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US 4,216,145 AGranted
Water-insoluble mono-azo yellow dyes derived from 1-phenyl-3-aminopyrazoles
AssigneeMontedison S.p.A.
InventorsRuggero Battisti, Gioacchino Boffa, Nicola Mazzaferro, Angelo Mangini, Antonio Tundo
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Abstract
New yellow mono-azo dyes which are insoluble in water are disclosed. The dyes are derived from 1-phenyl-3-aminopyrazoles and are particularly effective in dyeing synthetic hydrophobic fibers to intense yellow shades.
Claims14
A water-soluble yellow monoazo dye, having the formula:
- ##STR17## in which R is H or CH.sub.3 ;
- R.sub.1 is CH.sub.3 or C.sub.2 H.sub.5 ;
- R.sub.2 is CH.sub.3, C.sub.2 H.sub.5, or C.sub.3 H.sub.7 ;
- R.sub.3 is H or phenyl;
- X is H, Br, Cl, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, carboxyalkyl of 1 to 4 carbon atoms, CF.sub.3 or CN;
- and
- n is 1, 2 or 3.
4 more elements
Dependencies are inferred from the claim text.