Carboxylic Acid Or Derivative Is A Reactant Patents (Class 528/173)
-
Patent number: 5502156Abstract: Disclosed is a thermally-stable SnO.sub.2 -surfaced polyimide film wherein the electrical conductivity of the SnO.sub.2 surface is within the range of about 3.0.times.10.sup.-3 to about 1.times.10.sup.-2 ohms.sup.-1,. Also disclosed is a method of preparing this film from a solution containing a polyamic acid and SnCl.sub.4 (DMSO).sub.2.Type: GrantFiled: July 28, 1994Date of Patent: March 26, 1996Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Anne K. St. Clair, Stephen A. Ezzell, Larry T. Taylor, Harold G. Boston
-
Patent number: 5502157Abstract: A copolyimide was prepared by reacting 3,4'-oxydianiline (3,4'-ODA) with a dianhydride blend comprising, based on the total amount of the dianhydride blend, about 67 to 80 mole percent of 4,4'-oxydiphthalic anhydride (ODPA) and about 20 to 33 mole percent of 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA). The copolyimide may be endcapped with up to about 10 mole percent of a monofunctional aromatic anhydride and has unbalanced stoichiometry such that a molar deficit in the dianhydride blend is compensated with twice the molar amount of the monofunctional aromatic anhydride. The copolyimide was used to prepare composites, films and adhesives. The film and adhesive properties were significantly better than those of LaRC.TM.-IA.Type: GrantFiled: August 31, 1994Date of Patent: March 26, 1996Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Alice C. Chang, Terry L. St. Clair
-
Patent number: 5500479Abstract: A block copolymer resin containing structural units conforming to ##STR1## and a method for its preparation are disclosed. Accordingly, the block copolymer is prepared by reactive blending of an ester-containing polyether sulfone with a polyester. The block copolymer resin thus produced is characterized by its homogeneous morphology. The high level of its mechanical properties makes the resin suitable for a variety of applications.Type: GrantFiled: September 23, 1994Date of Patent: March 19, 1996Assignees: Bayer Corporation, Bayer AktiengesellschaftInventors: Aaron D. Meltzer, Alexander Karbach
-
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: 5498691Abstract: Disclosed are bis-meta-benzotrifluoride compounds having the general formula ##STR1## where each A is independently selected from the group consisting of NO.sub.2, NH.sub.2, and NH.sub.3.sup.+ Z.sup.-, Z.sup.- is an anion and B is selected from the group consisting of O, CO, S, SO, and SO.sub.2. The diamine compounds are useful as monomers in making polyimides, polyamide-imides, and polyamides.Type: GrantFiled: October 9, 1990Date of Patent: March 12, 1996Assignee: Occidental Chemical CorporationInventors: Jeffrey S. Stults, Henry C. Lin, Robert A. Buchanan, Robert L. Ostrozynski
-
Patent number: 5496915Abstract: Polyimides are obtainable by reacting a dianhydride component with a diamine component, at least one diamine containing cycloaliphatic units, with the proviso that the dianhydride component is a mixture of different dianhydrides if the diamine component consists only of one diamine containing cycloaliphatic units and the diamine component is a mixture of different diamines if the dianhydride component consists of only one dianhydride.Type: GrantFiled: February 13, 1995Date of Patent: March 5, 1996Assignee: BASF AktiengesellschaftInventors: Christian Fischer, Karin Elbl-Weiser, Ju/ rgen Koch
-
Patent number: 5494991Abstract: Polyimides comprising recurring units of the following general formula (1) ##STR1## wherein Ar.sub.1 represents a tetravalent aromatic group and each Ar.sub.2 represents a divalent aromatic group. Polyimide copolymers and preparations of the polyimides and the polyimide copolymers are also described.Type: GrantFiled: June 17, 1994Date of Patent: February 27, 1996Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Ichiro Kaneko, Atushi Sugitani, Masahiro Yuyama, Kiyoshi Motomi
-
