Phosphorus- Or Sulfur-containing Reactant Patents (Class 528/337)
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Patent number: 5001219Abstract: High modulus, high tenacity fibers of poly-p-phenylene terephthalamide (PPD-T) are disclosed along with a fiber heat treating process for increasing the inherent viscosity and the crystallinity index of the PPD-T. Never-dried fibers swollen with water of controlled acidity are heated beyond dryness.Type: GrantFiled: January 23, 1989Date of Patent: March 19, 1991Assignee: E. I. du Pont de Nemours and CompanyInventors: Terry S. Chern, Stephan C. De La Veaux, Jacob Lahijani, James E. Van Trump
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Patent number: 4981947Abstract: A class of amide group-containing aromatic dihalide compounds are sulfidized to provide a novel class of aromatic sulfideamide polymers increased in crystalline melting point (T.sub.m). The polymers exhibit excellent resistance to high temperatures, resistance to solvents, flame-retardant properties and improved mechanical properties.Type: GrantFiled: December 22, 1988Date of Patent: January 1, 1991Assignee: Tosoh CorporationInventors: Satoshi Tomagou, Toshikazu Kato, Hiroshi Inoue, Kensuke Ogawara
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Patent number: 4980451Abstract: Aromatic polyamides having an improved resistance against thermal oxidation, are produced by utilizing monomers having a very high degree of purity, at least 99.90% by weight, preferably, at least 99.94%.Type: GrantFiled: January 31, 1990Date of Patent: December 25, 1990Assignee: Huels AktiengesellschaftInventors: Jurgen Finke, Martin Bartmann, Roland Feinauer
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Patent number: 4977232Abstract: Novel aromatic polyamides high in heat resistance and soluble in various organic solvents are obtained each by reacting 2,2'-bis[4-(4-aminophenoxy)phenyl]-hexafluoropropane or a simple derivative thereof with an aromatic dicarboxylic acid, e.g. isophthalic acid, or its dihalide or diester.Type: GrantFiled: August 3, 1988Date of Patent: December 11, 1990Assignee: Central Glass Company, LimitedInventors: Yutaka Maruyama, Haruhiko Komoriya
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Patent number: 4966954Abstract: Production of polyenaminonitriles including those which can be cyclized to very stable poly(aminoquinolines) without the evolution of any small molecules and thus in a manner free of volatiles. The polyenaminonitriles are polymers which have desirable dielectric properties, and include those which can be cyclized to poly(aminoquinolines) without the evolution of volatiles to make defect-free films and composites of similar dielectric properties because of this characteristic.Type: GrantFiled: May 23, 1988Date of Patent: October 30, 1990Assignee: Rensselaer Polytechnic InstituteInventors: James A. Moore, Douglas Robello
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Patent number: 4962183Abstract: The present invention provides novel heat stable polyamide-imide polymers having excellent flow properties and moisture stability which render them more readily processible into fibers, films, sheets and other molded articles. The polymers are prepared by forming the polycondensation product of one or more aromatic diamines, one or more tetrafunctional aromatic dianhydrides, and a difunctional aromatic carboxylic acid or amide-forming derivative thereof containing the groups ##STR1## linking two aromatic moieties, wherein R is CF.sub.3 or phenyl. In addition to improved flow properties, the polyamide-imide polymers of this invention also exhibit improved solubility properties in most organic solvents, improved resistance to attack by chlorinated solvents such as trichloroethylene as compared with polyimides, improved hydrophobic properties as well as excellent thermal properties, including resistance to thermooxidative degradation.Type: GrantFiled: May 8, 1989Date of Patent: October 9, 1990Assignee: Hoechst Celanese Corp.Inventors: Paul N. Chen, Sr., Rohitkumar H. Vora
