NON-AQUEOUS SOLVENT COMPOSITION AND ITS USE AS BARRIER LIQUID

摘要

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.

主权项

1. A method of operating a coating installation of an industrial mass production coating line, wherein the method comprises:
providing the coating installation comprising a release valve for a non-aqueous hardener component; and filling the coating installation downstream of the non-aqueous hardener release valve with 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, and oxygen and, optionally, nitrogen, and0 to 10 wt. % of at least one additive.