Patent number: 5493003Abstract: Solutions of polyimide-forming substances containA) polyamines andB) amides and/or esters of tetracarboxylic acids, the amido or ester groups carrying substituents selected from the group consisting of carboxyl, sulfo and silicon-containing groups,and are used as polyimide coatings.Type: GrantFiled: October 11, 1994Date of Patent: February 20, 1996Assignee: BASF Lacke + Farben AktiengesellschaftInventors: Rainer Blum, Manfred Schwarz, Gerhard Hoffmann
-
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: 5489644Abstract: Solutions of polyimide-forming substances containA) aromatic or partly aromatic diamines andB) tetraesters of imide-forming aromatic or partly aromatic tetracarboxylic acids or mixtures of these tetraesters with the corresponding tri-, di- and/or monoesters.These solutions are suitable for the production of coatings.Type: GrantFiled: March 31, 1994Date of Patent: February 6, 1996Assignee: BASF Lacke + FarbenInventors: Rainer Blum, Gerhard Hoffmann
-
Patent number: 5484880Abstract: The present invention relates to an amorphous polyimide or a polyimide copolymer having a requisite structural unit consisting of one or more recurring structural units represented by the formula (1): ##STR1## wherein X is a direct bond, oxygen atom or sulfur atom, and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are individually a hydrogen atom or methyl, and Ar is a tetravalent radical having 6 to 27 carbon atoms and being selected from the group consisting of a monoaromatic radical, condensed polyaromatic radical and noncondensed polyaromatic radical having aromatic radicals connected to each other with a direct bond or a bridge member.Polyimide and the polyimide copolymer of the invention has excellent heat resistance, is outstanding in melt-flow stability, has greatly improved processability, and can be applied to structural materials, and electric- electronic appliances.Type: GrantFiled: December 13, 1994Date of Patent: January 16, 1996Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Wataru Yamashita, Yuichi Okawa, Shoji Tamai, Mitsunori Matsuo, Tsutomu Ishida, Keizaburo Yamaguchi, Akihiro Yamaguchi
-
Patent number: 5484879Abstract: Polyimide polymers of the following recurring structure and the corresponding polyamic acids are disclosed: ##STR1## wherein AR.sub.1 is ##STR2## where X is O, S, SO, SO.sub.2, CO, C(CF.sub.3).sub.2, C(CH.sub.3).sub.2, Si(CH.sub.3).sub.2, or a single bond, wherein AR.sub.2 may be pyromellitic dianhydride, a substituted pyromellitic dianhydride, naphthanoic dianhydride, or ##STR3## where Y is O, S, SO, SO.sub.2, CO, C(CF.sub.3).sub.2, C(CH.sub.3).sub.2, Si(CH.sub.3).sub.2 --O--AR--O--, or a single bond, where AR is an aromatic nucleus.Type: GrantFiled: December 17, 1990Date of Patent: January 16, 1996Assignee: Occidental Chemical CorporationInventors: Robert A. Buchanan, Jeffrey S. Stults, Ronald F. Spohn
-
Patent number: 5480964Abstract: A negative birefringent film, useful in liquid crystal displays, and a method for controlling the negative birefringence of a polyimide film is disclosed which allows the matching of an application to a targeted amount of birefringence by controlling the degree of in-plane orientation of the polyimide by the selection of functional groups within both the diamine and dianhydride segments of the polyimide which affect the polyimide backbone chain rigidity, linearity, and symmetry. The higher the rigidity, linearity and symmetry of the polyimide backbone, the larger the value of the negative birefringence of the polyimide film.Type: GrantFiled: April 21, 1994Date of Patent: January 2, 1996Assignee: The University of AkronInventors: Frank W. Harris, Stephen Z. D. Cheng
-
Patent number: 5480965Abstract: This invention relates to a novel thermoplastic and amorphous polyimide which is readily soluble in organic solvent, a novel aromatic diamino compound used for the polyimide, a preparation process thereof, a polyimide-based resin composition comprising the thermoplastic polyimide and a fibrous reinforcement, a process for preparing the resin composition, an injection molded article of the resin composition, a polyimide-based composite obtained by molding the above soluble and thermoplastic polyimide in combination with a fibrous reinforcement, and a fibrous reinforcement having a surface modified with the above polyimide.Type: GrantFiled: July 26, 1994Date of Patent: January 2, 1996Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Wataru Yamashita, Yuichi Okawa, Hideaki Oikawa, Tadashi Asanuma, Yuko Ishihara, Mitsunori Matsuo, Keizaburo Yamaguchi, Akihiro Yamaguchi, Shoji Tamai
