Pyrazolone or pyridone type water soluble disazo colorant contai

Details Pyrazolone or pyridone type water soluble disazo colorant contai Pyrazolone or pyridone type water soluble disazo colorant contai

1987-07-09

1989-06-27

Higel, Floyd D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

534617, 534632, 534635, 534636, 534637, 534642, 534631, C09B 6209, C09B 62513, D06P 1382, D06P 1384

Patent

active

048431508

ABSTRACT:
A water soluble disazo colorant represented by formula (I) in the form of free acid: ##STR1## wherein K represents ##STR2## [wherein A represents a methyl group or a carboxylic group; R.sup.2 represents a hydrogen atom, an alkyl group of 1 to 8 carbon atoms, a sulfoalkyl grouop of 1 to 4 carbon atoms, or an alkyl group of 1 to 4 carbon atoms which is substituted by an alkoxy group of 1 to 4 carbon atoms;

REFERENCES:
patent: 3926944 (1975-12-01), Berrie et al.
patent: 4228071 (1980-10-01), Riat et al.
patent: 4645832 (1987-02-01), Niwa et al.
patent: 4670547 (1987-06-01), Lehr

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