Phenolic Reactant Contains At Least Two Aryl Rings And Two Diverse Phenolic To Oxygen Bonds Patents (Class 528/185)
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Patent number: 4847359Abstract: Compounds containing at least 5 mol % of structural units of the formulae I and/or II ##STR1## in which Q is an unsubstituted or substituted tetravalent aromatic radical to which in each case two carbonyl groups are bonded in the ortho- or peri-position, R.sup.1 is selected from the radicals of the formulae III, IV and V ##STR2## R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are hydrogen, alkyl, cycloalkyl or substituted or unsubstituted aryl or aralkyl, R.sup.6 and R.sup.7 are aryl or halogen, m and n are 0, 1 or 2 and o is 0, 1, 2, 3 or 4, are described.The compounds are distinguished by an increased resistance to oxidation by heat. They can be used to produce coatings and relief structures.Type: GrantFiled: June 19, 1987Date of Patent: July 11, 1989Assignee: Ciba-Geigy CorporationInventors: Josef Pfeifer, Rudolf Duthaler
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Patent number: 4847354Abstract: The invention relates to filaments, fibers, pulps, films and sheets from a copolyamide which has at least the recurring structural units of the formulaeA --OC--AR--CO--B --NH--Ar'--NH-- ##STR1## and in which the diamine components B, C and D relative to the total amount of diamine components in mol-% are within a predetermined domain. Such copolyamides can be produced from the corresponding diamines and dicarbonyl dichlorides in aprotic solvents in the presence or absence of metal halides of the first or second group of the periodic table. The spinning solutions obtainable therein can be processed in conventional manner into the claimed shaped structures.Type: GrantFiled: March 20, 1986Date of Patent: July 11, 1989Assignee: Hoechst AktiengesellschaftInventors: Gunter Keil, Franz Jakob, Klaus Warning, Friedrich Herold
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Patent number: 4845183Abstract: Heat resistant, shapable, hydroxy and/or alkoxy-substituted polyamides derived from at least one diamine selected from unsubstituted and substituted 4,4'-bis[2-(4-amino-3-hydroxyphenyl)hexafluoroisopropyl)]diphenyl ether 4,4'-bis-[2-(3-amino-4-hydroxyphenyl)hexafluoroisopropyl]diphenyl ether and a dicarboxylic acid or a derivative thereof e.g. its acid halo or ester. The polyamides of the invention may be thermally cured to form polybenzoxazoles of higher heat resistance which are stable to hydrolytic, chemical and radiation attack.The polyamides of the invention may be formed into shaped articles by molding, extrusion and solvent casting processes preferably in the presence of a solvent or diluent and then optionally converted into heat resistant, insoluble polybenzoxazoles. These shaped articles are useful in aircraft, electronic and other commercial applications where heat, chemical and radiation resistance are desired in conjunction with good mechanical and electrical properties.Type: GrantFiled: November 24, 1987Date of Patent: July 4, 1989Assignee: Hoechst Celanese CorporationInventors: Werner H. Mueller, Dinesh N. Khanna
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Patent number: 4839128Abstract: Copolyesteramides consisting of specific units can be injection molded at a low temperature into a part having a high heat distortion temperature. A filled composition is obtained by blending the copolyesteramide with an inorganic filler. A magnetic resin composition is obtained by blending the copolyesteramide with an magnetic powder.The copolyesteramide consists essentially of units <I>, <II>, <III>, <IV>, and <V> of the following formulae: ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is independently at least one divalent radical selected from the group consisting of para-phenylene, 2,6-naphthalene, and 4,4'-biphenylene,R.sup.5 is a para- or meta-phenylene radical,X.sup.1 is --NH--,X.sup.Type: GrantFiled: January 28, 1988Date of Patent: June 13, 1989Assignee: Kawasaki Steel Corp.Inventors: Kenji Yoshino, Tadahiro Wakui, Yumiko Kumazawa, Mitsuhiko Izumi, Touru Yamagishi
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Patent number: 4837298Abstract: Cyclic imides are prepared by the reaction of a bis(dicarboxyphenyl) sulfide or functional derivative thereof, and optionally a second tetracarboxylic acid or functional derivative thereof such as 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride, with a diamine having a spirobiindane nucleus. The cyclic imides may be converted to linear polyimides by reaction with a basic alkali metal sulfide.Type: GrantFiled: June 22, 1987Date of Patent: June 6, 1989Assignee: General Electric CompanyInventors: James A. Cella, Thomas L. Guggenheim
