Bridged- Or Fused-ring-containing Reactant Other Than As Anhydride Fused To A Nonfused- Or Bridged-ring System Patents (Class 528/344)
-
Patent number: 10899527Abstract: The invention relates to a method for storage and for transport of polyamide granulate which comprises at least one amorphous or microcrystalline polyamide. By means of this novel method, yellowing during further processing to form the moulded article can be avoided or at least reduced. Likewise, the invention relates to a corresponding container in which the polyamide granulate is stored. The invention also relates to correspondingly stored or transported polyamide granulate and also moulded articles produced therefrom.Type: GrantFiled: December 20, 2016Date of Patent: January 26, 2021Assignee: EMS-Patent AGInventors: Martin Sütterlin, Thomas Wiedemann, Manfred Hewel, Sepp Bass
-
Publication number: 20150112020Abstract: The present invention relates to a polymer, and a composition containing a particulate solid, an aqueous medium, and a polymer chain having at least one fused aromatic imide pendant group. The invention further provides compositions for millbases, dispersions, coatings and inks.Type: ApplicationFiled: April 24, 2013Publication date: April 23, 2015Applicant: Lubrizol Advanced MAterials, Inc.Inventors: Andrew J. Shooter, Dean Thetford, Stuart N. Richards
-
Publication number: 20140221600Abstract: This invention relates to a biaxially stretched product comprising a copolyamide comprising monomeric units of: aliphatic non-cyclic diamines X and aliphatic non-cyclic dicarboxylic acids Y or aliphatic non-cyclic ?,?-amino acids Z, and diamines M and diacids N in an amount between 0.1 to 2 wt % based on the total amount of copolyamide, and in which M and N are cyclic, and wherein the product has been stretched at a temperature of between the glass transition temperature (Tg) and the melting temperature (Tm). A method of preparation is claimed, as well as a multilayer film comprising the biaxially stretched product.Type: ApplicationFiled: June 28, 2012Publication date: August 7, 2014Applicant: DSM IP ASSETS B.V.Inventors: Alexander Antonius Marie Sroeks, Serbia Tomic
-
Patent number: 8785590Abstract: The invention provides a polyamide having a dicarboxylic acid unit containing a decahydronaphthalenedicarboxylic acid unit in an amount of 60 mol % or more, and a diamine unit.Type: GrantFiled: August 18, 2010Date of Patent: July 22, 2014Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Kentaro Ishii, Shun Ogawa
-
Patent number: 8658757Abstract: Provided is a polyamide polymer in which a partial structure represented by the following formula (C) constitutes a portion of the main chain: wherein in Formula (C), RA and RB each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms; n and m each independently represent an integer from 0 to 2; Cy represents an unsaturated 6-membered or 7-membered ring which may contain a heteroatom; and * and ** each represent a bonding hand, while * may be a bonding hand extending from RA.Type: GrantFiled: June 20, 2013Date of Patent: February 25, 2014Assignee: Fujifilm CorporationInventors: Shigeki Uehira, Toshihide Yoshitani, Toshimitsu Sakuma, Kozo Sato
-
Patent number: 8426528Abstract: Processes for preparing crosslinked polymers using biomass derived materials, such as aldaric acids and derivatives, are provided. The polymers can be used as hydrogels.Type: GrantFiled: February 23, 2005Date of Patent: April 23, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Mark Allen Andrews, Garret D. Figuly, Henry Keith Chenault
-
Patent number: 8420768Abstract: Higher diamondoid derivatives capable of taking part in polymerization reactions are disclosed as well as intermediates to these derivatives, polymers formed from these derivatives and methods for preparing the polymers.Type: GrantFiled: December 20, 2010Date of Patent: April 16, 2013Assignee: Chevron U.S.A. Inc.Inventors: Jeremy E. Dahl, Robert M. Carlson, Shenggao Liu
-
Publication number: 20120172572Abstract: The invention provides a polyamide having a dicarboxylic acid unit containing a decahydronaphthalenedicarboxylic acid unit in an amount of 60 mol % or more, and a diamine unit.Type: ApplicationFiled: August 18, 2010Publication date: July 5, 2012Applicant: Mitsubishi Gas Chemical Company ,Inc.Inventors: Kentaro Ishii, Shun Ogawa
-
