Patents Examined by Sam Acquah
  • Novel copolyesters and their use in compostable products such as disposable diapers
    Patent number: 5097005
    Abstract: The invention provides novel copolyesters, fibers and films, nonwovens from the fibers and disposable products of the copolyesters such as diapers. The products are degradable under the conditions typically existing in waste composting processes, have low ingredient costs and yet provide strength and toughness properties adequate for end uses such as in disposable diapers. The copolyesters are based upon polyethylene terephthalate copolymerized with a 5-sulfoisophthalic acid and, if desired, a polyethylene ether, such as diethylene glycol, and include units from hydroxyacids selected for their melting points being lower than their decomposition temperatures.
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: March 17, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Raymond F. Tietz
  • Novel polyesters and their use in compostable products such as disposable diapers
    Patent number: 5097004
    Abstract: The invention provides a novel polyesters, fibers and films, nonwovens from the fibers and disposable products of the polyesters such as diapers. The products are degradable under the conditions typically existing in waste composting processes, have low ingredient costs and yet provide strength and toughness properties adequate for end uses such as in disposable diapers. The polyesters are based upon polyethylene terephthalate copolymerized with a polyethylene glycol and a 5-sulfoisophthalic acid and, if desired, a polyethylene ether such as diethylene glycol.
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: March 17, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Francis G. Gallagher, Cathy J. Hamilton, Raymond F. Tietz
  • Polyester copolymer
    Patent number: 5095089
    Abstract: Disclosed is a polyester copolymer obtained by reacting (A) a dicarboxylic acid component composed mainly of terephthalic acid or its derivative with (B) a glycol component comprising 15 to 85 mole % of (B-1) an aliphatic diol having 2 to 16 carbon atoms and 85 to 15 mole % of (B-2), 1,4-cyclohexanedimethanol in which the content of the trans-form is at least 80 mole %. This polyester copolymer has a low rate of crystallization and provides a shaped article having a high heat resistance.
    Type: Grant
    Filed: August 28, 1990
    Date of Patent: March 10, 1992
    Assignee: Mitsubishi Rayon Company, Ltd.
    Inventors: Hiroshi Mori, Naoki Yamamoto, Hitoshi Iwasaki, Noriyuki Taziri
  • Maleinized rosin containing solvent-borne alkyd resin compositions
    Patent number: 5093463
    Abstract: Solvent-borne alkyd resin compositions are disclosed comprising a high-purity maleinized rosin anhydride. Substitution of the trifunctional acid component of the alkyd resin composition with this rosin anhydride permits a reduction in the viscosity of the resin without adversely affecting the physical properties of the cured film of the resin.
    Type: Grant
    Filed: January 14, 1991
    Date of Patent: March 3, 1992
    Assignee: Westvaco Corporation
    Inventors: David E. Knox, Timothy B. Cameron
  • Book or other graphic arts construction using adhesive resistant to cold flow
    Patent number: 5090861
    Abstract: In the construction of a hard cover book or in the hinge application of a soft book cover or another graphic arts construction of this invention can be manufactured more efficiently with substantial resistance to cold flow or creep through the use of a single adhesive. The adhesive of choice for this application has an enhanced resistance to cold flow or creep, sufficiently high bond strength, and a viscosity that is controllable through a temperature range permitting it to be used for a variety of graphic arts construction applications.
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: February 25, 1992
    Assignee: H. B. Fuller Licensing & Financing
    Inventors: David B. Malcolm, William L. Bunnelle
  • Process for improving the properties of polymers
    Patent number: 5091508
    Abstract: This invention relates to a process of modifying the crystallization temperature (T.sub.cc) of polymers, such as polyesters or polyamides, the polymers produced by this process and the molding compositions containing these polymers. The process comprises cooling a polymer to a temperature sufficient to allow grinding of the polymer to an effective particle and then grinding said polymer to the effective particle size in order that the polymer exhibits an increased T.sub.cc.
    Type: Grant
    Filed: May 8, 1991
    Date of Patent: February 25, 1992
    Inventors: Yash P. Khanna, Annemarie C. Reimschuessel
  • Process for preparing 2H-1-benzopyran-2-ones and polyesters containing 2H-1-benzopyran-2-one residues
    Patent number: 5091501
    Abstract: This invention provides a process for producing 2H-1-benzopyran-2-ones (coumarins) from optionally-substituted o-halocinnamic acids or esters under polyester-forming conditions. When the coumarins contain appropriately reactive functional groups, and desired monomers are present, a colored or UV-absorbing coumarin/polyester copolymer is provided in one step.
