Concentrated direct dye solution and process therefor

Details Concentrated direct dye solution and process therefor Concentrated direct dye solution and process therefor

1975-05-21

1977-04-26

Higel, Floyd D.

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

260172, 260178, 260184, 260191, 260205, C09B 6700, D06P 1645

Patent

active

040198588

ABSTRACT:
A concentrated dye solution comprising the direct red dye: ##STR1## where Me is an alkali metal and R is hydrogen, methyl or ethyl ater and urea; and a method for its preparation in situ by a defined sequence of process steps are disclosed.

REFERENCES:
patent: 2928712 (1960-03-01), Bradshaw
patent: 2981729 (1961-04-01), Kesler et al.
patent: 3023071 (1962-02-01), Jiroy
patent: 3521989 (1970-07-01), Angliss et al.
patent: 3635944 (1972-01-01), Litke
Beilstein, "Handbuch der Organischen Chemie", vol. 16, Second Supplement, p. 234 (1951).
Ambrect et al., Chemical Abstracts, vol. 77, Item No. 166142n (1972).

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