Cationic amino-dianthraquinones, use thereof, dyeing compositions containing them and dyeing processes

The invention relates to amino-anthraquinones cationi di-cal having at least one cationic group Z, Zétant selected from quaternized aliphatic chains, aliphatic chains having at least one quaternized cyclesaturé and aliphatic chains containing atleast one quaternized unsaturated ring, their aTitle use in direct dye compositions teinturepour keratin materials, in particular for human fibreskératiniques such as hair dye containing lescompositions and lesprocédés dyeing implementing them. This nouvellefamille dyes, has the distinction of trèsavantageuse high solubility in backstaining environments and these new dyes generate desteintures by direct dyeing, with a grandepuissance and high weather resistance.