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 528/179)
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Patent number: 5116939Abstract: A process for preparing polyimides having enhanced melt flow properties is described. The process consists of heating a mixture of a high molecular weight poly(amic acid) or polyimide with a low molecular weight amic acid or imide additive in the range of 0.05 to 15% by weight of additive. The polyimide powders so obtained show improved processability, as evidenced by lower melt viscosity by capillary rheometry. Likewise, films prepared from mixtures of polymers with additives show improved processability with earlier onset of stretching by TMA.Type: GrantFiled: August 11, 1987Date of Patent: May 26, 1992Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: James C. Fletcher, J. Richard Pratt, Terry L. St. Clair, Diane M. Stoakley, Harold D. Burks
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Patent number: 5115088Abstract: The invention provides aromatic polyamides having a reduced melt viscosity which are derived from aromatic dicarboxylic acids, aromatic diamines and aromatic monocarboxylic acids being present in the polyamide in an amount of from 0.01 to 10 mol %. The invention allows molding compositions to be provided which have improved processability and good mechanical properties.Type: GrantFiled: October 24, 1990Date of Patent: May 19, 1992Assignee: Huels AktiengesellschaftInventors: Gunter Poll, Martin Bartmann, Jurgen Finke
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Patent number: 5112942Abstract: Copolyimides and their precursors are disclosed comprising units represented by the formula ##STR1## where R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and are hydrogen or C.sub.1 to C.sub.6 linear or branched alkyl, with the proviso that R.sub.1, R.sub.2, R.sub.3 and R.sub.4 cannot simultaneously be hydrogen and where Z is a chemical bond, ##STR2## Ar is the tetravalent residue of a tetracarboxylic acid or acid dianhydride or di- or tetraester thereof, where x and y are integers from about 100 to about 1,000, and the ratio of x to y is from about 1:99 to about 49:51, and z is 0-5.These copolymers have improved resistance to stress cracking. They may also be used in applications such as coatings, or adhesives.Type: GrantFiled: September 26, 1990Date of Patent: May 12, 1992Assignee: Ethyl CorporationInventor: Wesley C. Blocker
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Patent number: 5108839Abstract: Composites based on PEEKK and reinforcing fibers give moldings which have a high modulus of elasticity. The moldings have a higher rigidity and heat resistance in comparison with moldings produced from prior-art polyetherketones. The proportion of reinforcing fibers is 1 to 70% by weight. Composites of this type can be processed in standard injection molding machines.Type: GrantFiled: February 12, 1990Date of Patent: April 28, 1992Assignee: Hoechst AktiengesellschaftInventors: Andreas Lucke, Arnold Schneller
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Patent number: 5109058Abstract: A solution composition of a polyimide resin type curable resin having imide and alkoxysilyl groups is prepared by reacting a polyimide with a silicon compound in an organic solvent. The solution can be cured through relatively mild heating into coatings having enhanced substrate adherence and solvent resistance and thus suitable as protective coatings on electronic parts.Type: GrantFiled: August 2, 1991Date of Patent: April 28, 1992Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Hiroshige Okinoshima, Hideto Kato
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Patent number: 5109107Abstract: The present invention provides for a novel heat stable class of polyamide-imide polymers having excellent flow properties and hydrolytic stability which are prepared by forming the polycondensation product of one or more aromatic or aliphatic diamines, one or more additional comonomers selected from the group consisting of a tetrafunctional aromatic dianhydride, an aromatic or aliphatic dicarboxylic acid (or acid derivative thereof) and mixtures thereof, and a comonomer comprising a tri- or hexafluoro-substituted tricarboxylic acid anhydride (or acid derivative thereof) having the structure: ##STR1## wherein Z is CF.sub.3 or a phenyl radical.Type: GrantFiled: December 21, 1990Date of Patent: April 28, 1992Assignee: Hoecht Celanese Corp.Inventors: Rohitkumar H. Vora, Paul N. Chen, Sr.
