Patents Assigned to Ciba Specialty Chemicals Corp.
  • Micropigment mixtures
    Patent number: 7357918
    Abstract: Disclosed is a UV absorber mixture, comprising (a) 1% to 60% of a micronised UV broadband absorber of formula: Formula (I); wherein R1 is C1-C12alkyl; or phenyl-substituted C1-C12alkyl; and (b) 1% to 60% by weight of a water dispersible and/ir oil-dispersible coated titanium di-oxide.
    Type: Grant
    Filed: January 23, 2003
    Date of Patent: April 15, 2008
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Christine Comte, Sébastien Mongiat
  • Crosslinking of unsaturated polymers by the use of hydroxylamine-esters
    Patent number: 7358311
    Abstract: The instant invention relates to a process for crosslinking unsaturated polymer resins as e.g. unsaturated polyesters using hydroxyamine esters as radical source. Further aspects of the invention are a composition comprising unsaturated polymer resins as e.g. unsaturated polyester resins and a hydroxylamine ester and the use of hydroxylamine esters for crosslinking unsaturated polymers.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: April 15, 2008
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Michael Roth, Dirk Simon
  • Method of dyeing keratin-containing fibres
    Patent number: 7354572
    Abstract: A method of dyeing keratin-containing fibers, especially human hair, which comprises using dyes of formula (1), wherein X? is an anion.
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: April 8, 2008
    Assignee: Ciba Specialty Chemicals Corp.
    Inventor: Peter Möckli
  • UV absorber compositions comprising a hydroxyphenyltriazine compound
    Patent number: 7344706
    Abstract: UV absorber compositions are described, comprising (a) from 1 to 99% by weight of a hydroxyphenyltriazine compound of formula (I) wherein R1, R2 and R3 are each independently of the others C1-C18alkyl; C2-C10,alkenyl; or phenyl-C1-C4 alkyl; R4 is hydrogen; or C1-C5alkyl; and (b) from 99 to 1% by weight of a further UV absorber selected from the group of (b) hydroxyphenyltriazines that are different from component (a), (b2) benzotriazoles, (b3) dibenzoylmethane derivatives and (b4) camphor derivatives.
    Type: Grant
    Filed: March 4, 2003
    Date of Patent: March 18, 2008
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Jürg Haase, Thomas Ehlis, Elek Borsos, Dietmar Hüglin, Bernd Herzog
  • Yellow anionic disazo dyes
    Patent number: 7341607
    Abstract: The present invention relates to novel yellow anionic dyes, a process for their preparation, certain novel intermediates for their preparation and the use of these dyes for dyeing natural or synthetic materials, in particular, paper.
    Type: Grant
    Filed: May 27, 2003
    Date of Patent: March 11, 2008
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Michael Lennartz, Adolf Käser, Sandra Weiss
  • Composition and process for enhancing controlled free radical polymerization
    Patent number: 7323517
    Abstract: The present invention relates to a composition and process for enhancing the controlled radical polymerization in the presence of nitroxyls and nitroxylethers by adding a chain transfer agent selected from the group consisting of mercaptanes, thioethers and disulfides to the polymerizable mixture. A further subject of the invention is the use of mercaptanes, thioethers and disulfides for increasing rate and yield of controlled radical polymerizations in the presence of a nitroxyl or a nitroxylether.
    Type: Grant
    Filed: December 12, 2005
    Date of Patent: January 29, 2008
    Assignee: Ciba Specialty Chemicals Corp
    Inventors: Wiebke Wunderlich, Rudolf Pfaendner
  • Aqueous dispersions for antioxidants
    Patent number: 7323505
    Abstract: The present invention relates to aqueous dispersions for solid phenolic antioxidants, wherein the antioxidants are dispersed in the aqueous phase with polyvinyl alcohol as dispersing agent. The invention also relates to a process, which comprises stabilising a polymer material against oxidative, thermal or light-induced degradation by adding to the polymer the aqueous dispersion.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: January 29, 2008
    Assignee: Ciba Specialty Chemicals Corp.