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Patent number: 4962181Abstract: The present invention provides novel heat stable polyamide polymer having excellent flow properties which render them more readily processible into fibers, films, sheets and other molded articles. The polymers are prepared by forming the polycondensation product of one or more aromatic diamines and one or more aromatic dibasic acid monomers or amide-forming derivatives thereof, at least one of said diamine monomers having the structure: ##STR1## where R is CF.sub.3 or phenyl. The polyamides of this invention exhibit improved solubility and low temperature flow characteristics, low moisture uptake, high thermal stability, low dielectric constant and good hydrolytic stability.Type: GrantFiled: May 8, 1989Date of Patent: October 9, 1990Assignee: Hoechst Celanese Corp.Inventor: Rohitkumar H. Vora
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Patent number: 4960854Abstract: There are provided aromatic heterocyclic polymers having repeating units of the formula ##STR1## wherein R.sub.1 is --H or R.sub.2 is ##STR2## R.sub.3 is ##STR3## and R.sub.4 is R.sub.2 or ##STR4## and B is ##STR5## wherein X is --S--, --O--, or --NH--.Type: GrantFiled: September 25, 1989Date of Patent: October 2, 1990Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Fred E. Arnold, Jerry L. Burkett
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Patent number: 4960858Abstract: There are provided aromatic heterocyclic polymers having repeating units of the formula ##STR1## wherein X is --S--, --O-- or --NH--.Type: GrantFiled: September 25, 1989Date of Patent: October 2, 1990Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Fred E. Arnold, Jerry L. Burkett
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Patent number: 4960853Abstract: There are provided copolymers having repeating units of the formula ##STR1## wherein R.sub.1 is --H or ##STR2## R.sub.2 is ##STR3## R.sub.3 is ##STR4## and R.sub.4 is R.sub.2 or ##STR5## and B is ##STR6## wherein X is --S--, --O-- or --NH--; and wherein y ranges from about 0.02 to 0.20 and z is 1.0-y.Type: GrantFiled: October 23, 1989Date of Patent: October 2, 1990Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Fred E. Arnold, Jerry L. Burkett
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Patent number: 4958003Abstract: A class of amide group-containing aromatic dihalide compounds are sulfidized together with a class of aromatic dihalide compounds to provide a novel class of aromatic sulfideamide polymers increased in crystalline melting point (T.sub.m). The polymers exhibit excellent resistance to high temperatures, resistance to solvents, flame-retardant properties and improved mechanical properties.Type: GrantFiled: December 23, 1988Date of Patent: September 18, 1990Assignee: Tosoh CorporationInventors: Satoshi Tomagou, Toshikazu Kato, Hiroshi Inoue, Kensuke Ogawara
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Patent number: 4948867Abstract: A method of producing a prepolymer of aromatic polythiazole from an aromatic diaminodithiol compound or a salt thereof and a dicarboxylic acid derivative, the prepolymer having a repeating unit represented by the following general formula: ##STR1## wherein R.sub.1 is an aromatic group having at least one benzene nucleus, and R.sub.2 is a residual group of the dicarboxylic acid derivative, comprising the step of polymerizing the aromatic diaminodithiol compound or a salt thereof and the dicarboxylic acid derivative by an interfacial polymerization method.Type: GrantFiled: June 2, 1989Date of Patent: August 14, 1990Assignee: Honda Giken Koygo Kabushiki KaishaInventors: Hideo Nishino, Tatsuya Hattori, Tsuneharu Kushida, Masataka Kumata
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Patent number: 4945153Abstract: A method of producing a prepolymer of aromatic polythiazole from an aromatic diaminodithiol compound salt and a dicarboxylic acid derivative, comprising the step of polymerizing the aromatic diaminodithiol compound salt and the dicarboxylic acid derivative in the presence of a phosphoric acid compound at a temperature of 70.degree.-140.degree. C.Type: GrantFiled: June 7, 1989Date of Patent: July 31, 1990Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Hideo Nishino, Tatsuya Hattori, Tsuneharu Kushida, Masataka Kumata
