Patent ID: 7468142
Filing Date: 2008-12-23
Classification: C08G,C08J,C08L,C09D,C09K,C11D,C23G

Abstract:
1. A composition comprising 1,1,1,3,3-pentafluorobutane and a perfluoropolyether of the formula (I), wherein a and b independently denote integers greater than 0, and said perfluoropolyether has a boiling point of about 57° C. at 101.3 kPa and an average molecular mass of about 340, in proportions for which they form an azeotrope or a pseudo-azeotrope, the said azeotrope or pseudo-azeotrope consisting of about 52% by weight to about 83% by weight of 1,1,1,3,3-pentafluorobutane and about 17% by weight to about 48% by weight of said perfluoropolyether of the formula (I) at a pressure of 100.1 kPa.