Azeotrope-like compositions of 1,1,2-trichloro-1,2,2-trifluoroethane, methanol, nitromethane, 1,2-dichloroethylene and 1-chloropropane
AssigneeAllied-Signal Inc.
InventorsEllen L. Swan, Rajat S. Basu, David P. Wilson, Earl A. E. Lund
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Abstract
Azeotrope-like compositions comprising 1,1,2-trichloro-1,2,2-trifluoroethane, methanol, nitromethane, 1,2-dichloroethylene and 1-chloropropane are stable and have utility as degreasing agents and as solvents in a variety of industrial cleaning applications including the defluxing of printed circuit boards.
Claims21
Azeotrope-like compositions consisting essentially of from about 51.9 to about 62.8 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane, from about 5.7 to about 6.2 weight percent methanol, from about 0.05 to about 0.3 weight percent nitromethane, from about 16.3 to about 24.3 weight percent trans-1,2-dichloroethylene and from about 10.0 to about 19.5 weight percent 1-chloropropane.
Azeotrope-like compositions consisting essentially of from about 70.4 to about 72.0 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane, from about 5.8 to about 6.3 weight percent methanol, from about 0.03 to about 0.5 weight percent nitromethane, from about 2.0 to about 0.4 weight percent cis-1,2-dichloroethylene and 20.0 to about 22.0 weight percent 1-chloropropane.
Azeotrope-like compositions consisting essentially of from about 51.9 to about 65.5 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane, from about 5.7 to about 6.3 weight percent methanol, from about 0.02 to about 0.5 weight percent nitromethane, from about 16.3 to about 24.3 weight percent trans-1,2-dichloroethylene, from about 2.0 to about 0.4 weight percent cis-1,2-dichloroethylene and from about 10.0 to about 22.0 weight percent 1-chloropropane.
Azeotrope-like compositions consisting essentially of 1,1,2-trichloro-1,2,2-trifluoroethane, methanol, nitromethane, at least about 16.3 weight percent trans-1,2-dichloroethylene and at least about 10.0 weight percent 1-chloropropane which boil at about 38.degree. C..+-.1.degree. C. at 760 mm Hg.
Azeotrope-like compositions consisting essentially of 1,1,2-trichloro-1,2,2-trifluoroethane, methanol, nitromethane, at least about 0.4 weight percent cis-1,2-dichloroethylene and at least about 20.0 weight percent 1-chloropropane which boil at about 38.5.degree. C..+-.1.degree. C. at 760 mm Hg.
Azeotrope-like compositions consisting essentially of 1,1,2-trichloro-1,2,2-trifluoroethane, methanol, nitromethane, at least about 10 weight percent 1-chloropropane and a mixture of at least about 16.3 weight percent trans-1,2-dichloroethylene and at least about 0.4 weight percent cis-1,2-dichloroethylene which boil at about 39.2.degree. C..+-.1.degree. C. at 760 mm Hg.
Dependencies are inferred from the claim text.