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Patent number: 5106938Abstract: Polyetherimide resins which crystallize from the melt contain crystallizing repeating units based on biphenoldianhydride or hydroquinone dianhydride and a linear aromatic diamine. The melt crystalline polyetherimides exhibit improved solvent resistance. The melt crystalline polymers retain the advantageous properties associated with their known amorphous polyetherimide counterparts.Type: GrantFiled: June 8, 1989Date of Patent: April 21, 1992Assignee: General Electric CompanyInventors: Dana C. Bookbinder, Edward N. Peters, Donald R. Berdahl, Pamela A. Matsch
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Patent number: 5104960Abstract: Azole rings, such as oxazole and thiazole rings, can activate an aromatic ring bonded to a leaving group such as a halogen atom so that the aromatic ring will undergo aromatic nucleophilic substitution. The reaction is useful for making ethers, thioethers and amines containing azole rings. In particular, monomers having azole rings, activated aromatic rings with leaving groups and nucleophilic moieties can react under conditions of aromatic nucleophilic displacement to form non-rigid rod PBZ polymers. The non-rigid rod PBZ polymers can be used to form molecular composites with rigid rod PBZ polymers which molecular composites are not substantially phase separated.Type: GrantFiled: February 22, 1989Date of Patent: April 14, 1992Assignee: The Dow Chemical CompanyInventors: Muthiah N. Inbasekaran, Michael J. Mullins
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Patent number: 5104967Abstract: The solvent-resistance and thermal stability of polyamideimides of the general formulae: ##STR1## is improved by capping the amideimides with a crosslinking functionality (Y) containing a residue selected from the group of: ##STR2## wherein R.sub.1 =lower alkyl, lower alkoxy, aryl, aryloxy, substituted alkyl, substituted aryl (either including hydroxyl or halo-substituents), halogen, or mixtures thereof;j=0, 1, or 2;G=--CH.sub.2 --, --O--, --S--, --SO.sub.2 --, --SO--, --CO--, --CHR--, or --CR.sub.2 --;R=hydrogen, lower alkyl, or phenyl;T=methallyl or allyl;Me=methyl;R.sub.2 =a trivalent organic radical; andR.sub.3 =a divalent organic radical.The amideimide oligomers may be linear or multidimensional, and can be processed into blends, prepregs, or composites. Methods of making these amideimides and intermediates useful in the syntheses are also described.Type: GrantFiled: April 13, 1988Date of Patent: April 14, 1992Assignee: The Boeing CompanyInventors: Clyde H. Sheppard, Hyman R. Lubowitz
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Patent number: 5098991Abstract: A process is disclosed for preparation of anhydrides containing additional carboxylic acid moieties and dianhydrides of disubstituted maleic anhydride compounds wherein the acid anhydrides and dianhydrides retain their alkene character. The resulting alkene compounds are useful as precursors for polyesters, thermally stable polyamide-imides and polyimides which are also disclosed, as well as a process for their preparation.Type: GrantFiled: January 8, 1990Date of Patent: March 24, 1992Assignee: Amoco CorporationInventors: Steven J. Behrend, David A. Young, Ellis K. Fields
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Patent number: 5096998Abstract: A reactive oligoimide, which may serve as an adhesive for bonding at least one layer or film to another layer, preferably a flexible metallic layer to a flexible layer of a polyimide, in order to form a flexible multilayer metal-clad laminate.Type: GrantFiled: October 31, 1990Date of Patent: March 17, 1992Assignee: E. I. Du Pont de Nemours and CompanyInventor: Philip Manos
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Patent number: 5097001Abstract: A high modulus, high strength melt processable copolyester consisting essentially of recurring units (I), (II), (III) and (IV): ##STR1## wherein said copolyester has a melting point in the range of from about 340.degree. C. to 400.degree. C., a crystallization temperature of from about 300.degree. C.-340.degree. C., and a crystallization rate of at least 1,000 counts/minute.Type: GrantFiled: September 26, 1989Date of Patent: March 17, 1992Inventors: Richard Layton, James W. Cleary, Paul J. Huspeni, Paul D. Frayer
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Patent number: 5089591Abstract: Polybenzazole polymers can be advanced rapidly to high molecular weight at relatively high temperatures and high shear in a dehydrating solvent acid.Type: GrantFiled: October 19, 1990Date of Patent: February 18, 1992Assignee: The Dow Chemical CompanyInventors: Thomas Gregory, Carl W. Hurtig, Harvey D. Ledbetter, Kenneth J. Quackenbush, Steven Rosenberg