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Patent number: 4837299Abstract: A process for making thermoplastic polyimides which involves reacting an aromatic dianhydride with an organic diamine in the presence of a tertiary amine in an inert solvent to form a polyamide acid salt; separating the polyamide acid salt from the solvent; and heating the polyamide acid salt under imidization conditions to form the desired polyimide.Type: GrantFiled: December 31, 1986Date of Patent: June 6, 1989Assignee: General Electric CompanyInventors: Edward N. Peters, Michael W. Schultz
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Patent number: 4837300Abstract: Novel copolyimides are prepared by reacting one or more aromatic dianhydrides with a meta-substituted phenylene diamine and an aromatic bridged diamine. The incorporation of meta-substituted phenylene diamine derived units and bridged aromatic diamine derived units into the linear aromatic polymer backbone results in a copolyimide of improved flexibility, processability, and melt-flow characteristics. The novel copolyimides are especially useful as thermoplastic hot-melt adhesives.Type: GrantFiled: July 9, 1987Date of Patent: June 6, 1989Assignee: The United States of America as represented by the Administration of the National Aeronautics and Space AdministrationInventors: Terry L. St. Clair, Harold D. Burks, Donald J. Progar
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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: 4833228Abstract: A linear rodlike polyester of controlled rigidity and packing density which melts below 350.degree. C. and consists essentially of recurring units of the formula (1) ##STR1## in which A, B, C and D are the same or different cyclic moieties selected from the group consisting of 1,4-phenylene and 1,4-cyclohexylene; n is Zero or 1; Z.sup.1, Z.sup.2 and Z.sup.3 are the same or different and are selected from the group of bivalent links consisting of the covalent bond (--) and of linkages --COO--, --OOC--, --CH.sub.2 CH.sub.2 --, --CH.sub.2 O--, --OCH.sub.2 --, --OCH.sub.2 CH.sub.2 O--, --OCH.sub.2 OCH.sub.2 -- and --CH.sub.2 OCH.sub.2 O--; X.sup.1, X.sup.2, X.sup.3 and X.sup.Type: GrantFiled: March 17, 1988Date of Patent: May 23, 1989Inventor: Maged A. Osman
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Patent number: 4831104Abstract: The thermoplastic aromatic polyamideimide compolymers comprising the structural units (1), (2) and (3) represented by formulae, ##STR1## respectively, (2) and (3) being at ratio of 1 mole to 1 mole of (1), (3) being at a ratio of 0.95-0.05 mole to 0.05-0.95 mole of (2), (1) and (2) or (3) being alternatively interconnected and Ar and Ar' being composed of 5 to 70 mole % of ##STR2## and 95 to 30 mole % of ##STR3## provide the moldings being superior in heat stability and fluidity at the temperatures of 300.degree. to 400.degree. C. and injection moldable and having desired characteristics.Type: GrantFiled: July 31, 1987Date of Patent: May 16, 1989Assignee: Toray Industries, Inc.Inventors: Toshihiko Aya, Sho Kadoi
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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: 4820791Abstract: New polyimides have been prepared from the reaction of aromatic dianhydrides with novel aromatic diamines containing carbonyl and ether connecting groups between the aromatic rings. Several of these polyimides were shown to be semi-crystalline as evidenced by wide angle x-ray diffraction and differential scanning calorimetry. Most of the semi-crystalline polyimides form tough solvent resistant films with high tensile properties. One of these materials exhibits very high fracture toughness and can be thermally processed.Type: GrantFiled: February 5, 1987Date of Patent: April 11, 1989Assignee: United States of AmericaInventors: Paul M. Hergenrother, Stephen J. Havens
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Patent number: 4820793Abstract: An aromatic polyamide of sufficiently high molecular weight is prepared by reacting a diphenyldiamino compound having a hydroxyl or siloxyl group in each phenyl group and a Si-containing substituent in each amino group, e.g. 2,2-bis(3-trimethylsilylamino-4-trimethylsiloxyphenyl) propane, with an aromatic dicarboxylic acid dihalide in an organic solvent. The polyamide can be converted into a polybenzoxazole by a dehydrating and cyclizing reaction at 100.degree.-500.degree. C.Type: GrantFiled: May 28, 1987Date of Patent: April 11, 1989Assignee: Central Glass Company, LimitedInventors: Yoshio Imai, Masaaki Kakimoto, Yoshiyuki Oishi, Yutaka Maruyama
