Surface demoisturizing composition and use thereof

A demoisturizing composition for the displacement of liquid water comprising trichloro-1,1,2-trifluoro-1,2,2-ethane and a sufficient amount of a surface-active agent corresponding to the formula:

• ##STR37## where said surface-active agent is prepared by mixing the following compounds:
• ##STR38##
• (R"O).sub.p (HO).sub.2-p PO.sub.2 H, and (2)
• R.sub.F C.sub.2 H.sub.4 SO.sub.2 NHC.sub.3 H.sub.6 N(CH.sub.3).sub.2 ( 3)
• wherein:
• ##STR39## is a didodecyl dimethyl ammonium cation, a dioctadecyl dimethyl ammonium cation, or mixtures of homologues principally containing either of those cations;
• (R"O).sub.p (HO).sub.2-p PO.sub.2 H is a mixture of monobutyl and dibutyl phosphoric acids or a mixture of monooctyl and dioctyl phosphoric acids;
• and
• R.sub.F is a straight or branched perfluorinated alkyl chain of formula C.sub.q F.sub.2q+1 in which q is a whole number ranging between 2 and 20, and wherein R.sub.f C.sub.2 H.sub.4 SO.sub.2 NHC.sub.3 H.sub.6 N(CH.sub.3).sub.2 is at least partially present as a soluble hydrochloride.

A demoisturizing composition for the displacement of liquid water, comprising trichloro-1,1,2-trifluoro-1,2,2, ethane and a sufficient amount of a surface active agent corresponding to the formula:

• ##STR40## wherein said surface-active composition is prepared by mixing the following compounds:
• ##STR41##
• (R"O).sub.p (HO).sub.2-p PO.sub.2 H, and (2)
• C.sub.6 F.sub.13 C.sub.2 H.sub.4 SO.sub.2 NHC.sub.3 H.sub.6 (CH.sub.3).sub.2 ( 3)
• wherein ##STR42## is a didodecyl dimethyl ammonium cation, a dioctadecyl dimethyl ammonium cation, or mixtures of homologues principally containing either of those cations;
• and
• (R"O).sub.p (HO).sub.2-p PO.sub.2 H is a mixture of monooctyl or dioctyl phosphoric acids, with the proportion of mono to di acid ranging from about 40:60 to 60:40, and wherein C.sub.6 F.sub.13 C.sub.2 H.sub.4 SO.sub.2 NHC.sub.3 H.sub.6 (CH.sub.3).sub.2 is at least partially present as a soluble hydrochloride.

A demoisturizing composition for the displacement of liquid water comprising a chlorofluorocarbon having at least two carbon atoms that is liquid at room temperature, and a sufficient amount of a surface-active agent corresponding to the formula:

• ##STR43## in which:
• R is an alkyl group containing 6 to 18 carbon atoms;
• R' is an alkyl group containing 1 to 2 carbon atoms;
• and
• R" is an alkyl group containing 1 to 18 carbon atoms;
• and
• p is a value ranging between 1 and 2;
• wherein said surface-active composition is prepared by mixing the following compounds:
• ##STR44## wherein ##STR45## is a didodecyl dimethyl ammonium cation, a dioctadecyl dimethyl ammonium cation, or mixture of homologues principally containing either of those cations;
• (R").sub.p (HO).sub.2-p PO.sub.2 H is a mixture of monooctyl and dioctyl phosphoric acids;
• R.sub.f represents a straight or branched perfluorinated alkyl chain of formula C.sub.q f.sub.2q+1 in which q is a whole number ranging between 2 and 20 and where x is a divalent bond group which can be partially halogenated;
• and R.sub.1 and R.sub.2 represent a hydrogen atom, an alkyl radical, or a hydroxy alkyl radical containing less than 6 carbon atoms, and wherein ##STR46## is at least partially present as a soluble hydrochloride.