The present disclosure relates to compositions for colouring keratin fibres, in particular human hair, where the composition comprises, in a cosmetic carrier, at least one neutral tetraaminopyrimidine derivate of the general formula (I), (I) in which R1, R2 independently of one another are a group of the formulae (II), (III) or (IV) —(CH
2
)
n
— (II) —(CH
2
)
m
—O—(CH
2
)
p
— (III) —(CH
2
)
m
—N(R3)-(CH
2
)
p
— (IV) n is 2, 3, 4, 5 or 6, m, p in each case independently of one another are 1, 2 or 3, Y is —OH, —NH
2
or —NH-alkyl, R3 is a hydrogen atom, a C
1
-C
6
-alkyl group or is a C
2
-C
6
-alkenyl group.
本公开涉及用于染色角蛋白纤维的组合物,特别是用于染色人类头发的组合物,其中该组合物在化妆品载体中包含至少一种通式(I)的中性四
氨基嘧啶衍
生物,(I)式中,R1,R2独立地是式(II),(III)或(IV)的基团,—(
CH2)n—(II)—( )m—O—( )p—(III)—( )m—N(R3)-( )p—(IV)其中n为2,3,4,5或6,m,p各自独立地为1,2或3,Y为—OH,—NH2或—NH-烷基,R3为氢原子,C1-C6-烷基或C2-C6-烯基。