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Patent number: 5081229Abstract: The present invention provides a copolyimide characterized in that the copolyimide contains units represented by formulas (I) and (II) ##STR1## (wherein R.sub.0 represents an aromatic tetracarboxylic residue). The polyimide has excellent thermal dimensional stability, and can be fabricated by using conventional inexpensive materials.Type: GrantFiled: June 7, 1989Date of Patent: January 14, 1992Assignee: Kanegafuchi Chemical Ind. Co., Ltd.Inventors: Kiyokazu Akahori, Hideki Kawai, Hirosaku Nagano
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Patent number: 5079289Abstract: This invention pertains to novel copolyesters consisting essentially of units (I), (II), (III), and (V). ##STR1## and blends of these polymers and articles made from both. Units (I), (II), (III), and (IV) are present in specified proportions as defined in the "Description of the Invention". The instant copolyesters display orientation in the molten state, good fiber ratings and high strength; they have melting points in the range of from about 340.degree. to about 400.degree. C. and are melt-processible. Advantageously, these compositions filled with about 30 weight percent of glass fibers display heat distortion temperatures of over 240.degree. C. up to about 280.degree. C. and higher, when measured under a load of 264 psi. When blended, certain properties are improved, particularly they are easier to melt fabricate, have a decreased tendency to blister and increased strength.Type: GrantFiled: June 4, 1990Date of Patent: January 7, 1992Assignee: Amoco CorporationInventors: Richard Layton, James W. Cleary, Paul J. Huspeni, Paul D. Frayer, Markus Matzner
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Patent number: 5075416Abstract: A process for the preparation of an aromatic hydrocarbon resin modified with aromatic carboxylic acids comprising suspending methane sulfonic acid and at least one aromatic carboxylic acid in an aliphatic solvent and slowly proportioning at least one unsaturated aromatic hydrocarbon into the suspension under polymerization conditions and their salts.Type: GrantFiled: January 29, 1991Date of Patent: December 24, 1991Assignee: Rutgerswerke AGInventors: Peter Staglich, Bodo Friedrich, Hans Spengler, Robert Zellerhoff
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Patent number: 5070176Abstract: Disclosed is a process for preparation of a polyarylate having a degree of polymerization of at least 50 by polymerizing an admixture comprised of 4-dialkylaminopyridine, an acid anhydride, bisphenol-A and a mixture of isophthalic acid and terephthalic acid by the steps of(1) subjecting the admixture to a pressure in the range of 500 to 1400 mm of Hg and a temperature in the range of 20.degree. to 150.degree. C. while maintaining a degree of polymerization of substantially 1.0,(2) subjecting the admixture to a pressure in the range of 500 to 1400 mm of Hg and a temperature in the range of 285.degree. to 350.degree. C. to achieve a degree of polymerization in the range of 2 to 7,(3) subjecting the admixture to a pressure in the range of 100 to 400 mm of Hg and a temperature in the range of 285.degree. to 350.degree. C. to achieve a degree of polymerization in the range of 7 to 15,(4) subjecting the admixture to a pressure in the range of 100 to 400 mm of Hg and a temperature in the range of 330.degree. to 400.Type: GrantFiled: September 21, 1990Date of Patent: December 3, 1991Assignee: Eastman Kodak CompanyInventor: Marc A. Strand
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Patent number: 5070181Abstract: Disclosed is a film of polyimide having repeating units of formula (1) and a birefringence (.DELTA.n) of at least 0.13: ##STR1## wherein R.sup.1 is an aromatic group having a valency of 4, at carbon atoms constituting the aromatic ring, and R.sup.2 is an aromatic group having a valency of 2, at carbon atoms constituting the aromatic ring. This polyimide film exhibits good thermal dimensional stability.Type: GrantFiled: August 7, 1989Date of Patent: December 3, 1991Assignee: Kanegafuchi Chemical Ind. Co., Ltd.Inventors: Hideki Kawai, Kiyokazu Akahori, Hirosaku Nagano
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Patent number: 5068307Abstract: A polyamideimide having an inherent viscosity of above 0.48 which comprises a unit of the following formula (II) ##STR1## and a unit of the following formula (IV) ##STR2## as main units forming the molecular chains of the polyamideimide, and an intimate mixture of the polyamideimide and a plasticising material for the polyamideimide.Type: GrantFiled: November 8, 1989Date of Patent: November 26, 1991Assignee: Teijin LimitedInventors: Shigeyoshi Hara, Hiroo Inata, Shunichi Matsumura
