Patents by Inventor Rudolf Pfaendner

Rudolf Pfaendner has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Azo Compounds for Polypropylene Degradation
    Publication number: 20090105425
    Abstract: The invention relates to a process and compositions suitable for reducing by heat the molecular weight of polypropylene, propylene copolymers or polypropylene blends. Azo compounds bearing different substituents are added to the polymers.
    Type: Application
    Filed: March 29, 2006
    Publication date: April 23, 2009
    Inventors: Michael Roth, Rudolf Pfaendner, Carl-Eric Magnus Wilen, Ronan Nicolas
  • Method of Preparing Ethylene Polymers by Controlled High Pressure Polymerization
    Publication number: 20080234453
    Abstract: The present invention relates to a method for the radical polymerization or copolymerization of ethylene at high pressures using a hydroxylamine ester as radical initiator. The hydroxylamine esters according to the invention are suitable initiators for the high pressure polymerization of ethylene leading to high molecular weight polyethylenes with narrow molecular weight distributions (Polydispersed Index PD=1.2?4.5).
    Type: Application
    Filed: March 14, 2005
    Publication date: September 25, 2008
    Inventors: Michael Roth, Rudolf Pfaendner, Gerhard Luft, Frank Freidel
  • Process for the controlled increase in the molecular weight of polyethylenes
    Publication number: 20080146740
    Abstract: The invention relates to hydroxylamine esters and polymerizable compositions comprising these hydroxylamine esters and an ethylenically unsaturated monomer or oligomer and methods for achieving a controlled increase in the molecular weight of polyethylene.
    Type: Application
    Filed: February 12, 2008
    Publication date: June 19, 2008
    Inventors: Michael Roth, Rudolf Pfaendner, Peter Nesvadba, Marie-Odile Zink
  • Process for the controlled increase in the molecular weight of polyethylenes
    Patent number: 7358365
    Abstract: The invention relates to novel cyclic hydroxylamine esters and to the use of known hydroxylamine esters selected from the group consisting of HALS (sterically hindered amine) compounds and the novel hydroxylamine esters achieving a controlled increase in the molecular weight of polyethylene.
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: April 15, 2008
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Michael Roth, Rudolf Pfaendner, Peter Nesvadba, Marie-Odile Zink
  • Functionalized polymers
    Publication number: 20080051521
    Abstract: This invention relates to a process for stabilising and at the same time phase compatibilising plastics or plastic compositions by incorporating polymeric compounds obtainable by reacting a compound selected from the group consisting of the sterically hindered phenols, sterically hindered amines, lactones, sulfides, phosphites, benzotriazoles, benzophenones and 2-(2-hydroxyphenyl)-1,3,5-triazines, which compounds contain at least one reactive group, with a compatibilisator.
    Type: Application
    Filed: October 17, 2007
    Publication date: February 28, 2008
    Inventors: Rudolf PFAENDNER, Heinz HERBST, Kurt HOFFMANN, Samuel EVANS, Alfred STEINMANN
  • 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
  • Functionalised polymers
    Patent number: 7300978
    Abstract: This invention relates to a process for stabilising and at the same time phase compatibilising plastics or plastic compositions by incorporating polymeric compounds obtainable by reacting a compound selected from the group consisting of the sterically hindered phenols, sterically hindered amines, lactones, sulfides, phosphites, benzotriazoles, benzophenones and 2-(2-hydroxyphenyl)-1,3,5-triazines, which compounds contain at least one reactive group, with a compatibilisator.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: November 27, 2007
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Rudolf Pfaendner, Heinz Herbst, Kurt Hoffmann, Samuel Evans, Alfred Steinmann
  • 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
  • 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
  • Process for the preparation of polyolefin nanocomposites
    Publication number: 20070142534
    Abstract: The instant invention discloses a process for the preparation a polyolefin nanocomposite which comprises melt mixing a mixture of a polyolefin, a filler and a non-ionic surfactant.
    Type: Application
    Filed: November 3, 2003
    Publication date: June 21, 2007
    Inventors: Graeme Moad, George Simon, Katherine Dean, Guoxin Li, Roshan Tyrrel Mayadunne, Rudolf Pfaendner, Hendrik Wermter, Armin Schneider
  • Dispersing agents in nanocomposites
    Publication number: 20070072979
    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) a dispersing agent prepared by controlled free radical polymerization (CFRP).