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Patent number: 4943625Abstract: An adhesive copolyamide composition having a dry powder DSC melting point of at least 100.degree. C., a glass transition temperature above 60.degree. C., a dry powder softening point of at least 100.degree. C., preferably a water content after storage in water of more than 20% by weight, and a wet softening point of less than 100.degree.. Such compositions exhibit softening points and heat resistances in excess of 100.degree. C. and can be processed and set at substantially lower temperatures. No low molecular weight additives are required nor are any solvents necessary. The compositions are comparable in their heat-resistance, softening points, and bond strength to conventional high performance hot melt adhesives.Type: GrantFiled: September 7, 1988Date of Patent: July 24, 1990Assignee: Ems-Inventa AGInventors: Manfred Hewel, Annette Lavalette, Frank Annighofer
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Patent number: 4939235Abstract: This invention relates in general to the formation of thick films having a biaxial molecular orientation. Such films are prepared in accordance with the present invention from rod-like extended chain aromatic-heterocyclic ordered polymers. Such films have high tensile strength, modulus, and environmental resistance characteristics.A preferred ordered polymer for use in the present invention is poly (para - phenylenebenzo bisthiazole), (PBT), a compound having the structure: ##STR1## The present invention is also directed to methods and apparatus suitable for producing biaxially oriented films, coatings, and like materials from ordered polymers, preferably PBT.Type: GrantFiled: June 7, 1988Date of Patent: July 3, 1990Assignees: Foster-Miller, Inc., Albany International Research CompanyInventors: Andrew C. Harvey, Richard W. Lusignea, Dirk M. Baars, Donald D. Bretches, Robert B. Davis
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Patent number: 4937321Abstract: A process for preparing poly{[benzo (1,2-d:5,4-d')bisthiazole-2,6-diyl]-1,4-phenylene} or one of the reactants used in the preparation of such polymer by the use of an electrolytic cell. In the process, thiocyanate ions are oxidized to thiocyanogen in the anode chamber of the cell. In a preferred embodiment, the cathode chamber of the same electrolytic cell is used to reduce 4,6-dithiocyanobenzene-1,3-diamine to form the dithio radical of 4,6-diaminobenzene-1,3-dithiol. Upon hydrogenation, the dithiol or its acid salt may be used to react with terephthalic acid to form the polymer.Type: GrantFiled: October 17, 1983Date of Patent: June 26, 1990Assignee: Hoechst Celanese Corp.Inventor: James E. Kuder
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Patent number: 4937315Abstract: Amorphous and transparent copolyamides having glass transition temperatures, Tg, greater than 140.degree. C. and improved thermomechanical properties, well adopted for the production of a wide variety of useful shaped articles, contain specified amounts of terephthalic acid, 2-methylpentamethylenediamine and hindered aromatic diamine recurring structural units.Type: GrantFiled: June 15, 1989Date of Patent: June 26, 1990Assignee: Rhone-Poulenc ChimieInventor: Pascal Barthelemy
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Patent number: 4937322Abstract: Crystallized semiaromatic copolyamides having glass transition temperatures, Tg, greater than 142.degree. C., melting points, Tm, less than 290.degree. C. and improved thermomechanical properties, well adopted for the production of a wide variety of useful shaped articles, contain specified amounts of terephthalic acid, 2-methylpentamethylenediamine and hindered aromatic diamine recurring structural units.Type: GrantFiled: June 15, 1989Date of Patent: June 26, 1990Assignee: Rhone-Poulenc ChimieInventor: Pascal Barthelemy
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Patent number: 4914180Abstract: Polyamides having improved solubility and processing characteristics are provided having incorporated into the polymeric chain a novel aromatic diamine compound, 2-(3-aminophenyl)-2-(4-aminophenyl) hexafluoropropane (3-4'-6F Diamine). The polyamides are prepared by reacting the 3,4'-6F Diamine with an aliphatic or aromatic di-acid or acid halide. It has been found that the polyamides of this invention have improved solubility characteristics, low dielectric constants and improved thermal flow properties as a consequence of the meta/para positioning of the amino groups on the daimine, which renders these polymers more readily melt spinnable for the production of fibers. The polymers may also be compression molded and fabricated into composites at moderate temperatures and pressures.Type: GrantFiled: September 30, 1988Date of Patent: April 3, 1990Assignee: Hoechst Celanese CorporationInventor: Rohitkumar H. Vora
