Method of dyeing keratin-containing fibres

Details Method of dyeing keratin-containing fibres Method of dyeing keratin-containing fibres

2007-03-13

2007-03-13

Elhilo, Eisa (Department: 1751)

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Hair dyeing

C008S466000, C008S570000, C008S573000, C008S437000, C132S202000, C132S208000, C548S300100

Reexamination Certificate

active

11235912

ABSTRACT:
A method of dyeing keratin-containing fibres, which comprises using a dye of formulawhereinR1and R2are each independently of the other hydrogen, C1–C4alkyl, halogen or nitro,R3and R4are each independently of the other unsubstituted C1–C4alkyl or C1–C4alkyl substituted by OH, C1–C4alkoxy, halogen, CN or by phenyl,X1and X2are each independently of the other hydrogen, C1–C4alkyl, C1–C4alkoxy or halogen,R5is hydrogen or C1–C4alkyl,R6is C5–C12alkyl or C5–C8cycloalkyl each unsubstituted or substituted by OH, C1–C4alkoxy, halogen, CN or phenyl, or R6is C1–C4alkyl substituted by phenyl or by C5–C8cycloalkyl, or wherein R5and R6together with the nitrogen atom linking them form a piperazine ring, which is substituted, at the nitrogen atom that is not bonded to the phenyl group, by C1–C8-alkyl or phenyl, or which is quaternised at that nitrogen atom by two such groups, the C1–C8-alkyl radicals and phenyl mentioned as substituents of the nitrogen atom of the piperazine ring being unsubstituted or substituted by OH, C1–C4alkoxy, halogen, CN or phenyl,and wherein X−is an anion.

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