-
Patent number: 5478915Abstract: Polyimide oligomers are described which comprise the condensation product of: at least one phenylindane diamine and at least one aromatic bis(ether anhydride). The polyimide oligomers of the invention are readily processed to form solution prepregable polyimide composites having high glass transition temperatures and high temperature and oxidative stability. More particularly, the present invention provides for crosslinkable polyimide oligomers prepared by reacting, in a suitable solvent under an inert atmosphere, a mixture of monomers comprising: (A) an aromatic diamine component comprising from about 25 to 100 mole % of at least one phenylindane diamine; (B) a dianhydride component comprising from about 25 to 100 mole % of at least one aromatic his(ether anhydride); and (C) at least one end-cap monomer selected from the group consisting of monoanhydrides, acyl halides and aromatic amines, wherein each end-cap monomer contains at least one crosslinkable functional group in the molecule.Type: GrantFiled: December 30, 1993Date of Patent: December 26, 1995Assignee: Ciba-Geigy CorporationInventors: Michael Amone, Mark R. Southcott
-
Patent number: 5478914Abstract: Polyimides comprising recurring units of the following general formula (1) ##STR1## wherein R.sub.1 represents a tetravalent aromatic group. Polyimide copolymers and preparations of the polyimides and the polyimide copolymers are also described.Type: GrantFiled: July 1, 1994Date of Patent: December 26, 1995Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Ichiro Kaneko, Atushi Sugitani, Masahiro Yuyama, Kiyoshi Motomi
-
Patent number: 5478913Abstract: Copolyimides from 1,4-bis(4-aminophenoxy)-2-phenylbenzene and m- or p-phenylene diamine with biphenyl dianhydride exhibit a high Tg and reduced melt viscosity.Type: GrantFiled: August 31, 1994Date of Patent: December 26, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventors: Richard J. Boyce, Thomas P. Gannett, James M. Sonnett, Murty S. Tanikella, Brian C. Auman
-
Patent number: 5478918Abstract: A polyimide precursor composition solution includes a tetracarboxylic acid component containing not less than 70 mol % of at least one selected from the group consisting of benzenetetracarboxylic acid and its reactive derivatives; a maleimide compound; and a diamine component containing not less than 70 mol % of 2,2'-substituted-4,4'-benzidine represented by the general formula (I) and siloxydiamine amounting to from 1 to 10 mol %. The tetracarboxylic acid component, the maleimide compound and the diamine component are dissolved in a solvent which is consisting essentially of .gamma.-butyrolactone. The amount of the tetracarboxylic acid component is substantially equivalent to that of the diamine component. The amount of the maleimide compound is from 5 to 30 wt % of the total weight of the tetracarboxylic acid and the diamine component.Type: GrantFiled: February 1, 1994Date of Patent: December 26, 1995Assignee: Central Glass Company, LimitedInventors: Masamichi Maruta, Hidehisa Nanai, Yoshihiro Moroi, Hiroshi Takahashi, Seiji Hasegawa
-
Patent number: 5478917Abstract: Solutions of polyimide-forming substances containA) aromatic or partly aromatic polyamines andB) amides or a mixture of esters and amides of tetracarboxylic acids.Solutions are useful as coating compositions.Type: GrantFiled: October 11, 1994Date of Patent: December 26, 1995Assignee: BASF Lacke + Farben AktiengesellschaftInventors: Rainer Blum, Gerhard Hoffmann
-
