Patents Represented by Attorney Luther A. R. Hall
  • Patent number: 6649770
    Abstract: Compounds of formula I or II where R is an aryl moiety, such as phenyl, naphthyl or biphenylyl, or is phenyl substituted by one or more trifluoromethyl, bromo or cyano, and E1 and E2 are independently hydrogen, alkyl, aralkyl and the like are prepared by reaction of a benzotriazole substituted on the 5-position of the benzo ring by a halogen atom with a arylboronic acid or ester in the presence of a transition-metal catalyst, such as palladium (II) diacetate. The benzotriazole compounds of formula I are particularly efficacious as stabilizers for automotive coatings and candle wax.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: November 18, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Stephen D. Pastor, Andrew B. Naughton, Robert Detlefsen, Mervin G. Wood, Joseph Suhadolnik, Anthony DeBellis, Deborah DeHessa
  • Patent number: 6638997
    Abstract: Hindered amines substituted on the N-atom with an —O—E—OH moiety are particularly effective in stabilizing polyolefin and automotive coating compositions against the deleterious effects of oxidative, thermal and actinic radiation where the presence of the OH group on the compounds adds important properties not attainable by the use of normal —O—E moieties.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: October 28, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: James P. Galbo, Gerald A. Capocci, Nancy N. Cliff, Robert E. Detlefsen, Michael P. DiFazio, Ramanathan Ravichandran, Peter Solera
  • Patent number: 6599326
    Abstract: Chemical pulps or papers, especially kraft pulps or papers, which may still contain traces of lignin, have enhanced resistance to yellowing when they contain an effective stabilizing amount of a N,N-dialkylhydroxylamine, an ester, amide or thio substituted N,N-dialkylhydroxylamine or N,N-dibenzylhydroxylamine or an amminium salt thereof. This performance is often further enhanced by the presence of one or more coadditives selected from the group consisting of the UV absorbers, the polymeric inhibitors, the nitrones, the fluorescent whitening agents and metal chelating agents. Combinations of hydroxylamines or their salts, benzotriazole or benzophenone UV absorbers and a metal chelating agent are particularly effective. N,N-Diethylhydroxylamine and N,N-dibenzylhydroxylamine and their acid salts are surprisingly effective for this purpose.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: July 29, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Raymond Seltzer, David Devore, Glen T. Cunkle, Cyril Heitner, John A. Schmidt, Peter F. McGarry, Jean-Pierre Wolf, Randall B. Nelson
  • Patent number: 6596445
    Abstract: Oximeester compounds of the formulae I, II, III and IV wherein R1 is phenyl, C1-C20alkyl or C2-C20alkyl optionally interrupted by —O—, C2-C20alkanoyl or benzoyl, or R1 is C2-C12alkoxycarbonyl or phenoxycarbonyl; R1′ is C2-C12alkoxycarbonyl, or R1′ is phenoxycarbonyl, or R1′ is —CONR10R11 or CN; R2 is C2-C12alkanoyl, C4-C6alkenoyl, benzoyl, C2-C6alkoxycarbonyl or phenoxycarbonyl; R3, R4, R5, R6 and R7 are hydrogen, halogen, C1-C12alkyl, cyclopentyl, cyclohexyl, phenyl, benzyl, benzoyl, C2-C12alkanoyl, C2-C12alkoxycarbonyl, phenoxycarbonyl or a group OR8, SR9, SOR9, SO2R9 or NR10R11; R4′, R5′ and R6′ are hydrogen, halogen, C1-C12alkyl, cyclopentyl, cyclohexyl, phenyl, benzyl, benzoyl, C2-C12-alkanoyl, C2-C12alkoxycarbonyl, phenoxycarbonyl, or are a group OR8, SR9, SOR9, SO2R9, NR10R11; provided that at least one of R3, R4, R5, R6, R7, R′4, R′5 and R′6 is OR8, SR9 or NR10R11; R8, R9, R10 and R11 are for example hydrogen, C
    Type: Grant
    Filed: June 23, 1999
    Date of Patent: July 22, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Akira Matsumoto, Hidetaka Oka, Masaki Ohwa, Hisatoshi Kura, Jean-Luc Birbaum, Kurt Dietliker
  • Patent number: 6586507
    Abstract: Hindered amines substituted on the N-atom with an —O—E—OH moiety are particularly effective in stabilizing polyolefin and automotive coating compositions against the deleterious effects of oxidative, thermal and actinic radiation where the presence of the OH group on the compounds adds important properties not attainable by the use of normal —O—E moieties.
