Patents Examined by V. P. Hoke
  • Food-grade vinyl halide polymer compositions stabilized with monoalkyltin compounds
    Patent number: 4379878
    Abstract: Monoalkyl tin derivatives of mercaptoacetic acid esters, such as mono-n-octyltin-S,S', S"-tris(isooctyl mercaptoacetate), are useful as food-grade stabilizers for vinyl halide polymers.
    Type: Grant
    Filed: October 13, 1981
    Date of Patent: April 12, 1983
    Assignee: M&T Chemicals Inc.
    Inventor: William A. Larkin
  • Flame retardant tetrabromophthalic acid esters useful in synthetic resins
    Patent number: 4376837
    Abstract: Tetrabromophthalic acid esters of pentabromobenzyl alcohol with a softening temperature of 270.degree.-280.degree. C. and a bromine content of about 75% by weight and of a tetrakis(bromomethyl)-o-xylylene glycol with a softening temperature of 220.degree.-230.degree. C. and a bromine content of about 67% by weight are good flame retardants for synthetic resins.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: March 15, 1983
    Assignee: Chemische Fabrik Kalk GmbH
    Inventors: Herbert Jenkner, Robert Strang
  • Triazylaminotriazines, their preparation and their use for stabilizing synthetic polymers
    Patent number: 4376836
    Abstract: Triazinylaminotriazines of the general formula ##STR1## which are used as stabilizers for polymers, are prepared by reacting a cyanuric halide with amines containing triazinyl and polyalkylpiperidylamino groups.
    Type: Grant
    Filed: July 13, 1981
    Date of Patent: March 15, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hartmut Wiezer, Gerhard Pfahler
  • Thioglycolate and thiopropionate secondary stabilizers
    Patent number: 4374945
    Abstract: Certain substituted thioglycolates and thiopropionates were found useful as secondary stabilizers for polymers, particularly polyvinyl chloride, when used in conjunction with metal octanoates, such as zinc octanoate, as the primary stabilizer. The specific thioglycolates and thiopropionates are those formed by thio adducts to the double bond of a monomer, such as the product of reacting isooctyl thioglycolate with glycidyl acrylate, to provide isooctyl S-2(glycidyloxycarbonyl)ethyl thioglycolate, as an example.
    Type: Grant
    Filed: March 11, 1981
    Date of Patent: February 22, 1983
    Assignee: Witco Chemical Corporation
    Inventors: Koei-Liang Liauw, Michael H. Fisch
  • Method for the thermal stabilization of sulfur-vulcanizable elastomers of thiodiethanol
    Patent number: 4374947
    Abstract: A method of improving the thermal stability of sulfur-vulcanizable elastomers by incorporating copper salts therein, is disclosed.
    Type: Grant
    Filed: May 24, 1982
    Date of Patent: February 22, 1983
    Assignee: American Cyanamid Company
    Inventors: Richard B. Toothill, Romeo R. Aloia
  • Polycarbonate having improved hydrolytic stability
    Patent number: 4374226
    Abstract: Polycarbonates are provided with hydrolytic stability by combining the polycarbonate polymer with a carboxylic acid salt of cadmium. The cadmium salt provides improved hydrolytic stability to both polycarbonates based on diphenols and halogenated diphenols over conventional stabilizers, and does not detrimentally affect other properties such as color stability, haze, initial tensile strength and elongation.
    Type: Grant
    Filed: July 31, 1978
    Date of Patent: February 15, 1983
    Assignee: Mobay Chemical Corporation
    Inventor: Parameswar Sivaramakrishnan
  • Alkanolamine ester of 1,1-biphenyl-2,2-diyl-and alkylidene-1,1-biphenyl-2,2-diyl-cyclic phosphites
    Patent number: 4374219
    Abstract: The title compounds are prepared by reacting alkylated 1,1'-biphenyl-2,2'-diol or alkylated 2,2'-alkylidene-bis-phenol with phosphorus trichloride in an organic solvent and then reacting the intermediate phosphorochlorodite with an alkanolamine. Said phosphites are useful as stabilizers of organic polymers and lubricating oils, especially as processing stabilizers for polyolefins, elastomers, polyesters and polycarbonates.
