| 摘要 |
NEW MATERIAL:The compound of formula I [Rf<1> is 5-11C perfluoroalkyl; Rf<2> is F or CF3; Rf<3> is (CF3-substituted) 4-5C perfluoroalkylene, CF2CF2OCF2CF2 or CF2CF2N(CF3)CF2CF2; when C number of Rf<1> is 9-11 and Rf<2> is F, Rf<3> is CF3-containing 4-5C perfluoroalkylene or CF2CF2N(CF3)CF2CF2]. EXAMPLE:The compound of formula II. USE:It has excellent thermal stability, dielectric strength and low-temperature fluidity and low surface energy, etc., and is useful as artificial blood, inspection liquid for integrated circuit, thermal medium for vapor soldering, solvent, etc. PREPARATION:The compound of formula I can be produced by electrolytic fluorination of a compound of formula III (Rf<4> is 3-9C perfluoroalkyl; R<1> is -CF2CH2, etc.; R<2> is H, etc.; R<3> is 4-5C alkylene, etc.). |
