Patent ID: 7220286

Claim:
A cationic direct dye of formula (I): wherein: W 1 is chosen from —NR 8 — and —O—; X 1 is chosen from N and CR 9 ; R 1 and R 2 , which may be identical or different, are each a hydrocarbon chain; R 3 and R 4 , which may be identical or different, are each chosen from hydrogen atoms, halogen atoms, nitro groups, cyano groups, and hydrocarbon chains; R 5 , R 6 , R 7 , R 8 and R 9 , which may be identical or different, are each chosen from hydrogen atoms and hydrocarbon chains; L is chosen from: wherein: R 10 , R 11 , R 12 and R 13 , which may be identical or different, are each a hydrocarbon chain; Y is a halogen atom; the bond a in formulas (II), (III), (IV), (V), (VI), and (VII) is connected to group W 1 of formula (I); and X is chosen from cosmetically acceptable organic anions and cosmetically acceptable mineral anions.