Cosmetic process for treating keratin fibres, comprising the application of a base composition and a composition comprising a polyol

A cosmetic process for caring and/or conditioning hair comprising:

• (i) a step of mixing at least:
• a first composition comprising one or more non-amino oxyethylenated silicones, one or more cationic surfactants, and less than 10% by weight of water relative to the total weight of the first composition, and
• a second composition comprising water and one or more polyols, so as to obtain a final cosmetic composition, and then
• (ii) a step of applying the final cosmetic composition to the hair;
• the one or more non-amino oxyethylenated silicones being non-oxypropylenated;
• and
• wherein the one or more non-amino oxyethylenated silicones of the first composition are chosen from the compounds of the formula (II) below:
• in which formula (II):
• R1 denotes a methyl radical,
• R2 independently represents a radical —CcH2c—O—(C2H4O)a—R5,
• a ranges from 2 to 20,
• c is equal to 2 or 3,
• R5 represents a hydrogen atom resulting in a terminal hydroxyl group on R2,
• n ranges from 12 to 100,
• p ranges from 1 to 20;
• and wherein the one or more cationic surfactants of the first composition are chosen from the following compounds:
• quaternary ammonium salts of formula (VI) below:
• in which formula (VI):
• the groups R8 to R11 independently represent a linear or branched aliphatic group comprising from 1 to 30 carbon atoms, at least one of the groups R8 to R11 denoting a linear or branched aliphatic radical comprising from 12 to 24 carbon atoms, and
• X− is an anion chosen from the group of halides, phosphates, acetates, lactates, (C1-C4)alkyl sulfates, (C1-C4)alkylsulfonates and (C1-C4)alkylarylsulfonates.