Publication number: 20120046438Abstract: A method for making polyamide is described. More particularly, a method for making a polyamide from at least one diacid and one diamine, that includes a step of concentrating an aqueous solution of diacid and diamine salt up to a salt weight concentration higher than 85%, and a polymerization step up to a desired polymerization degree is described.Type: ApplicationFiled: March 9, 2010Publication date: February 23, 2012Applicant: Rhodia OperationsInventors: Virginie Thieblemont, Jean-Francois Thierry
-
Patent number: 8084571Abstract: Disclosed are wholly aromatic polyamide filament and a method of manufacturing the same, characterized in that, in a process of preparing wholly aromatic polyamide polymer, a multiple tubular feed pipe for polymeric monomer and polymerization solvent with specific construction of adjacent inner paths 11a and outer paths 11b which are alternately arranged one another is used to feed either aromatic diacid chloride A or aromatic diamine dissolved in the polymerization solvent B into a polymerization reactor 20 through corresponding one among the inner and outer paths 11a and 11b. The present invention is effective to progress uniform and homogeneous polymerization over all of area of a polymerization reactor 20 leading to reduction of deviation in degree of polymerization, since polymeric monomers are miscible and react together very well immediately after putting the monomers into the reactor 20.Type: GrantFiled: May 21, 2009Date of Patent: December 27, 2011Assignee: Kolon Industries, Inc.Inventors: In-Sik Han, Jae-Young Lee, Seung-Hwan Lee, Chang-Bae Lee, So-Yeon Kwon
-
Publication number: 20110301324Abstract: A liquid crystal display is provided which is capable of reducing the occurrence of defective display due to variations in the initial alignment direction of a liquid crystal alignment control film in a liquid crystal display of an IPS scheme, realizing the stable liquid crystal alignment, providing excellent mass productivity, and having high image quality with a higher contrast ratio. The liquid crystal display has a liquid crystal layer disposed between a pair of substrates, at least one of the substrates being transparent, and an alignment control film formed between the liquid crystal layer and the substrate. At least one of the alignment control films 109 comprises photoreactive polyimide and/or polyamic acid provided with an alignment control ability by irradiation of substantially linearly polarized light.Type: ApplicationFiled: August 17, 2011Publication date: December 8, 2011Inventors: Yasushi Tomioka, Hidetoshi Abe, Katsumi Kondo
-
Publication number: 20110149220Abstract: An alignment layer according to an exemplary embodiment of the present invention includes a polyimide, wherein the polyimide is derived from a composition including a dianhydride-based compound, and a compound represented by a Chemical Formula 1: wherein, in the above Chemical Formula 1, X1 and X2 are independently F, Cl, or CN, and R1 is a substituted or non-substituted C1-C12 alkyl group, a substituted or non-substituted C1-C12 alkoxy group, a substituted or non-substituted C1-C12 halogen-containing alkyl group, a substituted or non-substituted C1-C12 halogen-containing alkoxy group, or a combination thereof.Type: ApplicationFiled: June 17, 2010Publication date: June 23, 2011Applicant: Samsung Electronics Co., Ltd.Inventors: Ho-Yun BYUN, Jeong-Uk Heo, Ji-Yoon Jung, Na-Young Shin
-
Publication number: 20100090206Abstract: Disclosed is a polymer light-emitting device having a light-emitting layer arranged between an anode and a cathode, and a hole transport layer arranged between the light-emitting layer and the anode. This polymer light-emitting device is characterized in that the hole transport layer is a layer containing a polymer compound which contains a repeating unit represented by the general formula (I) below, a repeating unit represented by the general formula (II) below and a repeating unit represented by the general formula (III) below. (In the formula (I), R1, R2, R3 and R4 may be the same or different and respectively represent a hydrogen atom or the like; R5, R6, R7 and R8 may be the same or different and respectively represent an alkyl group or the like; and a, b, c and d may be the same or different and respectively represent an integer of 0-3. When a plurality of R5's, R6's, R7's and R8's are present, they may be the same as or different from one another.Type: ApplicationFiled: February 1, 2008Publication date: April 15, 2010Applicant: Sumitomo Chemical Company, LimitedInventors: Tomoya Nakatani, Hidenobu Kakimoto
