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).

  • Dispersing agents in nanocomposites
    Patent number: 7837899
    Abstract: The instant invention discloses a composition, preferably a nanocomposite material, comprising (a) a synthetic polymer, (b) a filler selected from 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: Grant
    Filed: February 23, 2004
    Date of Patent: November 23, 2010
    Assignee: Polymers Australia Pty. Ltd.
    Inventors: Graeme Moad, George Philip Simon, Katherine Maree Dean, Guoxin Li, Roshan Tyrrel Anton Mayadunne, Hendrik Wermter, Rudolf Pfaendner
  • Functionalized polymers
    Patent number: 7807757
    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: October 17, 2007
    Date of Patent: October 5, 2010
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Rudolf Pfaendner, Heinz Herbst, Kurt Hoffmann, Samuel Evans, Alfred Steinmann
  • Composition and process for the controlled synthesis of block copolymers
    Patent number: 7807764
    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: Grant
    Filed: June 25, 2009
    Date of Patent: October 5, 2010
    Inventors: Hendrik Wermter, Dirk Simon, Rudolf Pfaendner
  • METHOD OF PREPARING ETHYLENE POLYMERS BY CONTROLLED HIGH PRESSURE POLYMERIZATION
    Publication number: 20100210800
    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 (Poyldispersity Index PD=1.2-4.5).
    Type: Application
    Filed: June 24, 2009
    Publication date: August 19, 2010
    Applicant: CIBA CORPORATION
    Inventors: MICHAEL ROTH, RUDOLF PFAENDNER, GERHARD LUFT, FRANK FREIDEL
  • SYMMETRIC AZO COMPOUNDS IN FLAME RETARDANT COMPOSITIONS
    Publication number: 20100144935
    Abstract: The invention, relates to azo-compounds of formula (I), wherein >N—O—R substituted 2,2,6,6,-tetraalkyl-piperidyl groups are present. These azo-compounds have excellent flame retardant properties, either if applied alone, or combined with other compounds, having flame retardant properties.
    Type: Application
    Filed: February 13, 2008
    Publication date: June 10, 2010
    Applicant: CIBA CORPORATION
    Inventors: Michael Roth, Rudolf Pfaendner, Carl-Eric Wilen, Melanie Aubert
  • Stabilization of thermoplastic nanocomposites
    Patent number: 7723412
    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: Grant
    Filed: January 8, 2004
    Date of Patent: May 25, 2010
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Hendrik Wermter, Rudolf Pfaendner
  • Process for chain stopping of PVC polymerization
    Patent number: 7683144
    Abstract: The present invention relates to a process and composition for the chain stopping of vinyl chloride polymerization or copolymerization in the presence of a stable free nitroxyl radical and a phenolic antioxidant. A further subject of the invention is the use of a stable free nitroxyl radical together with a phenolic antioxidant as a chain stopping mixture for the vinyl chloride polymerization or copolymerization. A further aspect of the invention is the use of higher sterically hindered nitroxyl radicals alone as chain stopping agents for the vinyl chloride polymerization.
    Type: Grant
    Filed: April 24, 2003
    Date of Patent: March 23, 2010
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Rudolf Pfaendner, Alex Wegmann, Thomas Wannemacher, Dietrich Braun
  • DISPERSING AGENTS IN COMPOSITES
    Publication number: 20100069557
    Abstract: The present invention is directed to compositions comprising (a) a synthetic polymer, (b) a talc as a filler, wherein the talc particles have a mean particle size of from 0.4 to 25 ?m, and are present in an amount of from 0.1 to 10% based on the weight of component (a) and (c) a dispersing agent which is based on a non-ionic surfactant or an amphiphilic statistical, block or comb copolymer, provided that when the synthetic polymer (a) is a polyamide, this is present in an amount of less than 55% based on the weight of (a), (b) and (c).
    Type: Application
    Filed: September 18, 2006
    Publication date: March 18, 2010
    Applicant: POLYMERS AUSTRALIA PTY. LIMITED
    Inventors: Graeme Moad, Li Guoxin, Jonathan Andrew Campbell, Hendrik Wermter, Rudolf Pfaendner
  • Process For The Preparation Of Polyamides In The Presence of a Phosphonate
    Publication number: 20100036083
    Abstract: The invention relates to the preparation of polyamides in the presence of a phosphonate, which is already added at the beginning of the polycondensation or polyaddition process. The resulting prepolymer exhibits a high molecular weight and is almost colorless. A further aspect of the invention is the use of a phosphonate for increasing the molecular weight and modification of polyamides during polycondensation.
