Method for making a photodurable aqueous titanium dioxide pigmen

Details Method for making a photodurable aqueous titanium dioxide pigmen Method for making a photodurable aqueous titanium dioxide pigmen

1997-05-14

1998-10-20

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

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

106436, 106443, 106445, 428403, C09C 136

Patent

active

058241450

ABSTRACT:
This invention relates to a new method for making a photodurable, aqueous titanium dioxide (TiO.sub.2) pigment slurry. The method involves mixing amorphous alumina, TiO.sub.2 pigment particles, water, and at least one dispersant to form the slurry. The initial slurry comprises at least about 78 wt. % TiO.sub.2 solids and at least about 3 wt. % alumina. The resulting slurry may be diluted to a lower TiO.sub.2 solids content and subsequently screened and media-milled. The titanium dioxide pigment slurry is suitable for use in coatings formulations such as paints.

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patent: 5356470 (1994-10-01), Ott et al.
patent: 5554216 (1996-09-01), Baidins et al.
W.H.Daiger and W.H.Madson, Chalk-Fade Evaluation of Pigmented Finishes by Use of Instrumentation and Computer Analysis, Journal of Paint Technology, vol. 39, No. 510, 399-410, Jul., 1967.

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