Method of activating N-methyl-2-pyrrolidone (NMP) varnish and paint remover solvents for removal of organic coatings
AssigneeISP Investments Inc.
InventorFrank Fusiak
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Abstract
This invention is directed to an environmentally safe, water soluble stripping composition comprising between about 30 and about 98.5 wt. % N-methylpyrrolidone or a 10/90 to 90/10 mixture of N-methylpyrrolidone and gamma-butyrolactone and between about 0.1 and about 5 wt. % cyclomethicone. The invention also concerns the use of this composition in a process for stripping organic coatings such as paints, resins, varnishes and shellac from substrates.
Claims12
A stripping composition for removal of paints, varnish, shellac, enamel, polyurethanes coatings and inks from a substrate which consists essentially of (a) between 60 and about 98.5 wet. % of a component selected from the group consisting of N-methylpyrrolidone and a 90/10 to about 37/57 weight ratio mixture of N-methylpyrrolidone and gamma-butyrolactone and (b) between about 0.5 and about 5 wt. % cyclomethicone having the formula ##STR3## wherein n has a value of from 3 to 6.
The process of removing a paint, varnish, shellac, enamel, polyurethane or ink coating from a substrate which comprises applying the composition of any one of claims 1 through 10 or 13 to said substrate in an amount sufficient to solubilize and separate said coating from said substrate.
Dependencies are inferred from the claim text.