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Patent number: 5066766Abstract: Disclosed is a process for the preparation of poly(ester-carbonates) wherein (1) an aromatic diol, (2) methyl phenyl carbonate and (3) an alkyl carboxylate ester component selected from an aromatic dicarboxylate ester, a hydroxy aromatic carboxylate ester or a mixture thereof are contacted in the presence of a transesterification/polycondensation catalyst under transesterification/polycondensation conditions of pressure and temperature.Type: GrantFiled: April 13, 1990Date of Patent: November 19, 1991Assignee: Eastman Kodak CompanyInventors: Winston J. Jackson, Jr., William R. Darnell
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Patent number: 5064930Abstract: A process comprising(A) preparing a solid polyarylate prepolymer having an inherent viscosity of at least about 0.1 by heating at a temperature in the range of 140.degree. C. to 300.degree. C. in the melt phase an acid anhydride derived from a carboxylic acid containing 2 to 6 carbon atoms, a dihydric phenol and an aromatic dicarboxylic acid in the presence of a hypernucleophilic base which comprises a heterocyclic aromatic compound containing nitrogen and having an aprotic electron releasing group directly bonded to a carbon atom in the aromatic compound, and(B) increasing the molecular weight of the solid polyarylate prepolymer to an inherent viscosity of at least 0.4.Type: GrantFiled: September 27, 1990Date of Patent: November 12, 1991Assignee: Eastman Kodak CompanyInventors: Bruce C. Bell, Winston J. Jackson, Jr.
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Patent number: 5061783Abstract: The process of the present invention includes first treating a polyamide-acid (such as LARC-TPI polyamide-acid) in an amide-containing solvent (such as N-methylpyrrolidone) with an aprotic organic base (such as triethylamine), followed by dehydrating with an organic dehydrating agent (such as acetic anhydride). The level of crystallinity in the linear aromatic polyimide so produced is maximized without any degradation in the molecular weight thereof.Type: GrantFiled: April 30, 1990Date of Patent: October 29, 1991Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventor: Terry L. St. Clair
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Patent number: 5061781Abstract: Polymides are made by imidization of the product of reaction of dianhydrides with diaminobenzotrifluoride and bis(trifluoromethyl) oxydianilines. In preferred embodiments the polyimides are end capped with monoanhydride or monoamine residues.Type: GrantFiled: March 20, 1991Date of Patent: October 29, 1991Assignee: American Cyanamid CompanyInventors: Andrea Leone-Bay, Steven L. Peake, Stanley S. Kaminski
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Patent number: 5055549Abstract: The present invention is connected with a process for preparing a novel photosensitive polyimide precursor having excellent shelf stability and high sensitivity and containing less impurities.The process for preparing a photosensitive heat-resistant polymer containing a repeating unit represented by the formula (III) comprises the step of reacting a photosensitive group-containing isoimide represented by the formula (I) with a diamine represented by the formula (II) at a temperature of 0.degree. to 100.degree. C. in the presence of a solvent: ##STR1## wherein R.sup.1 is independently a tetravalent carbon cyclic aromatic group or heterocyclic group; R.sup.2 is independently an aliphatic group having at least 2 carbon atoms, an alicyclic group, an aromatic aliphatic group, a carbon cyclic aromatic group, a heterocyclic group or a polysiloxane group; R.sup.3 is a monovalent organic group having a photosensitive unsaturated group; and D is an oxygen atom or .dbd.N--R.sup.3.Type: GrantFiled: January 8, 1990Date of Patent: October 8, 1991Assignee: Chisso CorporationInventors: Hirotoshi Maeda, Kouichi Kunimune
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Patent number: 5039773Abstract: Thermotropic liquid crystalline polymers represented by the formulas as illustrated in FIGS. 1 and 2 wherein m, n, and o represent the number of monomer segments present; and x, y, and z are independently selected from the group consisting of alkyl, substituted alkyl, alkylene, and substituted alkylene.Type: GrantFiled: October 2, 1989Date of Patent: August 13, 1991Assignee: Xerox CorporationInventors: Guerino Sacripante, Lupu Alexandru