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Patent number: 4808754Abstract: Cyclic polyamide oligomers are prepared by the reaction of various spirobiindane diamines, including spirobiindane bisphenol bis-aminophenoxy ethers, with dicarboxylic acid chloride such as isophthaloyl chloride. The oligomer compositions may be converted to copolyamides by reaction with lactams in the presence of basic reagents.Type: GrantFiled: February 27, 1987Date of Patent: February 28, 1989Assignee: General Electric CompanyInventors: Thomas L. Guggenheim, Joseph W. Guiles, Sharon J. McCormick
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Patent number: 4797466Abstract: This invention relates to a novel polyimide and describes method of its preparation, adhesives of the polyimide and the method for their application.The polyimide has recurring units of the formula ##STR1## (where R is a tetra-valent radical selected from the group consisting of aliphatic radical having not less than two carbons, cyclo-aliphatic radical, monoaromatic radical, condensed polyaromatic radical, and non condensed polyaromatic radical wherein aromatic radicals are mutually connected with a bond or a crosslinking function).The polyimide can be prepared by reacting 2,6-bis(3-aminophenoxy)pyridine with tetracarboxylic dianhydride in an organic solvent and imidizing resultant polyamic acid.Various tetracarboxylic dianhydrides can be used and particularly prefered are pyromellitic dianhydride and 3,3',4,4'-benzophenonetetracarboxylic dianhydride.Type: GrantFiled: February 6, 1987Date of Patent: January 10, 1989Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Hideaki Oikawa, Masahiro Ohta, Saburo Kawashima, Shoji Tamai, Yoshiho Sonobe, Akihiro Yamaguchi
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Patent number: 4795798Abstract: This invention discloses high-temperature adhesives having a good light-transmittance and excellent high-temperature flowability which comprises polyimide having recurring units represented by the following formula (I) ##STR1## (where R is a tetra-valent radical selected from the group consisting of aliphatic radical having not less than two carbons, cyclo-aliphatic radical, monoaromatic radical, condensed polyaromatic radical, and non condensed polyaromatic radical wherein aromatic radicals are mutually connected with a bond or a crosslinking function).Type: GrantFiled: February 25, 1987Date of Patent: January 3, 1989Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Shoji Tamai, Saburo Kawashima, Masahiro Ohta, Hideaki Oikawa, Kouji Ohkoshi, Akihiro Yamaguchi
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Patent number: 4785074Abstract: Homopolycondensates and copolycondensates of the group comprising linear, saturated polyamides, polyesters, polyamide-imides, polyester-imides and polyester-amides based on benzophenonedicarboxylic acids and benzophenonetricarboxylic acids are radiation-sensitive and are particularly suitable for the production of protective coatings and relief images.Type: GrantFiled: June 22, 1987Date of Patent: November 15, 1988Assignee: Ciba-Geigy CorporationInventor: Josef Pfeifer
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Patent number: 4778872Abstract: Disclosed is an aromatic polyamic acid solution composition comprising an aromatic polyamic acid dissolved in an amount of 5 to 40% by weight in an organic polar solvent. The aromatic polyamic acid is prepared by polymerizing substantially equimolar amounts of an aromatic tetracarboxylic acid component comprising 15 to 85 mole % of a biphenyltetracarboxylic acid or its functional derivative and 15 to 85 mole % of a pyromellitic acid or its functional derivative and an aromatic diamine component comprising 30 to 100 mole % of a phenylenediamine and 0 to 70 mole % of a diaminodiphenyl ether. The aromatic polyamic acid solution composition is formed into an aromatic polyimide film having a relatively small thermal expansion coefficient, high mechanical strength and good flexibility.Type: GrantFiled: November 4, 1985Date of Patent: October 18, 1988Assignee: Ube Industries, Ltd.Inventors: Yoshikazu Sasaki, Hiroshi Inoue
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Patent number: 4769439Abstract: Substantially transparent and flexible polyimide films are provided having reduced T.sub.g 's which result from the intercondensation of bisaminoformals and aromatic bis(anhydrides).Type: GrantFiled: September 29, 1986Date of Patent: September 6, 1988Assignee: General Electric CompanyInventors: John J. Talley, John C. Carpenter
