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US 5,126,067 AGranted
Azeotrope-like compositions of 1,1-dichloro-1-fluoroethane, 1,2-dichloroethylene and optionally an alkanol
AssigneeAllied-Signal Inc.
InventorsEllen L. Swan, Rajat S. Basu, Richard M. Hollister
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Abstract
Stable azeotrope-like compositions comprising 1,1-dichloro-1-fluoroethane, dichloroethylene, and optionally an alkanol which are useful in a variety of industrial cleaning applications including defluxing and some of which are also useful as blowing agents in the preparation of polyurethane foams.
Claims38
Azeotrope-like compositions consisting essentially of from about 93.5 to about 99.95 weight percent 1,1-dichloro-1-fluoroethane and from about 0.05 to about 6.5 weight percent trans-1,2-dichloroethylene which boils at about 32.2.degree. C. at 760 mm Hg;
- or from about 93 to about 99.95 weight percent 1,1-dichloro-1-fluoroethane and from about 0.05 to about 7 weight percent of a mixture consisting of trans-1,2-dichloroethylene and cis-1,2-dichloroethylene wherein said cis-1,2-dichloroethylene is present in an amount from about 5 to about 30 weight percent of said mixture and which boil at about 32.2.degree. C. at 760 mm Hg;
- or from about 88.2 to about 96.95 weight percent 1,1 -dichloro-1-fluoroethane, from about 0.05 to about 7.9 weight percent trans-1,2-dichloroethylene and from about 3 to about 3.9 weight percent methanol which boil at about 29.7.degree. C. at 760 mm Hg;
- or from about 87.6 to about 96.95 weight percent 1,1-dichloro-1-fluoroethane, from about 0.05 to about 8.5 weight percent of a mixture consisting of trans-1,2-dichloroethylene and cis-1,2-dichloroethylene wherein said cis-1,2-dichloroethylene is present in an amount from about 5 to about 30 weight percent of said mixture and from about 3 to about 3.9 weight percent methanol which boil at about 29.7.degree. C. at 760 mm Hg;
- or from about 91 to about 99 weight percent 1,1-dichloro-1-fluoroethane, from about 0.05 to about 7 weight percent trans-1,2-dichloroethylene and from about 1 to about 2 weight percent ethanol which boil at about 31.8.degree. C. at 760 mm Hg;
- or from about 90.5.degree. to about 98.45 weight percent 1,1-dichloro-1-fluoroethane, from about 0.05 to about 5.5 weight percent of a mixture consisting of trans-1,2-dichloroethylene and cis-1,2-dichloroethylene wherein said cis-1,2-dichloroethylene is present in an amount from about 5 to about 30 weight percent of said mixture which boil at about 31.8.degree. C. at 760 mm Hg.
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Dependencies are inferred from the claim text.