Patents by Inventor Roshan Tyrrel Mayadunne

Roshan Tyrrel Mayadunne 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).

  • 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
  • Polymerization process with living characteristics and polymers made therefrom
    Patent number: 6747111
    Abstract: A free radical polymerization process suitable for synthesizingpolymers is disclosed. The process utilizes novel sulfur based chain transfer agents and is widely compatible over a range of monomers and reaction conditions. Novel polymers having low pollydispersity and predictable specific polymer architecture and molecular weight are produced by the process. The polymers produced by the process are suitable for use as binders in automotive OEM and refinish coatings.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: June 8, 2004
    Assignees: E. I. du Pont de Nemours and Company, Commonwealth Scientific and Industrial Research Organization
    Inventors: John Chiefari, Roshan Tyrrel Mayadunne, Graeme Moad, Ezio Rizzardo, San Hoa Thang
  • Polymerization process with living characteristics and polymers made therefrom
    Publication number: 20040024132
    Abstract: A free radical polymerization process suitable for synthesizingpolymers is disclosed. The process utilizes novel sulfur based chain transfer agents and is widely compatible over a range of monomers and reaction conditions. Novel polymers having low polydispersity and predictable specific polymer architecture amd molecular weight are produced by the process. The polymers produced by the process are suitable for use as binders in automotive OEM and refinish coatings.
    Type: Application
    Filed: July 18, 2003
    Publication date: February 5, 2004
    Inventors: John Chiefari, Roshan Tyrrel Mayadunne, Graeme Moad, Ezio Rizzardo, San Hoa Thang
  • Polymerization process with living characteristics and polymers made therefrom
    Patent number: 6642318
    Abstract: A free radical polymerization process suitable for synthesizing polymers is disclosed. The process utilizes novel sulfur based chain transfer agents and is widely compatible over a range of monomers and reaction conditions. Novel polymers having low polydispersity and predictably specific polymer architecture and molecular weight are produced by the process. The polymers produced by the process are suitable for use as binders in automotive OEM and refinish coatings.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: November 4, 2003
    Assignees: E. I. du Pont de Nemours and Company, Commonwealth Scientific and Industrial Research Organization
    Inventors: John Chiefari, Roshan Tyrrel Mayadunne, Graeme Moad, Ezio Rizzardo, San Hoa Thang