    Type: Grant
    Filed: July 23, 1981
    Date of Patent: February 15, 1983
    Assignee: Ciba-Geigy Corporation
    Inventors: John D. Spivack, Martin Dexter, Stephen D. Pastor
  • High voltage flame retardant EPOM insulating compositions
    Patent number: 4373048
    Abstract: An ethylene propylene diene terpolymer composition is suitable for use as an insulator in high voltage electrical connector applications, said insulator being characterized by excellent flame retardancy and resistance, low cost, excellent tensile strength, elongation and Shore "A" Hardness with good flow during molding, the insulator comprising a cured and molded product formed from a composition comprising ethylene propylene diene terpolymer, fillers, a synergistic mixture of flame retardant agents comprising at least a brominated organic flame retardant, a hydrated alumina, antimony oxide, and a flow improver.
    Type: Grant
    Filed: July 27, 1981
    Date of Patent: February 8, 1983
    Assignee: AMP Incorporated
    Inventors: Paul C. Schubert, Anil C. Thakrar
  • Hindered amine light stabilizers for polymers
    Patent number: 4370430
    Abstract: Oligomers of the formula ##STR1## which contain at least one piperidyl radical per repeating unit are useful as light stabilizers for polymers.
    Type: Grant
    Filed: August 31, 1981
    Date of Patent: January 25, 1983
    Assignee: American Cyanamid Company
    Inventor: Joseph A. Hoffman
  • Mercapto acid ester antioxidants for polymers
    Patent number: 4370434
    Abstract: Compounds of the formula: ##STR1## wherein R, R' and R.sup.2 are alkyl radicals having 1 to 20 carbon atoms, phenyl radicals which may be substituted by 1 or 2 alkyl groups having 1 to 8 carbon atoms, aralkyl radicals having 7 to 12 carbon atoms, or cycloalkyl radicals having 5 to 12 carbon atoms; and wherein R.sup.3 is hydrogen or an alkyl radical having from 1 to 4 carbon atoms. These compounds have utility as synergistic stabilizers with phenolic type antioxidants for the stabilization of organic materials such as natural and synthetic polymers, rubbers, lubricants and oils, etc.
    Type: Grant
    Filed: April 5, 1982
    Date of Patent: January 25, 1983
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Richard H. Kline
  • Nitrite-sorbate stabilizing system
    Patent number: 4370437
    Abstract: The addition of a nitrite-sorbate stabilizing system to a copolymer of a conjugated diene and a monovinyl-substituted aromatic hydrocarbon improves thermal stability and suppresses gel and fisheye formation.
    Type: Grant
    Filed: February 5, 1982
    Date of Patent: January 25, 1983
    Assignee: Phillips Petroleum Company
    Inventors: Kenneth W. Willcox, James C. Randall
  • Molding method
    Patent number: 4369152
    Abstract: A method of molding a plastic component having first and second portions interconnected by a transition zone with a barrier material encapsulated in the plastic material of both of the portions of the component. The permeable barrier material is placed in a mold cavity to divide the cavity into first and second portions. The first portion of the cavity is filled with plastic material while the second portion of the cavity is filled with plastic material to permeate the barrier material with plastic from both portions whereby the barrier material defines the transition zone and is encapsulated in the plastic component.
    Type: Grant
    Filed: July 24, 1979
    Date of Patent: January 18, 1983
    Assignee: Ex-Cell-O Corporation
    Inventors: John D. Gray, Robert W. Dietrich, Peter A. Weller
  • Hindered amine light stabilizers for polymers
    Patent number: 4369274
    Abstract: Compounds of the formula ##STR1## and polymers thereof are useful as ultraviolet radiation stabilizers for polymers.
    Type: Grant
    Filed: July 20, 1981
    Date of Patent: January 18, 1983
    Assignee: American Cyanamid Company
    Inventor: Walter M. Thomas
  • Carpet backing adhesive
    Patent number: 4368282
    Abstract: Corn syrup is used to extend and stiffen carpet backing adhesive containing a carboxylated styrene butadiene copolymer latex.
