Patents Examined by Melvin Goldstein
  • Patent number: 4035343
    Abstract: Permanently flame-resistant synthetic linear polyesters are obtained by irporating by condensation into the polyester composed of the usual dicarboxylic acid and diol units an alkylphosphine oxide of the formula ##SPC1##Wherein the radicals R to R.sub.4 represent organic radicals of which R.sub.2, R.sub.3 and Z may be substituted by 2 hydroxyl groups altogether, R.sub.2, R.sub.3 and R.sub.4 may also represent hydrogen and a is zero or a whole number of from 1 to 4. The flame-resistant polyesters are processed into shaped structures such as fibers, filaments, sheets, injection and compression molded articles characterized by good flameproofness and dyeing properties.
    Type: Grant
    Filed: August 23, 1973
    Date of Patent: July 12, 1977
    Assignee: Farbwerke Hoechst Aktiengesellschaft vormals Meister Lucius & Bruning
    Inventors: Ulrich Bollert, Hans-Jerg Kleiner, Franz Jakob
  • Patent number: 3947396
    Abstract: Fluid, stable compositions containing aqueous disperse systems of anionizable material, e.g., a latex of an organic polymer having carboxylate functionality, and a water-dispersible amphoteric polyelectrolyte, e.g., a copolymer of 2-aminoethyl methacrylate and methacrylic acid, are coacervated by maintaining the pH of the composition at a value below the isoelectric point of the amphoteric polyelectrolyte and a value at which the disperse material contains anions.
    Type: Grant
    Filed: August 19, 1974
    Date of Patent: March 30, 1976
    Assignee: The Dow Chemical Company
    Inventors: Donald A. Kangas, W. Robert Neuendorf
  • Patent number: 3947351
    Abstract: An acid diffusion-dialysis membrane, which can be used for separating an acid from a mixture of an acid and a salt, or a mixture of an acid and a water-soluble organic compound, e.g., glucose, by non-electrolytic dialysis, is prepared by forming a film from the combination of (I) a vinyl group containing benzene monomer or a vinyl group containing pyridine monomer, (II) a non-conjugated divinyl-containing monomer, and (III) a thermoplastic polymer which is swellable or soluble in the monomer mixture, polymerizing said monomer mixture in the film, and then introducing anion exchange groups into the resulting polymerized product. The acid diffusion-dialysis membrane is characterized by a high acid diffusion-dialysis coefficient and a high acid-salt selectivity ratio, and further by a relatively high mechanical strength.
    Type: Grant
    Filed: May 24, 1973
    Date of Patent: March 30, 1976
    Assignee: Asahi Glass Company, Ltd.
    Inventors: Tatsuro Asawa, Tomoki Gunjima
  • Patent number: 3931058
    Abstract: Compounds of aromatic amines with polycarboxylic acids which possess at least 2 glycidyl groups bonded to the nitrogen atoms of the amide groups, such as, for example, N,N'-diglycidylsebacic acid dianilide or N,N'-diglycidyltetra-hydrophthalic acid dianilide. These compounds, together with curing agents for epoxide resins, are suitable for the manufacture of mouldings, coatings or adhesive bonds.
    Type: Grant
    Filed: December 20, 1973
    Date of Patent: January 6, 1976
    Assignee: Ciba-Geigy AG
    Inventors: Hans Batzer, Juerger Habermeier, Daniel Porret