Polymerizing In The Presence Of A Specified Material Other Than A Reactant And Other Than Group Ia Or Group Iia Material As Sole Metal Atom Patents (Class 528/207)
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Patent number: 4520168Abstract: Color improved polyarylates having a reduced viscosity of from about 0.1 to greater than 1.0 dl/gm produced by a process comprising the following steps:(a) reacting an acid anhydride derived from an acid containing from 2 to 8 carbon atoms with at least one dihydric phenol to form the corresponding diester; and(b) reacting said diester with at least one aromatic dicarboxylic acid at a temperature sufficient to form the polyarylate, wherein the improvement comprises carrying out said process in the presence of a particular solid adsorbent.Type: GrantFiled: March 27, 1984Date of Patent: May 28, 1985Assignee: Union Carbide CorporationInventors: James H. Kawakami, Benito See, Thomas R. Jones, Louis M. Maresca
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Patent number: 4511709Abstract: High molecular weight block copolyamides useful in the production of fibers of high strength and modulus, having the following formula: ##STR1## wherein X is --CH.sub.2 --.sub.m, wherein m is 0 to 12, ##STR2## wherein Z is C(CH.sub.3).sub.2, zero, oxygen or SO.sub.2, are prepared from N,N'-bis(4-aminophenyl) terephthalamide having the formula: ##STR3## which is itself prepared by condensing aniline with dimethyl terephthalate or terephthalic acid, nitrating the product produced thereby and finally hydrogenating the resultant compound.Type: GrantFiled: February 15, 1983Date of Patent: April 16, 1985Assignee: Korea Advanced Institute of Science and TechnologyInventors: Hans S. Yoon, Wha S. Lee
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Patent number: 4510295Abstract: Absorbable, radiation sterilizable polymers, useful as sutures and other medical and surgical devices, are produced from polyesters of substituted benzoic acid, dihydric alcohols, and glycolide and/or lactide.Type: GrantFiled: January 20, 1983Date of Patent: April 9, 1985Assignee: Ethicon, Inc.Inventors: Rao S. Bezwada, Shalaby W. Shalaby, Dennis D. Jamiolkowski
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Patent number: 4506068Abstract: This invention provides a two stage melt polymerization process for the production of an improved type of high molecular weight polybenzimidazole, which involves the use of an arylphosphine or arylphosphite polymerization catalyst.The process provides poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole of improved color and Plugging Value, and is further characterized by an inherent viscosity of at least about 0.9 dl/g, and a weight average molecular weight of at least about 140,000.Type: GrantFiled: February 2, 1984Date of Patent: March 19, 1985Assignee: Celanese CorporationInventors: Eui W. Choe, Anthony B. Conciatori, Bennett C. Ward
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Patent number: 4485232Abstract: This invention provides a two stage melt polymerization process for the production of an improved type of high molecular weight polybenzimidazole, which involves the use of an arylphosphinic acid or arylphosphonic acid polymerization catalyst.The process provides poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole of improved color and plugging value, and is further characterized by an inherent viscosity of at least about 0.7 dl/g, and a weight average molecular weight of at least about 100,000.Type: GrantFiled: October 18, 1983Date of Patent: November 27, 1984Assignee: Celanese CorporationInventors: Eui W. Choe, Anthony B. Conciatori
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Patent number: 4474932Abstract: Aromatic ethers or polyethers are produced by reacting aromatic fluorine compounds, in which one or more fluorine substituents are attached to an aromatic nucleus, with trialkyl silyl derivatives of phenols, in which one or more trialkyl silyl groups are attached to the residue of a mono- or polyphenol, or by reacting trialkyl silyl derivatives of fluorophenols with elimination of trialkylfluorosilane.Type: GrantFiled: March 16, 1983Date of Patent: October 2, 1984Assignee: Bayer AktiengesellschaftInventors: Gerhard Bier, Hans R. Kricheldorf
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Polyamide acid composition for preparing polyimide and process for preparing polyimide from the same
Patent number: 4454276Abstract: A polyamide acid composition for preparing a polyimide which can extend the pot life of the composition comprising a solution of a polyamide acid in an organic solvent, the polyamide acid being a precursor of the polyimide, a dehydrating agent, a catalyst and a pot life extending agent which can lower a rate of conversion of the polyamide acid to the polyimide, and the process for preparing the polyimide from said polyamide acid composition. According to the present invention the pot life can be extremely extended to give the composition an enough flowability for a long time without reducing the excellent properties such as a heat resistance and an electric insulation of the obtained polyimide.Type: GrantFiled: September 29, 1982Date of Patent: June 12, 1984Assignee: Kanegafuchi Chkagaku Kogyo Kabushiki KaishaInventors: Junji Uda, Tsuneo Yamamoto, Takumi Kosugi -
Patent number: 4452967Abstract: This invention provides a single stage melt polymerization process for the production of an improved type of high molecular weight polybenzimidazole, which involves the use of a phosphorus-containing polymerization catalyst.The process provides poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole of improved color and plugging value, and is further characterized by an inherent viscosity of at least about 0.7 dl/g, and a weight average molecular weight of at least about 100,000.Type: GrantFiled: June 21, 1983Date of Patent: June 5, 1984Assignee: Celanese CorporationInventors: Anthony B. Conciatori, Eui W. Choe, Henry K. Hall, Jr.
