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Solvent for urethane adhesives and coatings and method of use

United States Patent

7,767,637
August 3, 2010
View the Complete Patent at the US Patent & Trademark Office
Y-12 National Security Complex - Visit the Technology Transfer Website
A solvent for urethane adhesives and coatings, the solvent having a carbaldehyde and a cyclic amide as constituents. In some embodiments the solvent consists only of miscible constituents. In some embodiments the carbaldehyde is benzaldehyde and in some embodiments the cyclic amide is N-methylpyrrolidone (M-pyrole). An extender may be added to the solvent. In some embodiments the extender is miscible with the other ingredients, and in some embodiments the extender is non-aqueous. For example, the extender may include isopropanol, ethanol, tetrahydro furfuryl alcohol, benzyl alcohol, Gamma-butyrolactone or a caprolactone. In some embodiments a carbaldehyde and a cyclic amide are heated and used to separate a urethane bonded to a component.
Simandl; Ronald F. (Knoxville, TN), Brown; John D. (Harriman, TN), Holt; Jerrid S. (Knoxville, TN)
Babcock & Wilcox Technical Services Y-12, LLC (Oak Ridge, TN)
11/ 749,234
20080283097
May 16, 2007
GOVERNMENT RIGHTS The U.S. Government has rights to this invention pursuant to contract number DE-AC05-00OR22800 between the U.S. Department of Energy and BWXT Y-12, L.L.C.