Patents Examined by R. A. White
  • Polyalkylated 4-aminopiperidine derivatives as stabilizers for synthetic polymers
    Patent number: 4316837
    Abstract: Polyalkylated 4-aminopiperidine derivatives having the formula: ##STR1## wherein R is a C.sub.1 -C.sub.19 alkyl group, a cycloalkyl group of from 5 to 7 carbon atoms, an unsubstituted aryl group, an aryl group substituted with one or more C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy groups, an aralkyl group having 7 or 8 carbon atoms, or ##STR2## where x is an integer from 0 to 4 inclusive and R' is C.sub.1 -C.sub.4 alkyl, which are useful as stabilizers for synthetic polymers are disclosed. Also disclosed are compositions stable to photo-deterioration comprising said polyalkylated 4-aminopiperidine derivatives and a synthetic polymer.
    Type: Grant
    Filed: September 10, 1980
    Date of Patent: February 23, 1982
    Assignee: Carstab Corporation
    Inventors: Kenneth R. Molt, Mary J. Zestermann
  • Flame-resistant plastics moulding material
    Patent number: 4315849
    Abstract: Flame-resistant plastics moulding material formed from a polymer, preferably a thermoplast, and a halogenated benzimidazolone or halogenated benzimidazolone derivative, such as N,N'-di-(2-hydroxyethyl)-4,5,6,7-tetrabromobenzimidazolone or 4,5,6,7-tetrabromobenzimidazolone calcium, as a flame-resistant agent. The flame-resistant agent is added to the polymer at any suitable stage of production by a simple mixing together of the constituents, whereby this flame-resistant agent must not react chemically with the polymer.
    Type: Grant
    Filed: August 22, 1980
    Date of Patent: February 16, 1982
    Assignee: Ciba-Geigy Corporation
    Inventors: Lothar Buxbaum, Jurgen Habermeier, Franz Breitenfellenr, Thomas Kainmuller
  • 2-[2-Hydroxy-3,5-di-(.alpha. ,.alpha.-dimethylbenzyl)-phenyl]-2H-benzotriazole and stabilized compositions
    Patent number: 4315848
    Abstract: 2-[2-Hydroxy-3,5-di-(.alpha.,.alpha.-dimethylbenzyl)phenyl]-2H-benzotriazol e exhibits outstanding efficacy in protecting organic substrates from light induced deterioration as well as good resistance to loss by volatilization or exudation during the high temperature processing of stabilized compositions. The combination of the benzotriazole UV absorber with a hindered amine light stabilizer is particularly efficacious in protecting thermoset and thermoplastic acrylic resin automotive finishes and enamels.
    Type: Grant
    Filed: October 1, 1980
    Date of Patent: February 16, 1982
    Assignee: Ciba-Geigy Corporation
    Inventors: Martin Dexter, Roland A. E. Winter
  • Flameproofed filled nylon molding materials
    Patent number: 4314927
    Abstract: A flameproofed thermoplastic molding material which possesses good long-term stability and contains 100 parts of a nylon, 10-100 parts of an inorganic filler, 1-12 parts of red phosphorus and 1-40 parts of melamine cyanurate.The molding materials may be used to produce moldings, especially for electrical articles.
    Type: Grant
    Filed: May 27, 1980
    Date of Patent: February 9, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Rainer Theysohn, Horst Reimann
  • 2,2,6,6-Tetraalkyl-4-piperidyl alcohol esters of tetradecylene polycarboxylic acids as light stabilizers for synthetic polymers
    Patent number: 4312804
    Abstract: 2,2,6,6-Tetraalkyl-4-piperidyl alcohol esters of tetradecylene polycarboxylic acids are provided, useful as light stabilizers for organic polymeric materials, and having the general formula: ##STR1## in which R is selected from the group consisting of ##STR2## wherein: R.sub.5 and R.sub.6 are each hydrogen or lower alkyl or hydroxyalkyl having from one to about six carbon atoms;R.sub.7 is lower alkyl having from one to about six carbon atoms;R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are selected from the group consisting of hydrogen and methyl;X.sub.1 and X.sub.3 are selected from the group consisting of hydrogen and COOR;X.sub.2 and X.sub.4 are selected from the group consisting of COOR and ##STR3## 30 wherein R.sub.8, R.sub.9 and R.sub.10 are selected from the group consisting of hydrogen, hydroxy, alkyl, and alkoxy having from one to about eighteen carbon atoms.
    Type: Grant
    Filed: July 23, 1980
    Date of Patent: January 26, 1982
    Assignee: Argus Chemical Corporation
    Inventors: Motonobu Minagawa, Naohiro Kubota, Toshihiro Shibata
  • Thermally stable polycarbonate compositions
    Patent number: 4312803
    Abstract: Thermally stable polycarbonate compositions are obtained by admixing with a high molecular weight aromatic polycarbonate resin a stabilizing amount of a bisphosphite.