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Patent number: 4452971Abstract: This invention provides a single stage melt polymerization process for the production of an improved type of high molecular weight polybenzimidazole, which involves the use of a tin-containing polymerization catalyst.The process provides poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole of improved color and Plugging Value, and is further characterized by an Inherent Viscosity of at least about 0.5 dl/g, and a weight average molecular weight of at least about 100,000.Type: GrantFiled: July 19, 1982Date of Patent: June 5, 1984Assignee: Celanese CorporationInventors: Eui W. Choe, Anthony B. Conciatori
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Patent number: 4448955Abstract: This invention provides a single stage melt polymerization process for the production of an improved type of high molecular weight polybenzimidazole, which involves the use of a tin-containing polymerization catalyst.The process provides poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole of improved color and Plugging Value, and is further characterized by an Inherent Viscosity of at least about 0.5 dl/g, and a weight average molecular weight of at least about 100,000.Type: GrantFiled: April 7, 1983Date of Patent: May 15, 1984Assignee: Celanese CorporationInventors: Eui W. Choe, Anthony B. Conciatori
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Patent number: 4448954Abstract: This invention provides a single stage melt polymerization process for the production of an improved type of high molecular weight polybenzimidazole, which involves the use of an organosilicon halide polymerization catalyst.The process provides poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole of improved color and Plugging Value, and is further characterized by an Inherent Viscosity of at least about 0.7 dl/g, and a weight average molecular weight of at least about 100,000.Type: GrantFiled: April 7, 1983Date of Patent: May 15, 1984Assignee: Celanese CorporationInventors: Eui W. Choe, Anthony B. Conciatori
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Patent number: 4448957Abstract: In a process for producing an aromatic polyamide-imide by polycondensation of an aromatic tricarboxylic acid and/or aromatic tricarboxylic anhydride and an aromatic diamine with heating in the presence of a dehydration catalyst, the improvement which comprises using a solvent containing sulfolane as a reaction medium.Type: GrantFiled: April 13, 1983Date of Patent: May 15, 1984Assignee: Sumitomo Chemical Company, LimitedInventors: Katsuji Ueno, Kenji Nagaoka
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Patent number: 4439586Abstract: An improved process for preparing a polyarylate having a reduced viscosity of from about 0.1 to greater than 1.0 dl/gm comprising the following steps:(a) reacting an acid anhydride derived from an acid containing from 2 to 8 carbon atoms with at least one dihydric phenol to form the corresponding diester; and(b) reacting said diester with at least one aromatic dicarboxylic acid at a temperature sufficient to form the polyarylate, wherein the improvement comprises carrying out said process in the presence of a particular solid adsorbent.Type: GrantFiled: June 30, 1982Date of Patent: March 27, 1984Assignee: Union Carbide CorporationInventors: James H. Kawakami, Benito See, Thomas R. Jones, Louis M. Maresca
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Patent number: 4431796Abstract: This invention provides a single stage melt polymerization process for the production of an improved type of high molecular weight polybenzimidazole, which involves the use of an organosilicon halide polymerization catalyst.The process provides poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole of improved color and Plugging Value, and is further characterized by an Inherent Viscosity of at least about 0.7 dl/g, and a weight average molecular weight of at least about 100,000.Type: GrantFiled: August 17, 1982Date of Patent: February 14, 1984Assignee: Celanese CorporationInventors: Eui W. Choe, Anthony B. Conciatori
