Patent ID: 7022658

Claim:
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.