Non-aqueous solvent composition and its use as barrier liquid

Abstract

A non-aqueous solvent composition comprising 0 to 10 wt. % of N-alkyl pyrrolidone, 0 to 5 wt. % of dimethyl sulfoxide, 10 to 50 wt. % of γ-butyrolactone, 10 to 50 wt. % of at least one monoalcohol, 10 to 60 wt. % of at least one organic solvent inert towards isocyanate groups, other than γ-butyrolactone, other than N-alkyl pyrrolidone, and consisting of carbon, hydrogen, oxygen and, optionally, nitrogen, and 0 to 10 wt. % of at least one additive. The non-aqueous solvent composition can be used as barrier liquid within a coating installation of an industrial mass production coating line for the application of water-borne two-component polyurethane coatings.

1 . A non-aqueous solvent composition comprising:
 0 to 10 wt. % of N-alkyl pyrrolidone,   0 to 5 wt. % of dimethyl sulfoxide,   10 to 50 wt. % of γ-butyrolactone,   10 to 50 wt. % of at least one monoalcohol,   10 to 60 wt. % of at least one organic solvent inert towards isocyanate groups, other than γ-butyrolactone, other than N-alkyl pyrrolidone, and consisting of carbon, hydrogen, oxygen and, optionally, nitrogen, and   0 to 10 wt. % of at least one additive.   
     
     
         2 .- 10 . (canceled)