    Type: Grant
    Filed: October 4, 1990
    Date of Patent: February 25, 1992
    Assignee: Eastman Kodak Company
    Inventors: Max A. Weaver, Samuel D. Hilbert, Wayne P. Pruett, Clarence A. Coates, Jr.
  • Continuous polymerization device and continuous polymerization method
    Patent number: 5091503
    Abstract: A continuous polymerization device is equipped with a stirring mechanism which possesses a drive shaft parallel to the direction of flow, a multiple number of polymerization precursor supply ports in the direction of flow, and at least one polymerization product output port at its latter portion, and possessing mixing capability with respect to the radial direction while possessing no actual mixing capability with respect to the direction of flow, in a continuous polymerization device which functions by piston flow.
    Type: Grant
    Filed: August 16, 1989
    Date of Patent: February 25, 1992
    Assignee: Kao Corporation
    Inventors: Hiroshi Inatome, Kazunari Inaguma, Hiroaki Yamaguchi, Yasuhisa Ohtani
  • Endcapped, chain-extended and branched polyesters
    Patent number: 5089598
    Abstract: Silane esters are transesterified with hydroxyl-terminated polyester resins to obtain end-capped, extended or branched polyester molding compositions.
    Type: Grant
    Filed: October 5, 1990
    Date of Patent: February 18, 1992
    Assignee: General Electric Company
    Inventors: Christopher M. Hawkins, Edgar E. Bostick, James L. Derudder
  • Liquid crystalline compounds, their production and their use as modifiers for polycarbonates, polyester carbonates and polyesters
    Patent number: 5089590
    Abstract: The present invention relates to aromatic compounds corresponding to formula (I) ##STR1## to their production and to their use as modifiers for thermoplastic aromatic polycarbonates and/or thermoplastic aromatic polyester carbonates and/or thermoplastic aromatic polyesters.
    Type: Grant
    Filed: January 18, 1991
    Date of Patent: February 18, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Harald Pielartzik, Rolf-Volker Meyer, Ralf Dujardin, Axel Schnitzler, Hans-Joachim Traenckner
  • Thermotropic, fully aromatic polycondensates, a process for their preparation and their use for the production of moulded articles, fibres, filaments, sheet products and films
    Patent number: 5084547
    Abstract: The thermotropic, fully aromatic polycondensates according to the invention, which contain compounds capable of complex formation, are distinguished by improved resistance to hydrolysis and may be used for the production of moulded articles, fibres, filaments, sheet products and films.
    Type: Grant
    Filed: September 11, 1990
    Date of Patent: January 28, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Harald Pielartzik, Hermann Brinkmeyer, Rolf-Volker Meyer, Bernd Willenberg
  • Preparation of open chain poly(Reissert compounds)
    Patent number: 5081219
    Abstract: An open chain poly Reissert can be formed by the initial reaction of an aromatic dialdehyde (e.g., terephthaldicaboxaldehyde) and ammonia or a primary amine (e.g., methylamine) to form a reaction product which is then reacted with an aliphatic acid chloride (e.g., adipoyl chloride).
    Type: Grant
    Filed: October 3, 1990
    Date of Patent: January 14, 1992
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Harry W. Gibson, H. R. Jois Yajnanarayana
  • Copolyesters of 4,4'-biphenyldicarboxylic acid, 1,4-butanediol and ethylene glycol
    Patent number: 5081220
    Abstract: Disclosed are polyesters comprised primarily of residues of 4,4'-biphenyldicarboxylic acid, ethylene glycol and 1,4-butanediol. Articles injection-molded from the polyesters exhibit a unique combination of properties including unusually high tensile strength and excellent heat resistance, flexural modulus and resistance to chemicals and solvents.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: January 14, 1992
    Assignee: Eastman Kodak Company
    Inventors: John C. Morris, Winston J. Jackson, Jr.
  • Process for the preparation of an aromatic polyether
    Patent number: 5081214
    Abstract: A process for the preparation of an aromatic polyether by condensation of dihydric phenols with activated aromatic dihalo compounds or by self-condensation of polynuclear activated halophenols employs a mixture of sodium carbonate and sodium hydrogen carbonate as a condensation auxiliary.By this means, the relatively low reactivity of the sodium carbonate is enhanced and the reaction rate is significantly increased.
