Patents Examined by T. Mosley
  • Patent number: 5132396
    Abstract: Highly aromatic oligomeric imide-containing phthalonitriles are prepared by reacting an aromatic dianhydride with an aromatic or aliphatic diamine and endcapping the resulting reaction product with 4-aminophthalonitrile. The prepolymers are highly stable to storage. When heated above their melting or softening points, they polymerize to a thermosetting polymeric material useful as an advanced matrix material. In the case where the oligomeric monomers are produced by reacting dianhydrides with aromatic diamines, they polymerize to form high-temperature adhesives.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: July 21, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Teddy M. Keller
  • Patent number: 5130409
    Abstract: Novolak resins are provided which are the condensation product of (a) a phenol, phenol derivative, or mixtures thereof, and (b) a mixture of formaldehyde or a formaldehyde precursor and an aromatic aldehyde. When the aromatic aldehyde is a monohydroxy aromatic aldehyde, the novolak resin is especially useful in positive photoresist formulations.
    Type: Grant
    Filed: November 16, 1990
    Date of Patent: July 14, 1992
    Assignee: Morton International, Inc.
    Inventors: Richard M. Lazarus, Randall Kautz, Sunit S. Dixit
  • Patent number: 5126431
    Abstract: A process is provided for preparing more granular (i.e., higher bulk density) particulate poly(arylene sulfide ketone) or poly(arylene sulfide diketone) resins having associated therewith improved processability and thermal stability, without generating pressures significantly greater than those generated during polymerization reactions of particulate poly(arylene sulfide ketone) or poly(arylene sulfide diketone) resins.
    Type: Grant
    Filed: December 29, 1989
    Date of Patent: June 30, 1992
    Assignee: Phillips Petroleum Company
    Inventor: Afif M. Nesheiwat
  • Patent number: 5124435
    Abstract: Disclosed is a polyester copolymer obtained by reacting (A) a dicarboxylic acid component composed mainly of terephthalic acid or a derivative thereof with (B) a glycol component comprising (B-1) at least 0.5 mole % but less than 15 mole % of an aliphatic diol having 2 to 16 carbon atoms and (B-2) more than 85 mole % but not more than 99.5 mole % of 1,4-cyclohexanedimethanol having a trans form content of at least 80 mole %. This polyester copolymer has a high rate of crystallization and provides a shaped article having a high heat resistance.
    Type: Grant
    Filed: August 28, 1990
    Date of Patent: June 23, 1992
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hiroshi Mori, Naoki Yamamoto, Hitoshi Iwasaki, Noriyuki Taziri
  • Patent number: 5122588
    Abstract: Polyaryl ether ketones which contain units of the formula ##STR1## are prepared by electrophilic polycondensation in an inert solvent in the presence of a Lewis acid and in the presence or absence of a Lewis base using a carbonyl halide as monomer component, said carbonyl halide being an oxalyl dihalide or a mixture thereof with another carbonyl halide.
    Type: Grant
    Filed: February 15, 1990
    Date of Patent: June 16, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Juergen Koch, Gerhard Heinz
  • Patent number: 5122589
    Abstract: Novel low melt viscosity imido prepolymers, well adapted for the production of prepregs and filament wound shaped articles, are prepared by copolymerizing (a) at least one N,N'-bismaleimide with (b) at least one siloxane bismaleimide, (c) at least one aromatic diprimary diamine, (d) optionally, at least one olefinically unsaturated comonomer other than a bisimide, (e) optionally, a catalyst, and (f) either an acrylate or an unhalogenated epoxy resin.
    Type: Grant
    Filed: April 10, 1990
    Date of Patent: June 16, 1992
    Assignee: Rhone-Poulenc Chimie
    Inventors: Yves Camberlin, Philippe Michaud
  • Patent number: 5120606
    Abstract: The invention relates to coatings based on linear, high molecular weight polyarylene sulfides, preferably PPS, by extrusion coating of, for example, elongate stock in the form of, for example, wires, strands, optical fibers, etc.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: June 9, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerwolf Quaas, Erhard Tresper, Klaus Kraft, Klaus Reinking
  • Patent number: 5120824
    Abstract: Curable compositions, characterized in that they contain(a) polyimides of the general formula (I) ##STR1## wherein B represents a divalent moiety containing a carbon-carbon double bond, and wherein A represents an X-valent, but at least divalent, moiety,(b) alkenylphenoximides of the general formula (II) ##STR2## wherein D represents a Y-valent moiety, Y being 1, 2 or 3, and wherein E denotes a moiety having the following formulae ##STR3## wherein R represents an alkyl group with 1 to 6 carbon atoms and R' represents a 1,2- or 2,3-alkenyl group with 3 to 8 carbon atoms.
