×

Polyurethane foam composite

  • US 3,966,521 A
  • Filed: 06/16/1975
  • Issued: 06/29/1976
  • Est. Priority Date: 10/10/1974
  • Status: Expired due to Term
First Claim
Patent Images

1. In a process for the production of a laminated composite which comprises heat sealing a substrate to a polyurethane foam prepared by the reaction of an organic polyisocyanate with a polyol in the presence of a blowing agent the improvement which comprises employing as the polyol a graft polyol prepared by the in situ polymerization in the presence of a free radical catalyst of an ethylenically unsaturated monomer or mixture of monomers in a polyol.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×