Patent ID: 6176885
Filing Date: 2001-01-23
Classification: A61K,A61Q,C07F,Y10S

Abstract:
A dye composition for human keratin fibres, comprising at least one compound of formula (2) or a salt thereof in a medium which is suitable for dyeing: ##STR28##wherein:each R is the same or different from each other selected from C.sub.1 -C.sub.10 alkyl, phenyl, and 3,3,3-trifluoropropyl radicals, at least 80%, in numerical terms, of the radicals R being methyl,u is an integer ranging from 1 to 6,t is an integer ranging from 0 to 10, with the condition that t+u is equal to or greater than 3, andeach A denotes a radical independently selected from formula (4a), (4b), (4c), and (4d) below: ##STR29##wherein:each R.sub.4 independently represents a linear or branched C.sub.1 -C.sub.6 alkyl radical, OH, C.sub.1 -C.sub.4 alkoxy, hydroxy(C.sub.1 -C.sub.4)alkyl, COOH, CONH.sub.2, CN, SO.sub.3 H, a halogen, an NO.sub.2 radical, or a radical NR.sub.5 R.sub.6, whereinR.sub.5 and R.sub.6 independently denote a hydrogen atom, a C.sub.1 -C.sub.8 alkyl or hydroxy(C.sub.1 -C.sub.4)alkyl or amino(C.sub.1 -C.sub.4)alkyl radical, or form, together with the nitrogen atom to which they are attached, a 5- or 6-membered heterocycle which is interrupted by an oxygen or sulphur atom;m is an integer ranging from 0 to 2;n is an integer equal to 1 or 2;D is an --SO.sub.2 NH--, --CONH-- or --O-- radical or a radical --NR.sub.7 -- wherein R.sub.7 is H or CH.sub.3 ; andW is a divalent radical of formula (5): ##STR30##or of formula (6):--HC.dbd.CH--Z).sub.p -- (6)wherein:R.sub.8 denotes a hydrogen atom, a hydroxyl radical or a linear or branched, saturated or unsaturated, C.sub.1 -C.sub.8 alkyl radical,Z is a linear or branched C.sub.1 -C.sub.6 alkylene radical optionally substituted with an OH radical or a linear or branched, saturated or unsaturated, C.sub.2 -C.sub.8 alkoxy radical, andp is an integer equal to 0 or 1,with the proviso that in formula (2), when(i) A is a group of formula (4a), wherein t is equal to 0, and u ranges from 3 to 6, and R.sub.4 is NH.sub.2 and m=0 or 1, and D is NH, then W is a radical of formula (5) other than for which R.sub.8 is H, Z is methylene, and p is equal to 1;(ii) A is a group of formula (4d), wherein t is equal to 3, and u is equal to 1, and R.sub.4 denotes --OCH.sub.3, and m is equal to 1, and D is an --O-- radical, then W is a radical of formula (5) other than for which R.sub.8 is H, Z is methylene, and p is equal to 1; and(iii) A is a group of formula (4d), wherein t is equal to 0, and u is equal to 4, and R.sub.4 is an NO.sub.2 radical, and m is equal to 1, and D is a radical --NCH.sub.3 -- then W is a radical of formula (5) other than for which R.sub.8 is H, Z is methylene, and p is equal to 1.