Method of cleaning using azeotrope-like compositions of 1,1-dich

Details Method of cleaning using azeotrope-like compositions of 1,1-dich Method of cleaning using azeotrope-like compositions of 1,1-dich

1990-03-07

1991-12-17

Morris, Theodore

Cleaning and liquid contact with solids

Processes

Oils, grease, tar, or wax removal, by dissolving

134 42, 252171, 252172, 252305, B08B 308, C11D 732, C11D 750

Patent

active

050732064

ABSTRACT:
A method of cleaning a solid surface is disclosed. The method involves spraying the solid surface with azeotrope-like compositions by using a propellant. The azeotrope-like compositions comprise from about 93.0 to about 98.0 weight percent 1,1-dichloro-1-fluoroethane, from about 7 to about 2 weight percent methanol, and from about 0.1 to about 0.01 weight percent nitromethane. Preferably, the propellant is selected from the group consisting of hydrocarbons, chlorofluorocarbons, hydrochlorofluorocarbon, hydrofluorocarbon, dimethyl ether, carbon dioxide, nitrogen, nitrous oxide, methylene oxide, air, and mixtures thereof.

REFERENCES:
patent: 3340199 (1967-09-01), Clay et al.
patent: 3607755 (1971-09-01), Murphy
patent: 4330422 (1982-05-01), Tesch
patent: 4816174 (1989-03-01), Lund et al.
patent: 4842764 (1989-06-01), Lund et al.

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