Titanium dioxide pigment, electrophoretic coating compositions i

Details Titanium dioxide pigment, electrophoretic coating compositions i Titanium dioxide pigment, electrophoretic coating compositions i

1987-07-22

1989-07-11

Niebling, John F.

Compositions: coating or plastic

Materials or ingredients

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

106401, 423610, C09C 136

Patent

active

048468916

ABSTRACT:
A process is disclosed for producing TiO.sub.2 pigment which is substantially improved for use in electrophoretic coating compositions. The process comprises adjusting an aqueous slurry of the pigment to a pH of about 6.5-7.5, maintaining such pH at a temperature and for a time which is sufficient to maintain substantial equilibrium, and washing the pigment. There also is disclosed TiO.sub.2 pigment which is produced by the foregoing process.

REFERENCES:
patent: 2305368 (1942-12-01), Whitten
patent: 3362899 (1968-01-01), Gilchrist
patent: 3575909 (1971-04-01), Gilchrist
patent: 3591478 (1971-07-01), Crickison
patent: 3635819 (1972-01-01), Schurr et al.
patent: 4456514 (1984-06-01), Misawa et al.
Kirk-Othmer Encyclopedia, vol. 23 pp. 139-145, 149, 159-163, 1983.

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