    Type: Application
    Filed: February 23, 2004
    Publication date: March 29, 2007
    Inventors: Graeme Moad, George Simon, Katherine Dean, Guoxin Li, Roshan Tyrrel Mayadunne, Hendrik Wermter, Rudolf Pfaendner
  • Molecular weight increase and modification of polycondensates
    Publication number: 20070055047
    Abstract: The present invention relates to a process for increasing the molecular weight and for the modification of polycondensates, to the use of an additive blend effecting the increase in molecular weight without imparting color to the polycondensates as well as to the polycondensates obtainable by that process. The additive blend contains at least one bis-acyllactam, at least one phosphite, phosphinate or phosphonate; or at least one benzofuran-2-one type compound or at least one phosphite, phosphinate or phosphonate and one benzofuran-2-one type compound.
    Type: Application
    Filed: September 15, 2004
    Publication date: March 8, 2007
    Inventors: Dirk Simon, Rudolf Pfaendner
  • Composition and process for the controlled synthesis of block copolymers
    Publication number: 20060287451
    Abstract: The present invention relates to a polymerizable composition comprising a) at least one ethylenically unsaturated monomer and b) at least one hydroxylamine of high molecular weight, preferably a long chain alkyl substituted hydroxylamine. Further aspects of the present invention are a process for polymerizing ethylenically unsaturated monomers, and the use of high molecular weight hydroxylamines for controlled polymerization.
    Type: Application
    Filed: August 18, 2004
    Publication date: December 21, 2006
    Applicant: CIBA SPECIALTY CHEMICALS HOLDINGS INC.
    Inventors: Hendrik Wermter, Dirk Simon, Rudolf Pfaendner
  • Acrylic dispersing agents in nanocomposites
    Publication number: 20060235127
    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: Application
    Filed: June 14, 2004
    Publication date: October 19, 2006
    Inventors: Graeme Moad, George Simon, Katherine Dean, Guoxin Li, Roshan Mayadunne, Ezio Rizzardo, Richard Evans, Hendrik Wermter, Rudolf Pfaendner
  • Comb copolymers with defined side chains and process for their manufacture
    Publication number: 20060194053
    Abstract: The present invention relates to the modification of copolymers, in particular of grafted copolymers into comb copolymers. The modification comprises the steps (i) of controlled radical polymerization of a polymer or copolymer bearing a epoxide group at one end resulting from the initiation step, and (ii) a heating step of the polymer prepared under (i) and a copolymer bearing a functional group either in the backbone or attached to a side chain, which is able to react with the epxide group. The result is a comb copolymer with well controlled chain length of the grafted side arms expressed for example by a low polydispersity.
    Type: Application
    Filed: February 2, 2004
    Publication date: August 31, 2006
    Inventors: Jochen Fink, Michael Roth, Rudolf Pfaendner
  • Composition and process for enhancing controlled free radical polymerization
    Patent number: 7074860
    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: September 18, 2001
    Date of Patent: July 11, 2006
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Wiebke Wunderlich, Rudolf Pfaendner
  • Process for the controlled increase in the molecular weight of polyethylenes
    Publication number: 20060128903
    Abstract: The invention relates to novel cyclic hydroxylamine esters and to the use of known hydroxylamine esters selected from the group consisting of HALS (sterically hindered amine) compounds and the novel hydroxylamine esters achieving a controlled increase in the molecular weight of polyethylene.
    Type: Application
    Filed: January 25, 2006
    Publication date: June 15, 2006
    Inventors: Michael Roth, Rudolf Pfaendner, Peter Nesvadba, Marie-Odile Zink
  • Stabilization of thermoplastic nanocomposites
    Publication number: 20060122308
    Abstract: The instant invention discloses a nanocomposite material comprising (a) a synthetic polymer, (b) a natural or synthetic phyllosilicate or a mixture of such phyllosilicates in nanoparticles, (c) a phenolic antioxidant and/or a processing stabilizer, and (d) a mono or polyfunctional compound selected from the class consisting of the epoxides, oxazolines, oxazolones, oxazines, isocyanates and/or anhydrides.
    Type: Application
    Filed: January 8, 2004
    Publication date: June 8, 2006
    Inventors: Hendrik Wermter, Rudolf Pfaendner
  • Composition and process for enhancing controlled free radical polymerization
    Publication number: 20060094828
    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: Application
    Filed: December 12, 2005
    Publication date: May 4, 2006
    Inventors: Wiebke Wunderlich, Rudolf Pfaendner