    Type: Grant
    Filed: June 17, 1981
    Date of Patent: January 11, 1983
    Assignee: The General Tire & Rubber Company
    Inventor: John Bogdany
  • Novel organic antimony-sulfur compounds and their use as stabilizers for chlorine-containing thermoplasts
    Patent number: 4367304
    Abstract: Compounds of the formula I, II, III or IV ##STR1## wherein X is halogen, OH, --OR.sup.1, --OOCR.sup.2, --OOC--R.sup.4 --COOR.sup.3 or --N(R.sup.5)(R.sup.6), or the two X groups together form a group --O--R.sup.9 --O-- or --OOC--R.sup.9 --COO--, Y has one of the meanings given for X, or it is --NHR.sup.5, --NHNH.sub.2 or --NHNH-phenyl, Z has one of the meanings given for X, or is --SR, and R, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.9 and R' are organic radicals having the meanings defined hereinbelow, are thermal stabilizers for chlorine-containing thermoplastics particularly for PVC. Their effect can be further intensified by the addition of co-stabilizers.
    Type: Grant
    Filed: November 4, 1980
    Date of Patent: January 4, 1983
    Assignee: Ciba-Geigy Corporation
    Inventors: Klaus-Peter Michaelis, Wolfgang Wehner, Holger Andreas, Horst Muller
  • Organic polymeric materials stabilized with acylated hydroxy acid type compounds
    Patent number: 4366280
    Abstract: Organic polymers selected from the group consisting ofpolyolefinsunsaturated elastomerscopolymers of monoolefines and diolefines with other vinyl monomerspolystyrene and copolymers thereofpolymers which are derived from .alpha.,.beta.-unsaturated acids and derivatives thereof and copolymers of these monomers with other unsaturated monomerspolymers derived from unsaturated alcohols and amines or derivatives thereofpolyacetalspolyamides and copolyamidesare stabilized against thermooxidative deterioration by the addition of acylated hydroxy acid type compounds of the formula (I) ##STR1## Wherein the meanings of the substituents and symbols in formula (I) are as defined herein.
    Type: Grant
    Filed: November 3, 1980
    Date of Patent: December 28, 1982
    Assignees: K.K. Musashino Kagaku Kenkyusho, Ciba-Geigy AG
    Inventor: Muneaki Yukawa
  • Polycarbonate resins stabilized with nitriles containing a 2-OH benzophenone group
    Patent number: 4366207
    Abstract: Polycarbonate resins, can be stabilized against the adverse influence of UV light by incorporating either directly into the resin or by means of a coating on the surface of the resin, an effective amount of a certain class of cyano stabilizers.
    Type: Grant
    Filed: May 6, 1982
    Date of Patent: December 28, 1982
    Assignee: General Electric Company
    Inventor: Blair T. Anthony
  • Polycarbonate containing a metal salt of a perhalometalate as an ignition depressant
    Patent number: 4366283
    Abstract: A polycarbonate such as a bisphenol-A homopolycarbonate containing a small amount of a metal salt of a perhalometalate complex, e.g., the potassium salt of perfluorotitanate, resists combustion upon exposure to a low temperature ignition source.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: December 28, 1982
    Assignee: The Dow Chemical Company
    Inventors: Lowell S. Thomas, Ronald V. Petrella
  • Flame retardant polycarbonate resin composition
    Patent number: 4366279
    Abstract: A flame retardant polycarbonate resin composition comprising a polycarbonate resin, a nuclear substituted benzoic acid containing at least one substituent selected from the group consisting of thiosalicylic acid and dihydroxy benzoic acid, and tetrabromobisphenol A or ##STR1## .
    Type: Grant
    Filed: August 19, 1981
    Date of Patent: December 28, 1982
    Assignee: Idemitsu Kosan Company Limited
    Inventors: Tatsuya Tomioka, Norio Ogata
  • Colloidal sol antimony pentaoxide flameproofing compositions
    Patent number: RE31214
    Abstract: This disclosure deals with novel antimony oxide colloidal sols and formulations of the same containing halogens that provide a vastly improved fire-retarding quality to textiles, plastics and other materials to which the compounds are applied.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: April 19, 1983
    Inventors: Henry G. Petrow, Robert J. Allen