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Moisture-curing, hot-melt polyurethane adhesive compositions

  • US 5,266,606 A
  • Filed: 03/29/1993
  • Issued: 11/30/1993
  • Est. Priority Date: 05/19/1989
  • Status: Expired due to Fees
First Claim
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1. A moisture-curing, hot-melt, polyurethane adhesive composition comprising an isocyanate-terminated polyurethane prepolymer based on a polyester or a polyether and having a melting point of 40°

  • -60°

    C. or a phase transition point above room temperature, the polyurethane adhesive composition produced by a process comprising introducing an inert gas under pressure to the polyurethane composition in a molten state, and releasing the resulting polyurethane composition to ambient pressure to provide a foamed polyurethane composition, whereby the foamed composition has a cure rate at least about ten times the cure rate of the adhesive composition when not foamed.

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