Patents Examined by Harold D. Anderson
  • Patent number: 5530089
    Abstract: Polysulfoneimide oligomers having crosslinking end cap moleties which provide improved solvent-resistance to cured composites are generally represented by backbones of the formula: ##STR1## wherein ##STR2## n=1 or 2; R and R' are divalent aromatic organic radicals having from 2-20 carbon atoms; ##STR3## E=allyl or methallyl; R=a trivalent C.sub.(6-13) aromatic organic radical;R.sub.1 =any of lower alkyl, lower alkoxy, aryl, or substituted aryl;R'=a divalent C.sub.(6-30) aromatic organic radical;j=0, 1, or 2; andG=--CH.sub.2 --, --O--, --S--, or --SO.sub.2 --The crosslinkable oligomers are made by reacting substituted phthalic anhydrides with hydroxyaryl amines and suitable crosslinking end cap reactants, or by self-condensation of phthalimide salts followed by capping the polymers.
    Type: Grant
    Filed: September 6, 1988
    Date of Patent: June 25, 1996
    Assignee: The Boeing Company
    Inventors: Clyde H. Sheppard, Hyman R. Lubowitz
  • Patent number: 5371183
    Abstract: The present invention provides a process for preparing urethanes and carbonates from an amine or an alcohol, carbon dioxide and a hydrocarbyl halide. The amine or alcohol is reacted with carbon dioxide in a suitable solvent system and in the presence of an amidine or guanidine base, to form the ammonium carbamate or carbonate salt which is then reacted in a polar aprotic solvent with a hydrocarbyl halide. Polymer products can also be prepared utilizing this process or utilizing the resulting urethanes and carbonates under standard polymerization conditions.
    Type: Grant
    Filed: November 16, 1992
    Date of Patent: December 6, 1994
    Assignee: Monsanto Company
    Inventors: William D. McGhee, Dennis P. Riley
  • Patent number: 5352760
    Abstract: Oligomeric monomers are produced by reaction of a bisphenol compound with ther a dihalobenzophenone or a (2, 2) bis (4-halophenyl) hexafluoropropane and any other activated halogen containing aromatic compounds in the presence of a base and an appropriate solvent. The resulting oligomeric product, a dialkaline bisphenate terminated salt, is then reacted with 4-nitrophthalonitrile to form an oligomer-based phthalonitrile. These oligomers, in the presence or absence of an curing agent, may then be heated to form high temperature thermosetting polymers. These polymers can potentially be used as advanced materials for composites, as adhesives, and for microelectronic applications.
    Type: Grant
    Filed: February 18, 1993
    Date of Patent: October 4, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Teddy M. Keller
  • Patent number: 5338807
    Abstract: A creping aid comprising the reaction product of a polyamide of a dibasic acid or of the ester of an aliphatic dibasic acid and methyl bis(3-aminopropylamine) with epichlorohydrin in a mole ratio of the polyamide to the epichlorohydrin between about 1:0.1 and about 1:0.33, and a composition comprising an aqueous solution of the creping aid.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: August 16, 1994
    Assignee: Hercules Incorporated
    Inventors: Herbert H. Espy, William W. Maslanka
  • Patent number: 5336751
    Abstract: A composition comprising a block aromatic copolycarbonate having from about 2 to 30 mole % of the total repeating carbonate units derived from resorcinol.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: August 9, 1994
    Assignee: General Electric Company
    Inventor: Paul C. Raymond, III
  • Patent number: 5331085
    Abstract: Polycarbonate batches dissolved in dichloromethane and having a solids content ranging from about 10 to about 30 weight percent are solution blended in a vessel. The batch-to-batch viscosity (MW) variability is reduced by about 40 to about 260 percent. The invention is effective with polycarbonate materials in the molecular weight range of about 15,000 to about 100,000 amu, regardless of chain terminator, co-monomer or branching agents used.