    Type: Grant
    Filed: March 16, 1979
    Date of Patent: January 26, 1982
    Assignee: General Electric Company
    Inventors: Ronald L. Markezich, Gary L. Freimiller, Walter K. Olander, Robert J. Axelrod
  • Flame-retardant thermoplastic materials and molded parts therefrom
    Patent number: 4311636
    Abstract: Flame-retardant thermoplastic materials are prepared from polymers and copolymers of styrene, organic halogen compounds and compounds synergistic with the halogen compounds. These synergistic compounds contain heterocyclic amide or imide groups linked by a labile --C--C-- linkage.
    Type: Grant
    Filed: December 10, 1979
    Date of Patent: January 19, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Hahn, Walter Himmele, Herbert Naarmann, Klaus Penzien
  • Production of polyester thermally stabilized with an oxirane
    Patent number: 4310658
    Abstract: High molecular weight linear condensation polyesters are stabilized against deterioration by heat with a stabilizer comprising 2-(phenoxy methyl)-3-phenyl oxirane.
    Type: Grant
    Filed: June 18, 1980
    Date of Patent: January 12, 1982
    Assignee: Allied Corporation
    Inventors: Stanley D. Lazarus, Robert S. Cooke, Paul E. Galick
  • Polyphenylene oxide resin composition stabilizer
    Patent number: 4309335
    Abstract: Ortho-substituted phenyl acid phosphite stabilizers for polyphenylene oxide resin compositions have the formula ##STR1## in which R.sub.1 is a t-butyl, t-amyl, cyclohexyl or phenyl group; R.sub.2 is a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a cyclohexyl group, or a phenyl group; R.sub.3 is a hydrogen atom or a methyl group; and R.sub.4 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an ether-alkyl group having 3 to about 70 carbon atoms and 1 to 30 ether groups, an aryl group having 6 to 18 carbon atoms, a cycloalkyl group having 5 to 14 carbon atoms, an aralkyl, alkaryl, or alkoxyaryl group having 7 to 19 carbon atoms, an ethoxylated aryl or alkaryl group having 8 to 78 carbon atoms and 1 to 30 ether groups, or a cycloalkylaryl group having 11 to 19 carbon atoms.
    Type: Grant
    Filed: September 17, 1979
    Date of Patent: January 5, 1982
    Inventors: Mitsuo Akutsu, Yutaka Nakahara, Kazumi Kitsukawa
  • Polymeric compositions containing antioxidants
    Patent number: 4309336
    Abstract: Composition of matter comprising a polymeric material containing xylene-bis(decahydroquinoxalin-2-one) antioxidant, a mixture thereof, or a synergistic mixture thereof with a hindered phenol antioxidant.
    Type: Grant
    Filed: May 15, 1980
    Date of Patent: January 5, 1982
    Assignee: The B. F. Goodrich Company
    Inventors: John T. Lai, Valerie B. Whitehead
  • Stabilized polycarbonate compositions
    Patent number: 4308196
    Abstract: Polycarbonate resins which contain sufficient halogenated phenolic residues to impart fire retardant characteristics to articles molded therefrom are stabilized by the addition of a hindered phenol selected from the group consisting of a high molecular weight hindered phenol phosphate, a high molecular weight hindered phenol cyanurate, an ester of a hindered phenolic carboxylic acid and an alcohol having 10-26 carbon atoms, and the reaction of a hindered phenol and an aldehyde. The polycarbonates with the stabilizers of the invention exhibit improved melt flow stabilities and hydrolytic aging characteristics over conventionally stabilized polycarbonates and in most cases over unstabilized polycarbonates.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: December 29, 1981
    Assignee: Mobay Chemical Corporation
    Inventor: Frank J. Limbert
  • Heterocyclic benzoate ultraviolet stabilizers and their use in organic compositions
    Patent number: 4308194
    Abstract: The invention relates to heterocyclic benzoate compounds which have been found to be effective ultraviolet stabilizers. The invention also relates to ultraviolet degradable organic compositions containing an amount of a heterocyclic benzoate composition to prevent such degradation. These stabilizers are effective in the presence of other additives commonly employed in polymeric compositions including, for example, pigments, colorants, fillers, reinforcing agents and the like. These ultraviolet stabilizers may be incorporated into the organic compositions such as polymers by adding to the polymer melt or dissolved in the polymer dope, coated on the exterior of the shaped or molded article, film or extruded fiber.
    Type: Grant
    Filed: February 17, 1978
    Date of Patent: December 29, 1981
    Assignee: Eastman Kodak Company
    Inventors: Gether Irick, Jr., Charles A. Kelly
  • Polyolefins stabilized with cyclic diphosphites
    Patent number: 4305866
    Abstract: A process for the preparation of mixed aromatic-aliphatic phosphites. The process involves the reaction of an alkylphenol with diphenyl-(or a lower dialkyl-) pentaerythritol diphosphite. The process is simple and inexpensive, and produces a relatively pure product.
