4,5-dIiminopyrazolines, processes for their preparation, and the

Details 4,5-dIiminopyrazolines, processes for their preparation, and the 4,5-dIiminopyrazolines, processes for their preparation, and the

1997-03-21

1999-08-03

Liott, Caroline D.

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

8405, 8568, 8573, 8575, 8577, 5462754, 5483657, 5483674, 5483714, 5483725, A61K 713, C07D23110

Patent

active

059319739

ABSTRACT:
Dyes selected from 4,5-diiminopyrazolines or their 4-ylideneamino-5-aminopyrazole tautomeric forms, a process for their preparation, and their use as direct dyes in dye compositions for keratin fibers, in particular for human keratin fibers. The dyes may also be used in lightening or non-lightening dye compositions for the direct dyeing of keratin fibers, and in dyeing processes using these compositions.

REFERENCES:
patent: 3929403 (1975-12-01), Kalopissis et al.
patent: 3956342 (1976-05-01), Kalopissis et al.
patent: 4246181 (1981-01-01), Kalopissis et al.
patent: 4675130 (1987-06-01), Kalopissis et al.
patent: 5430159 (1995-07-01), Neunhoeffer et al.
Chemical Abstract, vol. 105, No. 7925a, Jul. 14, 1986, "Azomethine, azo and methine dyes of 5-hydroxy-5-hydroxy-5-amino- and 5-thiolo-3-methyl-1-phenyl-pyrazole."
Venkataraman, The Chemistry of Synthetic Dyes, vol. 1, Academic Press Inc., NY, p. 276, 1952 (no month available).

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