Patents Examined by R. A. White
  • Stabilized oxymethylene copolymer composition
    Patent number: 4342680
    Abstract: A stabilized oxymethylene copolymer composition comprising an oxymethylene copolymer, and incorporated therein,(1) at least one amine-substituted triazine of the following formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are a hydrogen atom, a halogen atom, a hydroxyl group, an alkyl group, an alkoxy group, an aryl group, a hydrogenated aryl group, an amino group or a substituted amino group, and at least one of them is an amino group or a substituted amino group,(2) at least one sterically hindered phenol of the following formula ##STR2## wherein R.sub.4 and R.sub.5 are an alkyl group, a substituted alkyl group or a substituted triazole group and R.sub.
    Type: Grant
    Filed: March 20, 1980
    Date of Patent: August 3, 1982
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Akitoshi Sugio, Akira Amemiya, Masaharu Kimura, Yoshiharu Otuki, Kiyokazu Kawaguchi
  • Novel stabilizers
    Patent number: 4340533
    Abstract: 2,2,6,6-Tetramethylpiperidine derivatives of the formula: ##STR1## wherein m is 0, 1 or 2, R.sub.1 is hydrogen, methyl, ethyl, phenoxymethyl or phenyl and R.sub.2 is C1-C8 alkyl, are excellent stabilizers for synthetic polymers.
    Type: Grant
    Filed: September 29, 1980
    Date of Patent: July 20, 1982
    Assignee: Ciba-Geigy Corporation
    Inventor: Jean Rody
  • Benzofuran(2)one or indolin(2)one compounds useful as stabilizers for organic materials
    Patent number: 4338244
    Abstract: The present invention relates to a process for stabilizing organic polymeric materials comprising incorporating therein a benzofuran(2)one compound or indolin(2)one compound containing at least two benzofuran(2)one or indolin(2)one nuclei.
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: July 6, 1982
    Assignee: Sandoz Ltd.
    Inventors: Hans Hinsken, Horst Mayerhoefer, Wolfgang Mueller, Hermann Schneider
  • 2,2,6,6-Tetramethyl-4-piperidyl carboxylic acid esters and amides of mono and poly alcohols, phenols and amines as stabilizers for synthetic polymers
    Patent number: 4336183
    Abstract: 2,2,6,6-Tetramethyl-4-piperidyl carboxylic acid esters and amides of mono and poly alcohols, phenols and amines are provided, useful as stabilizers for organic polymeric materials, and having the general formula: ##STR1##
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: June 22, 1982
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Yutaka Nakahara, Toshihiro Shibata, Naohiro Kubota
  • Self-extinguishing polymeric compositions
    Patent number: 4336182
    Abstract: Thermoplastic polymers, such as polypropylene, are rendered anti-flaming and self-extinguishing by addition of ammonium or amine phosphate and a nitrogen-containing water-insoluble oligomer or polymer containing in the monomeric unit a --CO--group attached to a ##STR1## group, wherein n is 2 or 3, being part of a ring, e.g., poly(carbonylpiperazine).
    Type: Grant
    Filed: July 25, 1980
    Date of Patent: June 22, 1982
    Assignee: Montedison S.p.A.
    Inventors: Gianluigi Landoni, Spartaco Fontani, Osvaldo Cicchetti
  • Polycarbonate containing a metal perfluoroborate and an organosilane as ignition depressants
    Patent number: 4335038
    Abstract: A polycarbonate such as a bisphenol-A homopolycarbonate containing amounts of a metal salt of perfluoroborate, e.g., the potassium salt of perfluoroborate and an organosilane, e.g., glycidoxypropyl trimethoxysilane, resists combustion upon exposure to a low temperature ignition source.
    Type: Grant
    Filed: September 26, 1980
    Date of Patent: June 15, 1982
    Assignee: The Dow Chemical Company
    Inventor: Lowell S. Thomas
  • Thermally stable polycarbonate compositions
    Patent number: 4335039
    Abstract: Thermally stable polycarbonate compositions are obtained by admixing with a high molecular weight aromatic polycarbonate resin a stabilizing amount of a dioxane phosphite.
