Ether-containing paint removing composition
A composition and related process for removing paint from a substrate in which the composition contains an aprotic polar solvent, an ether-containing compound, an evaporation retarder and a solvent for the evaporation retarder.
1 . A composition for removing paint from a substrate, wherein the composition comprises:
A. from about 1.0 to about 50.0 weight percent of at least one aprotic polar solvent;
B. from about 1.0 to about 70.0 weight percent of at least one ether-containing compound;
C. from about 0.25 to about 5.0 weight percent of at least one evaporation retarder; and
D. from about 1.0 to about 50.0 weight percent of at least one solvent for the evaporation retarder;
wherein the composition is free of methylene chloride.
2 . A composition as defined by claim 1 wherein the aprotic polar solvent is methyl acetate; t-butyl acetate; N-methyl-2-pyrrolidone; acetone; dimethyl sulfoxide; a dibasic ester; or a mixture thereof.
3 . A composition as defined by claim 2 wherein the aprotic polar solvent is acetone, N-methyl-2-pyrrolidone or a dibasic ester.
4 . A composition as defined by claim 1 wherein the ether-containing compound is 1,3-dioxolane; 1,3,5-trioxolane; methylal or a mixture thereof.
5 . A composition as defined by claim 4 wherein the ether-containing compound is 1,3-dioxolane.
6 . A composition as defined by claim 1 wherein the evaporation retarder is a wax compound.
7 . A composition as defined by claim 6 wherein the evaporation retarder is paraffin wax.
8 . A composition as defined by claim 1 wherein the solvent for the evaporation retarder is an aliphatic or aromatic hydrocarbon solvent.
9 . A composition as defined by claim 8 wherein the solvent for the evaporation retarder is toluene, xylene, aromatic 100 solvent, mineral spirits, mineral oil or a mixture thereof.
10 . A composition for removing paint from a substrate, wherein the composition comprises:
A. from about 1.0 to about 50.0 weight percent of at least one aprotic polar solvent;
B. from about 1.0 to about 70.0 weight percent of at least one ether-containing compound;
C. from about 0.25 to about 5.0 weight percent of at least one evaporation retarder;
D. from about 1.0 to about 50.0 weight percent of at least one solvent for the evaporation retarder; and
E. from about 0.1 to about 10.0 weight percent of at least one thickening agent;
wherein the composition is free of methylene chloride.
11 . A composition for removing paint from a substrate, wherein the composition comprises:
A. from about 1.0 to about 50.0 weight percent of at least one aprotic polar solvent;
B. from about 1.0 to about 70.0 weight percent of at least one ether-containing compound;
C. from about 0.25 to about 5.0 weight percent of at least one evaporation retarder;
D. from about 1.0 to about 50.0 weight percent of at least one solvent for the evaporation retarder; and
E. from about 0.1 to about 10.0 percent of at least one alkaline activating agent;
wherein the composition is free of methylene chloride.
12 . A process for removing paint from a substrate, wherein the process comprises treating the substrate with a composition which comprises:
A. from about 1.0 to about 50.0 percent weight of at least one aprotic polar solvent;
B. from about 1.0 to about 70.0 percent weight of at least one ether-containing compound;
C. from about 0.25 to about 5.0 weight percent of at least one evaporation retarder; and
D. from about 1.0 to about 50.0 weight percent of at least one solvent for the evaporation retarder;
wherein the composition is free of methylene chloride.
13 . A process for removing paint from a substrate, wherein the process comprises treating the substrate with a composition which comprises:
A. from about 1.0 to about 50.0 weight percent of at least one aprotic polar solvent;
B. from about 1.0 to about 70.0 weight percent of at least one ether-containing compound;
C. from about 0.25 to about 5.0 weight percent of at least one evaporation retarder;
D. from about 1.0 to about 50.0 weight percent of at least one solvent for the evaporation retarder; and
E. from about 0.1 to about 10.0 percent of at least one alkaline activating agent;
wherein the composition is free of methylene chloride.
14 . A process as defined by claim 13 wherein the substrate is an automotive part having a 2-part urethane finish.