Patents Examined by S. A. Acquah
  • Treatment of hazardous materials with aqueous air foam of polyhydroxy polymer
    Patent number: 5026735
    Abstract: A method of treating hazardous material or other substrate with an aqueous air foam, comprising the steps of (1) preparing an aqueous solution or dispersion comprising (a) water-soluble polyhydroxy polymer having a plurality of hydrogen-bondable 1,2- and/or 1,3-diol structures capable of complexation with the borate anion, B(OH).sub.4.sup.
    Type: Grant
    Filed: June 12, 1990
    Date of Patent: June 25, 1991
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard M. Stern
  • Process for continuous mixing of a two-liquid curing type resin
    Patent number: 5026820
    Abstract: Disclosed is a process for continuously mixing two liquid components, whose one liquid component is a two-liquid curing type resin which comprises continuously supplying one liquid component under stirring into a mixing container and pouring the other liquid component into said container by pushing open a needle forcibly provided to a check valve, the improvement wherein said needle is pushed open with a non-curing liquid, thereafter, a curing liquid is poured into said mixing container. According to the present invention, when, for example, a polyamide acid and a curing agent are caused to mix and react with each other, a transparent polyimide mixed uniformly is obtained and high quality molded articles of polyimide are provided therefrom.
    Type: Grant
    Filed: April 11, 1989
    Date of Patent: June 25, 1991
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takehiko Noguchi, Takashi Sakubata, Akinori Hisanaga, Tetsuo Yoshioka, Hirosaku Nagano
  • Flame-retardant halogenated copolyester and electric wire coated with the same
    Patent number: 5021545
    Abstract: The present invention provides a novel flame-retardant halogenated copolyester containing a branched or crosslinked structure to an extent such that it will not impair the solubility of the copolyester in solvent to thereby reduce the lowering in the softness caused by thermal history. Therefore, this copolyester and a composition comprising the same are particularly useful as a coating material for an electric wire to be used in the vicinity of a heat source or in an environment in danger of heat buildup.
    Type: Grant
    Filed: October 11, 1990
    Date of Patent: June 4, 1991
    Assignee: Polyplastics Co., Ltd.
    Inventors: Toshio Nakane, Michiro Naka, Hiroaki Konuma, Kenji Hijikata
  • Polyester polymers and aqueous dispersions thereof
    Patent number: 5021544
    Abstract: A water dispersible polyester polymer is described having one or more polyester chains and one or more non-ionic polyoxyalkylene chains in which at least 40% of the repeating oxyalkylene units are oxyethylene units. The polyester polymer has a structure in which one or more of the polyoxyalkylene chains are pendent to at least one of the polyester chains. The poloxyalkylene chains provide the polyester with non-ionic stabilization enabling the polyester to form aqueous dispersions which possess good colloid stability.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: June 4, 1991
    Assignee: Imperial Chemical Industries PLC
    Inventors: John C. Padget, David A. Pears
  • Novel compolymers and electroactive polymers derived therefrom
    Patent number: 5006633
    Abstract: An electroactive polymer is obtained by doping a copolymer represented by the following general formula (I): ##STR1## wherein R.sup.1 is hydrogen or a hydrocarbon residue having 1 to 20 carbon atoms; R.sup.2 is hydrogen, a hydrocarbon residue having 1 to 20 carbon atoms, furyl, pyridyl, nitrophenyl, chlorophenyl, or methoxyphenyl; l is an integer not smaller than 2; m is an integer not smaller than 1; and n is an integer not smaller than 2.
    Type: Grant
    Filed: August 18, 1989
    Date of Patent: April 9, 1991
    Assignee: Nippon Oil Company, Limited
    Inventors: Yutaka Shikatani, Naoki Kataoka, Yoshiyuki Shimo, Nobuyuki Kuroda, Kazuo Matsuura
  • Isocyanate prepolymers
    Patent number: 5004794
    Abstract: New isocyanate prepolymers obtainable from polyethers and/or polyesters containing 2 OH groups and diisocyanates and triols in a two-step process and their use as principal component in sealing compounds, adhesives and coating compositions.
    Type: Grant
    Filed: December 4, 1987
    Date of Patent: April 2, 1991
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Winfried Emmerling, Juergen Wichelhaus, Tore Podola
  • Preparation of polyethylene terephthalate
    Patent number: 5001216
    Abstract: A process is disclosed for preparing polyethylene terephthalate having a predetermined intrinsic viscosity which involves the direct esterification of terephthalic acid with ethylene glycol followed by the polycondensation of the esterification product using a polycondensation catalyst system containing cobalt, manganese-, and antimony-containing components.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: March 19, 1991
    Assignee: Amoco Corporation
    Inventors: David E. James, Lawrence G. Packer
  • Thermo-shrinkable polyester film
    Patent number: 4996291
    Abstract: A thermo-shrinkable polyester film of this invention is obtained from a composition that comprises acid components including terephthalic acid and glycol components including ethyleneglycol. The polyester film has a heat-shrinkage ratio of 30% or more in a certain direction at 100.degree. C., and a shrinkage ratio of 5% or more at the point of intersection of a curve showing the internal shrinkage stress of the film and a curve showing the tensile stress of the film.
