Layered composite pigments and method of making same

Details Layered composite pigments and method of making same Layered composite pigments and method of making same

1992-02-12

1994-09-06

Group, Karl

Compositions: coating or plastic

Materials or ingredients

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

106 20R, 106437, 106442, 106446, 162162, 1621818, 501141, 501144, 501148, 523400, C04B 1410

Patent

active

053444876

ABSTRACT:
Composite pigments and processes for making the same, useful as partial or total replacement for pigments conventionally employed in paper, paper coatings, paint, ink, and in rubber, are disclosed. The composite pigments comprise one or more synthetic or natural core particles having adsorbed on the surface thereof a polymeric dispersant having a positive or negative charge, and one or more natural or synthetic co-particles having adsorbed on the surface thereof a polymeric dispersant having a positive or negative charge opposite the charge of the core particles. The composite pigments provide improved optical and other properties.

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