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Patent number: 4769476Abstract: Bis(dialkyl aromatic ether anhydride) is provided which can be melt polymerized with organic diamine to high performance polyetherimide having improved heat distortion temperatures.Type: GrantFiled: November 10, 1986Date of Patent: September 6, 1988Assignee: General Electric CompanyInventor: Paul E. Howson
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Patent number: 4762908Abstract: 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 7, 1987Date of Patent: August 9, 1988Assignee: 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: 4758651Abstract: An amorphous, injection-moldable copolyamide comprising linear chains of each of the units having the formulae:(I) --CO--Ar--CO--,(II) --NH--Ar--CO--, and(III) --NH--Ar--CO--,wherein Ar represents one or more optionally substituted arylene radicals selected from the group consisting of(1) para oriented arylene,(2) meta oriented arylene,(3) arylene-X-arylene, wherein X is --C(Y)(H)--, --O--, --S--, --SO.sub.2 -- or --CO--, with Y is H or C.sub.1-43 -alkyl, and(4) arylene-CZZ'-arylene, wherein Z,Z' are alkyl or cycloalkyl,provided that at least one of the units of the formulae (I), (II) or (III) are arylene radicals from more than one of the groups (1), (2), (3) and (4). Said units are preferably present in a molar ratio of 17-41.5% of (I), 17-41.5% of (II) and 17-66% of (III).Type: GrantFiled: February 27, 1987Date of Patent: July 19, 1988Assignee: Akzo NVInventor: Doetze J. Sikkema
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Patent number: 4757150Abstract: Polyetherimide bisphenols and bischloroformates are prepared by the reaction of dianhydrides or certain bisimides with aminophenols or mixtures thereof with diamines. They are useful as intermediates for the preparation of cyclic heterocarbonates, which may in turn be converted to linear copolycarbonates. The bisphenols can also be converted to salts which react with cyclic polycarbonate oligomers to form block copolyetherimidecarbonates.Type: GrantFiled: July 31, 1986Date of Patent: July 12, 1988Assignee: General Electric CompanyInventors: Thomas L. Guggenheim, Joseph W. Guiles, John W. Verbicky, Jr.
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Patent number: 4755585Abstract: Novel polymers and molding compositions are prepared from acyl halide derivatives of tricarboxylic acids and diamines and about 1 to about 10 percent by weight of phthalic anhydride, trimellitic anhydride or aniline moieties. The polymers are useful in engineering plastics.Type: GrantFiled: July 25, 1986Date of Patent: July 5, 1988Assignee: Amoco CorporationInventors: Robert B. Hanson, Jeffrey D. Felberg, Gary T. Brooks
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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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Patent number: 4746720Abstract: Solvent resistant polyimides are provided having improved T.sub.g by effecting reaction between aromatic bis(anhydride), such as aromatic bis(etheranhydride), and benzofuran amine such as 2-(4-aminophenyl)-5-benzofuranamine.Type: GrantFiled: October 20, 1986Date of Patent: May 24, 1988Assignee: General Electric CompanyInventor: Donald R. Berdahl
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Patent number: 4736015Abstract: Aromatic polyimide compositions, useful in particular for manufacturing adhesive materials, varnishes and films withstanding high temperatures, having a high solubility in organic solvents, particularly polar solvents and which are manufactured by reacting, in such a solvent, a tetraester or diacid-diester of benzhydrol 3,3', 4, 4' tetracarboxylic acid with an aromatic diamine for a sufficient time to obtain a polycondensation reaction product having an inherent viscosity at 30.degree. C., at a concentration of 5 g/liter in N-methyl pyrrolidone, ranging from 0.1 to 2 dl/g.Type: GrantFiled: October 19, 1982Date of Patent: April 5, 1988Assignee: Institut Francais du PetroleInventors: Guy Rabilloud, Michel Senneron, Choua Cohen, Paul Mariaggi, Bernard Sillion
