Sulfophenyl-azo-phenyl-azo-(4-hydroxyalkoxyphenyl) compounds
AssigneeE. I. Du Pont de Nemours and Company
InventorSteven Arnold Dombchik
Life of this patent
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Abstract
Yellow to orange, disazo acid dyes which have excellent application and fastness properties on nylon fibers, do not change shade under basic conditions and have the formula ##STR1## wherein SO.sub.3 M is meta or para to the azo group, R.sub.1 is selected from H, CH.sub.3, OCH.sub.3 and Cl, R.sub.2 and R.sub.3 are independently selected from H, CH.sub.3 and OCH.sub.3, R.sub.4 and R.sub.5 are independently selected from H, Cl and CH.sub.3, but only one can be Cl, R.sub.6 is selected from CH.sub.3 and C.sub.2 H.sub.5 and M is, C.sub.1-4 alkylammonium and C.sub.1-2 alkanolammonium cations.
Claims9
Yellow to orange, disazo acid dye having the formula ##STR2## wherein SO.sub.3 M is meta or para to the azo group, R.sub.1 is selected from H, CH.sub.3, OCH.sub.3 and Cl, R.sub.2 and R.sub.3 are independently selected from H, CH.sub.3 and OCH.sub.3, R.sub.4 and R.sub.5 are independently selected from H, Cl and CH.sub.3, but only one can be Cl, R.sub.6 is C.sub.2 H.sub.5 and M is selected from H, alkali metal, ammonium, Cl-4 alkylammonium and Cl-2 alkanolammonium cations.
Dependencies are inferred from the claim text.