    Type: Grant
    Filed: October 3, 2001
    Date of Patent: July 1, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: James Peter Galbo, Gerald A. Capocci, Nancy N. Cliff, Robert E. Detlefsen, Michael P. DiFazio, Ramanathan Ravichandran, Peter Solera, Christophe Bulliard
  • Patent number: 6586519
    Abstract: 2-Hydroxybenzophenone derivatives substituted in the 4′-position by a thioether moiety exhibit enhanced absorption in the UV at longer wavelength. Compositions comprising organic material subject to actinic degradation are beneficially stabilized with such derivatives.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: July 1, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Joseph Suhadolnik, Carmen Hendricks, Roger Meuwly
  • Patent number: 6579328
    Abstract: Sterically hindered N-substituted aryloxyamines are prepared by the transition-metal-catalyzed decomposition of diazonium salts in the presence of a sterically hindered nitroxyl radical. These compounds are useful as thermal and light stabilizers for a variety of organic substrates.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: June 17, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Stephen D. Pastor, Sai Ping Shum
  • Patent number: 6576797
    Abstract: 2-Hydroxybenzophenone derivatives substituted in the 4′-position by a thioether moiety exhibit enhanced absorption in the UV at longer wavelength. Compositions comprising organic material subject to actinic degradation are beneficially stabilized with such derivatives.
    Type: Grant
    Filed: March 31, 1994
    Date of Patent: June 10, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Joseph Suhadolnik, Carmen Hendricks, Roger Meuwly
  • Patent number: 6562084
    Abstract: White, dyed, dipped, unscented and/or scented candle wax is effectively stabilized against discoloration and fading by the incorporation therein of a piperazindione in combination with a UV absorber and/or an antioxidant.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: May 13, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Mervin G. Wood, Andrea R. Smith, Deborah DeHessa
  • Patent number: 6562083
    Abstract: White, dyed, dipped, unscented and/or scented candle wax is effectively stabilized against discoloration and fading by the incorporation therein of an s-triazine UV absorber plus a classic hindered amine and/or an antioxidant.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: May 13, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Mervin G. Wood, Andrea R. Smith, Deborah DeHessa
  • Patent number: 6547841
    Abstract: Sterically hindered N-substituted alkoxyamines are prepared by the transition-metal-catalyzed decomposition of diazonium salts in the presence of a sterically hindered nitroxyl radical. These compounds are useful as thermal and light stabilizers for a variety of organic substrates.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: April 15, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Stephen D. Pastor, Sai Ping Shum
  • Patent number: 6547840
    Abstract: White, dyed, dipped, unscented and/or scented candle wax is effectively stabilized against discoloration and fading by the incorporation therein of an imidazolidine in combination with a UV absorber and/or an antioxidant.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: April 15, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Mervin G. Wood, Andrea R. Smith, Deborah DeHessa
  • Patent number: 6544304
    Abstract: White, dyed, dipped, unscented and/or scented candle wax is effectively stabilized against discoloration and fading by the incorporation therein of a morpholinone in combination with a UV absorber and/or an antioxidant.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: April 8, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Mervin G. Wood, Andrea R. Smith, Deborah DeHessa
  • Patent number: 6544305
    Abstract: White, dyed, dipped, unscented and/or scented candle wax is effectively stabilized against discoloration and fading by the incorporation therein of a piperazinone in combination with a UV absorber and/or an antioxidant.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: April 8, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Mervin G. Wood, Andrea R. Smith, Deborah DeHessa
