Patent ID: 7772174

Claim:
A non-aqueous solution composition for removing a polymer material from a substrate, wherein the composition includes approximately 30 to 40 wt % of a polyol compound selected from among 1,3-propanediol, 2-methyl-1,3-propanediol, butanediol, and glycerol; approximately 25 to 65 wt % of a glycol ether solvent selected from among ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, propylene glycol monomethyl ether, propylene glycol dimethyl ether, propylene glycol mono-N-butyl ether, dipropylene glycol monomethyl ether, dipropylene glycol dimethyl ether, and dipropylene glycol mono-N-butyl ether; approximately 25 to 65 wt % of N-methyl-2-pyrrolidone; approximately 0 to 10 wt % of one or more types of amine compound selected from the group composed of ethylenediamine, diethylenetriamine, triethylenetetramine, propylenediamine, aminoethyl aminoethanol, ethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, and 3-amino-1-propanol; approximately 0 to 10 wt % of a nonionic surfactant; and approximately 0.2 to 5 wt % of a corrosion inhibitor selected from among catechols, (C 1 -C 6 ) alkyl catechols, benzotriazoles, and (C 1 -C 10 ) alkyl benzotriazoles; and is substantially water-free.