Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1994-02-17
1995-09-12
Bell, Mark L.
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106464, 106465, C09C 102
Patent
active
054494028
ABSTRACT:
A functionally modified pigment particle is prepared by mixing a flocculated pigment of kaolin clay or calcium carbonate with a modifier having charge sites opposite in sign to the charge sites of the flocculated pigment. Preferably, the flocculated pigment is an aqueous suspension of filter cake particles. The suspension is non-dispersed, or partially dispersed by neutralization with a strong base such as sodium carbonate. The suspension has a pH in the range of 6-9. Preferred modifiers are a water insoluble or dispersible latex binder, a water or alkali soluble organic or inorganic polymeric binder, a non-film forming organic particle such as plastic pigment, an optical brightener, a fluorocarbon, or combination thereof. When mixed with the filter cake, the modifiers become electrostatically bound to the pigment particles.
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Bell Mark L.
Hertzog Scott L.
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