5,6-Dihydroxyindolines as additives for hair dyeing...

Details 5,6-Dihydroxyindolines as additives for hair dyeing... 5,6-Dihydroxyindolines as additives for hair dyeing...

2005-04-12

2005-04-12

Einsmann, Margaret (Department: 1751)

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

C008S423000, C008S635000, C008S638000, C008S643000, C008S670000, C008S675000, C548S476000, C548S490000

Reexamination Certificate

active

06878170

ABSTRACT:
The invention concerns the use of indoline derivatives of formula (I):in which R1, R2, R3, R4and R5independently of one another represent hydrogen or C1-4alkyl groups, or R4and R5together with the oxygen atoms to which they are attached represent a C1-4alkylenedioxy group, or of salts of such indoline derivatives, as additives to hair dyeing agents of the direct dyeing or primary intermediate/secondary intermediate type, thus producing hair dyeing with excellent color fastness characteristics.

REFERENCES:
patent: 3649160 (1972-03-01), Kalopissis et al.
patent: 5102655 (1992-04-01), Yoshihara et al.
patent: 5178637 (1993-01-01), Lagrange et al.
patent: 6569211 (2003-05-01), Matzik et al.

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