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Patent number: 5037220Abstract: Films from aromatic polyesters and from aromatic polyestercarbonates are excellently suitable for preparing printing ribbons, in particular for thermal and electrothermal recording processes.Type: GrantFiled: July 13, 1988Date of Patent: August 6, 1991Assignee: Bayer AktiengesellschaftInventors: Volker Serini, Bernhard Schulte, Claus Burkhardt, Dieter Freitag, Uwe Hucks, Werner Waldenrath, Hans-Leo Weber
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Patent number: 5030703Abstract: The liquid crystal polycondensates according to the invention based on aromatic hydroxycarboxylic acids, if appropriate aromatic aminocarboxylic acids, diphenols, if appropriate aminophenols, aromatic dicarboxylic acids and if appropriate carbonic acid which are obtainable by polycondensation of the difunctional monomers mentioned in the melt in the presence of aromatic esters with a defined sequence of the structural units of the formula ##STR1## of oligomers with random distribution of the structural units of the formula ##STR2## have a good heat stability and exhibit a stable viscosity under the processing conditions. The liquid crystal polycondensates can be used for the production of shaped articles, films, fibers and filaments.Type: GrantFiled: September 5, 1989Date of Patent: July 9, 1991Assignee: Bayer AktiengesellschaftInventors: Harald Pielartzik, Rolf-Volker Meyer, Wolfgang Alewelt
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Patent number: 5025089Abstract: Copolyimides derived from the reaction product of 3,3'-6 F diamine or 4,4'-6 F diamine, at least one other diamine, and pyromellitic dianhydride can be rendered solvent soluble while at the same time exhibiting an improvement in both mechanical and electrical properties by the inclusion of at least one other dianhydride having a diaryl nucleus in the reaction media. Suitable such dianhydrides include bis (3,4 dicarboxy phenyl) ether dianhydride, 3,3'4,4' benzophenone tetracarboxylic dianhydride, 3,3',4,4' diphenyl tetracarboxylic acid dianhydride and 2,2 bis(3,4 dicarboxyphenyl) hexafluoropropane dianhydride (6F-DA). Such polyimides are soluble in common organic solvents such as methyl ethyl ketone or N-methyl pyrrolidone, and exhibit excellent film forming properties with improved mechanical and electrical properties as compared to the corresponding homopolyimides. They possess excellent heat stability (Tg's in excess of about 350.degree. C.Type: GrantFiled: November 13, 1989Date of Patent: June 18, 1991Assignee: Hoechst Celanese Corp.Inventors: Rohitkumar H. Vora, Paul N. Chen, Sr.
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Patent number: 5021541Abstract: A polycarbonate resin comprising either a structural unit derived from a spiro ring-containing dihydric phenol, or such a structural unit and a structural unit derived from a dihydric phenol, and a process for producing the same. The polycarbonate resin has excellent flowability and moldability, and also improved optical properties (low refractive index, large Abbe number, etc.), and can be advantageously used in various fields, e.g., as a material for molded articles for optical use and other precision molded articles.Type: GrantFiled: February 15, 1990Date of Patent: June 4, 1991Assignee: Mitsubishi Gas Chemical Co., Ltd.Inventors: Mitsuhiko Masumoto, Satoshi Kanayama, Toshiaki Asoh, Teruo Kawahigashi
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Patent number: 5015720Abstract: Polycarbonates containing aliphatic dicarboxylic ester groups, and having glass transition temperatures and processing temperatures lower than the corresponding homopolycarbonates are prepared via an intermediate which is in turn prepared from a dihydroxyaromatic compound and a C.sub.4-6 aliphatic dicarboxylic acid anhydride, preferably succinic anhydride. Phosgenation of said intermediate produces the desired soft segment polycarbonate.Type: GrantFiled: June 8, 1990Date of Patent: May 14, 1991Assignee: General Electric CompanyInventors: Eugene P. Boden, Peter D. Phelps
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Patent number: 5006632Abstract: This invention provides a process for preparing hydroxybenzoic acid polyer resins with a high degree of heat resistance and a high degree of polymerization, and is characterized in that: with the aid of intermediate transformation of phenol and by means of esterification, polyester can directly be obtained by polycondensation from the only starting material hydroxybenzoic acid. The transfer medium phenol existing in the distillates mixture can directly and repeatedly be used without any compensation. The product obtained in this invention is low cost, having a high degree of polymerization, 80-90% yield and in less than 1 hr, with 3% weight loss percentage at 400.degree. C. It can be used for various industrial and engineering purposes wherever heat-resistant, abrasion-resistant, self-lubricating, good heat conducting, dielectric, solvent and radiation resisting properties are required.Type: GrantFiled: November 3, 1989Date of Patent: April 9, 1991Assignee: The First Branch of Chenguang Research Institute of Chemical IndustryInventors: Renxian Duan, Chengjiu Peng, Guijiang Tian
