Patents Examined by R. A. White
  • Patent number: 4439565
    Abstract: Oligomeric esteramides having recurring structural units of the formula ##STR1## where G is a hindered amine radical of formula I or II ##STR2## in which R.sup.1 is hydrogen or alkyl having 1 to 4 carbon atoms, R.sup.2 is hydrogen, alkyl having 1 to 12 carbon atoms, allyl, benzyl, acetyl, acryloyl or cyano, Z.sub.1 is a direct bond, --NHCH.sub.2 CH.sub.2 --, --NHCH.sub.2 CH.sub.2 CH.sub.2 -- or --OCH.sub.2 CH.sub.2 --, Z.sub.2 is ethylene or trimethylene, E is a divalent aliphatic, aromatic or alicyclic radical and L is unsubstituted or substituted alkylene, are useful light stabilizers for plastics.
    Type: Grant
    Filed: November 10, 1982
    Date of Patent: March 27, 1984
    Assignee: Ciba-Geigy Corporation
    Inventors: Roland A. E. Winter, Roger F. Malherbe, Frank Tieh-Yin Fu
  • Patent number: 4439564
    Abstract: 2-[Alkyl substituted-phenoxy]-2,3-dihydro-1,2-benzoxaphosphole 2-oxide, cyclic phosphonates prepared, for example from hindered phenols and ortho-methylolphenols, are effective heat stabilizers and antioxidants for organic materials subject to degradation by heat, oxygen and the like, and result in effective stabilizer systems when combined with hydroxyphenylalkylenyl isocyanurates.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: March 27, 1984
    Assignee: The B. F. Goodrich Co.
    Inventor: Dwight W. Chasar
  • Patent number: 4439566
    Abstract: A polycarbonate such as bisphenol-A homopolycarbonate containing a small amount of a crown salt, e.g., an 18-crown ether (potassium fluoroborate), resists combustion upon exposure to a low temperature ignition source.
    Type: Grant
    Filed: April 16, 1982
    Date of Patent: March 27, 1984
    Assignee: The Dow Chemical Company
    Inventor: Lowell S. Thomas
  • Patent number: 4436854
    Abstract: Self-extinguishing molding materials, comprising (A) a polymer of a vinyl-aromatic compound, especially a styrene polymer, which has been made impact-resistant (B) a polyphenylene ether and (C) a flameproofing additive, with or without (D) conventional additives, wherein one part of the soft component of the impact-resistant polymer of the vinyl-aromatic compound has a mean particle size of .ltoreq.1.5 .mu.m and the other part has a mean particle size of .ltoreq.3 .mu.m. Such molding materials not only have good self-extinguishing properties but also give moldings having a particularly uniform matt surface.
    Type: Grant
    Filed: January 29, 1982
    Date of Patent: March 13, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Brandstetter, Volker Muench, Herbert Naarmann, Edmund Priebe
  • Patent number: 4430470
    Abstract: Flame retardant additive comprising alumina trihydrate and a methyl hydrogen polysiloxane which when added to ethylene polymers provide compositions which have improved flame retardant properties, have reduced gas evolution, do not drip or give off noxious gases on burning and are particularly useful as jacketing material about wire and cables.
    Type: Grant
    Filed: June 30, 1982
    Date of Patent: February 7, 1984
    Assignee: Nippon Unicar Company Ltd.
    Inventors: Seiho Taniguchi, Yuichiro Sakuma, Tadashi Yoshii
  • Patent number: 4430467
    Abstract: A flame retardant polymer composition comprising 2,3-dimethyl-2,3-diphenylbutane, a halogenated bisimide corresponding to the formula: ##STR1## wherein Q is methylene or oxygen, X is chlorine or bromine, R is hydrogen or an alkyl group containing 1-5 carbon atoms, R' is hydrogen or methyl and R" is an organic group containing 1-15 carbon atoms, and a polypropylene polymer selected from the group consisting of polypropylene and copolymers containing at least 50% by weight of co-polymerized propylene monomer.
