59820-27-8Relevant academic research and scientific papers
Tinctorial composition for keratin fibres, based on nitrated benzene dyestuffs
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, (2008/06/13)
A process for dyeing keratin fibres is disclosed which involved applying: (a) at least one dyestuff of the formula: STR1 in which R1 and R2 independently designate hydrogen, amino, alkylamino, --NH--aliphatic--(X)m, dialkylamino or --N--(aliphatic-(X)m)2, R3 designates hydrogen, OH, alkoxy or --O--aliphatic-(X)m "aliphatic" designates an aliphatic radical having 2 to 4 free valencies, m designates an integer from 1 to 3 such that if m=1 X represents OH, Cl, OCH3 or OCH2 CH2 OH, or, if m designates 2 or 3, X designates OH, and R4 designates hydrogen, alkyl or halogen, with the proviso that at least one of R1, R2 and R3 is other than hydrogen, and that, if R1 and R2 are both other than hydrogen, R3 designates hydrogen, (b) at least one dyestuff of the formula: STR2 in which R5 designates hydrogen, amino, aminoalkyl, NH-aliphatic-(X)m, N-(alkyl)2, N-(aliphatic(X)m)2, or NHCH2 CH2 NH2, R6 designates hydrogen, OH, alkoxy, O-aliphatic(X)m or O(CH2)n NH2, R7 designates hydrogen, alkyl or halogen, A designates-Y-(CH2)--n, --OCH2 CHOH--CH2 -- or STR3 where R8 designates hydrogen or methyl, Y designates oxygen or --NH-- and n is an integer from 2 to 4, and m "aliphatic" and X are as defined above, with the proviso that, if Y designates --NH-- and R6 is other than hydrogen, R5 designates hydrogen, and, if Y is an oxygen atom, R6 designates hydrogen, the shade and chromaticity of the color obtained with the dyestuff(s) of formula (I) and the shade and chromaticity of the color obtained with the dyestuff(s) of formula (II) being such that ΔH+ΔC is less than or equal to 4.5
