Patent ID: 7550016

Claim:
Method of dyeing keratin-containing fibers comprising treating the fiber with at least one sulfide dye of formula (1), their salts, isomers, hydrates and other solvates, wherein R 1 , R 2 , R 3 and R 4 independently from each other are hydrogen; C 1 -C 20 alkyl; C 1 -C 20 alkoxy; C 3 -C 6 cycloalkyl; halogen; NO 2 ; NH 2 ; OH; SH; or a radical of formula wherein R 5 is hydrogen; or C 1 -C 20 alkyl; R 6 , R 7 and R 8 independently from each other are hydrogen, C 1 -C 20 alkyl, C 4 -C 12 cycloalkyl, C 6 -C 13 aralkyl; or phenyl-C 1 -C 5 alkyl; or R 6 and R 7 together with the linking nitrogen atom form a C 4 -C 12 -membered heterocyclic ring which may be interrupted by one or more than one —O— or —NH— groups; Y 1 is C 1 -C 10 alkylene; C 5 -C 10 cycloalkylene; C 5 -C 10 arylene; or C 5 -C 10 arylene-(C 1 -C 10 alkylene); T 1 is a radical of formula or is —O—(X 3 ) s ; Q 1 is a cationic biradical of a saturated, aromatic or heteroaromatic group; or a radical of formula Z 1 is —C(O)—; —(CH 2 CH 2 —O) 1-5 —; —C(O)O—; —OCO—; CON(R 9 )—; —X 4 —CON(R 9 )—; —(R 9 )NC(O)—; —O—; —S—; —S(O)—; or —S(O) 2 —; R 9 , R 10 and R 11 each independently from each other are hydrogen; C 1 -C 14 alkyl; C 2 -C 14 alkenyl; C 6 -C 10 aryl; C 6 -C 10 aryl-C 1 -C 10 alkyl; or C 1 -C 10 alkyl(C 5 -C 10 aryl); X 1 , X 2 , X 3 and X 4 independently from each other are C 1 -C 18 alkylene; —(CO)—C 1 -C 18 alkylene; C 1 -C 18 arylene; C 6 -C 18 arylene-C 1 -C 12 alkylene; or —(OCH 2 CH 2 ) n —O—; n is a number from 1 to 5; p, r, s, t and u independently from each other are 0 or 1; m is 1 or 2; U is hydrogen if m is 1; and U is a direct bond if m is 2.