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Patent number: 4910293Abstract: An amphiphilic high polymer comprises a linear recurring unit containing at least divalent organic group (R.sub.1) having at least two carbon atoms, at least divalent organic group (R.sub.2) having at least two carbon atoms, and at least one C.sub.10-30 hydrocarbon-containing group (R.sub.3) which may have one or more substituent groups, said organic groups R.sub.1 and R.sub.2 being connected to each other by a divalent connecting group, and said hydrocarbon-containing group R.sub.3 being boned to said recurring unit by a covalent bond, and the method for producing the same comprises polycondensating a combination of monomers containing R.sub.1 and R.sub.2.Type: GrantFiled: October 11, 1988Date of Patent: March 20, 1990Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Masakazu Uekita, Hiroshi Awaji
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Patent number: 4900805Abstract: There are provided heterocyclic polymers having repeating units of the formula ##STR1## wherein R.sub.1 is --H or ##STR2## R.sub.2 is ##STR3## R.sub.3 is ##STR4## and R.sub.4 is R.sub.2 or ##STR5## and B is ##STR6## wherein X is --S--, --O-- or --NH--.Type: GrantFiled: July 29, 1988Date of Patent: February 13, 1990Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Fred E. Arnold, Jerry L. Burkett
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Patent number: 4900806Abstract: There are provided copolymers having repeating units of the formula ##STR1## wherein R.sub.1 is --H or ##STR2## wherein X is --S--, --O-- or --NH--; and wherein Y ranges from about 0.02 to 0.20 and z is 1.0-y.Type: GrantFiled: July 29, 1988Date of Patent: February 13, 1990Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Fred E. Arnold, Jerry L. Burkett
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Patent number: 4898924Abstract: A process is disclosed for the production of biaxially oriented liquid crystal films. The process includes:(i) forming an anisotropic dope from a polymerization solution of rigid rod heterocyclic liquid crystalline polymers such as poly{[benzo(1,2-d:4,5-d')bisthiazole-2,6-diyl] 1,4-phenylene}, its cis isomer or mixtures thereof, and poly{[benzo(1,2-d:4,5-d')bisoxazole-2,6-diyl] 1,4-phenylene}, its cis isomer or mixtures thereof, and a solvent such as polyphosphoric acid;(ii) extruding the dope to form a film;(iii) imparting biaxial orientation to the film to increase the transverse strength thereof;(iv) solidifying the biaxially oriented film; and(v) washing the solidified film to remove the solvent. Also disclosed is a liquid crystal film produced by the above process.Type: GrantFiled: January 11, 1989Date of Patent: February 6, 1990Assignee: Hoechst Celanese CorporationInventors: Edward C. Chenevey, Edward R. Kafchinski
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Patent number: 4895928Abstract: Melt-processable polyaramide and polyarylate polymers and copolymers are made employing a component containing the 5-t-butylisophthaloyl moiety and aromatic diamines or aromatic diols. The melt processability of these polymers can eliminate expensive processing in making shaped articles. The claimed materials are useful for making fiber, film, laminates, coatings, adhesives and molded objects.Type: GrantFiled: June 17, 1988Date of Patent: January 23, 1990Assignee: Amoco CorporationInventors: David J. Fenoglio, Edward E. Paschke, James R. Stephens
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Patent number: 4894422Abstract: A water soluble or brine soluble rod-like polymer characterized by the formula: ##STR1## wherein n and n' are a 2 to 22 straight chained or branched chained alkyl or cycloalkyl group, and the level of sulfonation is about 20 to about 100 mole %, and M is a tertiary amine or a metal cation selected from the group consisting of alumina, iron, lead, Groups IA, IIA, IB ad IIB of the Periodic Table of Elements and level of alkylation is about 1.0 to 60 mole %.Type: GrantFiled: December 19, 1988Date of Patent: January 16, 1990Assignee: Exxon Research & Engineering CompanyInventors: Dennis G. Peiffer, Jeff J. Kaladas