Patent number: 5478916Abstract: A solvent resistant copolyimide was prepared by reacting 4,4'-oxydiphthalic anhydride with a diaimine blend comprising, based on the total amount of the diamine blend, about 75 to 90 mole percent of 3,4'-oxydianiline and about 10 to 25 mole percent p-phenylene diamine. The solvent resistant copolyimide had a higher glass transition temperature when cured at 350.degree. , 371.degree. and 400.degree. C. than LaRC.TM.-IA. The composite prepared from the copolyimide had similar mechanical properties to LaRC.TM.-IA. Films prepared from the copolyimide were resistant to immediate breakage when exposed to solvents such as dimethylacetamide and chloroform. The adhesive properties of the copolyimide were maintained even after testing at 23.degree., 150.degree., 177.degree. and 204.degree. C.Type: GrantFiled: September 1, 1994Date of Patent: December 26, 1995Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Alice C. Chang, Terry L. St. Clair
-
Patent number: 5473010Abstract: The present invention relates to a polyimide based resin composition comprises 1 to 50 parts by weight of polyetherimide for 100 parts by weight a resin composition comprising 50 to 99 parts by weight of polyarylether ketone and 50 to 1 parts by weight of polyimide having specific structural units.The polyimide based resin compositions have excellent fatigue characteristics and creep resistance and are expected widely to apply in field of machine and automobile parts which is required permanence for mechanical strength.Type: GrantFiled: August 30, 1994Date of Patent: December 5, 1995Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Atsushi Morita, Tomohito Koba, Toshiaki Takahashi, Katsunori Shimamura, Toshiyuki Kataoka, Hiroyuki Furukawa, Hiroaki Tomimoto
-
Patent number: 5472823Abstract: A photosensitive resin composition comprising, as its main ingredient, a poly(amic acid) resin constituted of a diamino compound represented by formula: ##STR1## and optionally used other diamino compound and a tetracarboxylic acid dianhydride as its constituent monomers and/or a poly(amic acid) ester resin obtained by esterifying said poly(amic acid) resin and/or a polyimide resin obtained by a dehydrating or alcohol-eliminating ring-closure reaction of said poly(amic acid) resin or poly(amic acid) ester resin has an excellent developability and a high film strength and can form a relief patter of low thermal expansion.Type: GrantFiled: January 15, 1993Date of Patent: December 5, 1995Assignee: Hitachi Chemical Co., Ltd.Inventors: Hideo Hagiwara, Makoto Kaji, Hiroshi Nishizawa, Kenji Suzuki, Yasunori Kojima
-
Patent number: 5470943Abstract: This invention relates to a novel fluorine-containing polyimide or polyimide copolymer being colorless and having transparency and very low dielectric characteristics, and has a novel aromatic diamino compound used for the polyimide, a preparation process thereof, a polyimide-based resin composition comprising the polyimide or polyimide copolymer and a fibrous reinforcement, a process for preparing the resin composition, an injection molded article of the resin composition.Type: GrantFiled: December 21, 1994Date of Patent: November 28, 1995Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Yoshihiro Sakata, Wataru Yamashita, Yuichi Okawa, Shoji Tamai, Tsutomu Ishida, Mitsunori Matsuo, Keizaburo Yamaguchi, Akihiro Yamaguchi
-
Patent number: 5464928Abstract: The invention is a direct process for preparing semi-crystalline polyimides. This process comprises the steps of: providing a polar aprotic solvent, adding a dianhydride and a diamine to the solvent to form a mixture, stirring the mixture at ambient temperature, and adding glacial acetic acid to the mixture to provide a ratio of polar aprotic solvent to glacial acetic acid which ranges from about 90 to 10 to about 75 to 25 by volume to form a solution. The solution was heated to a range from about 110.degree. C. to about 140.degree. C. to form a polyimide precipitate. The polyimide precipitate was recovered as a semi-crystalline polyimide powder.Type: GrantFiled: September 1, 1994Date of Patent: November 7, 1995Assignee: The United States of America as represented by the United States National Aeronautics and Space AdministrationInventors: Alice C. Chang, Terry L. St. Clair
-