    Inventor: Daniel Thibaut
  • Open-chain alkoxyamines and their corresponding nitroxides for controlled low temperature radical polymerization
    Patent number: 7297819
    Abstract: The present invention relates to open chain alkoxyamine compounds, a polymerizable composition comprising a) at least one ethylenically unsaturated monomer and b) at least one open chain alkoxyamine compound. Further aspects of the present invention are a process for polymerizing ethylenically unsaturated monomers, and the use of open chain alkoxyamine compounds for controlled polymerization. The intermediate N-oxyl derivatives, a composition of the N-oxyl derivatives with ethylenically unsaturated monomers and a free radical initiator X, as well as a process and their use for polymerization are also subjects of the present invention.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: November 20, 2007
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Tobias Hintermann, Peter Nesvadba, Andreas Kramer, Jochen Fink
  • Highly compatible hydroxyphenyltriazine UV-absorbers
    Patent number: 7294714
    Abstract: The present invention relates to highly compatible hydroxyphenyltriazine UV-absorbers and to their use in protecting plants in green houses and the protection of foodstuffs, beverages, pharmaceuticals, cosmetics, personal care products, shampoos and the like from the deleterious effects of ultraviolet radiation. It has been found that certain highly compatible tris-aryl-s-triazines are especially effective towards this end when incorporated in the containers or films in which such materials are stored.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: November 13, 2007
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Dario Lazzari, David George Leppard, Massimiliano Sala, Manuele Vitali, Graziano Zagnoni, Gianluca Ferri
  • Method of producing comb or star copolymers using epoxy-functionalized nitroxylethers
    Patent number: 7291682
    Abstract: The present invention provides a method of forming comb or star copolymers. The comb or star copolymers are useful in surface modification of thermoplastic materials or as surfactants. The method is aimed at attaching a polymeric side chain differing in polarity and chemical structure from the backbone and forming a comb or star copolymer structure. In particular the process comprises polymerizing in a first step a polymer backbone from epoxy and nitroxylether group containing monomers and in a second step polymerizing under controlled radical conditions a comb or star structure onto this backbone.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: November 6, 2007
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Wiebke Wunderlich-Wippert, Rudolf Pfaendner, Francesco Fuso, Jochen Fink
  • Acrylic dispersing agents in nanocomposites
    Patent number: 7288585
    Abstract: The instant invention discloses a composition, preferably a nanocomposite material, comprising (a) a synthetic polymer, (b) a filler such as for example a natural or synthetic phyllosilicate or a mixture of such phyllosilicates, preferably in nanoparticles, and (c) as dispersing agent a polymer based on a long chain alkyl meth(acryte).
    Type: Grant
    Filed: June 14, 2004
    Date of Patent: October 30, 2007
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Graeme Moad, George Philip Simon, Katherine Maree Dean, Guoxin Li, Roshan Tyrrel Anton Mayadunne, Ezio Rizzardo, Richard Alexander Evans, Hendrik Wermter, Rudolf Pfaendner
  • N-alkoxy-4,4-dioxy-polyalkyl-piperidine compounds, their corresponding N-oxides and controlled radical polymerization therewith
    Patent number: 7288613
    Abstract: The present invention relates to selected 1-alkoxy-2,2,6,6 tetramethyl piperidine, 1-alkoxy-2,2 diethyl-6,6 dimethyl piperidine and 1-alkoxy-2,6 diethyl-2,3,6 dimethyl piperidine derivatives which are substituted in the 4 position by two oxygen atoms forming an open chain or cyclic ketal structure, a polymerizable composition comprising a) at least one ethylenically unsaturated monomer and b) said piperidine derivatives. Further aspects of the present invention are a process for polymerizing ethylenically unsaturated monomers, and the use of 1-alkoxy-2,2,6,6 tetramethyl piperidine, 1-alkoxy-2,2 diethyl-6,6 dimethyl piperidine and 1-alkoxy-2,6 diethyl-2,3,6 dimethyl piperidine derivatives which are substituted in the 4 position by two oxygen atoms forming an open chain or cyclic ketal structure for controlled polymerization.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: October 30, 2007
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Peter Nesvadba, Marie-Odile Zink, Wiebke Wunderlich
  • Transparent polymer articles of low thickness
    Patent number: 7265171
    Abstract: The novel transparent polyolefin, polyester or polyamide article disclosed is stabilized against the effects of light, oxygen, heat and agressive chemicals by addition of 0.005-0.30% by weight the polymeric substrate of a hydroxyphenyl triazine UV absorber, and is characterized by its thickness between 1 and 500 ?m. Preferred polyolefin articles thus stabilized are agricultural films containing as further stabilizer a sterically hindered amine. The novel compositions act as selective UV filter especially useful in agriculture.
    Type: Grant
    Filed: February 22, 2006
    Date of Patent: September 4, 2007
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: David George Leppard, François Gugumus, Michela Bonora
  • Phenolic antioxidants in crystalline form
    Patent number: 7262319
    Abstract: The invention relates to a process for preparing solid particles of a phenolic antioxidant from the IRGANOX series in the form of crystals, particularly IRGANOX 1010 and 1098, the crystal particles obtainable by the process, the further processing of the crystal particles, an aqueous dispersion comprising the phenolic antioxidant, novel crystal modifications of pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate] (?-form) and N,N?-hexane-1,6diyl-bis[3-(3,5-di-tert-butyl-4-hydroxypheylpropamide)] (?-form) and aqueous dispersion comprising the new crystal modifications.