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Patent number: 4892921Abstract: Provided are novel para-ordered aromatic heterocyclic polymers having repeating groups of the following formula ##STR1## wherein Y is --O--, --S--, or --NH--, n is 1 or 2, and Q is ##STR2## wherein Z is --O-- or --S--. There are also provided methods for preparing the above polymers.Type: GrantFiled: February 21, 1989Date of Patent: January 9, 1990Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Tsu-Tzu Tsai, Fred E. Arnold
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Patent number: 4892953Abstract: Phenylbenzthiazole-substituted p-terphenylene dicarboxylic acids of the formula ##STR1## wherein R.sub.1 is --H or ##STR2## R.sub.2 is ##STR3## R.sub.3 is ##STR4## and R.sub.4 is R.sub.Type: GrantFiled: July 29, 1988Date of Patent: January 9, 1990Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Fred E. Arnold, Jerry L. Burkett
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Patent number: 4866159Abstract: Polyaminoamides of formula: ##STR1## in which A.sub.1 represents a divalent radical of structure: ##STR2## in which a and b=0 or 1 ##STR3## in which c and d=0 or 1 or ##STR4## B.sub.1 represents: (1) in the proportions of 60 to 100% (in moles), the radical ##STR5## in which x.sub.1 =2 and n.sub.1 =1 or 2, or alternatively, x.sub.1 =3 and n.sub.1 =1 and e=0 or 1(2) in the proportions of 0 to 40% (in moles), the radical (II) above in which x.sub.1 =2 and n.sub.1 =0 or the radical ##STR6## (3) in the proportions of 0 to 20% (in moles), the radical--NH--(CH.sub.2).sub.6 --NH--;in radicals A.sub.1 and B.sub.1, Y represents a residue of an ultraviolet radiation-absorbing molecule, anda+b+c+d+e.gtoreq.1,it being understood that when a, b, c, d or e are zero, the nitrogen atom is then bound to a hydrogen atom;the ratio m/p is between 0.05 and 0.5;A.sub.2 represents a bivalent radical which has one of the following structures: ##STR7## B.sub.Type: GrantFiled: August 25, 1986Date of Patent: September 12, 1989Assignee: L'OrealInventors: Serge Forestier, Gerard Lang, Edith Sainte Beuve
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Patent number: 4855397Abstract: Polyesteramide resins useful for forming containers having improved resistance to gas permeability comprising the reaction product of(A) a dicarboxylic acid corresponding to the structure ##STR1## wherein X is --O--, --S-- or ##STR2## n.sub.1 is 0 or 1 and R.sub.1 is an aromatic structure containing 6 to 15 carbons, and(B) An aminoalcohol corresponding to the formula ##STR3## where n.sub.2 is 0 or 1 and R.sub.2 is an alphatic structure of 1 to 12 carbons.Type: GrantFiled: November 17, 1988Date of Patent: August 8, 1989Assignee: Eastman Kodak CompanyInventors: Robert B. Barbee, Larry A. Minnick
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Patent number: 4847334Abstract: Coating compositions suitable for use as coatings or inks for metallic foils, such as aluminum foil, as well as for use on other materials, such as papers and plastics resin films, are disclosed. These compositions comprise a water dispersible polyester resin, an alkylated amino resin, a water dispersible epoxy resin and water. They may optionally include a pigment and other optional modifying ingredients. These compositions, being water-based, provide improved environmental compatibility and may be dried under relatively low temperatures without objectional ammonia residue odor.Type: GrantFiled: December 9, 1988Date of Patent: July 11, 1989Assignee: Reynolds Metals CompanyInventor: Gerald L. Thompson
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Patent number: 4847350Abstract: Rapid process for the formation of heterocyclic aromatic polymers by contacting one or more appropriate multifunctional aromatic compounds, such as a diaminobenzenediol, a terephthaloyl halide and/or an aminohydroxybenzoic acid, with a sulfonic acid and a dehydrating agent.Type: GrantFiled: May 27, 1986Date of Patent: July 11, 1989Assignee: The Dow Chemical CompanyInventor: William J. Harris
