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1. (WO1991009091) AZEOTROPE-LIKE COMPOSITIONS OF 1,2-DIFLUOROETHANE AND DICHLOROTRIFLUOROETHANE
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-24-What is claimed is:

1. Azeotrope-like compositions comprising dichlorotrifluoroethane and 1, 2-difluoroethane which boil at about 26.3°C ± about 2°C at 760 mm Hg .

2. Azeotrope-like compositions consisting essentially of from about 50 to about 95 weight percent 1, l-dichloro-2, 2, 2-trifluoroethane and from about 5 to about 50 weight percent 1,2-difluoroethane and boil at about 26.1°C at 760 mm Hg .

3. The azeotrope-like compositions of claim 2 wherein said compositions consist essentially of from about 70 to about 90 weight percent 1, 1-dichloro-2,2 , 2-trifluoroethane and from about 10.0 to about 30.0 weight percent 1,2-difluoroethane and boil at about 26.1°C at 760 mm Hg.

4. The azeotrope-like compositions of claim 2 wherein said compositions consist essentially of from about 78 weight percent 1, l-dichloro-2, 2, 2-trifluoroethane and about 22 weight percent 1,2-difluoroethane and boil at about 26.1°C at 760 mm Hg.

5. Azeotrope-like compositions consisting essentially of from about 50 to about 80 weight percent 1,2-dichloro-l, 1,2-trifluoroethane and from about 20 to about 50.0 weight percent 1,2-difluoroethane and boil at about 27.2°C at 760 mm Hg.

6. The azeotrope-like compositions of claim 5 wherein said compositions consist essentially of from about 60 to about 80.0 weight percent 1,2-dichloro-1, 1,2-trifluoroethane and from about 20.0 to about 40.0 weight percent 1,2-difluoroethane and boil at about 27.2°C at 760 mm Hg.

7. The azeotrope-like compositions of claim 5 wherein said compositions consist essentially of from about 68 weight percent 1,2-dichloro-l, 1, 2-trifluoro-ethane and about 32 weight percent 1,2-difluoroethane and boil at about 27.2°C at 760 mm Hg .

8. Azeotrope-like compositions consisting essentially of a mixture of 1, l-dichloro-2, 2-2-trifluoroethane and 1,2-dichloro-l, 1,2-trifluoroethane with 1,2-difluoroethane which boil at about 25.4°C ± ab.out 0.8°C at 760 mm Hg.

9. The azeotrope-like compositions of claim 8 wherein said compositions consist essentially of from from about 50 to about 95 weight percent of a mixture of l,l-dichloro-2,2,2-trifluoroethane and 1,2-dichloro-1, 1,2-trifluoroethane and from about 5 to about 50 weight percent 1,2-difluoroethane and boil at about 25.4°C at 760 mm Hg .

10. The azeotrope-like compositions of claim 8 wherein said compositions consist essentially of from about 70 to about 90 weight percent of a mixture of l,l-dichloro-2,2,2-trifluoroethane and 1,2-dichloro- 1, 1,2-trifluoroethane and from about 10 to about 30 weight percent 1,2-difluoroethane and boil at about

25.4°C at 760 mm Hg.

11. A method for producing cooling comprising condensing the refrigerant composition of claim 1 and thereafter evaporating said composition in the vicinity of a body to be cooled.

12. A method for producing heating comprising condensing the refrigerant composition of claim 1 in the vicinity of a body to be heated and thereafter evaporating said composition.

13. A method for preparing polyurethane and polyisocyanurate foams comprising reacting and foaming a mixture of ingredients which will react to form the c polyurethane and polyisocyanurate foams in the presence of a blowing agent composition of claim 1.

14. A method of cleaning a solid surface comprising treating said surface with an azeotrope-like

jQ composition of claim 1.

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