Modified colored pigments and ink jet inks, inks, and coatings c

Details Modified colored pigments and ink jet inks, inks, and coatings c Modified colored pigments and ink jet inks, inks, and coatings c

1997-06-09

1999-07-13

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Marking

106 3175, 106 3186, 106476, 106499, C09D 1102

Patent

active

059221186

ABSTRACT:
A modified colored pigment is described which comprises colored pigment having attached at least one organic group. The organic group comprises a) at least one aromatic group or a C.sub.1 -C.sub.12 alkyl group and b) at least one ionic group, at least one ionizable group, or a mixture of an ionic group and an ionizable group. The aromatic group or the C.sub.1 -C.sub.12 alkyl group of the organic group is directly attached to the pigment and the organic group is present at a treatment level of from about 0.10 to about 4.0 micromoles/m.sup.2 of the pigment used based on nitrogen surface area of the pigment. Also described are aqueous and non-aqueous inks and coatings and ink jet ink compositions containing the modified colored pigment. A method to increase the flow of an ink is also disclosed as well as a method to improve the waterfastness of a print imaged by an ink composition. Also, other ink jet ink compositions are described which comprise an aqueous or non-aqueous vehicle and a colored pigment having attached an organic group having the formula: Ar--R.sup.1 (I) or Ar'R.sup.3 R.sup.2 (II) wherein Ar is an aromatic group and Ar' is an aromatic group.

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