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Patent number: 4429105Abstract: Provided is a method for preparing aromatic copolyesters of hydroxy naphthoic acid and hydroxy benzoic acid via an in situ esterification technique whereby there is no isolation of the esterified monomers. The process comprises reacting the aromatic hydroxy acid monomers with an agent such as acetic anhydride in order to esterify the hydroxy moieties and subsequently polymerizing the esterified hydroxy monomers without isolation thereof, all in the presence of from about 5 to 50 ppm iron. Advantageously, the process allows one to obtain a wholly aromatic polyester of high inherent viscosity and good melt stability while avoiding the time consuming step of having to isolate the esterified hydroxy monomers prior to polymerization.Type: GrantFiled: February 22, 1983Date of Patent: January 31, 1984Assignee: Celanese CorporationInventor: Larry F. Charbonneau
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Patent number: 4423202Abstract: A process for the production of para ordered aromatic heterocyclic polymer is provided. The process comprises heating a first reactant with the dichloride derivative of at least one aromatic dicarboxylic acid in polyphosphoric acid at a temperature within the range of approximately 100.degree. C. to 250.degree. C. until the polymerization reaction is complete. The first reactant comprises at least one aromatic diaminodiol or at least one aromatic diaminodithiol, wherein each amine group is paired with a hydroxy group or a thiol group upon adjacent carbon atoms of the aromatic nucleus. Preferably, the process of the present invention is employed in the production of para ordered aromatic polybisoxazoles wherein the first reactant comprises at least one aromatic diaminodiol.Type: GrantFiled: May 5, 1981Date of Patent: December 27, 1983Assignee: Celanese CorporationInventor: Eui W. Choe
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Patent number: 4417044Abstract: A process for making polyetherimides involving reacting an aromatic bis(ether anhydride) with an organic diamine in an inert solvent to form a prepolymer solvent mixture, effecting solvent removal by thin-film evaporation, and heating the resulting prepolymer to a temperature above the glass transition temperature of the final polyetherimide product and less than 450.degree. C. to form the polyetherimide.Type: GrantFiled: May 25, 1982Date of Patent: November 22, 1983Assignee: General Electric CompanyInventor: Shashi L. Parekh
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Patent number: 4414383Abstract: This invention provides a single stage melt polymerization process for the production of an improved type of high molecular weight polybenzimidazole, which involves the use of a phosphorus-containing polymerization catalyst.The process provides poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole of improved color and plugging value, and is further characterized by an inherent viscosity of at least about 0.7 dl/g, and a weight average molecular weight of at least about 100,000.Type: GrantFiled: May 24, 1982Date of Patent: November 8, 1983Assignee: Celanese CorporationInventors: Anthony B. Conciatori, Eui W. Choe, Henry K. Hall, Jr.
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Patent number: 4408035Abstract: Phthalonitrile resins useful as high-temperature coatings and plastics and n high-temperature composites are obtained by heating a diphthalonitrile monomer with a primary amine from a temperature from about the melting point of the monomer to about the decomposition temperature of the resin. The resins can also be prepared by dissolving a diphthalonitrile monomer in a solvent, e.g. acetonitrile, adding a primary amine to form a suspension, heating the suspension to the B-stage, quenching the suspension, removing the solvent, and heating the residue at a temperature from about its melting point to about the decomposition temperature of the resin.Type: GrantFiled: August 24, 1981Date of Patent: October 4, 1983Assignee: The United States of America as represented by the Secretary of the NavyInventor: Teddy M. Keller
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Patent number: 4398020Abstract: Production of an aromatic polyketone by reacting in the presence of a fluoroalkane sulphonic acid the reactants selected from: (a) a mixture of (i) at least one aromatic diacyl halide WOC--Ar--COW where --Ar'-- is a divalent aromatic radical, W is halogen and COW is an aromatically bound acyl halide group, which diacyl halide is polymerizable with the at least one aromatic compound of (ii), and (ii) at least one aromatic compound H--Ar'--H where --Ar'-- is a divalent aromatic radical and H is an aromatically bound hydrogen atom, which compound is polymerizable with the at least one diacyl halide of (i); (b) at least one aromatic monoacyl halide H--Ar"--COW where --Ar"-- is a divalent aromatic radical and H, W, and COW are as defined in (a), which monoacyl halide is self-polymerizable; and (c) a combination of (a) and (b).Type: GrantFiled: April 12, 1982Date of Patent: August 9, 1983Assignee: Imperial Chemical Industries PLCInventor: John B. Rose
