Low Hazardous Air Pollutants blends of naphtha and alcohol useful for removal of paint residues
OwnerNeil R. Wilsoninventor
Life of this patent
Estimating the term…
Abstract
A blend containing about 60 weight percent of aromatic naphtha blends having a TCC flash point of about 100 degrees F, about 25 weight percent of Isopropyl alcohol, and about 15 weight percent of n-butyl acetate as an auxiliary solvents is a low Hazardous Air Pollutants mixture( about 2.7% by weight) with an overall TCC flash point of about 60 degrees F. and an electrical resistivity about 5 Mohms. This blend is low cost and more effective in solvent borne paint residue removal measured by conventional Behr Purge tests than comparative blends.
Claims17
A low Hazardous Air Pollutants composition useful for removal of paint residues from pipes and vessels which composition consists essentially of:
- (1) An aromatic naphtha fraction or blend having a TCC flash point about 100 degrees F. or higher and present from about 40 to about 90% by weight of the total composition, (2) one or more C1 to C5 alcohols having a flash point less than about 59 degrees F. and present from about 10 to about 30% by weight of the total composition, and (3) auxiliary solvent present from about 1 to about 30% by weight of the total composition, said composition having an overall flash point of 60 degrees F. or higher and a solvent resistivity of about 0.1 Mohms or higher.
A low Hazardous Air Pollutants composition useful for purging of solvent borne paint residues which consists essentially of:
- (1) An aromatic naphtha fraction or blend having a TCC flash point between about 100 and about 150 degrees F. and present from about 50 to about 80% by weight of the total composition, (2) one or more C2 to C5 alcohols having a flash point between about 50 and about 59 degrees F. and present from about 10 to about 30% by weight of the total composition, and (3) auxiliary solvent present from about 5 to about 15% by weight of the total composition, said composition having an overall flash point of 60 degrees F. or higher, a solvent resistivity of about Mohms or higher and a substantially neutral pH.
A method of making a low Hazardous Air Pollutants composition useful for removal of solvent borne 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 of the total composition of said naphtha and between about 10 to about 30% by weight of the total composition of said alcohol and between about 1 and about 30% by weight of the total composition of auxiliary solvents to prepare a composition having a flash point of 60 degrees F. or higher, a resistivity of about 0.15 Mohms or higher and a substantially neutral pH.
A low Hazardous Air Pollutants composition useful for removal of paint residues from pipes and vessels which composition consists essentially of:
- (1) An aromatic naptha fraction or blend having a TCC flash point between about 100 and about 150 degrees F. and present from about 55 to about 65% by weight of the total composition, (2) isopropyl alcohol having a flash point less than about 59 degrees F. and present from about 15 and about 25% by weight of the total composition, and (3) n-butyl acetate present from about 1 to about 30 % by weight of the total composition, said composition having an overall flash point of 60 degrees F. or higher a solvent resistivity of about 4 Mohms or higher and a substantially neutral pH.
Dependencies are inferred from the claim text.