Stable W/O/W emulsion and its use as cosmetic and/or dermatological composition

A water/oil/water triple emulsion, comprising:

• an inner aqueous phase emulsified in an oily phase;
• and
• a gelled outer aqueous phase,
• wherein
• the oily phase comprises an emulsifier selected from the group consisting of alkyl dimethicone copolyols and dimethicone copolyols, and
• the outer aqueous phase comprises:
• (1) at least one emulsifying copolymer composed to a major extent of a polymerized monoolefinically unsaturated C.sub.3 -C.sub.6 carboxylic acid monomer or of an anhydride thereof and to a minor extent of an acrylic acid fatty ester monomer, and
• (2) at least one crosslinked poly(acrylamidomethyl-propanesulfonic acid) comprising, distributed randomly:
• (a) from 90 to 99.9% by weight of units represented by formula (III):
• ##STR5## wherein X.sup.+ is a cation or a mixture of cations, (b) from 0.01 to 10% by weight of crosslinking units derived from at least one monomer having at least two olefinic double bonds;
• wherein the percentages of by weight of (a) and (b) are with respect to the total weight of the crosslinked poly(acrylamidomethyl-propanesulfonic acid).