| 摘要 |
PURPOSE:To obtain the subject composition usable as substituting material of fluorinated hydrocarbon and having excellent properties as solvent, etc., with satisfying excellent.properties of conventional fluorinated hydrocarbon, comprising at least two species of R225ca, R225cb and R244ca and trifluoroethanol. CONSTITUTION:Respectively 5-99wt.% at least two species of (A) 1,1- dichloro-2,2,3,3,3-pentafluoropropane (R225ca), (B) 1,3-dichloro-1,2,2,3,3- pentafluoropropane (R225cb) and (C) 1-chloro-2,2,3,3,-tetrafluoropropane (R244ca) are mixed with (D) 1-40wt.% 2,2,2-trifluoroethanol to afford the aimed composition. Preferable mixing ratio is respectively 35-45wt.% of two species selected from A-C and 10-30wt.% D, or respectively 25-30wt.% of A and B, 20-30wt.% C and 10-30wt.% D. Said composition is able to be used in the same manner as conventional fluorinated hydrocarbon without necessity of steep amendment of conventional technique. |