    Type: Grant
    Filed: November 2, 1978
    Date of Patent: June 15, 1982
    Assignee: General Electric Company
    Inventor: Ronald L. Markezich
  • Self-extinguishing polymeric compositions
    Patent number: 4333869
    Abstract: This invention relates to self-extinguishing polymeric compositions, comprising a thermoplastic polymer, preferably a polyolefin, and an anti-flame additive consisting of:(1) 10-25% by weight, on the total composition, of an ammonium or amine phosphate; and(2) 10-25% by weight, on the total composition, of a product obtained by reacting in bulk, at a temperature comprised between 80.degree. C. and 230.degree. C.,(a) at least one organic compound selected from the group consisting of(i) linear or cyclic nitrogen containing compounds having at least one >C.dbd.O or >C.dbd.S group and at least one --NH--group being part of the linear chain or of the ring, and(ii) amino-triazine compounds; with(b) an epoxyalkyl ester of isocyanuric acid of the formula: ##STR1## wherein n is an integer from 1 to 3; the reaction being carried out according to a molar ratio (a):(b) comprised between 3:1 and 0.1:1.
    Type: Grant
    Filed: September 15, 1980
    Date of Patent: June 8, 1982
    Assignee: Montedison S.p.A.
    Inventors: Franco Marciandi, Pasquale Relvini
  • Light-stable polypropylene compositions
    Patent number: 4331585
    Abstract: Light-stable polypropylene fibers containing a combination of a hindered piperidinyl compound and a pentaerythritol polyphosphite.
    Type: Grant
    Filed: May 23, 1980
    Date of Patent: May 25, 1982
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Leo L. Valdiserri, Elyse M. Bullock
  • Novel light stabilizers for polymers
    Patent number: 4331586
    Abstract: Oligomers of the formula ##STR1## which contain at least one piperidinyl moiety in the repeating unit are useful as light stabilizers for polymers.
    Type: Grant
    Filed: July 20, 1981
    Date of Patent: May 25, 1982
    Assignee: American Cyanamid Company
    Inventor: William B. Hardy
  • Flame resistant, transparent polycarbonates comprising bisulfite adducts
    Patent number: 4327015
    Abstract: The invention is directed to flame-resistant, transparent aromatic polycarbonate compositions comprising polycarbonate resin and an additive amount of a member selected from the group consisting of aldehyde-bisulphite adducts and ketone-bisulphite adducts.
    Type: Grant
    Filed: May 11, 1981
    Date of Patent: April 27, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Frank Druschke, Dieter Margotte, Wolfgang Cohnen, Karsten Idel
  • Benzofuranone or indolinone compounds useful as stabilizers for organic materials
    Patent number: 4325863
    Abstract: The present invention relates to a process for stabilizing organic polymeric materials comprising incorporating therein a benzofuran (2) one or indolin (2) one compound as stabilizer. Such stabilized polymeric materials are stabilized against degradation during the polymer processing.
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: April 20, 1982
    Assignee: Sandoz Ltd.
    Inventors: Hans Hinsken, Horst Mayerhoefer, Wolfgang Mueller, Hermann Schneider
  • Polyalkylpiperidine derivatives of s-triazines as stabilizers
    Patent number: 4322337
    Abstract: Novel polyalkylpiperidine derivatives of s-triazines of the formula ##STR1## in which X and X' are a divalent organic radical, X", X.sub.1 and X.sub.2 are a direct bond or a divalent organic radical, Y, Y', Y", Y.sub.1, Y.sub.2, Z and Z' are --O--, --S--, --NH-- or --NR.sup.3 --, R is H or CH.sub.3 and R.sup.1, R.sup.2 and R.sup.3 are a monovalent organic radical or a polyalkylpiperidine group, or the group R.sup.1 --X"--Y"-- is chlorine, and R.sup.4 is H, O, alkyl, allyl or benzyl, are valuable stabilizers for polymeric materials, in particular to protect them against photochemical degradation. The derivatives are prepared by stepwise reaction of cyanuric chloride with the corresponding YH, Y'H and Y"H compounds.If 2 or 3 of these components are identical, the corresponding symmetrically substituted triazine compounds, which are preferred, are formed.
    Type: Grant
    Filed: December 17, 1980
    Date of Patent: March 30, 1982
    Assignee: Ciba-Geigy Corporation
    Inventor: Jean Rody
  • Polyester/polyether segmented copolymers stabilized against degradation by UV light via copolymerization with analogs of 2,2,6,6-tetramethylpiperidine derivatives
    Patent number: 4322522
    Abstract: Polyester/polyether segmented copolymers are stabilized against degradation by UV light via copolymerization with novel diesters and/or bis-hydroxyalkyl terminated derivatives of 2,2,6,6-tetramethylpiperidines.