    Type: Grant
    Filed: December 20, 1989
    Date of Patent: June 9, 1992
    Assignee: Technochemie GmbH Verfahrenstechnik
    Inventors: Horst Stenzenberger, Peter Koenig
  • Patent number: 5120822
    Abstract: In a process for preparing polyesters by mixing at least one non-vicinal aliphatic diol, e.g., 1,4-butanediol or its ester-forming equivalents with at least one dicarboxylic acid, e.g., terephthalic acid or its ester-forming equivalents in the presence of a tetraalkyl titanate catalyst, and adding to the mixture a tetraalkyl zirconate catalyst in amounts such that the ratio of titanium atoms to zirconium atoms is 1.3:1 to 9:1, preferably 1.9:1 to 4.6:1.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: June 9, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Guenther K. Hoeschele, Richard H. McGirk
  • Patent number: 5120803
    Abstract: A resin composition for sealing semiconductors which comprises (a) a modified epoxy resin composed of (i) an epoxy resin having a specific structure or a graft polymer of an epoxy resin having a specific structure and a vinyl polymer and (ii) a silicone polymer in oily state or as particles having an average particle size of not more than 1.0 micron, which are uniformly dispersed in the epoxy resin or the graft polymer, (b) a hardening agent and (c) an inorganic filler, is herein provided. The resin composition for sealing semiconductors exhibits a low thermal expansion coefficient and a low elastic modulus, generates low stress when thermal shock is applied thereto and exhibits high heat resistance during soldering even after moisture absorption. Therefore, if the composition is used to seal large-scale semiconductor devices having high degree of integration or small-sized, thin semiconductors such as flat packages, these semiconductors provide high reliability.
    Type: Grant
    Filed: September 1, 1989
    Date of Patent: June 9, 1992
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Mikio Kitahara, Koichi Machida, Takayuki Kubo, Motoyuki Torikai, Koutarou Asahina
  • Patent number: 5118782
    Abstract: A thermotropic aromatic polyester comprising (a) an aromatic dicarbonyl ingredient comprising recurring aromatic units of the formulae (I) and/or (II): ##STR1## and, optionally, other recurring aromatic dicarbonyl units, (b) an aromatic dioxy ingredient comprising recurring aromatic units of the formula (III) ##STR2## wherein R.dbd.--H, C.sub.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: June 2, 1992
    Assignee: Ube Industries, Ltd.
    Inventors: Akinori Shiotani, Michinori Suzuki, Fumio Matsuo
  • Patent number: 5118783
    Abstract: A monofunctional alcohol or acid is used to chain stop a condensation reaction for preparing a low molecular weight unsaturated polyester resin. The monofunctional acid removes terminal hydroxy groups and replaces them with hydrocarbon groups. The monofunctional alcohol removes terminal carboxy groups and replaces them with hydrocarbon groups. The resulting polyester resins having improved hydrolytic stability. These chain stopped unsaturated polyester resins can be further modified with hydroxy acrylates, other hydroxy terminated polyesters, and diisocyanates to produce resins with excellent water resistance and physical properties for various applications, such as marble/onyx resins, sheet molding compounds, bulk molding compounds and resin transfer molding resins, gel coats, and bowling ball resins.
    Type: Grant
    Filed: September 12, 1990
    Date of Patent: June 2, 1992
    Assignee: Reichhold Chemicals, Inc.