-
Patent number: 7691471Abstract: The present invention is directed to the use polycyclic diamines. These diamines, when polymerized with dianhydrides, and optionally other non-polycyclic diamines are used to form new polyamic acids. The polyamic acids can be imidized to form a new class of useful polyimide resins and polyimide films, particularly in electronics type applications.Type: GrantFiled: June 26, 2009Date of Patent: April 6, 2010Assignee: E. I. du Pont de Nemours and CompanyInventors: Jiang Ding, Christian Peter Lenges, Christopher Dennis Simone, Brian C. Auman
-
Publication number: 20100029895Abstract: There is provided a fluorine-containing diamine represented by formula (1). In this formula, R1 represents a condensed polycyclic type aromatic hydrocarbon group, and at least one —C(CF3)2OH group and at least one —NH2 group are in a relation such that they are attached to adjacent carbons of carbon atoms constituting the condensed polycyclic type aromatic hydrocarbon group. Polymer compounds derived from this fluorine-containing diamine have superior low dielectric property and low water-absorbing property, and, in addition to that, shows low thermal expansion property and high glass transition temperature.Type: ApplicationFiled: November 13, 2007Publication date: February 4, 2010Applicant: Central Glass Company, LimitedInventors: Satoru Narizuka, Yuji Hagiwara, Kazuhiro Yamanaka
-
Patent number: 7572878Abstract: The present invention is directed to the use polycyclic diamines. These diamines, when polymerized with dianhydrides, and optionally other non-polycyclic diamines are used to form new polyamic acids. The polyamic acids can be imidized to form a new class of useful polyimide resins and polyimide films, particularly in electronics type applications.Type: GrantFiled: September 16, 2005Date of Patent: August 11, 2009Assignee: E. I. Du Pont de Nemours and CompanyInventors: Jiang Ding, Christian Peter Lenges, Christopher Dennis Simone, Brian C. Auman
-
Patent number: 7060783Abstract: The present invention provides a diamine compound polymer and a method for producing the diamine compound polymer. The diamine compound polymer of the present invention has a condensed aromatic group represented by the following formulae (1-1) and (1-2). A represents a structure represented by the following formula (II-1). Y and Z represent divalent hydrocarbon groups. B and B? each independently represents a group represented by —O—(Y—O)m-H or —O—(Y—O)m-CO-Z-CO—OR?, wherein R? is a hydrogen atom, an aralkyl group, an aryl group, or an aralkyl group. m represents an integer from 1 to 5; and p represents an integer from 5 to 5000. Ar represents a monovalent aromatic group. X represents a divalent condensed aromatic group. T represents a divalent linear hydrocarbon group having 1 to 6 carbon atoms or a divalent branched hydrocarbon group having 2 to 10 carbon atoms. k and n each represents an integer of 0 or 1.Type: GrantFiled: February 20, 2004Date of Patent: June 13, 2006Assignee: Fuji Xerox Co., Ltd.Inventors: Mieko Seki, Hirohito Yoneyama, Daisuke Okuda, Hidekazu Hirose, Tadayoshi Ozaki, Takeshi Agata, Toru Ishii, Hiroaki Moriyama, Kiyokazu Mashimo, Katsuhiro Sato
-
Patent number: 7045241Abstract: A monomer to produce polybenzimidazole is dissolved in polyphosphoric acid. For example, polysulfated phenylene sulfonic acid (acidic group-possessing polymer) is further dissolved in this solution. In this procedure, the acidic group-possessing polymer and the monomer are adsorbed to one another in accordance with the acid-base interaction. When the monomer is polymerized, for example, by means of dehydration polymerization in this state, then polybenzimidazole is synthesized, and the polybenzimidazole and the acidic group-possessing polymer are compatibilized with each other to produce a compatibilized polymer. When the compatibilized polymer is deposited as a solid, and the solid is separated from polyphosphoric acid, then the compatibilized polymer is obtained. A proton conductive solid polymer electrolyte as a final product is manufactured by forming the compatibilized polymer to have a predetermined shape.Type: GrantFiled: July 18, 2003Date of Patent: May 16, 2006Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Hiroshi Akita, Teruaki Komiya