  • Patent number: 6545071
    Abstract: A stabilizer mixture containing A) for example at least one compound of the formula (I)  wherein the radicals R1, independently of one another, are hydrogen, C1-C8alkyl, —O, —CH2CN, C3-C6alkenyl, C7-C9phenylalkyl, C7-C9phenylalkyl which is substituted on the phenyl radical by C1-C4alkyl; or C1-C8acyl; and B) magnesium oxide, magnesium hydroxide, zinc oxide, zinc hydroxide or an organic salt of zinc or magnesium, or a hydrotalcite; and C) either (C1) an UV absorber or (C2) a pigment or (C3) an UV absorber and a pigment. Such a stabilizer mixture is particularly useful for stabilizing a polyolefin against light-induced degradation.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: April 8, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventor: François Gugumus
  • Patent number: 6541547
    Abstract: Polyolefin mouldings which have excellent stability on permanent contact with extracting media comprise, as stabilizers, a selected mixture comprising an organic phosphite or phosphonite and a specially selected group of sterically hindered phenols or a certain group of sterically hindered amines. In addition, a selected three-component mixture comprising a phosphite or phosphonite, a phenolic antioxidant and a certain group of sterically hindered amines is particularly suitable as stabilizer for polyolefin moldings which are in permanent contact with extracting media.
    Type: Grant
    Filed: September 9, 1996
    Date of Patent: April 1, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Thomas Schmutz, Erich Kramer, Hans Zweifel, Bruno Rotzinger
  • Patent number: 6540795
    Abstract: White, dyed, dipped, unscented and/or scented candle wax is effectively stabilized against discoloration and fading by the incorporation therein of an oxazolidine in combination with a UV absorber and/or an antioxidant.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: April 1, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Mervin G. Wood, Andrea R. Smith, Deborah DeHessa, Sai Ping Shum
  • Patent number: 6525158
    Abstract: Recycled mixtures of plastics, predominantly thermoplastics, as predominantly produced in the household, in commerce and also in industry and useful material collections, can be stabilized against thermooxidative degradation by adding a combination of a sterically hindered phenol with an organic phosphite or phosphonite and an inorganic compound from the series consisting of metal oxides, hydroxides and carbonates.
    Type: Grant
    Filed: September 17, 1997
    Date of Patent: February 25, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Kurt Hoffmann, Heinz Herbst, Rudolf Pfaendner, Hans-Jürgen Sander, Franciszek Sitek
  • Patent number: 6521681
    Abstract: Organic materials which possess outstanding stability to oxidative, thermal or light-induced degradation comprise as stabilizers at least one compound of the benzofuran-2-one type and at least one compound of the sterically hindered amine type.
    Type: Grant
    Filed: June 23, 1997
    Date of Patent: February 18, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Jürg Zingg, Jean-Roch Pauquet, Christoph Kröhnke
  • Patent number: 6515051
    Abstract: Benzotriazole UV absorbers which are substituted at the 5-position of the benzo ring by an electron withdrawing group exhibit enhanced durability and very low loss rates when incorporated into automotive coatings. This is particularly the case when the 3-position of the phenyl ring is also substituted by phenyl or phenylalkyl such as &agr;-cumyl. Compounds where the 5-position of the benzo ring are substituted by perfluoroalkyl such as trifluoromethyl are particularly of interest for both their enhanced durability and for their excellent solubility and excellent color properties in some thermoplastic compositions when the phenyl ring is substituted at the 3-position by hydrogen or tert-alkyl.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: February 4, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Ramanathan Ravichandran, Joseph Suhadolnik, Mervin G. Wood, Anthony Debellis, Robert E. Detlefsen, Revathi Iyengar, Jean-Pierre Wolf