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Patent number: 4840977Abstract: Photosensitive iodonium polymers are provided useful as positive photoresists. The iodonium polymers can be converted to polymeric diaryl iodonium polyfluorometal and metalloid salts by a metathesis reaction. These polymeric iodonium polyfluorometal and metalloid salts can be used as a catalyst in combination with a copper compound cocatalyst to make heat curable compositions with cationically polymerizable materials such as an epoxy resin.Type: GrantFiled: October 1, 1987Date of Patent: June 20, 1989Assignee: General Electric CompanyInventors: James V. Crivello, Julia L. Lee
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Patent number: 4835246Abstract: Provided are novel para-ordered aromatic heterocyclic polymers having repeating groups of the following formula ##STR1## wherein Y is --O--, --S--, or --NH--, n is 1 or 2, and Q is ##STR2## wherein Z is --O-- or --S--. There are also provided methods for preparing the above polymers.Type: GrantFiled: August 13, 1987Date of Patent: May 30, 1989Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Tsu-Tzu Tsai, Fred E. Arnold
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Patent number: 4832869Abstract: The present invention relates to electrically conducting organic polymers useful for spacecraft and other uses. The invention describes a number of conductive organic polymers having an electrical conductivity greater than 10.sup.-2 ohm .sup.-1 cm.sup.-1. The structures of the organic polymers contain heteroatoms such as oxygen, nitrogen and sulfur which are found in alkylene, aralkyl and aryl groups. Optionally, organic and inorganic dopants are used to increase the conductivity of the polymer. These materials are useful for conductive coatings and shielding applications, in energy storage and conversion devices, as battery anodes or cathodes, semiconductor materials and in integrated electroptics for switching, logic and display.Type: GrantFiled: May 6, 1986Date of Patent: May 23, 1989Assignee: SRI InternationalInventor: David B. Cotts
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Patent number: 4824916Abstract: Novel sulfonated polyamide and polyurea materials are described. The polymers are water-soluble or water-dispersible, if not crosslinked. The polymers can be crosslinked with polyvalent cations or crosslinking agents. The polymers have utility as membranes, thickeners, coatings and adhesives.Type: GrantFiled: July 14, 1986Date of Patent: April 25, 1989Assignee: The Dow Chemical CompanyInventors: Larry D. Kershner, Charles E. Reineke, Nitis Sarkar, Larry R. Wilson
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Patent number: 4824932Abstract: The invention relates to aromatic polyamides and polyamidimides, and a method of manufacturing these by transamidation of aromatic biasmides of carboxylic acids, using aromatic di- and/or tricarboxylic acids or their anhydrides, in the melt, at temperatures between 220.degree. to 390.degree. C.Type: GrantFiled: December 30, 1986Date of Patent: April 25, 1989Assignee: Huls AktiengesellschaftInventors: Juergen Finke, Martin Bartmann
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Patent number: 4822863Abstract: Aliphatic polyamides are reacted on their surfaces with sulphuryl chloride, either neat or in solution in paraffins or cycloparaffins to give reactive intermediate whcih may convert into a support capable of reaction with antibodies or enzymes by providing covalent chemical links to which the antibodies or enzymes may be bound.Type: GrantFiled: June 27, 1986Date of Patent: April 18, 1989Assignee: Memtec LimitedInventor: Douglas L. Ford
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Patent number: 4818809Abstract: Aromatic sulfide amide polymers composed of a repeating unit having the formula (I) and a repeating unit having the formula (II) below, having an inherent viscosity ranging from 0.02 to 10 dl/g. ##STR1## wherein, Ar.sup.1, Ar.sup.2, Ar.sup.3 and Ar.sup.4 are same or different aromatic rings and R.sup.1, R.sup.2, R.sup.3 and R.sup.Type: GrantFiled: September 14, 1987Date of Patent: April 4, 1989Assignee: Toyo Soda Manufacturing Co., Ltd.Inventors: Tomohiro Ishikawa, Yozo Kondo
