Hydroxynaphthalene trisazo dyestuffs

Details Hydroxynaphthalene trisazo dyestuffs Hydroxynaphthalene trisazo dyestuffs

1975-04-25

1977-02-22

Wyman, Daniel E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260159, 260184, 260191, 260205, C09B 3122, C09B 3128, C09B 3320, C09B 3538

Patent

active

040091562

ABSTRACT:
The subject matter of the invention is trisazo dyestuffs, which in the form of the free acid correspond to general formula ##STR1## wherein K.sub.1 denotes the radical of the 2,8-dihydroxynaphthalene-6-sulfonic acid (coupled in alkaline medium) or of the 2-amino-8-hydroxynaphthalene-6-sulfonic acid (coupled in acidic medium),
K.sub.2 denotes the radical of a coupling component,
R.sub.1 denotes hydrogen or methoxy,
R.sub.2 denotes hydrogen or methyl and
R.sub.3 denotes hydrogen or chlorine, with the proviso that the total number of sulfonic acid groups is 1 or 2.

REFERENCES:
patent: 536532 (1895-03-01), Kirchhoff
patent: 536879 (1895-04-01), Kirchhoff
patent: 536880 (1895-04-01), Kirchhoff
patent: 615497 (1898-12-01), Ris et al.
patent: 658897 (1900-10-01), Israel et al.
patent: 1209154 (1916-12-01), Haugwitz
patent: 2203196 (1940-06-01), Hanhart
patent: 2286714 (1942-06-01), Chechak
patent: 2777839 (1957-01-01), Bockmann et al.
patent: 3487067 (1969-12-01), Mudrak et al.

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