Process for aqueous milling of quinacridone pigments

Details Process for aqueous milling of quinacridone pigments Process for aqueous milling of quinacridone pigments

2006-10-17

2006-10-17

Green, Anthony J. (Department: 1755)

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

C106S410000, C106S411000, C106S412000, C106S413000, C106S494000, C106S495000, C106S496000, C106S497000, C106S498000, C106S499000, C524S090000, C546S049000

Reexamination Certificate

active

07122081

ABSTRACT:
The present invention is directed to an aqueous process for reducing particle size of organic pigments by milling the crude pigment in the presence of a water soluble styrene copolymer dispersant, optionally a defoamer, optionally an additive, and greater than about 10 wt. % water, and isolating the organic pigment.

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English language abstract for JP 55089366 (Jul. 1980).
R. B. McKay, JOCCA, “Control of the Application Performance of Classical Organic Pigments”, pp. 89-93, (1989) (no month).

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