Process for producing a cosmetic composition for application to the hair, composition obtained by this process and process for cosmetic treatment with the aid of the said composition

A process for producing a cosmetic composition for application to the hair, said composition comprising in an aqueous dispersion phase a dispersion of vesicles comprising at least one nonionic amphiphilic lipid capable of forming vesicles and at least one water-insoluble, volatile or non-volatile silicone in the form of an oil, gum or resin, said nonionic amphiphilic lipid being present in said composition in an amount ranging from 1 to 20 weight percent based on the total weight of said composition and said silicone being present in an amount ranging from 0.5 to 10 weight percent based on the total weight of said composition, said process comprising

• (a) admixing said nonionic amphiphilic lipid capable of forming vesicles with said water-insoluble volatile or non-volatile silicone,
• (b) mixing the mixture resulting from step (a) with an aqueous phase to be encapsulated in the vesicles to be formed and agitating the resulting mixture until said vesicles are formed, and
• (c) dispersing the formed vesicles in an aqueous phase,
• said nonionic amphiphilic lipid being a linear or branched ether or ester of polyglycerol having the formula
• RO--[--C.sub.3 H.sub.5 (OH)--O--].sub.n --H
• wherein
• --C.sub.3 H.sub.5 (OH)--O-- represents in a mixture or separately --CH.sub.2 --CHOHCH.sub.2 --O-- ##STR14## n has a mean statistical value ranging from 2 to 6, and R represents either
• (a) an aliphatic chain R.sub.1 or an R.sub.2 CO radical wherein R.sub.1 is a linear or branched C.sub.12 -C.sub.17 aliphatic radical and R.sub.2 is a linear or branched C.sub.11 -C.sub.17 aliphatic radical, or
• (b) R.sub.3 [OC.sub.2 H.sub.3 (R.sub.4)], wherein --OC.sub.2 H.sub.3 (R.sub.4)-- represents, in a mixture or separately, ##STR15## wherein R.sub.3 is R.sub.1 and R.sub.2 CO and R.sub.4 is R.sub.1, wherein R.sub.1 and R.sub.2 have the meanings given above
• wherein said water-insoluble volatile or non-volatile silicone is selected from the group consisting of
• a polydimethylsiloxane,
• a mixture of a polydimethylsiloxane and a trimethylsiloxysilicate,
• a polydimethylsiloxane modified by a hydroxyl group at the end of the chain,
• a polydimethylsiloxane modified by a C.sub.12 -C.sub.22 alkoxy group,
• a polydimethylsiloxane modified by a polyoxyalkylene group wherein the alkylene moiety has 2-3 carbon atoms,
• a polydimethylsiloxane modified by an acyloxyalkyl radical wherein the acyl moiety has 12-22 carbon atoms and the alkyl moiety has 1-4 carbon atoms,
• a polydimethylphenylsiloxane, a polymethylalkylsiloxane wherein the alkyl moiety has 20 carbon atoms,
• a polymethylalkylarylsiloxane, wherein the alkyl moiety has 1-4 carbon atoms, modified by an alkylamine group wherein the alkyl moiety has 1-4 carbon atoms, and
• a cyclopolysiloxane,
• and wherein non-volatile silicone is in solution in at least one cyclic volatile silicone oil.