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Patent number: 5006628Abstract: A process for preparing a polyarylate by heating in the melt phase in the presence of a 4-dialkylaminopyridine, an acid anhydride which is in the range of stoichiometric amount to 25% molar excess, bisphenol-A and a dicarboxylic acid selected from the group consisting of isophthalic acid and mixtures of isophthalic acid and terephthalic acid wherein the ratio of isophthalic acid to terephthalic acid is in the range of 100:0 to 25:75.Type: GrantFiled: August 15, 1990Date of Patent: April 9, 1991Assignee: Eastman Kodak CompanyInventors: Winston J. Jackson, Jr., W. Ronald Darnell, Bruce C. Bell, Marc A. Strand
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Patent number: 5004796Abstract: A polyarylate is formed by reacting a mixture of a diester of a dihydric phenol, at least one aromatic dicarboxylic acid and an inert diluent comprising a poly(fluorinated alkylene oxide). Polyarylates of improvided color can be formed and the diluent can be easily separated from the polyarylate and reaction byproducts.Type: GrantFiled: January 12, 1990Date of Patent: April 2, 1991Assignee: Hoechst Celanese CorporationInventors: Richard Vicari, John R. Costanza, Ronald R. Lamonte, Ralph M. Miano
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Patent number: 4994546Abstract: Process for preparing polyarylates comprising the steps of (a) prepolymerizing a diester of Bisphenol-A with at least one aromatic dicarboxylic acid to form a prepolymer having a melting point of at least about 200.degree. C. and being fluid at the polymerization temperature; followed by (b) polycondensing said prepolymer under agitation until it is substantially transformed into a powdery solid; maintaining said agitation to keep the powdery solid in a polydispersed solid state; and continuing the polymerization below the agglomeration temperature of the polymerizing solid, until the desired molecular weight is reached.Type: GrantFiled: February 9, 1990Date of Patent: February 19, 1991Assignee: Amoco CorporationInventors: Brian A. Stern, Richard Layton
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Patent number: 4992526Abstract: High molecular weight polyarylate polymers comprise alternating moieties derived from an aromatic dicarboxylic acid halide, with moieties derived from a hydroxyaryl-substituted 1,6-diaza [4.4] spirodilactam compound and, optionally, with moieties derived from a di(hydroxyphenyl) compound are prepared by interfacial polymerization in an aqueous-organic medium containing an alcohol.Type: GrantFiled: December 21, 1989Date of Patent: February 12, 1991Assignee: Shell Oil CompanyInventor: Pen-Chung Wang
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Patent number: 4983706Abstract: A process which comprises reacting interfacially a dihydric phenol, a carbonate precursor and a prior prepared salt of an aliphatic alpha omega dicarboxylic acid having from 8 to about 20 carbon atoms thereby producing a copolyestercarbonate.Type: GrantFiled: January 30, 1990Date of Patent: January 8, 1991Assignee: General Electric CompanyInventors: Luca P. Fontana, Paul W. Buckley, Denise Y. Harris, Eugene P. Boden
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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: 4973652Abstract: The invention relates to a process for the production of aromatic polycarbonates, aromatic polyester carbonates and aromatic polyesters by the known two-phase interfacial method which is characterized in that a mixture of aromatic hydrocarbons with alkanes and/or cycloalkanes is used as the organic phase and in that phosphines or phosphine oxides are used as the catalysts.Type: GrantFiled: June 6, 1989Date of Patent: November 27, 1990Assignee: Bayer AktiengesellschaftInventors: Wolfgang Ebert, Rolf-Volker Meyer, Rolf Dhein, Udo Oels