    Type: Grant
    Filed: May 28, 1993
    Date of Patent: July 19, 1994
    Assignee: General Electric Company
    Inventors: Randy Northrop, Kent Wenderoth
  • Patent number: 5324808
    Abstract: In reactions to form PBZ polymers such as polybenzoxazole, monomers having an aromatic group bonded to a primary amine group and to a hydroxy, thio or amine group ortho to said primary amine group are contacted with monomers having an electron-deficient carbon group. In the present invention the electron deficient carbon group may be an alkali metal carboxylate group or a trihalomethyl group. Useful monomers include, for example, .alpha.,.alpha.,.alpha.,.alpha.',.alpha.',.alpha.'-hexachloroxylene and disodium terephthalate.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: June 28, 1994
    Assignee: The Dow Chemical Company
    Inventor: Ying H. So
  • Patent number: 5324812
    Abstract: Water soluble polyamides may be produced by reacting two different dicarboxylic acids with at least one low molecular weight poly(alkylene glycol) diamine and at least one relatively high molecular weight polyoxyalkylene diamine. One dicarboxylic acid may be of low molecular weight, such as adipic acid and the other of relatively high molecular weight such as C.sub.36 dimer acid. In one embodiment, some dimer acid proportion is preferred. The poly(alkylene glycol) diamine may include triethylene glycol diamine and tetraethylene glycol diamine. The polyoxyalkylene diamine should have at least some ethylene oxide residue therein; for example it may be a polyoxyethylene/polyoxypropylene diamine. The resulting polyamides have a desirable combination of properties, including high strength with water solubility, the latter making the materials easier to work with and very useful.
    Type: Grant
    Filed: April 1, 1993
    Date of Patent: June 28, 1994
    Assignee: Texaco Chemical Company
    Inventors: George P. Speranza, Christopher S. Henkee
  • Patent number: 5324809
    Abstract: The present invention relates to a method of preparing a copolymeric polycarbonate which comprises melt-polycondensing a mixture of an aromatic dihydroxy compound comprising hydroquinone or substituted hydroquinones and a diester carbonate in the presence of a catalyst containing alkali metal compounds and/or alkaline earth metal compounds.
    Type: Grant
    Filed: June 24, 1992
    Date of Patent: June 28, 1994
    Assignee: GE Plastics Japan, Ltd.
    Inventors: Takeshi Sakashita, Tomoaki Shimoda, Kotaro Kishimura, Shuichi Uchimura
  • Patent number: 5322922
    Abstract: Mixtures of salts of organic carboxylic acids and organic compounds of non-salt character, dissolved in a C.sub.1 -C.sub.4 alkanol, can be concentrated or separated with a semipermeable membrane made from a copolyamide or copolyimide-amide which contains (a) a first aromatic diamine radical and (b) a second aromatic diamine radical which carries --SO.sub.3 M groups, where M is H.sup..sym., a monovalent to polyvalent metal cation or an ammonium cation. Provided the first diamine radical contains C.sub.1 -C.sub.4 alkyl groups in the o-positions to the amino groups, the copolymers are radiation-sensitive and can be used for producing protective layers or relief images, development being carried out in an aqueous alkaline medium.
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: June 21, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: Joseph Berger, Wolfgang Wernet
  • Patent number: 5321121
    Abstract: Poly(biphenylene sulfide/poly(phenylene sulfide) copolymers are produced by contacting a p-dihalobenzene and a bis-p-halobiphenyl under polymerization condiditons. Additionally a poly(biphenylene sulfide)/poly(phenylene sulfide) copolymer/fiber reinforced composite is provided.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: June 14, 1994
    Assignee: Phillips Petroleum Company
    Inventors: Michael C. Yu, Jimmie J. Straw
  • Patent number: 5321116
    Abstract: A process for preparation of a random copolycarbonate from an ortho-substituted dihydric phenol and a non-ortho-substituted dihydric phenol.
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: June 14, 1994
    Assignee: The Dow Chemical Company
    Inventors: Maurice J. Marks, Thoi H. Ho
  • Patent number: 5321114
    Abstract: A composition comprising a copolyestercarbonate derived from a dihydric phenol, a carbonate precursor, and an aliphatic alpha omega dicarboxylic acid or ester precursor wherein the dicarboxylic acid or ester precursor has from 10 to about 20 carbon atoms, inclusive, and is present in the copolyestercarbonate in quantities of from about 2 to 30 mole percent of the dihydric phenol.