Patent number: 5464927Abstract: Copolyamic acid is obtained from tetracarboxylic acid dianhydride, diamine and a fluorinated diamine and/or fluorinated tetracarboxylic acid dianhydride; and optionally ester or amine salt derivative thereof to obtain radiation sensitive polymer; and low optical high thermally stable polyimide from curing the above polyamic acid and/or derivative thereof.Type: GrantFiled: May 10, 1993Date of Patent: November 7, 1995Assignee: International Business Machines CorporationInventors: Marie Angelopoulos, Jeffrey D. Gelorme, Jeffrey W. Labadie, David A. Lewis, Sally A. Swanson, Nancy C. Labianca
-
Patent number: 5464923Abstract: The present invention provides novel substituted biphenyl pyrazines or pyrazine derivatives ("BPD") which are functional and have useful application as a monomer for a variety of high performance polymers such as polyester, polyarylate, polycarbonate, polyetherketones, epoxides, polyimides, polyamides, and polyamides-imides; and as pigments for coating compositions such as paints. These BPD have the general formula: ##STR1## wherein R.sub.1 -R.sub.8 and n are defined herein.Type: GrantFiled: October 19, 1994Date of Patent: November 7, 1995Assignee: Hoechst Celanese CorporationInventors: Richard Vicari, George Kvakovszky, Olan S. Fruchey
-
Patent number: 5464925Abstract: The present invention is an oligomer represented by the formula: ##STR1## wherein X is a moiety selected from the group consisting of: ##STR2## where each Y is independently S, O, CH.sub.2, C.dbd.O, CH.sub.3 --C--CH.sub.3, O.dbd.S.dbd.O, or CF.sub.3 --C--CF.sub.3.In another aspect, the present invention is a polymer of the above-described oligomer.Type: GrantFiled: May 25, 1994Date of Patent: November 7, 1995Assignee: The Dow Chemical CompanyInventors: Eric S. Moyer, Denise J. D. Moyer
-
Patent number: 5463016Abstract: This invention provides (1) a granular material of a polyimide precursor, which has excellent solubility in solvents and excellent moldability and from which a polyimide molding having excellent mechanical properties can be produced, (2) a mixture of a granular material of a polyimide precursor with a solvent, in which the polyimide precursor shows excellent storage stability and (3) a process for the production of a granular material of a polyimide precursor, in which a solvent can be easily removed. Particularly provided are a polyimide precursor granular material having an intrinsic viscosity of 0.7 or higher and a polyimide precursor mixture which consists of a polyimide precursor granular polyimide having an intrinsic viscosity of 0.7 or higher and a solvent that does not exhibit a strong-mutual interaction with the polyimide precursor, as well as a process for the production of the polyimide precursor granular material.Type: GrantFiled: February 9, 1994Date of Patent: October 31, 1995Assignee: Unitika Ltd.Inventors: Isao Tomioka, Takeshi Nakano, Mikio Furukawa, Yoshiaki Echigo
-
Patent number: 5459232Abstract: 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: GrantFiled: July 9, 1993Date of Patent: October 17, 1995Assignee: Fujitsu LimitedInventors: Wataru Sotoyama, Satoshi Tatsuura, Tetsuzo Yoshimura, Azuma Matsuura, Tomoaki Hayano
-
Patent number: 5459233Abstract: In one aspect, the present invention relates to polyimides having excellent thermal resistance and process for preparing the same comprising carrying out condensation of 4,4'-bis(3-aminophenoxy)biphenyl with pyromellitic dianhydride in the presence of a different diamine compound and optionally with a different tetracarboxylic acid dianhydride.In a second aspect, the present invention relates to a heat resistant resin composition consisting essentially of an aromatic polyetherimide and a defined polyimide.In a third aspect, the present invention relates to a polyimide resin composition comprised on a defined polyimide and a separate high-temperature engineering polymer.In a fourth aspect, the present invention relates to a resin composition comprised of a defined polyimide and an aromatic polyamideimide.Type: GrantFiled: December 7, 1993Date of Patent: October 17, 1995Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Shoji Tamai, Masahiro Ohta, Saburo Kawashima, Katsuaki Iiyama, Hideaki Oikawa, Akihiro Yamaguchi
