Pigmentary compositions,their preparation and their applications to the colouration in bulk of cellulose esters

Abstract

Abstract PIGMENTARY COMPOSITION COMPRISING: (A) AT LEAST ONE COLOURING MATTER INSOLUBLE IN WATER AND IN THE ORGANIC SOLVENTS USED FOR SPINNING FIBRES BASED ON CELLULOSIC ESTERS, (B) A NON-IONIC SURFACE-ACTIVE SUBSTANCE INSOLUBLE IN WATER, BUT SOLUBLE IN THE ORGANIC SOLVENTS USED FOR SPINNING FIBRES BASED ON CELLULOSIC ESTERS, IN AN AMOUNT B OF BTWEEN 1% AND 10% INCLUSIVE, OF THE WEIGHT (A) OF THE COLURING MATTER, AND (C) A CELLULOSIC ESTER IN AN AMOUNT C SUCH THAT THE RATIO IS BETWEEN 20 AND 95 INCLUSIVE. THE PIGMENTARY COMPOSITION MAY BE PREPARED BY A PROCESS WHEREIN (A) ON THE ONE HAND ZINC CHLORIDE, AND ON THE OTHER HAND A CELLULOSIC ESTER, ARE INTRODUCED INTO AN AQUEOUS DISPERSION OF THE WATER-INSOLUBLE COLOURING MATTER AND THE NON-IONIC SURFACE-ACTIVE SUBSTANCE, THE AMOUNTS OF COLOURING MATTER (A), WATER (A''), NON-IONIC SURFACE-ACTIVE SUBSTANCE (B), CELLULOSIC ESTER (C) AND ZINC CHLORIDE (D) USED BEING SUCH THAT THE FOLLOWING RELATIONS ARE SATISFIED: THEN (B) THE MIXTURE IS DILUTED WIH WATER UNTIL RATIO: BECOMES EQUAL TO OR LESS THAN 0.4,AND (C) THE PRECIPITATE THUS OBTAINED IS ISOLATED. THE PIGMENTARY COMPOSITION IS USEFUL FOR THE COLOURATION OF BULK CELLULOSIC ESTERS. THE PRESENT INVENTION CONCERS, PIGMENTARY COMPOSITIONS, THEIR PREPARATION AND THEIR APPLICATIONS TO THE COLOURATION IN BULK OF CELLULOSIC ESTERS.

Inventors

• 👤 F Manier

Bibliographic Details