초록 ▼

This invention relates to novel pigmentary products, particularly valuable in the textile art, prepared by using strong acid solvents to solubilize or form fine colloidal dispersions of normally water-insoluble aryl pararosanilines in an aqueous medium. The aryl pararosaniline which is thus solubili

This invention relates to novel pigmentary products, particularly valuable in the textile art, prepared by using strong acid solvents to solubilize or form fine colloidal dispersions of normally water-insoluble aryl pararosanilines in an aqueous medium. The aryl pararosaniline which is thus solubilized or dispersed is reacted with a heteropoly acid to produce water-insoluble blue-hued pigments. By various modifications in the process, the pigments can be co-precipitated with other pigments and/or dyes to produce pigments or pigment lakes of different shades and intensities.

대표청구항 ▼

Blue pigments which comprise the reaction product obtained by dissolving and/or dispersing an essentially water-insoluble aryl pararosaniline in an effective amount of at least one acid solvent and reacting with an approximately chemically equivalent amount of at least one heteropoly acid containing

Blue pigments which comprise the reaction product obtained by dissolving and/or dispersing an essentially water-insoluble aryl pararosaniline in an effective amount of at least one acid solvent and reacting with an approximately chemically equivalent amount of at least one heteropoly acid containing molybdenum and/or tungsten; wherein said aryl pararosaniline has the following structure in its carbinol form: [Figure] wherein R1, R2 and R3 are direct linkages, phenyl, or napthyl groups; R4 is hydrogen or methyl; X1, X2 and X3 are hydrogen, halogen, nitro, alkyl of 1 to 4 carbons or alkoxy of 1 to 4 carbons; provided that at least one of R1, R2 and R3 is not a direct linkage and provided that X1, X2 or X3 is hydrogen when the corresponding R1, R2 or R3 is a direct linkage.