    Type: Grant
    Filed: April 8, 1993
    Date of Patent: June 14, 1994
    Assignee: General Electric Company
    Inventors: Luca P. Fontana, Kenneth F. Miller, Christianus A. A. Claesen, Peter W. van Es, Theodorus O. N. de Vroomen, Clayton B. Quinn, Richard W. Campbell
  • Patent number: 5321115
    Abstract: A process for preparing a halogenated polycarbonate wherein phenolic-terminated, halogenated carbonate oligomers are prepared in the presence of a coupling catalyst, and are then condensed by contact with a carbonate precursor.
    Type: Grant
    Filed: June 7, 1993
    Date of Patent: June 14, 1994
    Assignee: The Dow Chemical Company
    Inventors: Maurice J. Marks, John K. Sekinger
  • Patent number: 5319047
    Abstract: The present invention relates to a process for the preparation of N-(hydroxyphenyl)maleamic acid and various dimers and oligomers thereof. The process is characterized by heating, in the absence of any solvent, N-(hydroxyphenyl)maleamic acid at a temperature ranging from about to about C. in the presence of an acid catalyst. This unique process avoids the need to recover expensive highly polar solvents. The present invention also relates to use of these maleimide containing compounds in rubber. The use of the blend of hydroxyphenyl maleimide and the various dimers and low molecular weight oligomers impart superior properties to rubber when compared to the use of hydroxyphenyl maleimide alone in rubber.
    Type: Grant
    Filed: August 27, 1993
    Date of Patent: June 7, 1994
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Lawson G. Wideman, Gordon R. Schorr, George F. Balogh, Denise J. Keith
  • Patent number: 5319145
    Abstract: A method for producing polysuccinimides is provided. A rotary tray operating at an internal temperature of from about 110 to about C. and providing a residence time of from about 1 hour to about 10 hours is used in the polycondensation of one or more amino acids, amic acids or ammonium salts of monoethylenically unsaturated dicarboxylic acids to produce polysuccinimides.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: June 7, 1994
    Assignee: Rohm and Haas Company
    Inventors: Yi H. Paik, Ethan S. Simon, Graham Swift
  • Patent number: 5319065
    Abstract: There is provided a process for producing a polycarbonate resin containing less amounts of a terminal OH group and a residual monomer and having excellent heat resistance efficiently with a simple equipment. Said process comprises emulsifying an oligomer-containing reaction mixture obtained by the reaction of an alkaline aqueous solution of an aromatic dihydroxy compound with phosgene in the presence of an organic solvent, after adding a molecular weight modifier thereto, and performing polymerization while the reaction mixture is allowed to stand still in the emulsified state.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: June 7, 1994
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Shinji Kikumoto, Hiroki Okuyama, Akiyoshi Manabe, Hidekazu Ito
  • Patent number: 5319013
    Abstract: Aramid and polybenzimidazole fibers and films of improved flame resistance are obtained by impregnation with tungsten hexachloride.
    Type: Grant
    Filed: November 10, 1992
    Date of Patent: June 7, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert V. Kasowski, Kiu-Seung Lee
  • Patent number: 5319067
    Abstract: A thermoplastic polymer having a repeating unit of the formula (I), (II), or (III): ##STR1## where LG is a linking group and W is an oligomeric chain selected from the group consisting of polyether, a polythioether, a polyetherthioether, polycarbonyl, or polysulfonyl, or a copolymer thereof.
    Type: Grant
    Filed: April 23, 1992
    Date of Patent: June 7, 1994
    Assignee: Dayco Products, Inc.
    Inventors: Charles M. Lewis, Nasser Pourahmady
  • Patent number: 5317065
    Abstract: The invention relates to biologically degradable polymers, in particular polyaminodicarboxylic acid-co-anhydroaminodicarboxylic acid derivatives, to a process for their preparation and to the use thereof for depot preparations having controlled delivery of active compound.
    Type: Grant
    Filed: March 25, 1993
    Date of Patent: May 31, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Volker Krone, Axel Walch