Layered composite pigments and method of making same
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United States of America Patent
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-
Sep 6, 1994
Grant Date -
N/A
app pub date -
Feb 12, 1992
filing date -
Feb 12, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
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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Cited Art Landscape
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