and a catalyst which promotes a ring opening-addition reaction of a hydroxyl group and a caprolactam ring,(2) melting the polymeric composition and impregnating it into a fibrous reinforcing material to form a impregnated product, and(3) heating the impregnated product up to a temperature sufficient to open the caprolactam ring while inhibiting elimination of caprolactam thereby to form, as a matrix resin, a thermoplastic copolymer having an ester group and an amide group in its main chain;and a fiber-reinforced composition material produced by the above-mentioned process.
    Type: Grant
    Filed: March 13, 1992
    Date of Patent: June 29, 1993
    Assignee: Teijin Limited
    Inventors: Hiroo Inata, Shunichi Matsumura, Takashi Yoshitomi
  • Patent number: 5216110
    Abstract: Azole rings, such as oxazole and thiazole rings, can activate an aromatic ring bonded to a leaving group such as a halogen atom so that the aromatic ring will undergo aromatic nucleophilic substitution. The reaction is useful for making ethers, thioethers and amines containing azole rings. In particular, monomers having azole rings, activated aromatic rings with leaving groups and nucleophilic moieties can react under conditions of aromatic nucleophilic displacement to form non-rigid rod PBZ polymers. The non-rigid rod PBZ polymers can be used to form molecular composites with rigid rod PBZ polymers which molecular composites are not substantially phase separated.
    Type: Grant
    Filed: January 10, 1992
    Date of Patent: June 1, 1993
    Assignee: The Dow Chemical Company
    Inventors: Muthiah N. Inbasekaran, Michael J. Mullins
  • Patent number: 5212269
    Abstract: Processible chromophoric polymers having nonlinear optical properties and wherein the chromophore is present in and is a part of the polymer backbone, including substantially all of the monomer or repeat units, with the dipole moments pointing in the same direction (head-to-tail) along the polymer backbone. Such polymers include phenylene, phenylene vinylene, stilbenylene, phenyl piperdine, and coumarin polymers.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: May 18, 1993
    Inventors: John Fischer, Ronald Henry, James Hoover, Geoffrey Lindsay, John Stenger-Smith, Andrew P. Chafin
  • Patent number: 5212279
    Abstract: A hot-melt adhesive comprising a special polyamideimide or polyamide is excellent in heat resistance and adhesive strength and usable for providing substrates for printed circuit boards.
    Type: Grant
    Filed: October 22, 1990
    Date of Patent: May 18, 1993
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Yoshihiro Nomura, Takashi Morinaga, Toshiaki Fukushima, Hiroshi Minamisawa, Kazuhito Hanabusa
  • Patent number: 5202410
    Abstract: Certain substituted benzidines enable the preparation of linear chain, high molecular weight polyimides based on benzidine.
    Type: Grant
    Filed: October 21, 1991
    Date of Patent: April 13, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert S. Irwin
  • Patent number: 5196509
    Abstract: In one embodiment this invention provides polymalonamide polymers with side chains which exhibit nonlinear optical response.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: March 23, 1993
    Assignee: Hoechst Celanese Corp.
    Inventor: Diane E. Allen
  • Patent number: 5196501
    Abstract: Preparation of specially substituted aromatic polyamides containing structural units of the formula I mentioned and copolyamides containing at least 10 mol % of structural units of the formula I and structural units of the formula II mentioned and their use as orientation layer in liquid crystal display elements and/or liquid crystal switching elements.
    Type: Grant
    Filed: December 17, 1991
    Date of Patent: March 23, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Rolf Dubal, Mikio Murakami, Otto Herrmann-Schonherr, Arnold Schneller
  • Patent number: 5194568
    Abstract: It is advantageous to prepare oligomers of polybenzazole polymers by reaction of AA-PBZ monomer with an excess of BB-PBZ monomer. The resulting oligomer dopes may be stored at a temperature at which they remain pumpable until such time as the dope can be advanced to higher molecular weight by adding additional AA-PBZ monomer. The molecular weight of the polymer may be adjusted by controlling the amount of chain extender and/or chain terminator added to oligomer mixtures as they are advanced to final molecular weight.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: March 16, 1993
    Assignee: The Dow Chemical Company
    Inventors: Thomas Gregory, Carl W. Hurtig, Harvey D. Ledbetter, Kenneth J. Quackenbush, Steven Rosenberg, Ying H. So
  • Patent number: 5194562
    Abstract: Azole rings, such as oxazole and thiazole rings, can activate an aromatic ring bonded to a leaving group such as a halogen atom so that the aromatic ring will undergo aromatic nucleophilic substitution. The reaction is useful for making ethers, thioethers and amines containing azole rings. In particular, monomers having azole rings, activated aromatic rings with leaving groups and nucleophilic moieties can react under conditions of aromatic nucleophilic displacement to form non-rigid rob PBZ polymers. The non-rigid rod PBZ polymers can be used to form molecular composites with rigid rod PBZ polymers which molecular composites are not substantially phase separated.