    Type: Grant
    Filed: August 30, 1979
    Date of Patent: December 15, 1981
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: James F. York, Leo L. Valdiserri
  • Method for extending the useful life of dienic polymers which are sensitive to oxidative degradation and stabilized compositions resistant to oxidative degradation
    Patent number: 4304712
    Abstract: Method for extending the useful life of dienic polymers which are sensitive to oxidative degradation. According to this method such polymers are combined with a stabilizer effective amount of at least one tetrahydro-1,5-benzodiazapene compound of the formula: ##STR1## wherein R.sub.1 through R.sub.4 are independently selected from the group consisting of hydrogen, alkyl of 1 to 12 carbon atoms, cycloalkyl, aryl, aralkyl, provided further that R.sub.3 and R.sub.4 can collectively form a cyclic, alicyclic, aromatic or heterocyclic ring pendant from the two position of the above compound and R.sub.1 and R.sub.2 can collectively form an alicyclic ring.The polymeric compositions formed from dienic polymers and the above stabilizer are highly suitable to use in the preparation of components for the automotive and electronics markets.
    Type: Grant
    Filed: April 3, 1978
    Date of Patent: December 8, 1981
    Assignee: The B. F. Goodrich Company
    Inventor: John T. Lai
  • Flame retardant polycarbonate compositions
    Patent number: 4303575
    Abstract: A flame retardant polycarbonate composition is comprised of a polycarbonate resin, perfluoroalkane sulfonate salt and a halogenated aromatic anhydride.
    Type: Grant
    Filed: February 7, 1980
    Date of Patent: December 1, 1981
    Assignee: Mobay Chemical Corporation
    Inventor: Gerard E. Reinert
  • Process for stabilizing vinylidene chloride resins
    Patent number: 4303564
    Abstract: A process for imparting heat and light stability to vinylidene chloride copolymer resins by adding thereto small amounts of Vitamin E, an alkyl ester of thiodipropionic acid having 12 to 18 carbon atoms in an alkyl group thereof and an alkali metal salt or an alkali earth metal salt of a phosphoric acid.
    Type: Grant
    Filed: February 28, 1980
    Date of Patent: December 1, 1981
    Assignee: Asahi-Dow Limited
    Inventors: Nobuaki Kuroshima, Koichi Mashiki
  • Color stable aromatic polyesters
    Patent number: 4302382
    Abstract: Color stable compositions consisting of aromatic polyester and 0.01 to 0.5% by weight of the aromatic polyester of a stabilizer selected from the group consisting of phosphates, phosphonates and mixtures of either phosphates or phosphonates with epoxides having a boiling point of above about 250.degree. C. These compositions are useful in the manufacture of engineering plastics such as automobile headlights.
    Type: Grant
    Filed: May 5, 1980
    Date of Patent: November 24, 1981
    Assignee: Standard Oil Company (Indiana)
    Inventor: James Spanswick
  • Stabilized olefin polymers
    Patent number: 4302383
    Abstract: An olefin polymer composition containing a cyclic, hindered amine in combination with an organic phosphite ester. The composition is relatively stable in the presence of ultraviolet light.
    Type: Grant
    Filed: May 19, 1980
    Date of Patent: November 24, 1981
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Leo L. Valdiserri, Elyse M. Bullock
  • Method for inhibiting the thermal or ultraviolet degradation of thermoplastic resin and thermoplastic resin composition having stability to thermal or ultraviolet degradation
    Patent number: 4299759
    Abstract: A method for inhibiting the thermal or ultraviolet degradation of a thermoplastic resin containing halogen and/or acidic components excepting olefinic resins, which comprises mixing said thermoplastic resin with about 0.01 to about 5 parts by weight, per 100 parts by weight of said resin, of a hydrotalcite of the following formulaMg.sub.1-x Al.sub.x (OH).sub.2 A.sub.x/n.sup.n- .multidot.mH.sub.2 Owherein O<x.ltoreq.0.5, m is a positive number, and A.sup.n- represents an anion having a valence of n, or a product resulting from surface-treatment of said hydrotalcite with an anionic surface-active agent, said hydrotalcite having a BET specific surface area of not more than 30 m.sup.2 /g; and a thermoplastic resin composition prepared by aforesaid method.
    Type: Grant
    Filed: May 16, 1980
    Date of Patent: November 10, 1981
    Assignee: Kyowa Chemical Industry Co. Ltd.
    Inventors: Shigeo Miyata, Masataka Kuroda
  • Halogenated cyclopentadiene diadducts of diacetylenic compounds
    Patent number: 4299758
    Abstract: Halogenated compounds of the formula ##STR1## wherein each X is independently selected from the group consisting of hydrogen, chlorine, bromine and fluorine, each X.sub.1 is independently selected from the group consisting of hydrogen, chlorine, bromine, fluorine and alkyl or alkoxy of 1 to 10 carbon atoms and halogen-substituted alkyl or alkoxy of 1 to 10 carbon atoms and each Y and Y.sub.1 is independently selected from the group consisting of hydrogen, chlorine, bromine, fluorine, aryl, alkyl or alkoxy of 1 to 10 carbon atoms and halogen-substituted alkyl or alkoxy of 1 to 10 carbon atoms, and a process for preparing these compounds are provided. These compounds are useful as flame retardant additives for various polymers.
    Type: Grant
    Filed: December 22, 1977
    Date of Patent: November 10, 1981
    Assignee: National Distillers and Chemical Corp.
    Inventors: James A. Hinnenkamp, Jack Kwiatek