    Type: Grant
    Filed: January 7, 1982
    Date of Patent: February 7, 1984
    Assignee: Saytech, Inc.
    Inventors: Joseph M. Lesniewski, Michael J. Breza
  • Patent number: 4427817
    Abstract: The use of open-chain acetals or ketals corresponding to the following general formula ##STR1## as non-discoloring anti-ozonants for natural and/or synthetic rubber.
    Type: Grant
    Filed: April 6, 1982
    Date of Patent: January 24, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dieter W. Bruck, Werner Jeblick, Heinrich Konigshofen, Ernst Roos, Lother Ruetz
  • Patent number: 4426472
    Abstract: Use of 2,2,6,6-tetraalkylpiperidine compounds or their acid addition salts or complexes with metal compounds, optionally together with further stabilizers, for stabilizing metallic stoving lacquers based on hot-crosslinkable alkyd or acrylic resins against the action of light, moisture and oxygen.
    Type: Grant
    Filed: May 6, 1982
    Date of Patent: January 17, 1984
    Assignee: Ciba-Geigy Corporation
    Inventor: Godwin Berner
  • Patent number: 4415695
    Abstract: A method for preparing essentially color-free, stabilized polymers of conjugated dienes or vinyl aromatic hydrocarbons or copolymers of conjugated dienes and vinyl aromatic hydrocarbons involves a first stage in which a living polymer of a conjugated diene or vinyl aromatic hydrocarbon or copolymer of a conjugated diene and a vinyl aromatic hydrocarbon is prepared by anionically polymerizing the conjugated diene or vinyl aromatic hydrocarbon, or copolymerizing the conjugated diene and the vinyl aromatic hydrocarbon using a lithium-based catalyst and an inert hydrocarbon diluent. Then, the living polymer or copolymer is terminated by the addition of a suitable terminating agent. Following the termination procedure, boric acid is added to the polymer of copolymer in a sufficient amount to prevent or substantially reduce color formation. Then, stabilizing agents are added to the polymer or copolymer and the polymer or copolymer is recovered from the diluent.
    Type: Grant
    Filed: March 25, 1982
    Date of Patent: November 15, 1983
    Assignee: The Firestone Tire & Rubber Company
    Inventor: Sunil B. Sarkar
  • Patent number: 4415692
    Abstract: This invention relates to the thermal stabilization of mixtures of aromatic polycarbonates and ABS polymers using 0.01 to 3% by weight, based on the total mixture, of esters of boric acid, in particular with ortho and/or para-alkyl substituted phenols or the corresponding bis-phenols.
    Type: Grant
    Filed: May 29, 1981
    Date of Patent: November 15, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karsten Idel, Hans-Josef Buysch, Horst Peters, Josef Buekers
  • Patent number: 4415686
    Abstract: 2,6-Di-t-butyl-4-substituted phenyl bis(3,6-di-t-butyl-2-naphthyl)phosphites, readily prepared by reacting together a phosphorodichloridite of a 4-substituted-2,6-di-t-butylphenol and a sodium salt of 3,6-di-t-butyl-2-naphthol, to form antioxidant and ultraviolet stabilizers that form particularly effective combinations with hydroxyphenylalkyleneyl isocyanurates to provide enhanced oven aging properties to organic materials subject to attack by heat and oxygen.