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Patent number: 4812531Abstract: Thermosettable prepolymers or polymers are prepared by reacting (A) the reaction product of (1) a heterocyclic material having one or more rings, at least one nitrogen atom and at least two substituent groups which have at least one reactive hydrogen atom attached to a carbon atom which is attached to a heterocyclic ring such as 2,3,5,6-tetramethylpyrazine; (2) a cycloaliphatic or aromatic carboxylic acid mono- or dianhydride such as pyromellitic dianhydride; and (3) a material containing a polymerizable ethylenically unsaturated group and at least one group selected from (a) a heterocyclic material having one or more rings, at least one nitrogen atom and at least one substituent group which has at least one reactive hydrogen atom attached to a carbon atom which is attached to a heterocyclic ring such as 2-methyl-5-vinyl pyridine or (b) a cycloaliphatic or aromatic carboxylic acid mono- or dianhydride group such as cis-5-norbornene-endo-2,3-dicarboxylic anhydride; with (B) an aqueous or alcoholic solution ofType: GrantFiled: February 28, 1986Date of Patent: March 14, 1989Assignee: The Dow Chemical CompanyInventor: Duane S. Treybig
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Patent number: 4772678Abstract: Novel liquid crystalline extended chain polymer compositions comprising a high concentration of one or more extended chain homopolymer(s), copolymer(s), or block polymer(s) and certain strong acids are prepared by admixing a high concentration of one or more selected homo- or hetero-bifunctional monomer(s) with or without oxidation protecting atoms or groups and one or more of a substantially non-oxidizing strong acid(s) having a high or low P.sub.2 O.sub.5 content. Such compositions are capable of exhibiting excellent cohesive strength, and are especially suited to the production of high molecular weight ordered polymer fibers by dry-jet wet spinning. These liquid crystalline compositions are capable of being drawn through long air gap distances and spun at exceptionally high spin draw ratios. Fibers, films and other articles formed from these liquid crystalline compositions exhibit exceptionally high physical and heat resistant properties.Type: GrantFiled: August 5, 1985Date of Patent: September 20, 1988Assignee: CommTech International Management CorporationInventors: Joanne R. Sybert, James F. Wolfe, Paul D. Sybert, Blake Wilson
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Patent number: 4754016Abstract: A process for preparing a polyamide which comprises polycondensing a dicarboxylic acid and a diamine by using a combination of at least one phosphine and at least one disulfide as the condensing agent.Type: GrantFiled: June 3, 1986Date of Patent: June 28, 1988Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Hideo Ai, Akihiko Ikeda, Yoshio Matsuoka
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Patent number: 4752642Abstract: Aromatic polyamide resins having repeating units, each containing at least one m-ethynyl amido subunit: ##STR1## These resins can be thermally treated to undergo intra-molecular cyclization, without evolution of volatiles, into polyimidines containing the following subunit.Type: GrantFiled: September 16, 1986Date of Patent: June 21, 1988Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Robert C. Evers, George J. Moore
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Process for the manufacture of polyamides from diamine and diamide utilizing carboxamide as catalyst
Patent number: 4734487Abstract: Nylon-type polyamides are produced from a diamine and a diamide in contact with a catalyst comprising a carboxamide. For example, high quality nylon-6,6 is manufactured by contacting hexamethylenediamine and adipamide in water with a carboxamide, at an elevated temperature and pressure.Type: GrantFiled: December 16, 1985Date of Patent: March 29, 1988Assignee: The Standard Oil CompanyInventors: Benedict S. Curatolo, Robert C. Sentman, Gerald P. Coffey -
Patent number: 4727130Abstract: This invention relates to a method of manufacturing aromatic polyamides having general formula(--CO--Ar--CO--NH--Ar'--X--Ar"--Y--Ar"--X--Ar'--NH--).sub.mwhere Ar, Ar', and Ar" each represent an m- or p-phenylene group, possibly substituted with alkyl groups having 1 to 4 carbon atoms; and X is O and Y is SO.sub.2 or X is SO.sub.2 and Y is O. In the present method, isophthalic and/or terephthalic acids are reacted with diamines of the formulaH.sub.2 N--Ar'--X--Ar"--Y--Ar"--X--Ar--NH.sub.2in the presence of a catalytic amount of an acid derived from phosphorus and having formula H.sub.3 PO.sub.n (where n=2, 3 or 4), or in the presence of triphenyl phosphite, and possibly in the presence of a 4-dialkylaminopyridine, in a polar, aprotic, organic solvent, at temperatures between 160.degree. and 300.degree. C.Type: GrantFiled: September 9, 1986Date of Patent: February 23, 1988Assignee: Huls AktiengesellschaftInventor: Martin Bartmann