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Patent number: 4963645Abstract: A terminal-modified imide oligomer having an unsaturated group as a terminal group and an imide bond inside of the oligomer which is produced by reacting 2,3,3',4'-or 3,3',4,4'-biphenyltetracarboxylic acid or its derivative, a diamine compound, and an unsaturated dicarboxylic acid or its derivative and/or an unsaturated monoamine in an organic solvent is disclosed. This oligomer has a logarithmic viscosity of not more than 1.0. This logarithmic viscosity is measured under the conditions of concentration of 0.5 g/100 ml-solvent (N-methyl-2-pyrrolidone) and a temperature of 30.degree. C., and has a melting point of 50.degree. to 300.degree. C.Type: GrantFiled: August 24, 1988Date of Patent: October 16, 1990Assignee: Ube Industries, Ltd.Inventors: Hiroshi Inoue, Tadao Muramatsu, Tetsuji Hirano
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Patent number: 4963647Abstract: The present invention provides novel heat stable polyamide-imide polymers 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 trifunctional acid anhydride monomers, wherein at least one of said diamine monomers is a 12F-Diamine or 12F-Oxydiamine containing at least two CF.sub.3 ##STR1## R groups 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 degredation.Type: GrantFiled: February 27, 1989Date of Patent: October 16, 1990Assignee: Hoechst Celanese Corp.Inventors: Rohitkumar H. Vora, Paul N. Chen, Sr., Jeffrey S. Devolve
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Patent number: 4963643Abstract: Described herein are novel crystalline polyarylnitrile polymers which have excellent mechanical and thermal properties. Also, described is a process for producing such polyarylnitrile polymers.Type: GrantFiled: May 1, 1989Date of Patent: October 16, 1990Assignee: Amoco CorporationInventors: Louis M. Maresca, Alford G. Farnham, Thomas H. Schwab, Ulrich A. Steiner
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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: 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: 4960859Abstract: There are provided copolymers having repeating units of the formula ##STR1## 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 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: 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: 4959449Abstract: Polyarylates formed by reacting the diester of a dihydric phenol such as bisphenol-A and at least one aromatic dicarboxylic acid in the presence of an esterification catalyst is provided with improved color by the addition of cobalt during polymerization. The amount of cobalt can be reduced and an additional amount of an ultramarine blue pigment can be added to the reaction mixture to maintain the color improvement.Type: GrantFiled: May 25, 1989Date of Patent: September 25, 1990Assignee: Hoechst Celanese CorporationInventors: Adin L. Stautzenberger, Edward E. Quick, Peter F. Lobo
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Patent number: 4957996Abstract: Improved polyarylate color is achieved by dissolving in the polyarylate-forming reaction mixture a cobalt salt of an ester of a C.sub.3 to C.sub.20 aliphatic or iso-aliphatic hydrocarbon. The cobalt salt is preferably predissolved prior to addition to the reaction mixture.Type: GrantFiled: October 12, 1988Date of Patent: September 18, 1990Assignee: Hoechst Celanese CorporationInventor: Ronald R. Lamonte
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Patent number: 4954610Abstract: The present invention provides novel heat stable polyamide-imide polymers 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 trifunctional acid anhydride monomers, at least one of said diamine monomers containing the group ##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: February 27, 1989Date of Patent: September 4, 1990Assignee: Hoechst Celanese Corp.Inventors: Paul N. Chen, Sr., Rohitkumar H. Vora
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Patent number: 4954611Abstract: The present invention provides for shaped articles made from novel heat stable polyamide-imide polymers 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, one or more trifunctional acid anhydride monomers, and one or more tetrafunctional aromatic dianhydrides, at least one of said monomers 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 attach 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: February 27, 1989Date of Patent: September 4, 1990Assignee: Hoechst Celanese Corp.Inventors: Paul N. Chen, Sr., Rohitkumar H. Vora
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Patent number: 4952663Abstract: This invention relates to the preparation of wholly aromatic polyesters from monomers having a total ash content of no more than 50 ppm and a total potassium content of no more than 20 ppm. These polyesters have good color and good thermal stability and are essentially free of char material which can lead to unacceptable molded and extruded articles.Type: GrantFiled: June 17, 1988Date of Patent: August 28, 1990Assignee: Amoco CorporationInventors: James W. Cleary, Richard Layton