2,4-Dihydroxydiphenylamines and hair dyeing compositions and met

Details 2,4-Dihydroxydiphenylamines and hair dyeing compositions and met 2,4-Dihydroxydiphenylamines and hair dyeing compositions and met

1981-01-15

1985-01-22

Ramsuer, Robert W.

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

8409, 8416, 8421, 8423, 544166, 546232, A61K 713, C09B 5700

Patent

active

044949537

ABSTRACT:
This invention pertains to compounds suitable for dyeing keratin fibers, especially human hair. The compounds have the formula: ##STR1## or an acid addition salt thereof, in which formula R.sub.1 and R.sub.2 form, together with the nitrogen atom to which they are bonded, a morpholino or piperidino ring and R represents a hydrogen atom.
This invention also pertains to compositions for dyeing keratin fibers, especially human hair, such composition containing the compounds set forth above and/or compounds of formula (I) wherein R.sub.1 represents a hydrogen atom, R.sub.2 represents a tetrahydrofurfuryl or methoxyethyl radical and R represents a hydrogen atom or a methyl radical, or an acid addition salt thereof.
The invention also pertains to the method of using these compositions.

REFERENCES:
patent: 3892749 (1975-07-01), Kalopissis et al.
patent: 3929404 (1975-12-01), Kalopissis et al.
patent: 3984443 (1976-10-01), Kalopissis et al.
patent: 4008999 (1977-02-01), Kalopissis et al.
patent: 4263213 (1981-04-01), Bugaut et al.

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