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US 2003/0158062 A1Published application
Compositions useful for removal of paint residues
OwnerNeil R. Wilsoninventor
Life of this patent
Estimating the term…
Abstract
Compositions containing an aromatic naptha fraction or blend having a flash point of at least about 100 degrees F., at least one alcohol having one to five carbon atoms, and at least one auxiliary solvent such as an ester or ketone are effective in removing paint residues from surfaces.
Claims19
A composition useful for removal of paint residues from a substrate surface consisting essentially of:
- (a) about 40 to about 90% by weight, based on the total weight of the composition, of an aromatic naphtha fraction or blend having a flash point of at least about 100 degrees F., (b) about 10 to about 30% by weight, based on the total weight of said composition, of one or more C1 to C5 alcohols having a flash point less than about 59 degrees F., and (c) about 1 to about 30% by weight, based on the total weight of said composition, of at least one auxiliary solvent, said composition having a flash point of at least about 60 degrees F. and a solvent resistivity of at least about 0.1 Mohms.
A composition useful for purging solvent borne paint residues which consists essentially of:
- (a) from about 50 to about 80% by weight, based on the total weight of the composition, of an aromatic naphtha fraction or blend having a flash point between about 100 and about 150 degrees F., (b) from about 10 to about 30% by weight, based on the total weight of the composition, of one or more C2 to C5 alcohols having a flash point between about 50 and about 59 degrees F., and (c) from about 10 to about 20% by weight, based on the total weight of the composition, of one or more auxiliary solvents selected from ketones, esters, and mixtures thereof, said composition having a flash point of at least 60 degrees F., a solvent resistivity of at least about 1.5 Mohms, and a substantially neutral pH.
A method of making a composition useful for removal of paint residues which comprises:
- (1) selecting an aromatic naphtha fraction or blend having a flash point above about 100 degrees F.;
- (2) selecting one or more C1 to C5 alcohols having a flash point between about 50 to about 59 degrees F.;
- (3) blending between about 40 to about 90% by weight, based on the total weight of the composition, of said aromatic naphtha fraction or blend, between about 10 to about 30% by weight, based on the total weight of the composition, of said one or more C1 to C5 alcohols, and between about 1 and about 30% by weight, based on the total weight of the composition, of one or more auxiliary solvents to obtain the composition, wherein said aromatic naptha fraction or blend, said one or more C1 to C5 alcohols, and said one or more auxiliary solvents and the relative proportions thereof are selected so as to impart to the composition a flash point of at least about 60 degrees F., a resistivity of about 0.15 Mohms or higher and a substantially neutral pH.
A composition useful for removal of paint residues which consists essentially of:
- (a) about 55 to about 65% by weight, based on the total weight of said composition, of an aromatic naphtha fraction or blend having a flash point between about 100 and about 150 degrees F., (b) about 22 to about 28% by weight, based on the total weight of said composition, of isopropyl alcohol, and (c) about 10 to about 20% by weight, based on the total weight of said composition, of n-butyl acetate, said composition having an overall flash point of at least about 60 degrees F., a resistivity of at least about 4 Mohms and a substantially neutral pH.
Dependencies are inferred from the claim text.