Patents Assigned to Wedtech, (USA) Inc.
  • Foamable compositions for rotational molding
    Patent number: 5928584
    Abstract: Novel molding compositions consisting essentially of a mixture of a skin-forming component and a foam core-foaming component physically dry-blended together. The skin-forming component comprises two distinct phases blended together, a high zero-shear viscosity material and a low zero-shear viscosity material. The foam core-forming component preferably comprises a foamable polymeric material including a suitable blowing agent. In a preferred embodiment, the three materials are selected from suitable homopolymers and copolymers of ethylene.
    Type: Grant
    Filed: February 13, 1997
    Date of Patent: July 27, 1999
    Assignee: Wedtech (USA) Inc.
    Inventors: Clifford C. Lee, Donald T. Beuke, Andrew R. Feder, John Lefas, Salvatore D'Uva
  • Crosslinkable polyethylene-based composition for rotational molding
    Patent number: 5367025
    Abstract: A crosslinkable polyethylene-based composition useful for rotational molding and, when cured, beneficially characterized by exceptional percent elongation after long term exposure to degradation conditions, is provided. The composition advantageously includes a polyalkylene terephthalate as a polymeric additive.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: November 22, 1994
    Assignee: Wedtech, (USA) Inc.
    Inventor: Donald G. Needham