    Type: Application
    Filed: June 28, 2006
    Publication date: February 11, 2010
    Applicant: CIBA SPECIALTY CHEMICALS CORPORATION
    Inventors: Jochen Fink, Rudolf Pfaendner, Dirk Simon, Constantine D. Papaspyrides, Stamatina N. Vougiouka
  • Liquid polymeric phosphites and phosphonites as stabilizers
    Publication number: 20100029844
    Abstract: Novel liquid polymeric compounds of the formula (I) wherein the general symbols are as defined in claim 1, are disclosed as stabilizers for protecting organic materials against oxidative, thermal or light-induced degradation.
    Type: Application
    Filed: August 30, 2007
    Publication date: February 4, 2010
    Inventors: Jochen Fink, Rudolf Pfaendner, Roswell Easton King, Sai Ping Shum, Stanley J. Padegimas
  • Grafting of nitroxyl terminated oligomers or polymers onto thermoplastic polymers
    Patent number: 7632891
    Abstract: The instant invention relates to a process for the preparation of grafted polymers wherein in a first step A) a oligomer or polymer is prepared by controlled radical polymerization in the presence of a stable free nitroxyl radical or a nitroxylether to obtain a nitroxyl terminated oligomer or polymer and in a second step B) the nitroxyl terminated oligomer or polymer is mixed and reacted with a thermoplastic or elastomeric polymer or copolymer in its molten state at a temperature at which cleavage of the nitroxyl-polymer/oligomer bond occurs, whereby the nitroxyl terminated oligomer or polymer is grafted onto the thermoplastic or elastomeric polymer. A further subject of the present invention is a grafted polymer prepared by said process.
    Type: Grant
    Filed: June 12, 2003
    Date of Patent: December 15, 2009
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Jochen Fink, Michael Roth, Rudolf Pfaendner
  • Method of producing comb block-copolymers from epoxy-functionalized nitroxylethers and anionically polymerizable monomers
    Publication number: 20090306294
    Abstract: The invention pertains to a method of producing comb block copolymers from epoxy-functionalized nitroxylethers and further monomers by anionic polymerization followed by nitroxyl mediated controlled free radical polymerization. The block copolymer backbone has defined initiating points where radical grafting of ethylenically unsaturated monomers can take place. Further aspects of the invention are comb block copolymers obtained by this process and the use of such polymers for plastic applications.
    Type: Application
    Filed: April 24, 2006
    Publication date: December 10, 2009
    Inventors: Jochen Fink, Rudolf Pfaendner
  • Process for the Preparation of Star and Block-Copolymers Via Epoxy-Functionalized Alkoxyamines
    Publication number: 20090299013
    Abstract: The instant invention relates to a process for the preparation of star and block-copolymers, which are prepared by controlled free radical polymerization using epoxy-functionalized alkoxyamines and multifunctional compounds capable of reacting with the epoxy group.
    Type: Application
    Filed: March 27, 2006
    Publication date: December 3, 2009
    Inventors: Jochen Fink, Rudolf Pfaendner, Andreas Kramer, Francesco Fuso
  • COMPOSITION AND PROCESS FOR THE CONTROLLED SYNTHESIS OF BLOCK COPOLYMERS
    Publication number: 20090258998
    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: June 25, 2009
    Publication date: October 15, 2009
    Inventors: Hendrik WERMTER, Dirk SIMON, Rudolf PFAENDNER
  • Process for the controlled increase in the molecular weight of polyethylenes
    Patent number: 7579411
    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: Grant
    Filed: February 12, 2008
    Date of Patent: August 25, 2009
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Michael Roth, Rudolf Pfaendner, Peter Nesvadba, Marie-Odile Zink
  • Composition and process for the controlled synthesis of block copolymers
    Patent number: 7572868
    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: Grant
    Filed: August 18, 2004
    Date of Patent: August 11, 2009
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Hendrik Wermter, Dirk Simon, Rudolf Pfaendner
  • Comb copolymers with defined side chains and process for their manufacture
    Patent number: 7528194
    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: Grant
    Filed: February 2, 2004
    Date of Patent: May 5, 2009
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Jochen Fink, Michael Roth, Rudolf Pfaendner
  • 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