Patent ID: 6268323
Filing Date: 2001-07-31
Classification: C09D,C11D,G03F

Abstract:
A non-corrosive stripping and cleaning composition, which is free of hydroxylamine and its derivatives, comprising:(a) about 5% to 50% by weight of a solvent selected from the group consisting of: N-methyl-2-pyrrolidinone, N-hydroxyethyl-2-pyrrolidinone, 1,3-dimethyl-2-imidazolidinone, dimethylsulfoxide, N,N-dimethylacetamide, sulfolane, diacetone alcohol, ethylene glycol, propylene glycol and admixtures thereof;(b) about 10% to 90% by weight of an alkanolamine selected from the group consisting of: diethyleneglycolamine, monoethanolamine, diethanolamine, triethanolamine, 2-(2-aminoethylamino) ethanol, and admixtures thereof;(c) about 0.1% to 10% by weight of a carboxylic acid corrosion inhibitor selected from the group consisting of: formic acid, acetic acid, propionic acid, valeric acid, isovaleric acid, oxalic acid, malonic acid, succinic acid, glutaric acid, maleic acid, furmaric acid, phthalic acid, 1,2,3-benzene-tricarboxylic acid, glycolic acid, lactic acid, citric acid, salicylic acid, tartaric acid, gluconic acid, and combinations thereof; and(d) about 1% to 40% by weight of water.