-
Patent number: 6979719Abstract: The invention pertains to a coating composition comprising a compound comprising at least one bicyclo-orthoester group and at least one other functional group. The invention also comprises a process for curing the present coating composition. Further, a process for making a bicyclo-orthoester-functional compound from the corresponding oxetane compound is described.Type: GrantFiled: February 22, 2000Date of Patent: December 27, 2005Assignee: Akzo Nobel N.V.Inventors: Klaus Hobel, Huig Klinkenberg, Arie Noomen
-
Patent number: 6936682Abstract: A polyamide characterized in that the polyamide is obtained by thermal polycondensation of (a) dicarboxylic acid components comprising 10 to 80% by mole in total carboxylic acid components of 1,4-cyclohexanedicarboxylic acid having a trans/cis molar ratio of 50/50 to 97/3 and (b) an aliphatic diamine component is disclosed. The alicyclic polyamide having 1,4-cyclohexanedicarboxylic acid in a backbone thereof as a dicarboxylic acid unit, which is suitable as materials for various uses such as automotive parts, electric/electronics parts, industrial materials, engineering materials and daily household goods, and superior in heat resistance, low water absorption, light resistance, moldability and light weight, as well as superior in toughness, chemical resistance and appearance, and molded articles thereof.Type: GrantFiled: December 6, 2001Date of Patent: August 30, 2005Assignee: Asahi Kasei Kabushiki KaishaInventors: Masaaki Aramaki, Tomofumi Maekawa
-
Patent number: 6858700Abstract: Higher diamondoid derivatives capable of taking part in polymerization reactions are disclosed as well as intermediates to these derivatives, polymers formed from these derivatives and methods for preparing the polymers.Type: GrantFiled: January 16, 2002Date of Patent: February 22, 2005Assignee: Chervon U.S.A. Inc.Inventors: Jeremy E. Dahl, Robert M. Carlson, Shenggao Liu
-
Patent number: 6824949Abstract: There are disclosed polybenzoxazole precursors which can be processed by centrifugal techniques, which can be cyclized to polybenzoxazoles on substrates without difficulty, and which after cyclization to polybenzoxazoles exhibit a high temperature stability. In particular, these precursors and the polybenzoxazoles prepared from them possess high resistance against the diffusion of metals.Type: GrantFiled: November 13, 2001Date of Patent: November 30, 2004Assignee: Infineon Technologies AGInventors: Jörg Haussmann, Gerhard Maier, Günter Schmid, Recai Sezi
-
Patent number: 6423304Abstract: Blooming and/or syneresis in gel formulations can be reduced or eliminated by adding to an organic mixture an effective amount of a polyamide gelling agent having a softening point of less than about 105° C. wherein the polyamide is the reaction product of one or more diamines, optionally one or more mono-amines, one or more hydrogenated C36 dimer acids, optionally one or more C2-22 dicarboxylic acids, and optionally one or more C2-22 monocarboxylic acids.Type: GrantFiled: June 13, 2001Date of Patent: July 23, 2002Assignee: Cognis CorporationInventors: Shailesh Shah, Sobhy El-Hefnawi, Douglas C. Rhubright
-
Publication number: 20020095013Abstract: A method of production of a homopolymer or copolymer or homo-oligomer or co-oligomer product characterised in that the product is obtained by condensation reaction of a diaminoanthracene, substituted or not, optionally with a diiminoanthracene substituted or not in the absence of anthraquinone substituted or not.Type: ApplicationFiled: November 26, 2001Publication date: July 18, 2002Applicant: Nissan Chemical Industries LimitedInventors: Poopathy Kathirgamanathan, Subramaniam Ganeshamurugan
-
Patent number: 6414103Abstract: A coating powder comprising a macrocyclic oligomer and a ring-opening polymerization agent is applied to an article, fused, and converted to a linear polymer at a temperature of from about 160 to about 400° C. The powder has the low melt viscosity and friability of a thermoset powder but is converted at high fusing temperatures to a tough coating having the good impact resistance and good elongation of a thermoplastic powder. The oligomer is a polyester, polycarbonate, polyamide, polyimide, polyamideimide. The article may be coated electrostatically or in a fluidized bed.Type: GrantFiled: September 28, 2000Date of Patent: July 2, 2002Assignee: Rohm and Haas CompanyInventors: Glenn D. Correll, Tina L. Tullos, Gordon L. Tullos
