Patents Assigned to Petrecycle Pty Ltd.
  • Production of improved polymers via the use of star cores
    Patent number: 6646062
    Abstract: There is provided a process for producing high molecular weight polymer comprising the step of reacting one or more preformed linear polymers with one or more cores (as hereinbefore defined) to form high molecular weight polymers, wherein the preformed linear polymers are at a temperature in the range from the melting point of the preformed linear polymers to 330° C.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: November 11, 2003
    Assignee: Petrecycle Pty Ltd
    Inventor: Simon Michael West
  • Conversion of contaminated polyethylene terephthalate to decontaminated polybutylene terephthalate
    Patent number: 6518322
    Abstract: Decontaminated crushed polyethylene terephthalate is converted to decontaminated PBT withtout requiring a catalyst by mixing with 1,4-butanediol under reduced pressure, transeterifying at 120-190° C., distilling off ethanediol and tetrahydrofuran under sub-atomspheric pressure. The method lowers costs, and decreases wasteful by-products and removes contaminants present in post-consumer PET, (e.g. paper, pigments, plastics, dyes, mineral sands, and clays) and chemical and water insoluble contaminants.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: February 11, 2003
    Assignee: Petrecycle Pty Ltd.
    Inventor: Simon M. West