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Azo dyestuffs containing an amino or acylated amino naphthol di- sulfonic acid radical and at least one reactive phosphoric or phosphonic acid group
Azo dyestuffs containing an amino or acylated amino naphthol di- sulfonic acid radical and at least one reactive phosphoric or phosphonic acid group
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机译:包含氨基或酰化氨基萘酚二磺酸基团和至少一个反应性磷酸或膦酸基团的偶氮染料
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摘要
Azo dyestuffs of the formula: ##STR1## wherein A is a phenylene or naphthalene nucleus containing at least one phosphoric or phosphonic acid group; R.sub.1 and R.sub.2 are hydrogen or --SO.sub.3 H; and R.sub.3 -R. sub.6 are hydrogen, --SO.sub.3 H, or NR.sub.7 Q wherein R. sub.7 is hydrogen or lower alkyl and Q is hydrogen or an acyl group of 2 to 8 carbon atoms, at least two of R.sub.1 -R.sub.6 being --SO.sub.3 H and at least one being --NHQ, provided that when the dyestuff is monoazo, then Q is an acyl group of 3 to 8 carbons and when the dyestuff is disazo, Q is hydrogen or an acyl group of 2 to 8 carbon atoms. The dyestuff may be used to reactively dye cellulosic materials, e.g., cotton or cotton/polyester blends. The dyestuffs are particularly useful in dyeing mixed fabrics of cellulose and synthetics together with disperse dyes from a single bath.
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