Patents Examined by Sam Acquah
  • Thermoplastic copolyester compositions modified with epoxide compounds
    Patent number: 6027818
    Abstract: Copolyether ester elastomers are provided which contain epoxide compounds. The compositions show improved bloom resistance in the presence of diamines with minimum increase in melt viscosity. Also disclosed are methods to improve appearance and eliminate bloom from finished products comprising thermoplastic copolyesters by lowering the level of acid terminated oligomers in the thermoplastic copolyesters with epoxide compounds.
    Type: Grant
    Filed: June 11, 1999
    Date of Patent: February 22, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: James Michael McKenna
  • Resin composition
    Patent number: 5691426
    Abstract: A resin composition useful as a binder is provided comprising a mixture of a formaldehyde-based resin with a resin substitute comprising the reaction product of an amine derivative chosen from melamine, glycolurile or their mixtures with 1 to 2 moles of a C.sub.1 to C.sub.8 dialkoxyethanal, the reaction product is mixed, preferably reacted, with a polyol.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: November 25, 1997
    Assignee: Sequa Chemicals, Inc.
    Inventor: William Floyd
  • Water-soluble or water-dispersible polyester sizing compositions
    Patent number: 4977191
    Abstract: A water-soluble or water-dispersible polyester resin composition, suitable for textile sizing applications, comprises a reaction product of 20-50% by weight of waste terephthalate polymer, 10-40% by weight of at least one glycol and 5-25% by weight of at least one oxyalkylated polyol. Preferred compositions also comprise 20-50% by weight of isophthalic acid. A further water-soluble or water-dispersible resin comprises a reaction product of 20-50% by weight of waste terephthalate polymer, 10-50% by weight of at least one glycol and 20-50% by weight of isophthalic acid.
    Type: Grant
    Filed: June 27, 1989
    Date of Patent: December 11, 1990
    Assignee: The Seydel Companies, Inc.
    Inventor: Robert K. Salsman
  • Preparation of aqueous polyester dispersions and use thereof
    Patent number: 4943602
    Abstract: Aqueous polyester dispersions are prepared by(a) condensing an aromatic dicarboxylic acid or ester with at least one diol to give a prepolymer having an acid number of from 2 to 8,(b) reacting the prepolymer with at least one molecular weight enhancer compound, e.g. trimellitic anhydride to give a polyester having an acid number of from 40 to 60, and(c) dispersing the polyester in an aqueous medium to form an aqueous dispersion by adding an aqueous mixture of ammonia and an amine in a molar ratio of from 10:1 to 1:10 to a melt of the polyester which has a temperature within the range from 150.degree. to 230.degree. C.,and are used as sizes for sizing filament warp yarns.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: July 24, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Ralf Brueckmann, Heinz Leitner, Holger Schoepke