-
Patent number: 5457154Abstract: A moldable polyimide resin composition which has melt-flowability and excellent processability in addition to essential heat-resistant of polyimide and comprises an aromatic bisimide compound and polyimide resin. A further aspect relates to a carbon fiber reinforced polyimide resin composition which has excellent mechanical strengths and comprises a carbon fiber coated with aromatic bisimide compound on the surface and the polyimide resin. A still further aspect relates to a novel bisimide compound which is very useful as the aromatic bisimide compound in the composition.Type: GrantFiled: November 9, 1992Date of Patent: October 10, 1995Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Masahiro Ohta, Akio Matsuyama, Eiji Senoue, Fumiaki Kuwano, Osamu Yasui, Yasunori Yoshida, Akinori Ryu, Tadashi Kobayashi
-
Patent number: 5455327Abstract: Two monomers containing meta-biphenylenedioxy moieties were prepared. One monomer, a diamine, is used to prepare polyimide, polyamide, and epoxy polymers. The other monomer, a dianhydride, was used to prepare polyimide polymers. These polymers are used to make films, coatings, and selective membranes.Type: GrantFiled: December 16, 1993Date of Patent: October 3, 1995Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Terry L. St. Clair, J. Richard Pratt
-
Patent number: 5453484Abstract: A diamine compound of the general formula ##STR1## wherein the arrows denote isomerism, R.sub.1 is a divalent aromatic group selected from the group consisting of ##STR2## R.sub.2 is a tetravalent aromatic group selected from the group consisting of ##STR3## and R.sub.4 is a monovalent aliphatic group selected from the group consisting of ethyl and isopropyl; and, a process for preparing same.Type: GrantFiled: June 30, 1994Date of Patent: September 26, 1995Assignee: Korea Research Institute of Chemical TechnologyInventors: Suh Bong Rhee, Ji Young Chang, Bong Seok Moon, Ji-Woong Park
-
Patent number: 5449741Abstract: A polyimide optical material, composed of a perfluorinated polyimide having a perfluorinated repeating unit represented by general formula (1) ##STR1## wherein R.sub.1 is a tetravalent perfluorinated organic group; and R.sub.2 is a divalent perfluorinated organic group.Type: GrantFiled: October 25, 1993Date of Patent: September 12, 1995Assignee: Nippon Telegraph and Telephone CorporationInventors: Shinji Ando, Toru Matsuura, Shigekuni Sasaki, Fumio Yamamoto
-
Patent number: 5449742Abstract: Polyimide optical waveguide structures comprising a core within a cladding wherein at least one of the core and the cladding is a polyimide containing 6FDA, BTDA, an aromatic diamine having bulky methyl groups ortho to the amine, and a co-diamine wherein the polyimides have the properties of low optical loss, low optical absorbance, controllable refractive index, and high thermal stability, and wherein the polyimides are photosensitive and solvent resistant.Type: GrantFiled: February 15, 1994Date of Patent: September 12, 1995Assignee: Amoco CorporationInventors: Allyson J. Beuhler, David A. Wargowski
-
Patent number: 5446120Abstract: Polysulfone and polyethersulfone oligomers made by the condensation of crosslinking end caps, monomers, diols, and dihalogen moieties exhibit improved solvent resistance which is necessary for their use in aerospace applications. Blends of the oligomers and corresponding polymers formed from the diols and dihalogen moieties, but without end caps, exhibit superior impact resistance when cured. The present invention describes improved prepregs and composites made from these oligomers.Type: GrantFiled: January 3, 1990Date of Patent: August 29, 1995Assignee: The Boeing CompanyInventors: Hyman R. Lubowitz, Clyde H. Sheppard
-
Patent number: 5443783Abstract: Disclosed is a process for blow molding articles from liquid crystal polymers containing ionic moieties in the backbone. The ionic moieties increase the melt viscosity of the polymers sufficiently high to blow mold articles therefrom. An illustrative liquid crystal polymer is made from 4-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid and sodium 5-sulfoisophthalate.Type: GrantFiled: March 23, 1993Date of Patent: August 22, 1995Assignee: Hoechst Celanese Corp.Inventors: James P. Shepherd, Linda C. Sawyer, Gerald Farrow
