Patents Examined by Harold D. Anderson
  • N,N'-bis(maleimide)/hindered diamine copolymerizate
    Patent number: 5206338
    Abstract: Novel imido copolymers having improved thermal properties and well adapted for the production, e.g., of molded and cellular shaped articles, and laminates, are formed from (a) at least one N,N'-bis(maleimide), (b) at least one hindered diprimary diamine, e.g., of 4,4'-diamino-3,3',5,5'-tetraalkyldiphenylmethane or 1,3- or 1,4-(diamino)trialkylbenzene type, and, optionally, either (c.sub.1) at least one N-[(meth)allyloxyphenyl]maleimide or (c.sub.2) admixture of at least one N-[(meth)allyloxyphenyl]maleimide with at least one N-[(meth)allyloxymono/di(meth)allylphenyl]maleimide.
    Type: Grant
    Filed: November 5, 1991
    Date of Patent: April 27, 1993
    Assignee: Ciba-Geigy Corporation
    Inventor: Pascal Barthelemy
  • Polymerization of carbon monoxide/non conjugated alkenyl benzene
    Patent number: 5206342
    Abstract: Linear alternating polymers of carbon monoxide, non-conjugated alkenylbenzene compound and optionally ethylene are produced by contacting the monomeric reactants under polymerization conditions in the presence of an inert reaction diluent and a catalytic quantity of a catalyst composition formed from a compound of palladium, the anion of a strong non-hydrohalogenic acid having a pKa less than 2 and a bis(dialkylphosphino)alkane. The polymer products are thermoplastics and have utility as engineering thermoplastics.
    Type: Grant
    Filed: December 17, 1991
    Date of Patent: April 27, 1993
    Assignee: Shell Oil Company
    Inventors: Eit Drent, Eric Kragtwijk
  • Crosslinked fluorinated poly(arylene ether)
    Patent number: 5204416
    Abstract: Fluorinated poly(arylene ethers) having a repeat unit such as ##STR1## are useful as dielectric materials in multilayer interconnects in integrated circuit chips and multichip modules and as protective materials for chips.
    Type: Grant
    Filed: April 7, 1992
    Date of Patent: April 20, 1993
    Assignee: Raychem Corporation
    Inventors: Frank W. Mercer, Richard C. Sovish
  • Preparation of polybenzoxazoles from halogenated polyamide anions
    Patent number: 5202389
    Abstract: This invention relates to a process for making polymers containing benzoxazole groups by heating, and thereby dehalogenating, novel anions of orthohalogenated aromatic amide groups of a polyamide. The products are useful as fibers and films.
    Type: Grant
    Filed: December 2, 1991
    Date of Patent: April 13, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert R. Burch, Jr.
  • Pyrolzed amine cured polymer of dithioether-linked phthalonitrile monomer
    Patent number: 5202414
    Abstract: Dithioether-linked phthalonitrile monomer are prepared by a substitution reaction between 4-nitrophthalonitrile and a dimercaptan and are polymerized to a high-temperature, oxidation-resistant polymer by heating them at a temperature above their melting point. The rate of polymerization is increased by the addition of an amine. Electrical conductivity of the polymer can be increased to the conductor range by heating the polymer above about 400.degree. C.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: April 13, 1993
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Teddy M. Keller, Thomas R. Price, deceased
  • Polyimides from substituted benzidine
    Patent number: 5202410
    Abstract: Certain substituted benzidines enable the preparation of linear chain, high molecular weight polyimides based on benzidine.
    Type: Grant
    Filed: October 21, 1991
    Date of Patent: April 13, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert S. Irwin
  • Polyimide from bis(N-isoprenyl)s of aryl diamides
    Patent number: 5200497
    Abstract: A process and polyimide product formed by the reaction of a bismaleimide with a bis(amidediene) wherein the bis(amidediene) is formed by reacting an excess of an acid chloride with 1,4-N,N'-diisoprenyl-2,3,5,6-tetramethyl benzene.
