| 摘要 |
To replace cleaning compositions based on 1,1,2-trichloro-1,2,2-trifluoroethane (F113), the invention proposes a composition comprising, by weight, 70 to 80% of 1,1-dichloro-2,2,2-trifluoroethane (F123) and 30 to 20% of methyl formate. These two compounds form a negative azeotrope (B.p. = 33.3 DEG C at normal pressure). The composition, optionally stabilised, can be used for cleaning solid surfaces, in particular for defluxing printed circuits and for degreasing mechanical components.
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