-
Patent number: 6392009Abstract: Benzobisazole polymers having repeating units of the formula wherein Z is wherein X is —S—, —O— or —NH—.Type: GrantFiled: February 13, 2001Date of Patent: May 21, 2002Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Fred E. Arnold, Thuy D. Dang, Narayanan Venkatasubramanian
-
Patent number: 6353083Abstract: This invention relates to: (a) fluorene copolymers comprising at least 10% (by residual monomeric units) of 9-substituted and/or 9,9-disubstituted fluorene moieties and at least two other monomeric units containing delocalized p-electrons, (b) polymer blends comprising at least 10 weight % of a copolymer specified in (a), and (c) electronic devices (such as polymer light emitting diodes) containing one or more films derived from these copolymers.Type: GrantFiled: April 9, 1999Date of Patent: March 5, 2002Assignee: The Dow Chemical CompanyInventors: Michael Inbasekaran, Weishi Wu, Edmund P. Woo, Mark T. Bernius
-
Publication number: 20010031853Abstract: The present invention provides PMR-type polyimides that exhibit lower melt viscosities than PMR-type polyimides of the prior art. These PMR-type polyimides are created by incorporating flexible linkages, such as kinked structures and twisted or non-coplanar moietes into the backbone structure of the PMR. Specifically, the present invention provides for the production of PMR-type polyimides having 2,2′-disubstituted biaryls in the polymer backbone.Type: ApplicationFiled: March 2, 2001Publication date: October 18, 2001Inventors: Ronald K. Eby, Michael Meador, Christopher A. Gariepy
-
Patent number: 6150496Abstract: An inherently light- and heat-stabilized polyamide has at least one piperidine compound bonded to the backbone polymer chain and at least one 4-amino-2,2,6,6-tetramethylpiperidine compound bonded to the backbone polymer chain. The inherently light- and heat-stabilized polyamide may be used to form articles such as, for example, fibers, carpets, yarns, and textile fabrics.Type: GrantFiled: February 5, 1999Date of Patent: November 21, 2000Assignee: BASF CorporationInventors: Otto M. Ilg, Ulrike Breiner, Manfred Juluis
-
Patent number: 6111055Abstract: An ester-terminated dimer acid-based polyamide may be blended with a solvent to form a gel. The solvent may be flammable, and a wick may be added to the resulting gel so as to form a candle. Depending on the composition, the candle may be formed into a free standing pillar, or may be better suited to being placed in a container. The solvent may be mineral oil. A solid coating may be placed around the candle, for advantages including to enhance the mechanical stability of the gelled body, and to eliminate the tendency of a gel to have an oily feel and to accept noticeable fingerprints. The solvent which, in combination with the ester-terminated dimer acid-based polymer forms a gel, may be or include a fragrance material, an insecticide or an insect repellent. A wick may or may not be present in this gel, but in any event, the composition provides for the release of the fragrance, insecticide or insect-repellent.Type: GrantFiled: September 26, 1997Date of Patent: August 29, 2000Assignees: Union Camp Corporation, Bush Boake AllenInventors: Vivian Berger, Charles R. Frihart, Ronald L. Gordon, Jochen Heydel, Richard C. MacQueen, Mark S. Pavlin, Virgil Williams
-
Patent number: 5990270Abstract: A polyamide composition which is amorphous and transparent, which has reduced flammability, and which has reduced migration of flame-retardant additive so that it is film-free, includes at least one polyamide which contains cycloaliphatic monomer units and which is amorphous and transparent; and a flame-retardant additive which is present in an amount effective to reduced flammability of the polyamide composition, which is dissolved in the at least one polyamide, and which is at least one alkyl phosphonic acid compound having a general formula: ##STR1## wherein R and R' each represent, independent of each other, an alkyl group having from 1 to 4 carbon atoms, and x=0 or 1. An article molded from this composition is transparent, has reduced flammability, and has reduced migration of flame-retardant additive so that it is film-free.Type: GrantFiled: October 30, 1998Date of Patent: November 23, 1999Assignee: Ems- Inventa AGInventors: Hans Dalla Torre, Manfred Hewel
