Aqueous alkaline polyamine paint stripping compositions
AssigneeEconomics Laboratory, Inc.
InventorsDennis F. Mahoney, William V. Block
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Abstract
Alkaline compositions useful to form aqueous paint stripping solutions are disclosed which comprise mixtures of an alkali metal hydroxide, a polyoxyalkylene polyamine accelerator and, optionally, a glycol or glycol ether accelerator.
Claims34
An alkaline paint remover composition having reduced toxicity and improved heat stability which comprises:
- an aqueous solution comprising about 2-40% of an alkali metal hydroxide and about 0.2-10% of a polyalkylene polyamine of the formula:
- (R.sub.1)(R.sub.2)NXN(R.sub.1)(R.sub.2)
- wherein R.sub.1 and R.sub.2 are selected from the group consisting of hydrogen, (lower)alkyl and [CH.sub.2 CH(Y)O].sub.m H, wherein Y is hydrogen or (lower)alkyl and m is about 1-4;
- and X is polyoxy(lower)alkylene.
A concentrate suitable for dilution with water to form an aqueous alkaline paint remover composition having reduced toxicity and improved heat stability which comprises a major amount of an alkali metal hydroxide and an effective accelerating amount of a polyalkylene polyamine of the formula:
- (R.sub.1)(R.sub.2)NXN(R.sub.1)(R.sub.2)
- wherein R.sub.1 and R.sub.2 are selected from the group consisting of hydrogen, (lower)alkyl and [CH.sub.2 CH(Y)O].sub.m H, wherein Y is hydrogen or (lower)alkyl and m is about 1-4;
- and X is polyoxy(lower)alkylene.
An alkaline paint remover composition having reduced toxicity and improved heat stability which comprises:
- an aqueous solution comprising about 2-40% of an alkali metal hydroxide, about 0.2-10% of a polyalkylene polyamine of the formula:
- (R.sub.1)(R.sub.2)NXN(R.sub.1)(R.sub.2)
- wherein R.sub.1 and R.sub.2 are selected from the group consisting of hydrogen, (lower)alkyl and [CH.sub.2 CH(Y)O].sub.m H, wherein Y is hydrogen or (lower)alkyl and m is about 1-4;
- and X is C.sub.2 -C.sub.6 alkylene;
- and
- an effective paint-removing amount of a (lower)alkylene glycol (lower)alkyl ether, a (lower)alkylene glycol phenyl ether, or mixtures thereof.
A concentrate suitable for dilution with water to form an aqueous alkaline paint remover composition having reduced toxicity and improved heat stability which comprises a major amount of an alkali metal hydroxide, an effective accelerating amount of a polyalkylene polyamine of the formula:
- (R.sub.1)(R.sub.2)NXN(R.sub.1)(R.sub.2)
- wherein R.sub.1 and R.sub.2 are selected from the group consisting of hydrogen, (lower)alkyl and [CH.sub.2 CH(Y)O].sub.m H, wherein Y is hydrogen or (lower)alkyl and m is about 1-4;
- and X is C.sub.2 -C.sub.6 alkylene;
- and
- an effective paint-removing amount of a glycol compound comprising a (lower)alkylene glycol (lower)alkyl ether, a (lower)alkylene glycol phenyl ether, or mixtures thereof.
Dependencies are inferred from the claim text.