Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1996-09-24
1998-03-24
Bell, Mark L.
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106436, 106437, 106438, 106442, 423610, C09C 136
Patent
active
057307954
ABSTRACT:
This invention provides a process for making titanium dioxide pigment, wherein an aqueous slurry of hydrous oxide surface-treated TiO.sub.2 particles is subjected to media milling. The TiO.sub.2 particles are surface-treated with a coating comprising a hydrous oxide such as silica and/or alumina, and the slurry is filtered prior to media milling. The milled slurry is dried and the dried product is fluid-energy milled to produce TiO.sub.2 pigment having good particle size distribution. The TiO.sub.2 pigments may be used to make coating formulations having high gloss.
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Bell Mark L.
E. I. Du Pont de Nemours and Company
Hertzog Scott L.
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