    Type: Grant
    Filed: September 8, 1989
    Date of Patent: February 26, 1991
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Yasuo Yoshinaka, Katsuaki Kuze, Tsutomu Isaka, Toshihiro Yamashita, Yujiro Matsuyama, Koichiro Nakamura, Tsuyoshi Matsunaga, Osamu Makimura
  • Water-dilutable air-drying protective coating compositions
    Patent number: 4996250
    Abstract: The invention relates to water-dilutable, air-drying protective coating compositions based on a combination of select water-dilutable alkyd resins with aqueous polymer dispersions and maleinized oils or fatty acids. The products are used with or without pigments, extenders and/or paint adjuvants or additives, depending on the particular end application, as air-drying protective coating compositions for wood and metal substrates, particularly for brushing lacquers and wood varnishes.
    Type: Grant
    Filed: August 30, 1989
    Date of Patent: February 26, 1991
    Assignee: Vianova Kunstharz, A.G.
    Inventors: Rami-Raimund Awad, Gert Dworak, Bertram Zuckert, Walter Weger
  • Polyester amides containing imide groups, process for their production and their use as hot-melt adhesives
    Patent number: 4996290
    Abstract: The invention relates to polyester amide imides produced by condensation of a dimerized fatty acid, and optionally straight-chain aliphatic and/or aromatic dicarboxylic acids having from 6 to 13 carbon atoms, trimellitic anhydride, aliphatic diamines having from 2 to 12 carbon atoms, and either a mixture of isomers of 3,8-dihydroxymethyltricyclo[5.2.1.0.sup.2,6 ]decane 3,9-dihydroxymethyltricylo[5.2.1.0.sup.2,6 ]decane 4,9-dihydroxymethyltricyclo-[5.2.1.0.sup.2,6 ]decane, 4,8-dihydroxymethyltricyclo[5.2.1.0.sup.2,6 ]decane and/or 1,4-dihydroxymethylcyclohexane.
    Type: Grant
    Filed: February 28, 1990
    Date of Patent: February 26, 1991
    Assignee: Schering AG
    Inventors: Manfred Bolze, Manfred Drawert
  • Segmented thermoplastic copolyesters endowed with elastomeric properties
    Patent number: 4994549
    Abstract: Segmented thermoplastic copolyesters having elastomeric properties, containing from 25% to 80% by weight of short-chain polyester units derived from dicarboxylic acids and a diol, and from 20 to 70% by weight of long-chain polyester units derived from dicarboxylic acids and poly(alkylene oxide)-glycols in which at least 10% by weight of the poly-(alkylene oxide)-glycols has a molecular weight lower than 300, and a C/O ratio within the range of from 1.8 to 4.3.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: February 19, 1991
    Assignee: Ausimont S.r.l.
    Inventors: Antonio Chiolle, Gian P. Maltoni, Romolo Stella
  • Production process for polyimide fibers
    Patent number: 4994544
    Abstract: A process for the production of polyimide fibers and polyimide fibers obtained by the process. The process includes thermal or chemical imidation of a polyamic acid which has been obtained by reacting a specific diamine and a particular tetracarboxylic dianhydride in the presence of a dicarboxylic anhydride represented by the following formula: ##STR1## wherein Z represents a divalent group selected from the group consisting of monocyclic aromatic groups, fused polycyclic aromatic groups and non-fused polycyclic aromatic groups with aromatic rings bonded together directly or via a crosslinking member.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: February 19, 1991
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Taizo Nagahiro, Masahiro Ohta, Shuichi Morikawa, Nubohito Koga, Shoji Tamai
  • Producing a copolyester from a lower dialkyl ester of terephthalic acid, a glycol and a dicarboxylic acid
    Patent number: 4990594
    Abstract: A process for producing a copolyester by copolymerizing the monomers from the ester interchange of a lower dialkyl ester of terephthalic acid and glycol and the direct esterification of a dicarboxylic acid and glycol using a novel catalyst system. The novel catalyst composition includes from about 20 ppm to about 150 ppm manganese; from about 50 ppm to about 350 ppm lithium; preferably from about 10 ppm to about 70 ppm cobalt; and from about 200 ppm to about 400 ppm antimony, all amounts being based upon the expected yield of the copolyester.