-
Patent number: 5891987Abstract: A copolyamide composition prepared from hexamethylene diamine and either mixtures of adipic acid and terephthalic acid, or mixtures of adipic acid, terephthalic acid and isophthalic acid, has a melting point below 320.degree. C., a glass transition temperature between 100.degree. C. and 120.degree. C. and physical properties similar to nylon 66.Type: GrantFiled: November 15, 1995Date of Patent: April 6, 1999Assignee: Industrial Technology Research InstituteInventors: Wu-Bin Yuo, Chien-Shiun Liao, Wen-Jeng Lin, Li-Kuei Lin, Tien-San Lee, Szu-Yuan Chan
-
Patent number: 5773558Abstract: Colorless, amorphous polyamide, or blends or alloys thereof, and the molded articles with high alternate bending strengths are made available; they are preferably made up of unbranched aliphatic diamines and cycloaliphatic dicarboxylic acids, and have high strength, high rigidity, high heat distortion, and good solvent resistance.Type: GrantFiled: September 24, 1997Date of Patent: June 30, 1998Assignee: EMS-Inventa AGInventor: Hans Dalla Torre
-
Patent number: 5688895Abstract: Disclosed herein are thermotropic liquid crystalline poly(ester-amides) containing repeat units derived from alipatic diamines and other monomers, such as aromatic diols, aromatic dicarboxylic acids, aromatic hydroxycarboxylic acids, and optionally aliphatic diols. The polymers are particularly useful as films and in multilayer structures as barrier layers because of their relatively low permeability to various compounds.Type: GrantFiled: June 24, 1996Date of Patent: November 18, 1997Assignee: E. I. Du Pont de Nemours and CompanyInventors: Irene Greenwald Plotzker, Joel David Citron, Marion Glen Waggoner
-
Patent number: 5670603Abstract: This invention relates to polymers having non-linear optical properties which polymers include fluorene moieties having at least one electron accepting group and at least one electon donating group substituted to different phenyl rings of the fluorene moiety.Type: GrantFiled: March 8, 1993Date of Patent: September 23, 1997Assignee: AlliedSignal Inc.Inventors: Chengjiu Wu, Jianhui Shan, Ajay Nahata
-
Patent number: 5646234Abstract: 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: GrantFiled: April 4, 1995Date of Patent: July 8, 1997Assignee: Hoechst AGInventors: Holger Jung, Richard Neuert, Peter Klein, Georg-Emerich Miess
-
Patent number: 5604292Abstract: Novel conjugated amino substituted phenylene polymers are disclosed having on-linear optical properties, and which can be converted to electrically conductive polymers. Such polymers are produced by reacting a novel bis-cycloalkylene sulfonium salt of 2,5,N,N-tetramethylaniline hydrochloride, such as 2,5-(N,N-dimethyl)aniline hydrochloride dimethylene bis-(tetramethylene sulfonium chloride) with alkali metal hydroxide to form a cycloalkylene sulfonium salt precursor polymer, and then heating the precursor polymer under conditions to produce the amino substituted phenylene vinylene polymer, such as poly(2-(N,N-dimethylamino) phenylene vinylene). The polymers can also be made directly by treatment of the bis chlormethyl dimethyl aniline hydrochloride derivative with alkali metal alkoxide.Type: GrantFiled: May 31, 1994Date of Patent: February 18, 1997Assignee: The Untied States of America as represented by the Secretary of the NavyInventors: John D. Stenger-Smith, William P. Norris, Andrew P. Chafin, Scott T. Sackinger
-
Patent number: 5599623Abstract: An aramid composition consisting essentially of repeat units derived from p-phenylenediamine, terephthalic acid, 3,3'-bibenzoic acid, and optionally chloroterephthalic acid, is disclosed. The aramids are especially useful for fibers, which after drawing usually have enhanced tensile moduli and strengths, which makes them especially useful in ropes and cables, and in composites.Type: GrantFiled: January 16, 1996Date of Patent: February 4, 1997Assignee: E. I. Du Pont de Nemours and CompanyInventor: Beverly J. Selle
-
