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Urethanes made from aliphatic fluoro alcohols, isocyanates and carboxylic acids, a process for their preparation and their use

  • US 5,171,877 A
  • Filed: 12/26/1990
  • Issued: 12/15/1992
  • Est. Priority Date: 12/28/1989
  • Status: Expired due to Fees
First Claim
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1. A urethane of the formula ##STR28## wherein Rf is a perfluoroalkyl group having 6 to 18 carbon atoms,x is 1 to 4,y is 1 to 7,A is a triisocyanate radical of the formula ##STR29## X is --O-- or --NH--, z is 1 to 10, andM is a member selected from the group consisting of H, alkali metal ions, ammonium ion, and organoammonium ions.

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