Azeotrope-like compositions and their use

摘要

The invention provides azeotrope-like compositions consisting essentially of R f OCH 3 , where R f is a branched or straight chain perfluoroalkyl group having 4 carbon atoms, and one or more organic solvent(s) selected from the group consisting of: straight chain, branched chain and cyclic alkanes containing 6 to 8 carbon atoms; cyclic and acyclic ethers containing 4 to 6 carbon atoms; ketones having 3 carbon atoms; chlorinated alkanes containing 1, 3 or 4 carbon atoms; chlorinated alkenes containing 2 carbon atoms, alcohols containing 1 to 4 carbon atoms, partially fluorinated alcohols containing 2 to 3 carbon atoms, 1-bromopropane, acetonitrile, HCFC 225ca(1,1-dichloro-2,2,3,3,3 pentafluoropropane and HCFC-225cb(1,3-dichloro-1,1,2,2,3-pentaflouropropane).