    Type: Grant
    Filed: March 7, 1990
    Date of Patent: February 5, 1991
    Assignee: Hoechst Celanese Corporation
    Inventors: Anthony W. Cooke, Monika E. Bader
  • Polyetheramide hotmelt-adhesives
    Patent number: 4985534
    Abstract: This invention relates to modified polyetheramide hotmelt adhesives showing reduced melt viscosity and, optionally, better adhesive properties and to their use as ingredients for hotmelt adhesives.
    Type: Grant
    Filed: February 2, 1990
    Date of Patent: January 15, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Detlef Heinz, Eduard Hansel, Rolf-Volker Meyer, Gunter Arend
  • Non-aqueous dispersions
    Patent number: 4983716
    Abstract: This invention relates to high solids alkyds, non-aqueous dispersions, and coating compositions containing those alkyds and non-aqueous dispersions, having non-volatile materials contents greater than about 75% NVM, with very low volatile organic contents of less than 305 g/l, which exhibit excellent stability, viscosity and tack-free and dry times when formulated as air dry coating compositions.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: January 8, 1991
    Assignee: The Sherwin-Williams Company
    Inventors: Madhukar Rao, Richard F. Tomko, Daniel R. Sayre
  • Water reducible polyester resin composition and method for preparing same
    Patent number: 4981905
    Abstract: High molecular weight, water reducible or dispersible polyester resin compositions are prepared by dispersing a molten carboxyl-containing polyester in water and chain extending it with an epoxide. The dispersions are useful as sizes for textiles and as coatings.
    Type: Grant
    Filed: February 21, 1989
    Date of Patent: January 1, 1991
    Assignee: Morton International, Inc.
    Inventors: James B. Simons, Barton L. Hedrick
  • Copolyester and polyester film having said copolyester as subbing layer
    Patent number: 4978740
    Abstract: There is disclosed a copolyester which comprises at least four compositions of: (A) terephthalic acid, and/or its ester forming derivative (terephthalic acid component) and isophthalic acid and/or its ester forming derivative (isophthalic acid component) with a molar ratio of 30/70 to 70/30; (b) 5 to 15 mole % of a dicarboxylic acid having sulfonate group and/or its ester forming derivative based on the all dicarboxylic acid components; (C) an alicyclic dicarboxylic acid and/or its ester forming derivative; and (D) 50 mole % of ethylene glycol based on the all glycol components; and a polyester film which comprises a subbing layer containing the copolyester provided on at least one side of a polyester film base.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: December 18, 1990
    Assignees: Kanebo, Ltd., Konica Corporation
    Inventors: Hitoshi Kawamoto, Yoshimichi Ozawa, Hiroshi Naito, Yoshihiro Wada, Toshiaki Yamazaki, Ichiya Harada
  • Polyvinyl chloride plastisol composition
    Patent number: 4977201
    Abstract: The present invention provides a polyvinyl chloride plastisol composition characterized by containing a specified epoxy resin, a blocked isocyanate and, if necessary, a latent curing agent for an epoxy resin as tackifiers. This plastisol composition is excellent in storage stability and can strongly adhere to various metals and various undercoate of metals (such as electro-deposit) by baking even at a relatively low temperature to give a coating which is free from blowing and exhibits excellent adhesion after the immersion in hot water or the heating. Therefore, the composition is useful as a body sealer or undercoat for an automotive body.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: December 11, 1990
    Assignees: Asahi Denka Kogyo K.K., A,C,R. Co., Ltd.
    Inventors: Akio Ogawa, Masahiko Shimada, Kazuhiko Ando
  • Process for manufacturing urea/formaldehyde resins
    Patent number: 4977237
    Abstract: New process for manufacturing urea/formaldehyde resins.New process, according to which a urea/formaldehyde precondensate containing monomethylolacrylamidomethyleneurea is added to the urea/formaldehyde resins.Applications for the gluing of wood, in aminoplastic resins.
    Type: Grant
    Filed: November 29, 1989
    Date of Patent: December 11, 1990
    Assignee: Norsolor S.A.
    Inventors: Roger Garrigue, Jack Lalo
  • Weather-resistant polyacetal resin composition and molded articles therefrom
    Patent number: 4975478
    Abstract: The weather and UV-light resistance of polyacetal resin compositions is improved by incorporating into polyacetal resin a stabilizing package comprised of at least one stabilizing agent selected from benzotriazoles, benzophenones, aromatic benzoates, cyanoacrylates, oxalanilides, and hindered amines, and an acylate resin selected from homopolymers or copolymers of acrylic or methacrylic acid, and ester derivatives thereof.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: December 4, 1990
    Assignee: Polyplastics Co., Ltd.
    Inventor: Sadatsugu Okuda