Patents Assigned to Rapra Technology Limited
  • Temperature activated catalysts for liquid polymer cures
    Patent number: 4954472
    Abstract: A temperature-activated catalyst for polyurethane or liquid polymer cures comprising the catalyst supported on, e.g. mounted on or bound into, a polymer which is incompatible with, viz. insoluble in, the reacting polymer phase.The catalyst may contain organotin groupings and the polymer may be mobile or rubber and have a linear polymer backbone, e.g. styrene-allyl alcohol.The polymer may be glassy and be ground to a fine powder.
    Type: Grant
    Filed: December 9, 1988
    Date of Patent: September 4, 1990
    Assignee: Rapra Technology Limited
    Inventors: Keith W. Scott, Bryan G. Willoughby