1:2 metal complexes of a disazo compound having a 5-hydroxy-1-(aminophenyl)pyrazole coupling/diazo component radical and disazo compound having a 1-amino-8-hydroxynaphthalene coupling/diazo component
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United States of America Patent
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Mar 10, 1987
Grant Date -
N/A
app pub date -
Jul 27, 1983
filing date -
Jul 28, 1982
priority date (Note) -
Expired
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Importance
Abstract
1:2 Metal complexes of the formula ##STR1## wherein X.sub.1 is --O-- or ##STR2## and X.sub.2 is --O-- or ##STR3## the starred atom being attached A.sub.1 or A.sub.2, respectively, A.sub.1 is a diazo component radical of the benzene series, A.sub.2 is a diazo component radical of the benzene or naphthalene series, W is --CH.sub.3 or --COOH, R is hydrogen or --SO.sub.3 H, each of B.sub.1 and B.sub.2 is independently a coupling component radical or a phenolic hydroxy group-containing coupling component radical at least one phenolic hydroxy group of which is etherified or acylated, M is iron, cobalt or chromium, and n is 1 or 2, which complexes are useful as anionic dyestuffs having olive to brown colors for substrates such as natural and regenerated cellulose, natural and synthetic polyamides, polyurethane and anodized aluminum, especially leather.
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