Method for conditioning organic pigments
AssigneesBayer Aktiengesellschaft, E.I. duPont de Nemours and Company
InventorsMICHAEL J. GREENE, Patrick F. McIntyre, James G. King, Gregory R. Schulz, Karyn B. Visscher
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Abstract
This invention relates to a process for preparing conditioned organic pigments by (a) milling a mixture comprising: (1) one or more crude organic pigments; (2) at least about 0.1% by weight, relative to the organic pigment, of one or more acrylic copolymer dispersants; and (3) 0 to about 100 parts by weight, relative to the organic pigment, of a milling liquid in which the organic pigment is substantially insoluble; and (b) isolating the milled organic pigment.
Claims18
A process for preparing conditioned organic pigments comprising
- (a) milling a mixture comprising:
- (1) one or more crude organic pigments;
- (2) at least about 0.1% by weight, relative to the organic pigment, of one or more acrylic copolymer dispersants;
- and
- (3) 0 to about 100 parts by weight, relative to the organic pigment, of a milling liquid in which the organic pigment is substantially insoluble;
- and
- (b) isolating the milled organic pigment.
Dependencies are inferred from the claim text.