Dye composition comprising a cationic meta-phenylenediamine

A meta-phenylenediamine compound of formula (I), acid addition salts thereof, and solvates thereof:

• wherein:
• R is chosen from a hydrogen or halogen atom;
• a C1-C4 alkyl group;
• a carboxyl group, or a (C1-C4)alkoxycarbonyl group;
• R1 is chosen from a C1-C10 (hydroxy)alkyl group, optionally interrupted with one or more non-adjacent oxygen atoms or non-adjacent NR′ substituents, substituted by a cationic CAT group;
• R2 is chosen from a hydrogen atom or a C1-C4(hydroxy)alkyl group;
• R1 and R2 may optionally form, together with the atom that bears them, a cationic heterocycle with 5 to 8 members;
• R′ is chosen from a hydrogen atom or a C1-C4(hydroxy)alkyl group;
• and
• An- is chosen from an anion or a mixture of anions which are organic or inorganic and cosmetically acceptable.

A composition for dyeing keratin fibers comprising, in a medium that is suitable for dyeing keratin fibers, at least one compound chosen from meta-phenylenediamine compounds of formula (I), acid addition salts thereof, and solvates thereof:

• wherein:
• R is chosen from a hydrogen or halogen atom;
• a C1-C4 alkyl group;
• a carboxyl group, or a (C1-C4)alkoxycarbonyl group;
• R1 is chosen from a C1-C10 (hydroxy)alkyl group, optionally interrupted with one or more non-adjacent oxygen atoms or non-adjacent NR′ substituents, substituted by a cationic CAT group;
• R2 is chosen from a hydrogen atom or a C1-C4(hydroxy)alkyl group;
• R1 and R2 may optionally form, together with the atom that bears them, a cationic heterocycle with 5 to 8 members;
• R′ is chosen from a hydrogen atom or a C1-C4(hydroxy)alkyl group;
• and
• An- is chosen from an anion or a mixture of anions which are organic or inorganic and cosmetically acceptable.

A process for dyeing keratin fibers, comprising applying a dyeing composition to said fibers, either alone or in the presence of an oxidizing agent, for a time that is sufficient to develop the desired color, wherein said dyeing composition comprises at least one meta-phenylenediamine compound of formula (I), acid addition salts thereof, and solvates thereof:

• wherein:
• R is chosen from a hydrogen or halogen atom;
• a C1-C4 alkyl group;
• a carboxyl group, or a (C1-C4)alkoxycarbonyl group;
• R1 is chosen from a C1-C10 (hydroxy)alkyl group, optionally interrupted with one or more non-adjacent oxygen atoms or non-adjacent NR′ substituents, substituted by a cationic CAT group;
• R2 is chosen from a hydrogen atom or a C1-C4(hydroxy)alkyl group;
• R1 and R2 may optionally form, together with the atom that bears them, a cationic heterocycle with 5 to 8 members;
• R′ is chosen from a hydrogen atom or a C1-C4(hydroxy)alkyl group;
• and
• An- is chosen from an anion or a mixture of anions which are organic or inorganic and cosmetically acceptable.