Nonflammable organic solvent compositions
AssigneePPG Industries, Inc.
InventorsEarl M. Gorton, Tommy G. Taylor, Ronald D. Olinger
Life of this patent
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Abstract
Describes nonflammable organic solvent compositions comprising 1,2-dichloroethylene and a halocarbon different than 1,2-dichloroethylene. The 1,2-dichloroethylene consists essentially of trans-1,2-dichloroethylene, cis-1,2-dichloroethylene and mixtures thereof; preferably a major amount of trans-1,2-dichloroethylene; and in particular at least 99% by weight of trans-1,2-dichloroethylene, based on the total weight of 1,2-dichloroethylene. The halocarbon is selected from the group consisting of 1,1,1,3,3,3-hexafluoroisopropanol, perfluoro-tert-butyl alcohol, 1,1,2,3,3-pentafluoropropane, 1-bromo-2-chloro-1,1,2-trifluoroethane, 1,2-dichloro-1,1,2,3,3,3-hexafluoropropane and mixtures thereof.
Claims18
An organic solvent composition comprising:
- (a) from 30% to 75% by weight of 1,2-dichloroethylene;
- and
- (b) from 25% to 70% y weight of a halocarbon selected from the group consisting of 1,1,1,3,3,3-hexafluoroisopropanol, perfluoro-tert-butyl alcohol, 1,1,2,3,3-pentafluoropropane, 1-bromo-2-chloro-1,1,2-trifluoroethane, 1,2-dichloro-1,1,2,3,3,3-hexafluoropropane and mixtures thereof, said halocarbon being present in amounts sufficient to render nonflammable a homogenous mixture of 1,2-dichloroethylene and said halocarbon.
A method of cleaning a surface of an article comprising applying to said surface a nonflammable homogenous organic solvent composition comprising:
- (a) from 30% to 75% by weight of 1,2-dichloroethylene;
- and
- (b) from 25% to 70% by weight of a halocarbon selected from the group consisting of 1,1,1,3,3,3-hexafluoroisopropanol, perfluoro-tert-butyl alcohol, 1,1,2,3,3-pentafluoropropane, 1-bromo-2-chloro-1,1,2-trifluoroethane, 1,2-dichloro-1,1,2,3,3,3-hexafluoropropane and mixtures thereof, and removing subsequently said solvent composition from said surface.
Dependencies are inferred from the claim text.