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Patent number: 4396755Abstract: Production of an aromatic polyketone by reacting in the presence of a quinquevalent phosphorous halide (preferably PCl.sub.5) and a fluoroalkane sulphonic acid (preferably CF.sub.3 SO.sub.2 OH) the reactants selected from: (a) a mixture of (i) at least one aromatic dicarboxylic acid HO.sub.2 C--Ar--CO.sub.2 H where --Ar'-- is a divalent aromatic radical and CO.sub.2 H is an aromatically bound carboxylic acid group, which dicarboxylic acid is polymerizable with the at least one aromatic compound of (ii), and (ii) at least one aromatic compound H--Ar'--H where --Ar'-- is a divalent aromatic radical and H is an aromatically bound hydrogen atom, which compound is polymerizable with the at least one dicarboxylic acid of (i); (b) at least one aromatic monocarboxylic acid H--Ar"--CO.sub.2 H where --Ar"-- is a divalent aromatic radical and H and CO.sub.2 H are as defined in (a), which monocarboxylic acid is self-polymerizable; and (c) a combination of (a) and (b).Type: GrantFiled: April 12, 1982Date of Patent: August 2, 1983Assignee: Imperial Chemical Industries PLCInventor: John B. Rose
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Patent number: 4395536Abstract: Provided is a method for preparing aromatic copolyesters involving in situ esterification with an isopropenyl ester of an alkyl acid, e.g., isopropenyl acetate. The process comprises reacting the aromatic hydroxy monomers with an isopropenyl ester of an alkyl acid such as isopropenyl acetate in a polymerization vessel in order to esterify the hydroxy moieties, and then polymerizing the esterified hydroxy monomers with aromatic carboxylic acid monomers in the resultant esterification reaction medium to form the aromatic copolyester. Both the esterification and polymerization reactions can be effectively conducted in the same vessel without having to separate out and/or transfer the esterification products from a separate vessel as the polyester polymerization is conducted in the esterification reaction mixture.Type: GrantFiled: November 17, 1981Date of Patent: July 26, 1983Assignee: Celanese CorporationInventor: Larry F. Charbonneau
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Patent number: 4393191Abstract: Provided is a method for preparing melt-processable polyesters efficiently via the direct polymerization of aromatic hydroxy acids. By the direct polymerization method, hydroxy and acid moieties are reacted directly without the use of acetylated reactants, thereby avoiding the disadvantages inherent in the case of acetylated reactants. The direct polymerization is conducted in the presence of a catalyst comprising a metal selected from the group consisting of the Group IV and V metals.Type: GrantFiled: March 8, 1982Date of Patent: July 12, 1983Assignee: Celanese CorporationInventor: Anthony J. East
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Patent number: 4387210Abstract: An aromatic polyester amide is produced by reacting hydroxyphenyl-aminophenyl-propane with aromatic dicarboxylic acid dihalide in the presence of an inert organic solvent, and bringing the organic solvent phase containing the mixture of the reaction products of the above reaction into contact with an aqueous phase containing an acid-acceptor, whereby completing polycondensation reaction. In order to control the dissolution of water into the organic solvent phase while maintaining an adequate level of miscibility between the organic solvent phase and the aqueous phase, a neutral salt of inorganic electrolyte, such as sodium chloride, is added to the aqueous phase containing the acid-acceptor.Type: GrantFiled: December 22, 1981Date of Patent: June 7, 1983Assignee: Mitsui Toatsu Chemical, Inc.Inventors: Nobukatsu Katoh, Yoshio Morimoto, Takashi Kataoka, Teruo Yuasa
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Patent number: 4374239Abstract: Described herein is a process for preparing polyarylates which comprises reacting a diester derivative of a dihydric phenol with an aromatic dicarboxylic acid in the presence of from about 10 to about 60 weight percent of at least one particular halogenated and/or etherated substituted aromatic or heteroaromatic compound, at a temperature of from about 260.degree. to about 350.degree. C.Type: GrantFiled: August 18, 1981Date of Patent: February 15, 1983Assignee: Union Carbide CorporationInventors: Mitchell H. Berger, Louis M. Maresca, Ulrich A. Steiner
