Patents Assigned to Polyol International BV
  • Patent number: 4965029
    Abstract: A process for preparing a polyurethane foamed article including a hard foam encapsulated by a soft foam is provided. The process provides improved encapsulation over that described in EP 68820 by frothing the hard foam formulation, with for example carbon dioxide, before it is introduced onto the rising soft foam formulation. The hard foam formulation is frothed so that is density is between 75% and 145% of the soft foam formulation.
    Type: Grant
    Filed: January 22, 1988
    Date of Patent: October 23, 1990
    Assignee: Polyol International BV
    Inventors: Werner A. Lidy, Rudolf J. Tenhagen