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Patent number: 4734482Abstract: This invention relates to a novel polyimide and describes the method of its preparation, adhesives of the polyimide and the method for their application.The polyimide has recurring units of the formula ##STR1## (where Y is ##STR2## and R is a tetra-valent radical selected from the group consisting of aliphatic radicals having not less than two carbons, cyclo-aliphatic radical, monoaromatic radical, condensed polyaromatic radical, and non condensed polyaromatic radical wherein aromatic radicals are mutually connected with a bond or a crosslinking function).Type: GrantFiled: December 23, 1986Date of Patent: March 29, 1988Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Shoji Tamai, Saburo Kawashima, Yoshiho Sonobe, Masahiro Ohta, Hideaki Oikawa, Akihiro Yamaguchi
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Patent number: 4728697Abstract: Carboxy-terminated prepolymers are prepared by the reaction of a diamine, preferably an aromatic diamine, or a mixture thereof with a triamine, with a carboxy anhydride such as trimellitic anhydride and a dianhydride such as bisphenol A dianhydride. The prepolymers, or functional derivatives thereof, are then reacted with a diisocyanate or diamine, or a mixture thereof with a triisocyanate or triamine, preferably an aromatic diisocyanate, to produce copolyamideimides. The products prepared using triamines or triisocyanates are crosslinked. Other products containing alkyl or alicyclic groups attached to aromatic radicals can be oxidatively crosslinked, e.g., by heating in air.Type: GrantFiled: September 27, 1985Date of Patent: March 1, 1988Assignee: General Electric CompanyInventors: Donald A. Bolon, Thomas B. Gorczyca
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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: 4725642Abstract: Melt-fusible copolyimides based on pyromellitic anhydride and two defined classes of aromatic diamines, at least one diamine of each class being incorporated into the polyimide, each diamine class being present in an amount of 10-90 mole percent of the total diamine content (100 mole percent), melt below about 400.degree. C. and can be fabricated into articles, or can be applied to either fibrous or nonfibrous substrates to make prepregs, tapes, etc., which then are shaped into final articles, such as printed circuit boards or aircraft panels.Type: GrantFiled: April 29, 1985Date of Patent: February 16, 1988Assignee: E. I. Du Pont de Nemours and CompanyInventors: Thomas P. Gannett, Robert J. Kassal, Rolland S. Ro, Julius Uradnisheck
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Injection moldable polymer comprising phthalic anhydride, aniline and trimellitic anhydride moieties
Patent number: 4722992Abstract: Novel polymers and molding compositions are prepared from acyl halide derivatives of tricarboxylic acids and diamines and about 1 to about 10 percent by weight of phthalic anhydride, or trimellitic anhydride or aniline moieties. The polymers are useful in engineering plastics.Type: GrantFiled: June 10, 1985Date of Patent: February 2, 1988Assignee: Standard Oil CompanyInventor: Robert B. Hanson -
Patent number: 4719281Abstract: This invention provides novel polymers which are characterized by a recurring structural unit that contains a pendant quinoid structure and that exhibits nonlinear optical response.The following structure is illustrative of an invention polymer: ##STR1## where m is an integer of at least 3.Type: GrantFiled: April 21, 1986Date of Patent: January 12, 1988Assignee: Hoechst Celanese CorporationInventor: Eui W. Choe
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Patent number: 4709004Abstract: Nitro-isopropenyldiphenyl ethers are provided which can serve as a useful source of known monomer intermediates or as intermediates for the preparation of nitro-haloisopropyl substituted diphenyl ethers. The latter have been discovered to act as facile alkylating agents with phenols providing nitro-p-hydroxyphenylisopropyl substituted diphenyl ethers. When the latter compounds are reduced there are obtained the corresponding amino-p-hydroxyphenylisopropyl substituted diphenyl ethers.The polymerization of this last class of compounds with acid halides provides polyamide-esters. The polymers can be used in the manufacture of such articles as tubing, hose, bellows hose, and the like.Type: GrantFiled: June 30, 1986Date of Patent: November 24, 1987Assignee: The Dow Chemical CompanyInventor: Shenghong A. Dai
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Patent number: 4689391Abstract: A process for making polyetherimides involving reacting an aromatic bis(ether anhydride) with an organic diamine in the presence of a solvent so as to form a polyamide acid. The polyamide acid is thereafter polymerized in a solid state at a temperature below the glass transition temperature of the final polyetherimide.Type: GrantFiled: December 21, 1984Date of Patent: August 25, 1987Assignee: General Electric CompanyInventors: Edward N. Peters, Daniel W. Fox