    Type: Grant
    Filed: July 8, 1980
    Date of Patent: March 30, 1982
    Assignee: Akzona Incorporated
    Inventors: David A. Johnson, Robert L. Gilly, Kenneth B. Wagener
  • Process for producing synthetic flame resisting polyamides, flame resisting filaments and fibres and products obtained by using the same
    Patent number: 4321188
    Abstract: A method for producing flame resistant synthetic polyamides, suitable for inning is described, wherein melamine and isocyanuric acid are reacted in an aqueous environment at the melamine isocyanurate formation temperature. An aqueous suspension of melamine isocyanurate is obtained having a maximum granule size not exceeding 2 microns, substantially free from agglomerates. The suspension is admixed with the monomeric material and the whole is submitted to polymerization. The invention provides a successful method for obtaining flame-resisting polyamide fibers and yarns owing to the presence therein of the melamine isocyanurate additive.
    Type: Grant
    Filed: January 3, 1980
    Date of Patent: March 23, 1982
    Assignee: Snia Viscosa Societa Nazionale Industria Applicazioni Viscosa s.p.a.
    Inventors: Ciaperoni Aldemaro, Cappelli Alberto
  • Phosphite stabilizer
    Patent number: 4321218
    Abstract: Tris-(2,4-di-t-octylphenyl)-phosphite is suitable as a stabilizer for organic material.
    Type: Grant
    Filed: April 30, 1980
    Date of Patent: March 23, 1982
    Assignee: Ciba-Geigy Corporation
    Inventors: Michael Rasberger, Helmut Muller
  • Flame retarding agents for polycarbonates
    Patent number: 4320049
    Abstract: A sufficient amount of a novel halogenated aromatic imide sulfonate, represented by the structural formula: ##STR1## wherein X is a halogen, n is 1 to 4, Y is a lower alkyl having 1 to 4 carbon atoms, a halogen or a hydrogen atom, "a" is 0 to 4, M is an alkali metal and T is either 0 or 1, is incorporated into an aromatic polycarbonate to provide flame resistance thereto.
    Type: Grant
    Filed: July 14, 1980
    Date of Patent: March 16, 1982
    Assignee: Mobay Chemical Corporation
    Inventors: Sivaram Krishnan, Russell P. Carter, Jr., Robert D. Kroshefsky
  • Stabilizers for polymers and polymers stabilized thereby
    Patent number: 4317767
    Abstract: New N-alkyl-piperidine derivatives of hydroxy-benzyl-malonic acid are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in partcular polyole fins, against sunlight, heat and oxidation.A process for producing the new compounds is also disclosed, as well as the use thereof as stabilizers of polymers and polymeric compositions.
    Type: Grant
    Filed: January 30, 1980
    Date of Patent: March 2, 1982
    Assignee: Montedison S.p.A.
    Inventors: Piero Di Battista, Francesco Gratani
  • Flame retardants
    Patent number: 4317769
    Abstract: Alkali metal salts or/and alkaline earth metal salts of cyclic phosphorus compounds expressed by the general formula ##STR1## (wherein X.sub.1 to X.sub.8 each represent hydrogen, halogen, cyano group, acyl group, alkyl group, halogen-substituted alkyl group, aryl group, halogen-substituted aryl group or aralkyl group) are provided. These metal salts impart a specific flame retardancy to organic high molecular weight compounds prepared from alkylidenebisphenols as a raw material, without lowering the characteristic properties of substrates.
    Type: Grant
    Filed: March 19, 1980
    Date of Patent: March 2, 1982
    Assignee: Sanko Kaihatsu Kagaku Kenkyusho
    Inventors: Toranosuke Saito, Hiroyuki Ohishi
  • Dihydropyridine derivatives as stabilizers for vinyl chloride polymers
    Patent number: 4317768
    Abstract: The instant invention relates to compounds of the general formula: ##STR1## wherein R.sub.1 represents an alkyl, alkenyl, phenyl or phenylalkyl radical, R.sub.2 represents an alkyl, alkenyl or alkynyl radical, a .omega.-halogenoethyl radical, an optionally substituted benzyl radical, a phenylalkenyl radical, an optionally substituted phenyl radical, a radical of the formula R.sub.4 --O--(CH.sub.2).sub.n -- wherein n is 2, 3, or 4 and R.sub.4 represents an optionally substituted alkyl radical or a phenyl radical, R.sub.3 represents a hydrogen atom, an alkyl, alkenyl or phenyl radical.The compounds of formula I have been found to be useful as stabilizers for vinyl resins.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: March 2, 1982
    Assignee: Labaz
    Inventors: Charles Pigerol, Marie-Madeleine Chandavoine, Paul de Cointet de Fillain