Azo lake pigments

Details Azo lake pigments Azo lake pigments

1987-08-21

1988-08-30

Higel, Floyd D.

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

Organic compounds

Azo

8641, 106 23, 106402, 106496, 534581, 534738, 534742, 534746, 534747, 534863, 534864, 534874, C09B 6300, C09D 500, C09D 1102

Patent

active

047678445

ABSTRACT:
An azo lake pigment is obtained by coupling an aromatic diazo component having a sulfonic acid group with a mixture of 2-hydroxy-3-naphthoic acid and a 2-hydroxy-3-naphthoic acid derivative represented by formula [I] ##STR1## wherein R represents a hydrogen atom, a naphthalene residue, a cyclohexyl group, or a group of the formula ##STR2## in which each of X, Y and Z represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, an acetylamino group, a benzoylamino group, a carbomoyl group or a phenylcarbamoyl group, and X and Y together may form a cyclized benzimidazolone, benzthiazole or benzoxazole group,
and laking the resulting dye with an alkaline earth metal salt or a manganese salt.

REFERENCES:
patent: 4217273 (1980-08-01), Von
patent: 4530724 (1985-07-01), Ueno et al.

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