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Patent number: 4361693Abstract: Poly(arylene ketones) are prepared by the reaction of difunctional aromatic compounds with derivatives of thio- or dithiocarbonic acids in the presence of a superacid catalyst system. In a preferred embodiment, diphenyl ether reacts with S-methyl chlorothioformate in HF/BF.sub.3 to produce poly(p-phenyleneoxy-p-phenylene carbonyl), i.e.Type: GrantFiled: July 8, 1981Date of Patent: November 30, 1982Assignee: Raychem CorporationInventor: Viktors Jansons
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Patent number: 4359567Abstract: Articulated p-benzobisoxazole and p-benzobisthiazole polymers which contain a limited number of 3,3'-biphenyl or 2,2'-bipyridyl segments are synthesized, with inherent viscosities as high as 14 dl/g being recorded. The 3,3'-biphenyl or 2,2'-bipyridyl segments in the p-benzobisoxazole and p-benzobisthiazole polymers impart flexibility to the polymers without adversely affecting the thermooxidative stability. While the resultant articulated polymers exhibit liquid crystalline behavior in methanesulfonic acid and form strong cast films from that solvent, they also exhibit thermooxidative stability comparable to other p-benzobisthiazole and p-benzobisoxazole polymers. The resultant films are useful for the fabrication of high strength laminates to be used in severe environment structural applications.Type: GrantFiled: October 2, 1981Date of Patent: November 16, 1982Assignee: The United States of America as represented by the Secretary of the Air ForceInventor: Robert C. Evers
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Patent number: 4354018Abstract: A resinous linear polyester, poly(oxy-1,4-phenylene-3-oxotrimethylene), is made by the self-condensation of 3-(parahydroxyphenyl)propionic acid. The process is carried out interfacially or in an inert solvent by mixing 3-(parahydroxyphenyl)propionic acid with at least an equimolar proportion of thionyl chloride and maintaining the mixture at a reaction temperature for a time sufficient to allow substantially complete autocondensation. A base may be added in proportion at least about equivalent to the thionyl chloride. The autocondensate when purified is a white solid linear polyester not melting up to 360.degree. C. and may exhibit an intrinsic viscosity of at least 75 ml/g. It may be molded or pressed into a film.Co-condensed polyesters of 3-(parahydroxyphenyl)propionic acid with up to an equimolar proportion of parahydroxyphenylacetic acid may similarly be prepared.Type: GrantFiled: February 1, 1982Date of Patent: October 12, 1982Assignee: Michigan Molecular InstituteInventors: Hans-G. Elias, Robert J. Warner
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Patent number: 4354017Abstract: A process for the production of polyquinazolone-based polymers by reacting bisquinazolone with a diamine or a diamine substituted with a carboxylic acid, sulfonic acid or metal salt thereof in the presence of a Lewis acid catalyst or a phosphorus-containing dehydrating agent, where the polymers are useful to produce permselective membranes.Type: GrantFiled: June 25, 1981Date of Patent: October 12, 1982Assignee: Nitto Electric Industrial Co., Ltd.Inventors: Masao Abe, Hisashi Ichinose, Yuzuru Noda
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Patent number: 4332708Abstract: Wire coating formulations are provided by heating a mixture of aromatic dianhydride, water and a monoalkyl glycol ether, followed by the addition of organic diamine. The resulting mixture is a stable wire coating enamel capable of forming flexible wire enamels upon cure.Type: GrantFiled: February 27, 1980Date of Patent: June 1, 1982Assignee: General Electric CompanyInventors: Edith M. Boldebuck, Eugene G. Banucci
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Patent number: 4330666Abstract: A method is provided for making polyetherimides based on the use of certain amphoteric catalysts such as hydroxy pyridines or aminocarboxylic acids to accelerate the intercondensation of aromatic bis(ether anhydride) and organic diamine or prepolymer thereof under solution or melt polymerization conditions.Type: GrantFiled: September 19, 1980Date of Patent: May 18, 1982Assignee: General Electric CompanyInventors: Dwain M. White, David G. Keyes