-
Patent number: 5442029Abstract: A new method for preparing commercially valuable polymeric ketones is described. The method employs an .alpha.-amiononitrile as a monomeric unit whereby an amorphous, soluble polymer having protected carbonyl moiety is obtained. Upon deprotecting the carbonyl moiety, a crystalline polymeric ketone is obtained. The method allows production of polymeric ketone materials having aromatic, aliphatic or mixed aromatic/aliphatic backbones.Type: GrantFiled: August 26, 1994Date of Patent: August 15, 1995Assignees: The Center for Innovative Technology, Virginia Polytechnic Institue & State University, Virginia Tech Intellectual PropertiesInventors: Harry W. Gibson, Ashish Pandya
-
Patent number: 5442031Abstract: Soluble polyimides are formed from oxydiphthalic anhydride and 2,4-diaminotoluene. Optionally, up to 30 mole % of an alternate diamine and up to 50 mole % of an alternate dianhydride can be used with the oxydiphthalic anhydride and 2,4-diaminotoluene.Type: GrantFiled: April 21, 1994Date of Patent: August 15, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventor: Beth E. Dunlap
-
Patent number: 5442030Abstract: Polyimides are made from the novel diamines 1,2-bis(3-aminophenyl)perfluorocyclobutane, 1,2-bis(3- or 4-aminophenyl)perfluorocyclobutene, -cyclopentene and -cyclohexene, by reaction with aromatic carboxylic anhydrides. The polyimides are useful for coatings and films.Type: GrantFiled: October 14, 1993Date of Patent: August 15, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventor: Zhenyu Yang
-
Patent number: 5438114Abstract: Macrocyclic polyimide oligomers are converted to linear polyimides by heating with a primary amine in the presence of a tertiary amine, tertiary phosphine, quaternary ammonium salt, quaternary phosphonium salt or hexaalkylguanidinium salt or heterocyclic analog thereof as a macrocyclic polyimide polymerization catalyst.Type: GrantFiled: June 17, 1994Date of Patent: August 1, 1995Assignee: General Electric CompanyInventors: Dwain M. White, Jane M. Terry
-
Patent number: 5436310Abstract: Novel aromatic poly(ether ketones) having imide, amide, ester, azo, quinoxaline, benzimidazole, benzoxazole, or benzothiazole groups, comprising, for example, a repeat unit ##STR1## are prepared by Friedel Crafts polymerization.Type: GrantFiled: June 29, 1989Date of Patent: July 25, 1995Assignee: Raychem CorporationInventors: Klaus J. Dahl, Patrick J. Horner, Heinrich C. Gors, Viktors Jansons, Richard H. Whiteley
-
Patent number: 5434240Abstract: Disclosed herein are novel poly(imide-ethers) containing ortho substitution in the main chain of the polymer. These polymers are made from novel aromatic bis-carboxylic anhydrides which contain two ether groups attached to an aromatic ring in ortho positions to each other. The polymers are particularly useful for films, fibers and encapsulation, as well as thermoplastics.Type: GrantFiled: April 29, 1994Date of Patent: July 18, 1995Assignee: The University of LiverpoolInventors: Geoffrey C. Eastmond, Jerzy Paprotny
-
Patent number: 5432256Abstract: The present invention provides a liquid crystal aligning film having a reduced after image and a good liquid crystal aligning property caused by a rubbing treatment of a thin film consisting of organics, and its liquid crystal display device.Type: GrantFiled: June 7, 1993Date of Patent: July 11, 1995Assignee: Chisso CorporationInventors: Yukino Abe, Minoru Nakayama, Shizuo Murata
-
Patent number: 5428102Abstract: A series of polyimides based on the dianhydride of 1,4-bis(3,4-dicarboxyphenoxy)benzene (HQDEA) or on 2,2-bis[4(3-aminophenoxy)phenyl]hexafluoropropane (3-BDAF) are evolved from high molecular weight polyamic acid solutions yielding flexible free-standing films and coatings in the fully imidized form which have a dielectric constant in the range of 2.5 to 3.1 at 10 GHz.Type: GrantFiled: May 2, 1994Date of Patent: June 27, 1995Assignee: The United States of America as represented by the United States National Aeronautics and Space AdministrationInventors: Anne K. St. Clair, Terry L. St. Clair, William P. Winfree
