Patent ID: 6361713
Filing Date: 2002-03-26
Classification: A61K,A62D,B01D,B23K,C07C,C07D,C08J,C11D

Abstract:
A method of displacing water from a surface which comprises contacting the surface with a liquid composition comprising a normally liquid omega-hydrofluoroalkyl ether compound represented by the general formula:Xâ€”Rfâ€”Oâ€”(Rfâ€²â€”O)nâ€”Rfâ€³â€”H wherein:H is a primary hydrogen atom; X is a fluorine atom, a primary hydrogen atom, or a primary chlorine atom; n is an integer of 0 to 7; and Rf, Rfâ€², and Rfâ€³ are independently selected from the group consisting of linear or branched, unsubstituted perfluoroalkylene groups; linear or branched, perfluoroalkyl- or perfluorocycloalkyl-substituted perfluoroalkylene groups; and linear or branched perfluoroalkylene groups substituted with an ether oxygen-containing moiety; with the proviso that when X is H or Cl, Rf has 1 to 18 chain carbon atoms and each of Rfâ€² and Rfâ€³ independently has 1 to 12 chain carbon atoms; and with the further proviso that when X is F, then Rf has at least 4 chain carbon atoms, and each of Rfâ€² and Rfâ€³ independently has 1 or more chain carbon atoms; and with the still further proviso that when n is zero, then Rf is a perfluorocycloalkyl-substituted perfluoroalkylene group.