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Patent number: 4330668Abstract: In the production of an aromatic polyester by reacting at least one aromatic diester of the formula ##STR1## wherein R is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or a cycloalkyl group having 3 to 8 carbon atoms; andAr.sub.2 is an arylene group,with at least one aromatic dicarboxylic acid of the formula ##STR2## wherein Ar.sub.2 is an arylene group,in the presence of a catalyst, the improvement which comprises employing a transition metal salt of naphthenic acid as the catalyst.Type: GrantFiled: May 16, 1980Date of Patent: May 18, 1982Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Sato Hideo, Takiguchi Teruo, Akimoto Norio, Ueno Ikuo
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Patent number: 4324884Abstract: A method is provided for making polyetherimides, based on the use of certain organic diamine catalysts, for example, 4-dimethylaminopyridine and secondary or tertiary aliphatic diamines, to accelerate the intercondensation of aromatic bis(ether anhydride) and organic diamine under solution or melt polymerization conditions. The resulting polyetherimides are high performance injection moldable thermoplastics.Type: GrantFiled: September 25, 1980Date of Patent: April 13, 1982Assignee: General Electric CompanyInventors: Dwain M. White, David G. Keyes
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Patent number: 4324885Abstract: A method is provided for making polyetherimides, based on the use of certain quaternary Group VA salts, for example tetra-alkylammonium halides, to accelerate the intercondensation of aromatic bis(ether anhydride) and organic diamine under solution or melt polymerization conditions. The resulting polyetherimides are high performance, injection moldable thermoplastics.Type: GrantFiled: September 25, 1980Date of Patent: April 13, 1982Assignee: General Electric CompanyInventors: Dwain M. White, David G. Keyes
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Patent number: 4324883Abstract: A method is provided for making polyetherimide based on the use of an organic carboxylic acid or phenolic catalyst which is added in a controlled manner to a solution polymerization mixture of an organic dianhydride and organic diamine. An enhancement of the rate of polymerization is achieved if the catalyst addition is effected after at least a predetermined amount of water of reaction is separated from the mixture.Type: GrantFiled: September 19, 1980Date of Patent: April 13, 1982Assignee: General Electric CompanyInventors: Dwain M. White, David G. Keyes
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Patent number: 4314051Abstract: Described herein is a process for preparing crystalline polyarylates which comprises (a) forming a crystalline polyarylate prepolymer having a reduced viscosity of from 0.05 to about 0.4 dl/g by reacting at least one diester derivative of a dihydric phenol with at least one aromatic dicarboxylic acid in the presence of a solvent, at a temperature of from about 250.degree. to about 300.degree. C., and (b) heating the prepolymer so formed below its melting point to form a crystalline polyarylate having a reduced viscosity of from about 0.45 to about 1.2 dl/g.Type: GrantFiled: May 5, 1980Date of Patent: February 2, 1982Assignee: Union Carbide CorporationInventors: Mitchell H. Berger, Markus Matzner, James M. Tibbitt
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Patent number: 4298519Abstract: A thermocurable composition based on an ethylenically unsaturated ester such as 2,2-bis-(p-.beta.-hydroxyethoxy)phenyl propane dimethacrylate and containing 2 to 60% by weight (calculated on the ethylenically unsaturated ester) of a chlorine-containing paraffin having an average molecular weight of 250 to 900 and an average chlorine content of 35 to 75% by weight.Type: GrantFiled: May 30, 1978Date of Patent: November 3, 1981Assignee: Akzo N.V.Inventors: Johan H. Cordes, Wilhelmus F. M. Roes
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Patent number: 4296232Abstract: Described herein is a process for preparing polyarylates which comprises reacting a diester derivative of a dihydric phenol with an aromatic dicarboxylic acid in the presence of from about 10 to about 60 weight percent of a diphenyl ether compound at a temperature of from about 260.degree. to about 350.degree. C. and in the presence of a magnesium catalyst.Type: GrantFiled: August 27, 1979Date of Patent: October 20, 1981Assignee: Union Carbide CorporationInventors: Louis M. Maresca, Peter J. Gill, Mitchell H. Berger