    Type: Grant
    Filed: August 7, 1990
    Date of Patent: January 14, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Arnold Schneller
  • Polyester polyols from tall oil fatty acid, maleic anhydride, and aromatic polyester polyols
    Patent number: 5075417
    Abstract: Polyester polyols are prepared by reacting a multifunctional adduct (e.g., maleic anhydride (MA)) and tall oil fatty acid, (TOFA), and then esterifying/transesterifying the MA/TOFA reaction product with an excess of aromatic polyester polyols (preferably such polyols are produced from dimethyl terephthalate (DMT) process residue and polyhydric alcohols). The polyester polyols may be used in the manufacture of rigid polyurethane (PUR) and rigid urethane-modified polyisocyanurate (PUR/PIR) foams.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: December 24, 1991
    Assignee: Cape Industries
    Inventors: John M. Trowell, Billy S. Jessup, Jr.
  • Highly elastic ionic dye-dyeable polyether-ester block copolymer filaments
    Patent number: 5070178
    Abstract: A polyether-ester block copolymer, and filaments formed therefrom, having an enhanced thermal stability of the elastic property thereof and a satisfactory dyeing property, comprises a polymerization product of (A) an acid component comprising as a major ingredient, terephthalic acid, (B) a phosphonium sulfate component comprising a compound of the formula (I): ##STR1## wherein Z.sub.1 =tri- or more valent aromatic or aliphatic group, A.sub.1 =ester-forming group, A.sub.2 =H or ester-forming group, R.sup.1, R.sup.2, R.sup.3, R.sup.4 =alkyl or aryl radical and n=a positive integer, (C) a polymeric glycol component comprising a polyoxyalkylene glycol having an MW of 400 to 6000 and (D) a monomeric glycol component comprising, as a major ingredient, 1,4-butane diol, in which the copolymer component (B) is in an amount of from 0.
    Type: Grant
    Filed: September 4, 1990
    Date of Patent: December 3, 1991
    Assignee: Teijin Limited
    Inventor: Hironori Yamada
  • Low free formaldehyde melamine-formaldehyde detackifier and method of using
    Patent number: 5068279
    Abstract: A melamine-formaldehyde detackifer having less than 0.15% free formaldehyde comprises a melamine-formaldehyde polymer detackifier to which has been added a formaldehyde scavenging agent comprising an effective amount of urea, and an enhancer selected from glyoxal and acetylacetone. The use of the low free formaldehyde detackifier is also described.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: November 26, 1991
    Assignee: Calgon Corporation
    Inventor: Lewis D. Morse
  • Benzophenone-type polyimides and their production
    Patent number: 5064933
    Abstract: Benzophenone-type polyimides having repeating groups of the formula ##STR1## where Y and Y' are the same or different and are a chemical bond, --O--, --S--, ##STR2## --CH.sub.2 --, --C(CH.sub.3).sub.2 --, --CF.sub.2, --C(CF.sub.3).sub.2 -- or --Si(CH.sub.3).sub.
    Type: Grant
    Filed: September 4, 1990
    Date of Patent: November 12, 1991
    Assignee: Ethyl Corporation
    Inventor: Mark W. Beltz
  • Thermosetting polyimide schiff base resins, their preparation and their applications
    Patent number: 5064934
    Abstract: Thermosetting Schiff base resins, their preparation and their applications re described.These thermosetting Schiff base resins can be defined as responding to the general formula: ##STR1## Radicals Ar.sub.1, Ar.sub.2 and Ar.sub.3 are chosen so that the softening temperature of the resins is less than about 150.degree. C.The resins can be prepared by direct condensation of an ethynyl benzaldehyde or acetophenone on a telechelic diamine oligomer obtained by reaction of a diamine containing flexibilizing groups on a derivative of benzhydrol tetracarboxylic acid. These Schiff base resins can be used by bulk thermal polymerization particularly to prepare adhesives or composite matrices.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: November 12, 1991
    Assignee: Centre d'Etude des Materiaux Organiques pour Technologies Avancees
    Inventors: Regis Mercier, Thierry Pascal, Bernard Sillion
  • Size for carbon fibers and glass fibers
    Patent number: 5063261
    Abstract: A size for carbon fibers and glass fibers comprises an epoxy resin and a polyester with a hydrophilic and a hydrophobic moiety in the molecule.
    Type: Grant
    Filed: April 18, 1990
    Date of Patent: November 5, 1991
    Assignee: BASF Aktiengesellschaft
    Inventors: Joerg Kroker, Silvio Vargiu