Compositions for dewetting or degreasing solid surfaces

Dewetting or degreasing composition consisting essentially of a solution of surface-active material in at least one halogenated aliphatic solvent which is liquid at room temperature and which has a boiling point not exceeding 87.degree. C., characterized in that surface-active material comprises:

• a) at least one compound of formula:
• ##STR3## in which p is a number ranging from 1 to 2, R denotes a linear or branched alkyl radical containing from 1 to 18 carbon atoms, R.sub.1 and R.sub.2, which are identical or different, each represent a hydrogen atom or an alkyl or hydroxyalkyl radical containing 1 to 4 carbon atoms, R.sub.F represents a linear or branched perfluoroalkyl radical containing from 2 to 20 carbon atoms and X denotes an optionally partially halogenated, divalently-bonded group,
• b) at least one compound of formula:
• (RO).sub.p (HO).sub.2-p PO.sub.2.sup..crclbar. R".sub.2 N.sup..sym. R".sub.2(V)
• in which p and R have the same meaning as above, R' denotes a linear or branched alkyl radical containing from 6 to 18 carbon atoms and R" is a methyl or ethyl radical, and optionally
• c) a compound of formula:
• R'.sub.2 N.sup..sym. R".sub.2 Cl.sup..crclbar. (III)
• in which R' and R" have the same meanings as previously, in a proportion of 0.5 to 0.7 mol of compound(s) of formula (IV), 0.5 to 0.3 mol of compound(s) of formula (V) and 0 to 0.5 mol of compound of formula (III) per mol of compounds (IV) and (V).