Cosmetic composition comprising anionic surfactants, amphoteric surfac-tants, cationic polymers and liquid fatty substances chosen from fatty alco-hols and fatty esters, and cosmetic treatment process

A cosmetic composition comprising:

• one or more anionic surfactants present in a total amount ranging from 7% to 15% by weight relative to the total weight of the composition,
• one or more amphoteric surfactants,
• one or more cationic polymers with a cationic charge density of greater than or equal to 4 meq./g chosen from cyclopolymers of alkyldiallylamine or of dialkyldiallylammonium, containing, as main constituent of the chain, units corresponding to formula (I) or (II):
• in which
• k and t are equal to 0 or 1, the sum k+t being equal to 1;
• R12 denotes a hydrogen atom or a methyl radical;
• R10 and R11, independently of each other, denote a C1-C6 alkyl group, a C1-C5 hydroxyalkyl group, a C1-C4 amidoalkyl group;
• or alternatively R10 and R11 may denote, together with the nitrogen atom to which they are attached, a heterocyclic group;
• R10 and R11, independently of each other, denote a C1-C4 alkyl group;
• and
• Y− is an anion, and
• one or more liquid fatty substances chosen from non-oxyalkylenated alcohols comprising at least 8 carbon atoms, monocarboxylic acid esters comprising at least 8 carbon atoms, and mixtures thereof.