Azo dyes from a 5-aminopyrazole bearing 1 to 2 sulfated hydroxyalkoxycarbonyl or N-(hydroxyalkyl) carbamoyl groups on its ring
AssigneeEastman Kodak Company
InventorsRalph R. Giles, Max A. Weaver
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AssigneeEastman Kodak Company
InventorsRalph R. Giles, Max A. Weaver
Estimating the term…
This invention relates to azo dyes in which the diazotized amino component bears 1 or 2 sulfated hydroxyalkoxycarbonyl or N-(hydroxyalkyl)carbamoyl groups on its ring. These dyes have excellent dyeing properties on polyamide fibers and also impart color to cellulose acetate fibers and wool. The dyes correspond to the formula: ##STR1## wherein when n is 1, R.sup.1 is selected from hydrogen, alkyl, aryl, alkylthio, carbamoyl, alkylcarbamoyl, acyl, cyanoalkyl, and halogen; R is selected from hydrogen, alkyl, aryl, acyl, alkylsulfonyl, arylsulfonyl alkylsulfamoyl, arylsulfamoyl, alkyl substituted with alkoxy, cyano, or halogen, and aryl substituted with alkoxy, halogen, or cyano; X' is O, NH, N(alkyl)--or N(aryl)--; Z is selected from straight- or branched-chain alkylene which may be substituted, for example, with phenyl, halogen, OSO.sub.3 M, alkoxy, aryloxy and the like; M is H, Na, K or NH.sub.4 ; n is 1 or 2; and the coupler C is selected from a variety of couplers including anilines, tetrahydroquinolines, phenols and the like.
A dye of the formula:
Dependencies are inferred from the claim text.