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Patent number: 4294957Abstract: Described herein is a process for preparing polyarylates of improved color which comprises reacting a diester derivative of a dihydric phenol with an aromatic dicarboxylic acid in the presence of from about 10 to about 60 weight percent of at least one cycloaliphatic, substituted aromatic or heteroaromatic compound, which compounds contain at least one benzylic and/or tertiary hydrogen atom, at a temperature of from about 260.degree. to about 350.degree. C. Optionally, the process may be carried out in the presence of a magnesium, manganese, or zinc catalyst.Type: GrantFiled: August 27, 1979Date of Patent: October 13, 1981Assignee: Union Carbide CorporationInventors: Mitchell H. Berger, Louis M. Maresca, Markus Matzner
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Patent number: 4294956Abstract: Described herein is a process for preparing polyarylates which comprises reacting a diester derivative of a dihydric phenol with an aromatic dicarboxylic acid in the presence of from about 10 to about 60 weight percent of a diphenyl ether compound at a temperature of from about 260.degree. to about 350.degree. C.Type: GrantFiled: August 27, 1979Date of Patent: October 13, 1981Assignee: Union Carbide CorporationInventors: Mitchell H. Berger, Peter J. Gill, Louis M. Maresca
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Patent number: 4284461Abstract: A method for preparing an aluminum ion-filled polyimide adhesive wherein a meta-oriented aromatic diamine is reacted with an aromatic dianhydride and an aluminum compound in the presence of a water or lower alkanol miscible ether solvent to produce an intermediate polyamic acid; and thereafter converting the polyamic acid to the thermally stable, metal ion-filled polyimide by heating in the temperature range of 300.degree. C. to produce a flexible, high temperature adhesive.Type: GrantFiled: November 7, 1979Date of Patent: August 18, 1981Inventors: Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch, Anne K. St. Clair, Larry T. Taylor, Terry L. St. Clair
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Patent number: 4281100Abstract: A method is described for making substantially solvent-free particulated injection moldable polyetherimide oligomer directly from aromatic bis(ether anhydride) and organic diamine. The particulated polyetherimide oligomer can be used to make shaped, high molecular weight polyetherimide by melt polymerization.Type: GrantFiled: June 18, 1980Date of Patent: July 28, 1981Assignee: General Electric CompanyInventor: Tohru Takekoshi
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Patent number: 4247682Abstract: A polymer of the general formula: R'--M--Ar--B--Ar'--MArBAr'--.sub.k-2 M--Ar--B--Ar'--R wherein M and D, which can be the same or different, are independently ##STR1## wherein each Ar is independentlyR'--M--Ar--D--Ar'[--MArDAr'--].sub.k-2 M--Ar--D--Ar'--R"wherein L is ##STR2## phenyleneoxy, ##STR3## a covalent bond or T, wherein T is as defined belowand each Ar' is independently ##STR4## wherein T is O, S, phenyleneoxy, or --CR.sub.2 -- wherein R is as defined below, or --O--Ar--O-- wherein Ar can have any of the values set forth above and wherein R' and R" are independently ##STR5## wherein X is a covalent bond, --O--, --S--, or --CR.sub.2 -- wherein each R is independently hydrogen, an alkyl or fluoroalkyl group, preferably of 1 to 10 carbons, phenyl or an electron withdrawing group substituted phenyl, Y is CN, NO.sub.2, ##STR6## or if X is a covalent bond, Y can be hydrogen as well as any of the foregoing; or Ar"CO-- or Ar"SO.sub.Type: GrantFiled: May 7, 1979Date of Patent: January 27, 1981Assignee: Raychem CorporationInventor: Klaus J. Dahl
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Patent number: 4229566Abstract: Para-ordered aromatic heterocyclic polymers characterized by having p-benzbisoxazole, p-benzbisthiozole or p-benzbisimidazole units and containing diphenoxybenzene structures. The diphenoxybenzene structures function as "swivels" in the polymer chains, imparting flexibility thereto and making it possible to cast strong films from solutions of the polymers.Type: GrantFiled: August 24, 1979Date of Patent: October 21, 1980Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Robert C. Evers, Fred E. Arnold, Thaddeus E. Helminiak