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Patent number: 4681928Abstract: Aromatic or aliphatic dianhydrides and/or acid anhydrides are reacted with certain aromatic diamines alone or in combination with other diamines to produce polyimides, polyamide acids, poly(amide-imides), poly(amide-amide acids), poly(esterimides) or poly(esteramide acids). These polymers are thermoplastic in nature and have improved processing characteristics and thermal stability. The polymers may be prepared by either melt or solution polymerization techniques.Type: GrantFiled: June 1, 1984Date of Patent: July 21, 1987Assignee: M&T Chemicals Inc.Inventors: Abe Berger, Rohitkumar H. Vora
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Patent number: 4680373Abstract: The present invention provides a process for the production of random copolymers containing repeating polyimide units and repeating polyetherimide units. The process is a reverse addition process and utilizes at least two dianhydrides of varying reactivity.Type: GrantFiled: May 27, 1986Date of Patent: July 14, 1987Assignee: General Electric CompanyInventors: Patrick E. Gallagher, Ronald A. Greenberg
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Patent number: 4675376Abstract: A copolymer prepared from a bis-(N-alkyphthalimide), a dianhydride and a diamine, and a process of preparing the copolymer by reacting a bis-(n-alkyphthalimide) with an alkali to form a tetracid, dehydrating the tetracid to a dianhydride and reacting the dianhydride with a diamine under copolymer forming conditions.Type: GrantFiled: October 17, 1986Date of Patent: June 23, 1987Assignee: General Electric CompanyInventor: Edward N. Peters
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Patent number: 4650850Abstract: Bis(dialkyl aromatic ether anhydride) is provided which can be melt polymerized with organic diamine to high performance polyetherimide having improved heat distortion temperatures.Type: GrantFiled: September 27, 1985Date of Patent: March 17, 1987Assignee: General Electric CompanyInventor: Paul E. Howson
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Patent number: 4629777Abstract: Homopolyimides and copolyimides of aromatic tetracarboxylic acids and aromatic diamines which are substituted in the two ortho-positions relative to at least one N atom by alkyl, alkoxy, alkoxyalkyl, cycloalkyl or aralkyl, are soluble in organic solvents and have increased glass transition temperatures and hence very good heat stabilities. Such polyimides, which contain radicals of a benzophenonetetracarboxylic acid, are radiation-sensitive and autophotocrosslinkable. The polyimides are suitable for the production of films, protective coatings and photographic relief images.Type: GrantFiled: May 10, 1984Date of Patent: December 16, 1986Assignee: Ciba-Geigy CorporationInventor: Josef Pfeifer
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Patent number: 4623732Abstract: Compounds which are bis-(N-alkylphthalimides) are prepared by a new process in which a halogen-containing precursor is heated in the presence of a nickel compound, a reducing agent, for example, metallic zinc, and an organic solvent. The resulting compound is useful in a process for the preparation of a copolymer, in which the compound is reacted with alkali to form a tetraacid, the acid is dehydrated to form a dianhydride, and the dianhydride is reacted with a second dianhydride and a diamine under copolymer-forming conditions.Type: GrantFiled: November 18, 1983Date of Patent: November 18, 1986Assignee: General Electric CompanyInventor: Edward N. Peters
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Patent number: 4622285Abstract: Oligomeric and/or polymeric polyoxazole and polythiazole precursors can be prepared with high purity, i.e., especially without chloride, in a simple manner if an aromatic and/or heterocyclic dihydroxy, dialkoxy or diaryloxydiamino compound or a corresponding dithio compound is reacted with a dicarboxylic acid in the presence of a carbodiimide. The precursors prepared in this manner are suitable, for instance, for the manufacture of protection and insulating layers.Type: GrantFiled: March 27, 1985Date of Patent: November 11, 1986Assignee: Siemens AktiengesellschaftInventor: Hellmut Ahne
