Abstract An aqueous alkaline stripping solution which contains an accelerator composition comprised of tripropylene glycol and an organic nitrogen compound of the formula: WHEREIN R1, R2 and R3 are independently selected from the group consisting of hydrogen, alkanol and hydroxy ether groups, which latter groups contain from about two to 10 carbon atoms, at least one of R1, R2 and R3 being other than hydrogen, the compound having a boiling point of at least about 100* C and a molecular weight which is not substantially in excess of about 500. The preferred alkaline stripping solution is an aqueous sodium hydroxide solution and the preferred components of the activator composition are tripropylene glycol and triethanolamine.
The composition as claimed in claim 1 wherein the tripropylene glycol and the organic nitrogen compound are present in the accelerator composition in the weight ratio of from about 0.5 to 3:1.
Claim 2
Dependent Claim
14 words
The composition as claimed in claim 2 wherein the organic nitrogen compound is triethanolamine.
Claim 3
Dependent Claim
44 words
An aqueous composition for removing organic coatings which comprises an aqueous solution of the concentrate composition as claimed in claim 1, which concentrate composition is present in an amount within the range of about 0.5 to 5 pounds per gallon of the aqueous composition.
Claim 4
Dependent Claim
40 words
The aqueous composition as claimed in claim 4 wherein the organic nitrogen compound is triethanolamine, and the weight ratio of the tripropylene glycol and organic nitrogen compound in the accelerator composition is within the range of about 0.5 to 3:1.
Claim 5
Dependent Claim
59 words
A method of removing organic coatings from a substrate which comprises contacting the substrate from which the coating is to be removed with the aqueous coating removing composition as claimed in claim 4 and maintaining the aqueous composition in contact with the surface for a period sufficient to effect a substantial loosening of the organic coating on the surface.
Claim 6
Dependent Claim
58 words
A method for removing organic coatings from a substrate which comprises contacting the substrate from which the coating is to be removed with the aqueous coating removing composition as claimed in claim 5 and maintaining the aqueous composition in contact with the substrate for a period sufficient to effect a substantial loosening of the coating on the substrate.