Process for converting premilled quinacridone to pigmentary form

Details Process for converting premilled quinacridone to pigmentary form Process for converting premilled quinacridone to pigmentary form

1976-12-01

1978-06-13

Douglas, Winston A.

Compositions: coating or plastic

Materials or ingredients

106308Q, 106309, C09B 4800

Patent

active

040946991

ABSTRACT:
Process for converting premilled quinacridone to pigmentary form by contacting the premilled quinacridone with an aqueous alkaline medium in the presence of at least one surfactant. The process eliminates the need for salt in the premilling operation and eliminates the use of organic liquids in the premilling or aftertreatment of the premilled quinacridone.

REFERENCES:
patent: 3016384 (1962-01-01), Caliezi
patent: 3017414 (1962-01-01), Minnich et al.
patent: 3752688 (1973-08-01), Fuchs et al.

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