Printing inks containing nucleated organic pigments
AssigneeSun Chemical Corporation
InventorsMark U. Johnson, Jules Rothmayer, Hugh M. Smith
Life of this patent
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Abstract
Substitutes for inorganic pigments that are particularly suitable for use in printing inks comprise nucleated organic pigments prepared by reacting in aqueous solution primary aryl amines with at least one coupling component in the presence of a conditioned, highly dispersed inorganic material.
Claims17
A printing ink wherein the pigment is a nucleated azo pigment prepared by reacting in aqueous solution (a) a compound having the formula ##STR2## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 may be the same or different and each may be H, CH.sub.3, or OCH.sub.3, (b) at least one other primary aryl amine, and (c) at least one coupling agent in the presence of (d) a dispersed inorganic material.
A pigment prepared by reacting in aqueous solution (a) a compound having the formula ##STR3## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 may be the same or different and each may be H, CH.sub.3, or OCH.sub.3, (b) at least one other primary aryl amine, and (c) at least one coupling agent in the presence of (d) a dispersed inorganic material.
Dependencies are inferred from the claim text.