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Moisture-curing, polyurethane hot-melt compositions

  • US 5,173,538 A
  • Filed: 10/17/1989
  • Issued: 12/22/1992
  • Est. Priority Date: 11/15/1988
  • Status: Expired due to Term
First Claim
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1. A hot-melt polyurethane composition, comprising:

  • a mixture comprising a first polymer and second polymer, wherein the first polymer is a polyether-based polyurethane prepolymer having a glass transition point above room temperature, and which is prepared from an isocyanate and a polyether, the polyether polyol having a molecular weight between about 250 and 800, the mole ratio of the isocyanate groups to the hydroxyl groups of the isocyanate and the polyether polyol being from about 1.1 to 2.5, and wherein the second polymer is a polyurethane or polyurethane prepolymer and has a glass transition point below room temperature.

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