    Type: Grant
    Filed: January 10, 1992
    Date of Patent: March 16, 1993
    Assignee: The Dow Chemical Company
    Inventors: Muthiah N. Inbasekaran, Michael J. Mullins
  • Patent number: 5189141
    Abstract: High molecular weight aromatic polyamides with pendant carboxyl groups.
    Type: Grant
    Filed: April 30, 1991
    Date of Patent: February 23, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert S. Irwin
  • Patent number: 5177177
    Abstract: Rigid, amorphous copolyamides, which can be produced in a single-stage polycondensation reaction, having a high glass transition temperature and low water absorption capacity, consisting essentially of cycloaliphatic diamines, dimerized fatty acids, and aromatic dicarboxylic acids, and a method for the manufacture thereof.
    Type: Grant
    Filed: July 24, 1991
    Date of Patent: January 5, 1993
    Assignee: EMS-Inventa AG
    Inventors: Helmut Thullen, Eduard Schmid
  • Patent number: 5177178
    Abstract: Rigid, amorphous copolyamides which can be produced in a single-stage polycondensation reaction with a high glass transition temperature and low water absorption capacity, based on cycloaliphatic diamines, dimerized fatty acids and aromatic dicarboxylic acids.
    Type: Grant
    Filed: July 24, 1991
    Date of Patent: January 5, 1993
    Assignee: EMS-Inventa AG
    Inventors: Helmut Thullen, Eduard Schmid
  • Patent number: 5166307
    Abstract: Polyamides of the general formula [N(A)-X-N(B)-CO-Y-CO-].sub.n are described, in which Y denotes a divalent group, X a divalent radical whose chain contains at least two carbon atoms, A and B independently of one another denote H or a C.sub.1 to C.sub.26 alkyl group and n denotes an integer greater than 4. The said polyamides contain at least one alkyl group of C.sub.6 to C.sub.26 per repeating unit. The groups X and/or Y contain at leat one CH.sub.2 group in the chain. The polyamides are prepared by reaction of a diamine of the formula NHA-X-NHB with an about equimolar amount of a reactive derivative of a dicarboxylic acid of the formula COOH-Y-COOH. The polyamides obtained can be used in order to prepare highly ordered monomolecular LB films on a support. For this purpose, the polyamide is dissolved in a volatile organic solvent which is immiscible with water and the solution is spread on the water/air interface.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: November 24, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Harald Cherdron, Werner Prass, Ude Scheunemann, Donald Lupo
  • Patent number: 5162489
    Abstract: Diamines having a 1,1,3-trimethylphenylindane dicarboxylic moiety linked on both sides to phenylene diamine by an amide bond (PIDA diamines) are disclosed. By reacting these diamines with aromatic difunctional acid derivatives, amorphous polymers having high glass transition temperatures (Tg) can be prepared. If aliphatic diacid derivatives are used the resulting polymers have a lower Tg, but have the advantage of melt-processability. The PIDA-diamines can also be used in the preparation of polyimides, being reacted either with tri-or tetracarboxylic anhydrides or with imide group-containing acid derivatives.
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: November 10, 1992
    Assignee: Akzo N.V.
    Inventors: Cornelis R. H. I. De Jonge, Gerrit Hoentjen, Theodorus J. Bouwmans
  • Patent number: 5136016
    Abstract: Melt-processible aromatic polyamides are obtained by reacting certain N,N'-isophthaloyl bis(lactam) compounds with certain aromatic diamines.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: August 4, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Gurdial Singh, Andrew J. Sitter, Beth E. Dunlap, Mark F. Teasley