    Type: Grant
    Filed: November 24, 1982
    Date of Patent: November 15, 1983
    Assignee: The B. F. Goodrich Company
    Inventor: Dwight W. Chasar
  • Patent number: 4413075
    Abstract: There are disclosed new polymers of piperidine having the general formula: ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4, each independently of the others, are an alkyl radical having 1 to 4 C, or R.sub.1 and R.sub.2, and/or R.sub.3 and R.sub.4 form a cycloalkylene radical having 3 to 12 C, R.sub.5 is hydrogen, an alkyl, hydroxyalkyl or alkyl-oxy radical having 1 to 6 C, or an aryl or an aryl-alkyl radical having 6 to 18 C, an alkenyl radical having 2 to 6 C or a --(CH.sub.2).sub.X --CO.sub.2 --R.sub.7 radical in which X is a number from 0 to 12, and R.sub.7 =H, a metal, an alkyl, alkylene, alkenyl, alkenylene radical containing 1 to 20 C; R.sub.6 =H or an alkyl having 1 to 4 C and n is an integer from 2 to 100.Use of the piperidine polymers having general formula (I) as stabilizers of polymeric substances, and polymeric compositions stabilized with said piperidine derivatives are also disclosed.
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: November 1, 1983
    Assignee: Montedison S.p.A.
    Inventor: Piero Di Battista
  • Patent number: 4413078
    Abstract: An olefin polymer composition having improved stability to deterioration resulting from exposure to ultraviolet radiation. The enhanced stability results from the effective presence of a combination of an organic phosphite ester and a hydroxybenzophenone.
    Type: Grant
    Filed: May 7, 1982
    Date of Patent: November 1, 1983
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Elyse B. Lewis, Leo L. Valdiserri
  • Patent number: 4410650
    Abstract: An olefin polymer composition containing an ultraviolet light stabilizer. The ultraviolet light stabilizer is a zerovalent nickel complex the organic portion of which is an ester of pentaerythritol phosphite.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: October 18, 1983
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Elyse M. Lewis, Leo L. Valdiserri
  • Patent number: 4409347
    Abstract: Self-extinguishing flame resistant polyamide moulding compositions containing from 0.1 to 20% by weight of at least one glycoluril and/or reaction product of glycoluril as a flame-proofing agent.
    Type: Grant
    Filed: March 8, 1982
    Date of Patent: October 11, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ludwig Rottmaier, Rudolf Merten, Milan J. Tima, Dietrich Michael
  • Patent number: 4409348
    Abstract: Poly-bis-triazinylaminotriazinylamines are prepared from cyanuric chloride, triazinylamines and two different diamino compounds. They are light stabilizers, of low volatility and resistant to migration, for synthetic polymers.
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: October 11, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hartmut Wiezer, Gerhard Pfahler
  • Patent number: 4409349
    Abstract: Polycarbonates are heat stabilized by the incorporation of a dioxolane compound having a boiling point greater than about 250.degree. C. The amount of dioxolane compound used is from 100 to 10,000 parts per million.
    Type: Grant
    Filed: April 22, 1982
    Date of Patent: October 11, 1983
    Assignee: The Dow Chemical Company
    Inventor: George E. Ham
  • Patent number: 4407996
    Abstract: A composition comprising an aromatic carbonate polymer in admixture with an effective thermal stabilizing amount of a sulfone compound or a sulfonyl containing polymer.
    Type: Grant
    Filed: August 26, 1981
    Date of Patent: October 4, 1983
    Assignee: General Electric Company
    Inventors: Stephen M. Cooper, Sheldon J. Shafer, John A. Tyrell
  • Patent number: 4408005
    Abstract: Flame retardant polycarbonate compositions are prepared from dihydric aromatic compounds and alkali metal hydrogen sulfite. These compositions are more effective than similar compositions containing alkali metal sulfites.
    Type: Grant
    Filed: March 22, 1982
    Date of Patent: October 4, 1983
    Assignee: The Dow Chemical Company
    Inventor: Joseph B. Byrne
  • Patent number: 4407995
    Abstract: Polycarbonates are heat stabilized by the incorporation of a carbonate compound having a boiling point greater than about 250.degree. C. and an organophosphorous compound such as a phosphonite or a phosphite. The amount of the additive compound used in each instance is from 100 to 10,000 parts per million.
    Type: Grant
    Filed: July 28, 1982
    Date of Patent: October 4, 1983
    Assignee: The Dow Chemical Company
    Inventor: Kevin F. Dick