    Type: Grant
    Filed: August 16, 1990
    Date of Patent: April 6, 1993
    Assignee: The United States of America as represented by the Adminstrator, National Aeronautics and Space Administration
    Inventors: Joseph G. Smith, Jr., Raphael M. Ottenbrite
  • Process for preparing polycarbonate having reduced carbonate byproduct content
    Patent number: 5200496
    Abstract: A process for preparing polycarbonate wherein a chain terminator is added to the reaction mixture after substantial reaction of a carbonate precursor, a coupling catalyst is added to the reaction mixture after substantial reaction of the chain terminator, and base is added to the reaction mixture after reaction mixture after substantial reaction of the chain terminator in an amount sufficient to give a negative chloroformate test.
    Type: Grant
    Filed: July 2, 1991
    Date of Patent: April 6, 1993
    Assignee: The Dow Chemical Company
    Inventors: Sarat Munjal, Thomas M. Wardlow, Andrew F. Hall
  • Removal of water by venting during the polymerization of phenylene sulfide polymers with sulfur source/polar organic compound molar ratio being at least 0.36/1
    Patent number: 5200499
    Abstract: A method is provided for increasing reactant concentrations for the polymerization of PPS without creating a deterioration of the molecular weight of the resultant polymer by venting excessive by-product water during the polymerization reaction.
    Type: Grant
    Filed: November 29, 1990
    Date of Patent: April 6, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Jon F. Geibel, John E. Inda
  • Rigid-rod benzobisazole polymer containing cyclic phosphate ester
    Patent number: 5200495
    Abstract: Rigid-rod aromatic heterocyclic polymers having repeating units of the formula: ##STR1## wherein Ba is a benzobisazole moiety of the formula: ##STR2## wherein X is --O--, --S-- or --NH.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: April 6, 1993
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Fred E. Arnold, Jom P. Chen
  • Lactam-lactone copolymer
    Patent number: 5200498
    Abstract: Lactam-lactone copolymers are provided that range in properties from plastic to elastomer which are formed by reacting components of a polymerizable composition comprising: a lactam monomer; a lactone monomer; a C.sub.3 to C.sub.12 lactam magnesium halide catalyst; and an initiator.
    Type: Grant
    Filed: January 29, 1992
    Date of Patent: April 6, 1993
    Assignee: Monsanto Company
    Inventors: Kishore Udipi, Lionel R. Stebbins
  • Arylcyclobutene terminated carbonate polymer
    Patent number: 5198527
    Abstract: There are disclosed carbonate polymers having terminal arylcyclobutene moieties. Such carbonate polymers are prepared from one or more multi-hydric compounds and have an average degree of polymerization of at least about 2 based on multi-hydric compound. These polymers, including blends thereof, can be easily processed and shaped into various forms and structures according to the known techniques. During or subsequent to the processing, the polymers can be crosslinked, by exposure to heat or radiation, for example, to provide crosslinked polymer compositions. These compositions have a good combination of properties, including for example, processability into shaped articles having unexpectedly good combinations of toughness, solvent resistance, ignition resistance, modulus and resistance to thermal linear expansion.
    Type: Grant
    Filed: June 4, 1992
    Date of Patent: March 30, 1993
    Assignee: The Dow Chemical Company
    Inventors: Maurice J. Marks, Alan K. Schrock, Thomas H. Newman
  • Polymerizable composition comprising poly(allyl carbonate) of polyhydroxy compound and polyhydroxy compound
    Patent number: 5196492
    Abstract: A liquid composition which can undergo radical polymerization to produce an almost colorless and easily dyeable organic glass, containing (i) at least one poly(allyl carbonate) of a polyhydroxy alcohol having from 2 to 20 carbon atoms and from 2 to 6 hydroxy groups in the molecule, and (ii) at least one aliphatic polyol having from 2 to 5 hydroxy groups in the molecule, in quantities from 0.01 to 1% by weight on the whole composition.
    Type: Grant
    Filed: August 27, 1991
    Date of Patent: March 23, 1993
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Fiorenzo Renzi, Claudio Gagliardi, Franco Rivetti
  • Side chain condensation polymer which exhibits nonlinear optical response
    Patent number: 5196509
    Abstract: In one embodiment this invention provides polymalonamide polymers with side chains which exhibit nonlinear optical response.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: March 23, 1993
    Assignee: Hoechst Celanese Corp.