    Type: Grant
    Filed: November 17, 2003
    Date of Patent: August 28, 2007
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Daniel Rehm, Johannes Schäfter, Paul Adriaan Van Der Schaaf, Christian Guckel
  • Thermoplastic compositions with enhanced melt flow and compatibility
    Patent number: 7253232
    Abstract: The instant invention relates to a composition of a thermoplastic polymer and a triblock-copolymer or grafted comb copolymer, with enhanced melt flow during processing. Further aspects of the invention are the triblock-copolymers or grafted comb polymers itself, a method for their production and their use as compatibilizers and meltflow enhancing additives. Yet another aspect of the invention are functional alkoxyamines, which are useful for the preparation of the triblock-copolymers or grafted comb polymers.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: August 7, 2007
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Rudolf Pfaendner, Jochen Fink, Wiebke Wunderlich-Wippert, Andreas Kramer
  • Fluorocarbon terminated oligo-and poly-carbonates as surface modifiers
    Publication number: 20070155854
    Abstract: The instant invention relates to new compounds of the formula I R1 and R2 are each independently of the other a fluorine containing group, R3 and R4 are each independently of the other hydrogen, a fluorine containing group, C1-C12alkyl, phenyl or R4, together with the carbon atom to which they are bonded, form a C5-C8-cycloalkylidene ring that is unsubstituted or substituted by from 1 to 3 C1-C4alkyl groups; R5, R6, R7 and R8 are each independently of the other hydrogen, C1-C12alkyl or C3-C12alkenyl, X1 and X2 are each independently of the other a direct bond or C1-C12alkylene, m is 1 to 10,000, and n is 0 to 10,000. These new compounds of the formula I are useful as reducers of surface energy for organic materials such as polycarbonates, polyesters or polyketones or their mixtures, blends or alloys.
    Type: Application
    Filed: December 8, 2004
    Publication date: July 5, 2007
    Applicant: CIBA SPECIALTY CHEMICALS CORP.
    Inventors: Martin Brunner, Alessandro Zedda, Michele Gerster, Fabien Brand
  • N-alkoxy-4,4-dioxy-polyalkyl-piperidines as radical polymerization inhibitors
    Patent number: 7235663
    Abstract: The present invention relates to selected glycidyl or carbonyl functional N-alkoxy-4,4-dioxy-polyalkyl-piperidine compounds forming an open chain or cyclic ketal structure, a polymerizable composition comprising a) at least one ethylenically unsaturated monomer and b) a glycidyl or carbonyl functional N-alkoxy-4,4-dioxy-polyalkyl-piperidine nitroxide initiator compound. Further aspects of the present invention are a process for polymerizing ethylenically unsaturated monomers and the use of glycidyl or carbonyl functional N-alkoxy-4,4-dioxy-polyalkyl-piperidine nitroxide initiators for radical polymerization.
    Type: Grant
    Filed: November 12, 2001
    Date of Patent: June 26, 2007
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Francesco Fuso, Wiebke Wunderlich, Andreas Kramer, Jochen Fink
  • Polypropylene resin compositions
    Patent number: 7235191
    Abstract: A polypropylene composition containing the components: a) a crystallizable polypropylene homopolymer, random copolymer, alternating or segmented copolymer, block copolymer or a blend of polypropylene with another synthetic polymer, and b) 0.001 to 5% relative to the weight of component (a), of a specific trimesic acid derivative.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: June 26, 2007
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Hans-Werner Schmidt, Paul Smith, Markus Blomenhofer
  • Flame retardant polymer compositions containing hydroxylamine esters
    Patent number: 7230042
    Abstract: The instant invention pertains to a thermoplastic organic polymer containing a conventional flame retardant and a hydroxylamine ester, in particular a tetraalkyl piperidine hydroxylamine ester. Further aspects of the invention are the use of hydroxylamine esters as flame retardants and a method for improving flame retardancy of a thermoplastic organic polymer.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: June 12, 2007
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Michael Roth, Dirk Simon, Grant Leslie, Peter Nesvadba, Roswell Easton King, Nikolas Kaprinidis
  • Process for the synthesis of cycloorganylphosphanes and di(alkyli metal/alkaline earth metal) oligophosphanediides
    Patent number: 7230137
    Abstract: The invention relates to a process for the preparation of cycloorganylphosphanes of formula 1 (R1P)n by reaction of dihalo(organyl)phosphanes of formula R1PHal2 with: a) activated zinc in an organic solvent, or with: b) an alkali metal or alkaline earth metal in a non-polar organic solvent in the presence of an activator, wherein R1 is C1–C12alkyl; C3–C12 cycloalkyl, aryl or heteroaryl, Hal is F, Cl, Br or I, and n is a number from 3 to 20. The invention relates also to novel di(alkali metal/alkaline earth metal) oligophosphanediides and to the use thereof in the preparation of organophosphorus compounds.
    Type: Grant
    Filed: November 24, 2003
    Date of Patent: June 12, 2007
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Hansjörg Grützmacher, Jens Geier, Hartmut Schönberg, Markus Scherer, Daniel Stein, Souâd Boulmaâz