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Patent number: 4613637Abstract: A copolymer formed from an isoimide oligomer and another compound, such as an aryl sulfone, each of which has reactive functional terminal groups, such as ethylenic or acetylenic groups. The isoimide oligomer is soluble in the other compound, unreactive with the compound below a certain temperature and forms a liquid blend therewith. Upon heating the liquid blend above that certain temperature, the terminal groups on the isoimide oligomer and the other compound react with each other to form a copolymer. The liquid blends may be used to form encapsulants, coatings, films, and resin matrices for composites to provide resins with excellent high temperature properties.Type: GrantFiled: December 27, 1983Date of Patent: September 23, 1986Assignee: Hughes Aircraft CompanyInventors: Abraham L. Landis, Arthur B. Naselow
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Patent number: 4612361Abstract: Novel fluoro-containing polyetherimides are prepared from bis ether dianhydrides, fluoro-containing dianhydrides, and organic diamines. The compolymers exhibit both increased Tg and increased solubility in halogenated solvents which enhances their value in a wide variety of uses including films, molding compounds, and coatings.Type: GrantFiled: September 23, 1985Date of Patent: September 16, 1986Assignee: General Electric CompanyInventor: Edward N. Peters
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Patent number: 4611048Abstract: Polyetherimide oligomers are end functionalized with aryl hydroxy groups by reacting mixtures of bisphenol-A dianhydride, arylene diamines and aryl aminoalcohols. The oligomers are reactive with other polymer precursors, such as bisphenol-A and phosgene to provide segmented block copolymers of improved toughness and compatibility with other resins.Type: GrantFiled: October 4, 1985Date of Patent: September 9, 1986Assignee: General Electric CompanyInventor: Edward N. Peters
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Patent number: 4609702Abstract: Ether modified polyesterimide resins are prepared by reacting under esterimide forming conditions substantially free of inert solvents a mixture consisting essentially of:(i) a diamine,(ii) a carboxylic acid anhydride containing at least one additional carboxylic group,(iii) an aromatic bis (ether anhydride) or the corresponding acid thereof,(iv) terephthalic acid and/or isophthalic acid,(v) a polyhydric alcohol having at least two hydroxyl groups, and(vi) optionally, a monoether of diethylene glycol or a monoether of triethylene glycol.Type: GrantFiled: October 22, 1985Date of Patent: September 2, 1986Assignee: General Electric CompanyInventor: Otto S. Zamek
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Patent number: 4608427Abstract: An improved process for preparing polybenzobisthiazoles and polybenzobisoxazoles involves reacting diethyl, di-n-propyl, diisopropyl or diisobutyl terephthalate rather than terephthalic acid with the appropriate dihydrochloride.Type: GrantFiled: June 20, 1985Date of Patent: August 26, 1986Assignee: E. I. Du Pont de Nemours and CompanyInventors: Wilfred Sweeny, Stephanie L. Kwolek
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Patent number: 4606875Abstract: Shaped articles are prepared from rigid rod heterocyclic liquid crystalline polymers. The articles are prepared by polymerizing the polymer in a reaction medium whereby a solution of the polymer is formed and by forming the articles directly from the polymer solution.Type: GrantFiled: April 11, 1983Date of Patent: August 19, 1986Assignee: Celanese CorporationInventors: Edward C. Chenevey, Thaddeus E. Helminiak
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Patent number: 4599396Abstract: Crystalline polyetherimides having equilibrium melting points below 400.degree. C. are obtained by the reaction of various p-linked polycyclic tetracarboxylic acids or their functional derivatives with p-linked polycyclic diamines. The structural units in said crystalline polyetherimides contain at least 7 aromatic rings.Type: GrantFiled: September 4, 1984Date of Patent: July 8, 1986Assignee: General Electric CompanyInventors: Tohru Takekoshi, Patricia P. Anderson
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Patent number: 4588804Abstract: A soluble polyimide derived from dehydration of a polyamic acid which is the liquid phase condensation reaction product of a solution in aprotic solvent of approximately equimolar amounts of aromatic dianhydride and aromatic diamine. At least 50 mole % of the dianhydride must have ring linkages which prevent conjugation between the rings and at least 20 mole % of the diamine must contain electron withdrawing groups.Type: GrantFiled: May 4, 1984Date of Patent: May 13, 1986Assignee: E. I. Du Pont de Nemours and CompanyInventor: Michael Fryd