Patent number: 5587450Abstract: A process for producing an aromatic polyamide film, which comprises the steps of: (a) forming a thin layer of an optically isotropic dope in which an aromatic polyamide is dissolved in a polar amide, (b) immersing the thin layer dope of aromatic polyamide in a polar solvent, other than said polar amide, kept at a temperature not higher than -20.degree. C. to prepare a film, and (c) drying the film. The aromatic polyamide film thus obtained is excellent in transparency. Said process requires neither a step of dissolving an aromatic polyamide in conc. sulfuric acid nor an acid-resistant equipment, and hence, is inexpensive.Type: GrantFiled: June 30, 1995Date of Patent: December 24, 1996Assignee: Sumitomo Chemical Company, LimitedInventors: Kazunori Akiyoshi, Masahiro Niwano
-
Patent number: 5571891Abstract: 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: GrantFiled: April 5, 1995Date of Patent: November 5, 1996Assignee: Hoechst AktiengesellschaftInventors: Holger Jung, Richard Neuert, Peter Klein
-
Patent number: 5552508Abstract: Novel difunctionalized cyclobutabenzene monomers of the general formula: ##STR1## wherein Z can be hydrogens or a cyclobutane ring; and X and Y are carboxyl, amino, alcohol, isocyanate, acid halide, or bis-acyl halide groups. Exemplary difunctional bitricyclodecatriene monomers are [2,2'-bidicyclo[2.4.0]octa-1,3,5-triene]-5,5'-dicarboxylic acid (BXTA) and [2,2'-bitricyclo[6.2.0.0]deca-1,3,(6),7-triene]-7,7'-dicarboxylic acid (QXTA). The difunctionalized bitricyclodecatriene monomers can form part of a polymer backbone chain in which the multiple butane ring functionalities can be easily opened to produce strong, three-dimensional covalent bond crosslinking between polymer chains. The crosslinking can be induced simply by heating the polymer to a temperature in excess of 250.degree. C.Type: GrantFiled: May 23, 1995Date of Patent: September 3, 1996Assignee: University of Michigan, The Board of RegentsInventors: David C. Martin, Jeffrey S. Moore, Larry J. Mar koski, Kenneth A. Walker, Gary E. Spilman
-
Patent number: 5504184Abstract: Xanthene polyesters and polyamides are provided resulting from the reaction of alkylene, cycloaliphatic or aromatic diols or organo diamines with xanthene dicarboxylic esters or xanthene dicarboxylic acid halides. These amorphous, or crystalline film forming, high performance thermoplastics which are useful in automotive applications, and include copolymers and blends of such xanthene polymers.Type: GrantFiled: June 6, 1995Date of Patent: April 2, 1996Assignee: General Electric CompanyInventors: Andrew J. Caruso, Julia L. Lee
-
Patent number: 5498784Abstract: Alcohol-soluble aromatic heterocyclic copolymers having repeating units of the formula: ##STR1## wherein x has a value of 0.05 to 0.50 and y has a value of 1.0-x. These copolymers are useful in the preparation of organic/inorganic hybrid materials having transparency which comprise the sol-gel derived, hydrolytically condensed reaction product of a metal alkoxide of the formula M(OR).sub.w wherein R is a lower alkyl group, M is Si, Ti, Al or a mixture thereof, and w is the valence value of M, and the above copolymer.Type: GrantFiled: February 21, 1995Date of Patent: March 12, 1996Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Fred E. Arnold, Jom P. Chen
-
Patent number: 5492996Abstract: Alcohol-soluble aromatic heterocyclic polymers having repeating units of the formula: ##STR1## wherein X is --O-- or --S--, and R is selected from the group consisting of: ##STR2## and R' is selected from the group consisting of alkyl having 1 to 5 carbon atoms, alkaryl having 7 to 12 carbon atoms, aralkyl having 7 to 12 carbon atoms and substituted aromatic having 1 to 3 substituent groups.The alcohol-soluble polymers may be used for fabricating organic/inorganic hybrid composites with metal alkoxides M(OQ).sub.v, wherein M is Si, Ti, Al or the like and Q is a lower alkyl group. These polymers can also be used to coat materials or substrates which are susceptible to attack by highly corrosive acids. On drying, the ionic bond between the trialkylamine and the sulfo group is broken and the polymer reverts to the parent structure, thereby leaving a polymer coating. Yet further, the original amine can be exchanged with a less volatile amine or an amine having a desired functionality.Type: GrantFiled: February 21, 1995Date of Patent: February 20, 1996Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Thuy D. Dang, Jom P. Chen, Fred E. Arnold
