Patents Examined by V P
  • Patent number: 4383071
    Abstract: An elastomeric flame and smoke retardant graft copolymer consisting essentially of a backbone copolymer derived from a conjugated diene and butyl acrylate and a side chain polymer derived from vinylidene chloride is prepared by polymerization under emulsion conditions. The graft copolymer may contain from 10 to 70 percent by weight of units derived from the conjugated diene, from 5 to 40 percent by weight of units derived from butyl acrylate and from 15 to 75 percent by weight of units derived from vinylidene chloride. In addition to excellent flame and smoke retardant characteristics, the graft copolymer exhibits excellent low temperature flexibility. The graft copolymers can be utilized in applications such as cushioning, insulation and coating applications where such characteristics are of major importance.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: May 10, 1983
    Assignee: The Firestone Tire & Rubber Company
    Inventors: David F. Lawson, Robert A. Hayes, Alan G. Altenau
  • Patent number: 4381360
    Abstract: 1,3-Dicarbonyl compounds are provided having the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are defined in the description as well as metal and organotin enolate salts thereof.The compounds are effective in enhancing the resistance to deterioration by heat and light of polyvinyl halide resins.
    Type: Grant
    Filed: January 14, 1981
    Date of Patent: April 26, 1983
    Assignee: Phoenix Chemical Corporation
    Inventors: William E. Leistner, Motonobu Minagawa, Kouji Tsuruga, Masashi Harada
  • Patent number: 4381364
    Abstract: Thermoplastic compositions are disclosed which comprise blends of about 50 to about 85 percent by weight of a thermoplastic polyurethane and the balance of the blend comprising (a) a polyvinyl halide resin and (b) a diene-nitrile copolymer rubber, the weight ratio of (a) to (b) being within the range of from about 1:4 to about 1.5:1.The novel blends do not melt or spread flaming drip when combusted but rather form chars. The blends are optionally fire retarded by the addition of flame retardants.The fire retarded blends find utility in, inter alia, electric wire and cable jacketing where a high degree of fire retardance is required. The blends without fire retardants provide a good thermoplastic polyurethane at lower cost than the polyurethanes alone and find utility in those applications normally associated with polyurethanes such as films, footwear, wire jacketing, and particularly those applications calling for a higher degree of oil resistance than polyurethanes alone.
    Type: Grant
    Filed: June 14, 1982
    Date of Patent: April 26, 1983
    Assignee: The Upjohn Company
    Inventors: Costas N. Georgacopoulos, Curtis P. Smith
  • Patent number: 4380554
    Abstract: Compositions of oxidizable organic materials having stabilizing amounts of polymeric monohydroxybenzenoid hydroquinoid antioxidants of from about 500 to about 10,000 molecular weight, and the said polymers which are the reaction products of an alpha, alpha' alkyl aromatic compound containing a benzenoid ring, a hydroquinone compound and a monohydroxy benzenoid compound.
    Type: Grant
    Filed: July 21, 1981
    Date of Patent: April 19, 1983
    Assignee: Standard Oil Company (Indiana)
    Inventor: Carl Serres, Jr.
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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