Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1997-07-03
1998-10-20
Bell, Mark L.
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106436, 106437, 106443, 106445, C09C 136
Patent
active
058241469
ABSTRACT:
This invention relates to a new method for making a photodurable, aqueous titanium dioxide (TiO.sub.2) pigment slurry. This method involves reacting titanium tetrachloride, aluminum chloride and an oxygen-containing gas in the presence of a nucleant in the vapor phase to produce TiO.sub.2 pigment. A sufficient amount of aluminum chloride is added to provide at least 2 wt. % alumina in the TiO.sub.2 pigment. The TiO.sub.2 pigment is separated from the reaction gases; and mixed with sufficient water to produce a TiO.sub.2 slurry comprising at least 78 wt. % TiO.sub.2 solids. The slurry may be used in coating formulations such as paints.
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Bell Mark L.
E. I. Du Pont de Nemours and Company
Hertzog Scott L.
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