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Patent number: 4223105Abstract: A method for preparing heterochain polymers, viz. polyamides or polyarylates which comprises an interphase polycondensation of diamines or bisphenols with dihaloanhydrides of dicarboxylic acids; said interphase polycondensation is performed by atomization of dihaloanhydrides of dicarboxylic acids in the form of an aerosol by means of a compressed gas into an aqueous solution of said diamines or bisphenols; concentration of said dihaloanhydrides of dicarboxylic acids in the aerosol is maintained within the range of from 0.4.times.10.sup.-4 to 2.times.10.sup.Type: GrantFiled: July 29, 1977Date of Patent: September 16, 1980Inventors: Vadim B. Igonin, Vladimir Z. Nikonov, Lev B. Sokolov, Valentin M. Savinov, Vitaly A. Vasiliev, Vladimir M. Ivanov, Vladimir A. Nikiforov, Savely A. Zhizhilev, Tatyana I. Nikitina, Lidia A. Klimenko, Olga I. Mischenko
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Patent number: 4221897Abstract: A method is provided for making polyetheramide acid having an intrinsic viscosity in N,N-dimethylacetamide of about 0.05 dl/g to 0.4 dl/g at 25.degree. C. A mixture of aromatic bis(ether dicarboxylic acid) or dianhydride is heated with a substantially equal molar amount of organic diamine in the presence of water and in the substantial absence of an organic solvent. The resulting polyetheramide acid is recovered as a finely divided powder and can be used to make high molecular weight polyetherimide by melt extrusion.Type: GrantFiled: May 9, 1979Date of Patent: September 9, 1980Assignee: General Electric CompanyInventor: Tohru Takekoshi
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Patent number: 4208509Abstract: A process for the production of high molecular weight, fiber- and film-trimming polyterephthaloyl oxalamidrazone and polydiphenylether-4,4'-dicarboxylic acid oxalamidrazone where a solution of pure terephtaloyl chloride or diphenyl-ether-4,4'-dicarboxylic acid dichloride in an inert solvent free from amines and water is slowly added, at a temperature between 10.degree. C. and 35.degree. C., to a solution of pure oxalic acid bisamidrazone in dimethyl acetamide and/or N-methyl pyrrolidone, free from amines and water, containing 4 to 6 percent by weight of anhydrous lithium chloride, the total quantity of the solvents used amounting to 1.25 to 3.30 liters per mole of oxalic acid bisamidrazone.Type: GrantFiled: January 20, 1978Date of Patent: June 17, 1980Assignee: Akzona IncorporatedInventors: Michael Wallrabenstein, Joachim Behnke, Walter Brodowski
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Patent number: 4197396Abstract: Disclosed is a process for preparing oligomeric polyetheramide-acid by reacting an aromatic dianhydride component including an aromatic bis(ether anhydride) with an organic diamine in an inert organic liquid selected from methylene chloride, chloroform, 1,2-dichloroethane, and mixtures thereof with acetone. The oligomeric polyetheramide-acid is substantially insoluble in the inert organic liquid, in which the oligomer typically appears as a precipitate which may be recovered in powder or finely divided particulate form without need for grinding.Type: GrantFiled: May 15, 1978Date of Patent: April 8, 1980Assignee: General Electric CompanyInventors: Eugene G. Banucci, Martin A. Byrne
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Patent number: 4197397Abstract: Aromatic polyimides with anhydride end groups are chain-extended (molecular weight increased) by reacting them with aromatic diamines or diamine terminated imide oligomers. The reaction can either be at a temperature above the melting point of the reactants or in solvents for the reactants. These polyimides can be shaped and formed prior to chain-extending.Type: GrantFiled: March 6, 1978Date of Patent: April 8, 1980Assignee: University of Notre Dame du LacInventor: Gaetano F. D'Alelio
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Patent number: T103703Abstract: A process for the production of a thermoplastic aromatic polyketone which process comprises reacting in the presence of a fluoroalkane sulphonic acid, preferably CF.sub.3 SO.sub.2 OH, the reactants selected from the following class:(a) at least one aromatic monocarboxylic acid of the formula: ##STR1## where --Y-- is a direct link, --O--, --S--, --NAr'-- where Ar' is a monovalent aromatic radical (preferably phenyl); Ar is a divalent aromatic radical but must not be --Ph--CO--Ph-- or --Ph--SO.sub.2 --Ph-- (where --Ph-- is phenylene) when y is 1; and n is an integer of .gtoreq.1 and y is an integer of 1 to 3;(b) a mixture of at least one aromatic dicarboxylic acid of the formula: ##STR2## where --X-- and --X'-- are independently a direct link --O--, --S--, --NAr'-- where Ar' is as defined in (a); m is 0 or an integer of .gtoreq.Type: GrantFiled: March 1, 1983Date of Patent: December 6, 1983Inventors: Howard M. Colquhoun, David F. Lewis