-
Patent number: 5493005Abstract: Alcohol-soluble, aromatic heterocyclic copolymers having repeating units of the formula: ##STR1## wherein x has a value of 0.10 to 0.90 and y has a value of 1.0-x. These copolymers are useful in the preparation of organic/inorganic hybrid materials having transparency which comprise the sol-gel derived, hydrolytically condensed reaction product of a metal alkoxide of the formula M(OR).sub.w wherein R is a lower alkyl group, M is Si, Ti, Al or a mixture thereof, and w is the valence value of M, and the above copolymer.Type: GrantFiled: February 21, 1995Date of Patent: February 20, 1996Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Fred E. Arnold, Jom P. Chen
-
Patent number: 5432255Abstract: A process is described for preparing directly spinnable polymer solutions containing as fiber-forming substance polymers containing at least 95 mol %, based on the polymer, of the recurring structural unit of the formula I[--CO--R.sup.1 --CO--NH--R.sup.2 --NH--] (I)and up to 5 mol % of structural units as formed in the conversion/reaction of aromatic, aliphatic or cycloaliphatic dicarbonyl dichlorides and/or diamines. R.sup.1 and R.sup.2 are independently of each other 1,6-naphthylene, 1,7-naphthylene, 2,7-naphthylene, 3,4'-biphenyldiyl or 1,3-phenylene. The polymers prepared by reacting diamines of the formula (II) with dicarbonyl dichlorides of the formula (III) in solutionH.sub.2 N--R.sup.2 --NH.sub.2 (II)ClOC--R.sup.1 --COCl (III)The process contains the steps ofa) presenting the diamines as initial charge in the form of a solution in N-methylpyrrolidone,b) adding the dicarbonyl dichlorides to this solution,c) using starting monomers having a purity of greater than 99.Type: GrantFiled: April 28, 1993Date of Patent: July 11, 1995Assignee: Hoechst AGInventors: Holger Jung, Peter Klein, Uwe Kampschulte
-
Patent number: 5418312Abstract: Novel difucntionalized cyclobutabenzene monomers of the general formula: ##STR1## wherein Z can be hydrogens or a cyclobutane ring; and X and Y are carboxyl, amino, alcohol, isocyanate, acid halide, or bis-acyl fluoride groups. In a particularly preferred embodiment, the cyclobutabenzene derivative is 1,2-dihydrocyclobutabenzene-3,6-carboxylic acid. The difunctionalized cyclobutabenzene monomer can form part of a polymer backbone chain, but has an additional functionality, the butane ring, which can be easily opened to produce strong, covalent bond crosslinking between polymer chains. The crosslinking can be induced simply by heating the polymer to a temperature in excess of 300.degree. C.Type: GrantFiled: August 1, 1994Date of Patent: May 23, 1995Assignee: The Board of Regents of the University of MichiganInventors: David C. Martin, Jeffrey S. Moore, Larry J. Markoski, Kenneth A. Walker
-
Patent number: 5362846Abstract: Copolyamides having high crystallinity over the whole composition range, a melting enthalpy .DELTA.H>3.5 cal/g and a melting point T.sub.M higher than 270.degree. C. and articles manufactured therefrom are disclosed, said copolyamides comprising, by moles:a) 1 to 99% of a unit A of formula--(NH--R--NHCO--AR.sub.1 --CO)--in which R is a --(CH.sub.2).sub.n --carbon chain where n is coma) between 4 and 20, and AR.sub.1 is the residue from the condensation of terephthalic acid and/or of the diester form thereof; andb) 99 to 1% of a unit B of formula--(NH--R--NHCO--AR.sub.2 --CO)--in which R is the same carbon chain as in unit A and AR.sub.2 is the residue from condensation of naphthalene-2,6-dicarboxylic acid and/or the diester form thereof.Type: GrantFiled: June 11, 1993Date of Patent: November 8, 1994Assignee: Elf Atochem S.A.Inventor: Jean-Marc Sage
-
Patent number: 5334693Abstract: Aramids having repeat units derived from p-phenylenediamine, 4,4'-bis(3-aminophenoxy)biphenyl and terephthalic acid. These aramids have good strength properties, particularly after drawing, and good high temperature properties. The aramids are useful for fibers and films.Type: GrantFiled: May 21, 1993Date of Patent: August 2, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventor: Robert S. Irwin
-
Patent number: 5331081Abstract: 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: GrantFiled: April 21, 1992Date of Patent: July 19, 1994Assignee: Hoechst AktiengesellschaftInventors: Hans-Rolf Dubal, Mikio Murakami, Otto Herrmann-Schonherr, Arnold Schneller