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Patent number: 4721772Abstract: An aromatic polyamide having a high molecular weight is produced by a polycondensation reaction of an aromatic aminocarboxylic acid and/or a mixture of an aromatic dicarboxylic acid and an aromatic diamine in a polar solvent in the presence of a dehydrating catalyst with heating at a temperature of about 160.degree. C. or higher.Type: GrantFiled: June 27, 1983Date of Patent: January 26, 1988Assignee: Sumitomo Chemical Company, LimitedInventors: Katsuji Ueno, Kenji Nagaoka, Akira Miyashita
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Patent number: 4720538Abstract: A method of manufacturing polyamides from aromatic dicarboxylic acids and aromatic diamines in the presence of catalytic amounts of a phosphorous-containing catalyst and a 4-diakylaminopyridine as cocatalyst, at temperatures above 180.degree. C., is described.Type: GrantFiled: July 24, 1986Date of Patent: January 19, 1988Assignee: Huls AktiengesellschaftInventor: Martin Bartmann
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Patent number: 4717764Abstract: A two stage process for the production of benzimidazole/aromatic amide polymers and copolymers and wholly aromatic polyamides is provided wherein an aromatic amine component comprising an aromatic diamine or triamine and optionally, an aromatic tetraamine is reacted with an aromatic dicarboxylic acid and/or ester. The reactants are heated with agitation in a first stage to a temperature at least sufficient to initiate condensate evolution. The agitation is then discontinued and the reaction is allowed to proceed, in many cases with the formation of a foam while heating is continued. The reaction mass is then allowed to solidify by cooling and is crushed to a ground prepolymer which is heated with agitation in a second stage to a temperature higher than that of the first stage until the desired polymer is obtained. The invention also includes certain benzimidazole/aromatic amide polymers and copolymers as new compositions of matter.Type: GrantFiled: September 26, 1985Date of Patent: January 5, 1988Assignee: Celanese CorporationInventor: Bennett C. Ward
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Patent number: 4713438Abstract: Described herein are amide and/or imide containing polymers based on novel monomers that contain isoalkylidene bridges. These polymers have excellent toughness combined with high temperature stability, low water absorption, and good melt-fabricability.Type: GrantFiled: December 24, 1986Date of Patent: December 15, 1987Assignee: Amoco CorporationInventors: James E. Harris, Abe Berger, Vilas M. Chopdekar, Markus Matzner, James Spanswick
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Patent number: 4709006Abstract: A polymer having repeating units of the general formula ##STR1## wherein BB is a benzobisaxazole, benzobisthiazole or benzobisimidazole group and Y is a phenolic, pyridyl or phenoxyphenyl group.Type: GrantFiled: April 16, 1986Date of Patent: November 24, 1987Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Tsu-Tzu Tsai, Fred E. Arnold
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Patent number: 4695383Abstract: A permselective membrance suitable for obtaining fresh water by the desalination of sea water and salt water is provided herein, said permselective membrane being prepared by the reaction of an aromatic polycarboxylic acid component with a mixed diamine component comprising a diaminodiphenylsulfone compound of the formula (I), ##STR1## wherein R.sup.1 is hydrogen atom or a C.sub.1 -C.sub.12 hydrocarbon group, R.sup.2 s may be same or different, each representing a monovalent organic group, and n is an integer of 0 or 1 to 3, and an alicyclic diamine compound containing two secondary amino groups in the same or different ring(s).Type: GrantFiled: March 5, 1987Date of Patent: September 22, 1987Assignee: Toyo Boseki Kabushiki KaishaInventors: Shigeji Konagaya, Osamu Watanabe, Hideshi Kuzumoto, Masaya Tokai, Haruhiko Narusawa, Yasuo Kato