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Water-reduced urethane coating compositions

  • US 4,046,729 A
  • Filed: 06/02/1975
  • Issued: 09/06/1977
  • Est. Priority Date: 06/02/1975
  • Status: Expired due to Term
First Claim
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1. A stable aqueous dispersion which is emulsifiable in the absence of added emulsifier of a non-gelled polyurethane formed by reacting in the presence of water:

  • A. a partially reacted NCO-containing polymer containing salt groups and highly active hydrogens selected from the group consisting of hydroxyl, thiol, primary and secondary amine, said partially reacted NCO-containing polymer having a reactive hydrogen equivalent weight of 150 to 10,000,B. an active hydrogen-containing compound having at least one hydrogen more reactive with NCO groups than water to form a polyurethane having an intrinsic viscosity of less than 4.0 deciliters per gram.

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