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US 7,022,658 B2Granted
Azeotrope-like compositions containing hexafluoropropylene dimer and use thereof
Assignee3M Innovative Properties Company
InventorsDavid A. Hesselroth, John G. Owens
Life of this patent
Estimating the term…
Abstract
Azeotrope-like compositions comprising hexafluoropropylene dimer and a hydrocarbon or a hydrofluorocarbon, and uses thereof, are described.
Claims4
An azeotrope-like composition comprising:
- (a) hexafluoropropylene dimer;
- and
- (b) a hydrocarbon or a hydrofluorocarbon;
- wherein said composition is selected from the group consisting of:
- (i) compositions consisting essentially of about 2 to about 99 weight percent hexafluoropropylene dimer and about 1 to about 98 weight percent cyclopentane that boil below about 47° C. at about 760 torr;
- (ii) compositions consisting essentially of about 1 to about 90 weight percent hexafluoropropylene dimer and about 10 to about 99 weight percent isopentane that boil below about 27.5° C. at about 760 torr;
- and
- (iii) compositions consisting essentially of about 1 to about 90 weight percent hexafluoropropylene dimer and about 10 to about 99 weight percent 1,1,1,3,3-pentafluorobutane that boil below about 40° C. at about 760 torr.
5 more elements
An azeotrope composition consisting essentially of:
- (a) hexafluoropropylene dimer;
- and
- (b) a hydrocarbon or a hydrofluorocarbon;
- wherein said composition is selected from the group consisting of:
- (i) compositions consisting essentially of about 77.4 weight percent hexafluoropropylene dimer and about 22.6 weight percent cyclopentane that boil at about 32° C. at about 729 torr;
- (ii) compositions consisting essentially of about 67.5 weight percent hexafluoropropylene dimer and about 32.5 weight percent n-pentane that boil at about 27° C. at about 731 torr;
- (iii) compositions consisting essentially of about 58.6 weight percent hexafluoropropylene dimer and about 41.4 weight percent isopentane that boil at about 22° C. at about 735 torr;
- and
- (iv) compositions consisting essentially of about 54.4 weight percent hexafluoropropylene dimer and about 45.6 weight percent 1,1,1,3,3-pentafluorobutane that boil at about 34° C. at about 730 torr.
6 more elements
Dependencies are inferred from the claim text.