    Inventor: Diane E. Allen
  • Process for the preparation of a thermoplastically processable aromatic polyamide with phosphorus acid catalyst
    Patent number: 5196505
    Abstract: A thermoplastically processable aromatic polyamide is prepared by polycondensing diacid monomer A with diamine monomer B: (A) HOOC--Ar--COOH;(B) H.sub.2 N--Ar'--NH.sub.2 ; wherein Ar is 1,3-- or 1,4-phenylene; 1,4--, 1,5--, 2,6-- or 2,7-naphthylene, ##STR1## and Ar' is ##STR2## wherein X is --SO.sub.2 -- or --CO--; Y is --O-- or --S--; Z is --O--, --S--, --SO.sub.2 --, --CO-- or ##STR3## wherein R and R' each is --H or C.sub.1 -- to C.sub.4 -alkyl and n is 0 or 1 in the melt at a temperature in the range of from 200.degree. to 400.degree. C. in the presence of a catalyst selected from the group consisting of alkyl- or aryl-phosphonic acids, -phosphonous acids, -phosphinic acids, esters thereof, halides thereof and mixtures thereof, the catalyst content being 0.01 to 2.0 mol % relative to the total content of components A and B.
    Type: Grant
    Filed: December 6, 1990
    Date of Patent: March 23, 1993
    Assignee: Huels Aktiengesellschaft
    Inventors: Gunter Poll, Jurgen Finke
  • Poly(N-substituted iminocarbonate)
    Patent number: 5194570
    Abstract: Poly(N-phenyl urethanes) and methods of preparing same by heating poly(N-phenyl iminocarbonates) to a temperature above 250.degree. C. so that the backbone of the polyiminocarbonate rearranges to form the poly(N-phenyl urethane). Poly(N-substituted iminocarbonates and methods of preparing same by suspending a dialkaline diphenol in an aprotic solvent at a basic pH and adding to the suspension an N-substituted iminophosgene. Methods for making heat-stable articles by forming an article from a poly(N-phenyl iminocarbonate) while heating the article to a temperature above about 250.degree. C. so that the poly(N-phenyl iminocarbonate) rearranges to form a poly(N-phenyl urethane).
    Type: Grant
    Filed: November 5, 1990
    Date of Patent: March 16, 1993
    Assignee: Rutgers, The State University of New Jersey
    Inventors: Joachim B. Kohn, Chun Liz
  • Fiber-forming copolyamide from 2-methyl-pentamethylene diamine
    Patent number: 5194578
    Abstract: A fiber-forming copolyamide consisting essentially of between about 60 and about 99.5 mole % hexamethylene adipamide units and between about 0.5 and 40 mole percent 2-methyl-pentamethylene adipamide units, the copolyamide having an RV greater than about 25, and a melting point of greater than about 220.degree. C.
    Type: Grant
    Filed: June 21, 1990
    Date of Patent: March 16, 1993
    Assignee: E.I. Du Pont de Nemours and Company
    Inventor: Anthony Anton
  • Polyamide containing reissert unit(s)
    Patent number: 5194575
    Abstract: Polyamide compositions containing Reissert units can be formed by the reaction of an open chain bis Reissert compound or a mono Reissert compound with a diamine and a diacid chloride.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: March 16, 1993
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Harry W. Gibson, Yajnanarayana H. R. Jois
  • Melt production of a thermoplastically processible aromatic polyamide with phosphorus compound catalyst and metal salt catalyst
    Patent number: 5194576
    Abstract: Aromatic polyamides with an improved stability toward thermal oxidation was achieved by polycondensation being performed in the presence of 0.05 to 4 mol % of a catalyst comprising a mixture of phosphorus compounds and metal salts.With the process according to the invention, it is possible to obtain aromatic polyamides stable toward thermal oxidation.
    Type: Grant
    Filed: January 31, 1992
    Date of Patent: March 16, 1993
    Assignee: Huels Aktiengesellschaft
    Inventors: Gunter Poll, Jurgen Finke, Horst Heuer
  • Phosphine oxide substituted polycarbonate
    Patent number: 5194564
    Abstract: Novel flame retardant polycarbonates are prepared that maintain a T.sub.g and an impact strength similar to that of non-modified polycarbonates. More particular, phosphine oxide containing polycarbonates are prepared that demonstrate improved flame retardancy and the retention of impact strength and glass transition temperature.
    Type: Grant
    Filed: June 18, 1992
    Date of Patent: March 16, 1993
    Assignee: General Electric Company
    Inventors: Gary C. Davis, Christianus A. A. Claesen, Erwin M. A. Gijzen