    Inventor: Katari S. Raju
  • Patent number: 5116938
    Abstract: A novel catalyst composition, and a process for using the novel catalyst system to produce polyester is described. The novel catalyst composition is specific for producing polyester from a lower dialkyl ester of a dicarboxylic acid and glycol, wherein the catalyst composition includes from about 20 ppm to about 150 ppm manganese; from about 50 ppm to about 250 ppm lithium; from about 10 ppm to about 40 ppm cobalt; and from about 200 ppm to about 400 ppm antimony, all amounts being based upon the expected yield of the polyester. The process for using the novel catalyst composition to make polyester includes the step of employing an effective catalytic amount of manganese and lithium in an ester interchange reaction from a lower dialkyl ester of a dicarboxylic acid and glycol to produce monomer; and using an effective catalytic amount of cobalt and antimony in the polycondensation reaction to convert the monomer to polyester.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: May 26, 1992
    Assignee: Hoechst Celanese Corporation
    Inventors: Monika Engel-Bader, Bobby N. Furr
  • Patent number: 5115088
    Abstract: 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: Grant
    Filed: October 24, 1990
    Date of Patent: May 19, 1992
    Assignee: Huels Aktiengesellschaft
    Inventors: Gunter Poll, Martin Bartmann, Jurgen Finke
  • Patent number: 5115077
    Abstract: A polyetheric copolymer, a polyetheric block copolymer, and compositions of these copolymers containing:a benzonitrile recurring unit as represented by the following general formula (I): ##STR1## and a benzophenone recurring unit as represented by the following general formula (II): ##STR2## which copolymer has a molar ratio of the recurring unit (I) to a sum of the recurring units (I) and (II), i.e., (I)/[(I)+(II)], in the range from 0.15:1 to 0.40:1, as well as a melt viscosity (zero shear viscosity) at 400.degree. C. in the range from 500 to 100,000 poise.The polyetheric copolymer is crystalline and is a macromolecular compound having excellent heat resistance and mechanical strength.Disclosed herein are methods for the preparation of the polyetheric copolymer, the polyetheric block copolymer and the compositions containing the same.The polyetheric copolymers, the polyetheric block copolymers and their compositions are useful in various fields.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: May 19, 1992
    Assignee: Idemitsu Kosan Company Limited
    Inventors: Shigeru Matsuo, Shigeru Murakami, Shinji Chino, Naoto Yako
  • Patent number: 5114986
    Abstract: Disclosed are mixed halocarbon blowing agents comprising (1) halocarbons boiling below about 10.degree. C., (2) halocarbons boiling between 20.degree. C. and 35.degree. C., and (3) inert organic liquids having a boiling point from about 35.degree. C. to about 125.degree. C.Also disclosed are blends of the above mixed blowing agents with active hydrogen containing compounds, particularly polyols and the rigid closed cell foams prepared from such blends.Up to 60 percent reduction in hard halocarbons is realized with the mixed blowing agents.
    Type: Grant
    Filed: December 18, 1990
    Date of Patent: May 19, 1992
    Assignee: The Dow Chemical Company
    Inventor: Chung-Yuan Lin
  • Patent number: 5115080
    Abstract: This invention relates to thermotropic liquid crystalline polyester compositions containing recurring units derived from 2-methylhydroquinone, terephthalic acid, 2,6-napthalenecarboxylic acid, and hydroquinone, characterized as having a heat distortion temperature of greater than 200.degree. C. and improved elongation. The inclusion of a reinforcing/filling agent selected from the group consisting of glass reinforcing agents, glass fillers, carbon metasilicate, calcium carbonate, talc, titanium dioxide, and calcined aluminum silicate in said compositions, and also in those same compositions lacking recurring units of hydroquinone, results in an improvement in the elongation of said compositions. The inclusion of carbon fiber into these compositions results in no significant decrease in the elongation of said compositions. The compositions are useful as films, fibers, and shaped articles.
    Type: Grant
    Filed: October 24, 1990
    Date of Patent: May 19, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Marion G. Waggoner, Michael R. Samuels
  • Patent number: 5115090
    Abstract: Viscosity stable, essentially gel-free linear polyamic acids are provided by a process utilizing offset stoichiometry. Polyimides formed from such polyamic acids have low TCE and low dielectric constants.Methods for improved adhesion of polyimides are also disclosed.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: May 19, 1992
    Inventors: Krishna G. Sachdev, John P. Hummel, Ranee W. Kwong, Robert N. Lang, Leo L. Linehan, Harbans S. Sachdev
  • Patent number: 5115076
    Abstract: Aromatic polyether ketones based on 5 to 90 mol-%, based on the total quantity of all bisphenols, of special dihydroxydiphenyl cycloalkanes and 10 to 95% phthaleins, a process for their production and their use as molding compounds.
    Type: Grant
    Filed: May 21, 1990
    Date of Patent: May 19, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Knud Reuter, Wolfgang Jilge, Bernd Pittel, Gunther Weymans
  • Patent number: 5112941
    Abstract: An aromatic polyimide separation membrane prepared by subjecting an aromatic polyimide membrane to fluorine treatment with an active fluorine is described. The aromatic polyimide separation membrane according to the present invention has an extremely high selectivity and gas permeability, and therefore, is useful as a membrane for separation of gas mixtures or liquid mixtures.
    Type: Grant
    Filed: June 27, 1990
    Date of Patent: May 12, 1992
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Tetsuo Kasai, Yoshiteru Kobayashi