Azo pigment composition containing a laked Azo pigment and fortified latex
AssigneeInmont Corporation
InventorByron G. Hays
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Abstract
Novel red azo pigment--fortified latex compositions for use in printing inks. The novel pigment compositions have superior burn-out resistance and color strength. The novel pigment compositions are made by coupling orthanilic acid derivatives (including optionally, disulfonated amine derivatives) with B-napthal precipitating the metal salts and mixing with fortified latex dispersions. The fortified latex dispersion comprises a dispersed polymer phase in a dissolved polymer phase. The dispersed polymer is preferably a high molecular weight copolymer while the soluble polymer is preferably a low molecular weight acrylic copolymer containing carboxyl group functionality. The novel pigment compositions have superior color strength.
Claims11
An azo pigment composition comprising:
- about 72.0 wt. percent to about 99.0 wt. percent of a laked azo pigment selected from the group consisting of:
- ##STR6## wherein M is a cation selected from the group consisting of barium, calcium, magnesium, and manganese;
- about 1.0 wt. percent to about 20.0 wt. percent of a fortified latex characterized by the presence of distinct dispersed and soluble polymer phases.
Dependencies are inferred from the claim text.