Patent ID: 6905630
Filing Date: 2005-06-14
Classification: A62D,C08J,C09K,C23G

Abstract:
1. An azeotropic or azeotrope-like composition consisting essentially of effective amounts of HFC-152a (CHF 2 CH 3 ) and a hydrofluoroether selected from the group consisting of HFE-125E (CF 3 OCH F 2 ), HFE-143aE (CH 3 OCF 3 ), HFE-227caEβγ (CHF 2 OCF 2 CF 3 ), and HFE-227eaE (CF 3 OCFHCF 3 ), to form said azeotropic or azeotrope-like composition, and wherein after 50 weight percent of said composition has evaporated, the difference in vapor pressure between composition and the remaining composition is less than 10 percent.