-
Patent number: 5420233Abstract: An agent for vertical orientation treatment consisting essentially of a polyimide which contains a linear alkyl group having at least 12 carbon atoms in an amount of at least 5% by weight of the alkyl group to the total weight of the polyimide, and which, when a coating film of the polyimide is formed on a substrate, has a surface energy of not more than 38 dyn/cm.Type: GrantFiled: June 15, 1993Date of Patent: May 30, 1995Assignee: Nissan Chemical Industries Ltd.Inventors: Hideyuki Isogai, Toyohiko Abe
-
Patent number: 5414069Abstract: An electroluminescent polymer comprises a main chain and a plurality of side chains, each of the side chains comprising an electroluminescent group and a flexible spacer connecting the electroluminescent group to the main chain, the spacers and the main chain being such that the electroluminescent groups are not conjugated with one another. The nature of the main chain and the spacer groups can be varied to enhance solubility, film-forming ability and other characteristics of the polymer, without significantly changing the electroluminescent properties of the polymer.Type: GrantFiled: February 1, 1993Date of Patent: May 9, 1995Assignee: Polaroid CorporationInventors: William J. Cumming, Russell A. Gaudiana, Richard T. Ingwall, Eric S. Kolb, Parag G. Mehta, Richard A. Minns
-
Patent number: 5414070Abstract: Disclosed is a poly(amide-ether-imide) and the preparation of the same. An ether chain-containing aromatic diamine is subject to thermal condensation with trimellitic anhydride (TMA) in a polar solvent to obtain diimide dicarboxylic acid, followed by polycondensing the diimide dicarboxlic acid with diamine to form the poly(amide-ether-imide). The poly(amide-ether-imide) of the present invention has superior strength, heat resistance, and processability. The preparation of the present invention is simple and economic.Type: GrantFiled: December 3, 1993Date of Patent: May 9, 1995Assignee: National Science CouncilInventors: Chin-Ping Yang, Sheng-Huei Hsiao, Jiun-Hung Lin
-
Patent number: 5412065Abstract: Polyimide oligomers are described which comprise the intercondensation product of a monomer mixture comprising (A) at least one aromatic bis(ether anhydride), (B) at least one phenylindane diamine, and (C) at least one end-cap monomer selected from the group consisting of monoanhydrides, acyl halides and amines, wherein each end-cap monomer (C) contains at least one crosslinkable group in the molecule and wherein the phenylindane diamine component (B) is present in the mixture in a stoichiometric excess. The monomers react in a suitable solvent under an inert atmosphere to form polyimide oligomers having a number average molecular weight of from about 1,000 to about 15,000. The polyimide oligomers of the present invention are readily processed to form polyimide matrix resins with high temperature and oxidative stability.Type: GrantFiled: April 9, 1993Date of Patent: May 2, 1995Assignee: Ciba-Geigy CorporationInventors: Michael Amone, Mark Southcott
-
Patent number: 5412066Abstract: Four phenylethynyl amine compounds--3 and 4-aminophenoxy-4'-phenylethynylbenzophenone, and 3 and 4-amino-4'-phenylethynylbenzophenone--were readily prepared and were used to endcap imide oligomers. Phenylethynyl-terminated amide acid oligomers and phenylethynyl-terminated imide oligomers with various molecular weights and compositions were prepared and characterized. These oligomers were cured at 300.degree. C. to 400.degree. C. to provide crosslinked polyimides with excellent solvent resistance, high strength and modulus and good high temperature properties. Adhesive panels, composites, films and moldings from these phenylethynyl terminated imide oligomers gave excellent mechanical performance.Type: GrantFiled: March 3, 1994Date of Patent: May 2, 1995Assignee: Ther United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Paul M. Hergenrother, Robert G. Bryant, Brian J. Jensen, Stephen J. Havens