High concentration colloidal dispersion of a cerium compound and

Details High concentration colloidal dispersion of a cerium compound and High concentration colloidal dispersion of a cerium compound and

1995-09-12

1998-03-31

Lovering, Richard D.

Compositions: coating or plastic

Coating or plastic compositions

Corrosion inhibiting coating composition

2523131, 252314, 423DIG14, B01J 1300, C23F 1100

Patent

active

057333610

ABSTRACT:
In a first embodiment, the present invention concerns a colloidal dispersion of a cerium compound, characterised in that it has a CeO.sub.2 concentration of between 500 and 700 g/l and a conductivity of at most 50 mS/cm. In a second embodiment, the colloidal dispersion is characterised in that it has a CeO.sub.2 concentration of more than 700 g/l.
A process for the preparation of the dispersion of the invention is characterised in that a starting suspension or dispersion is treated by dialysis or with a cationic resin and an anionic resin.
Colloidal dispersions of the invention can be used in automobile post combustion catalysis, in cosmetics, in lubrication, in ceramics or as an anticorrosion agent.

REFERENCES:
patent: 3024199 (1962-03-01), Pasfield
patent: 4231893 (1980-11-01), Woodhead
patent: 4356106 (1982-10-01), Woodhead et al.
patent: 4699732 (1987-10-01), Woodhead
patent: 5021192 (1991-06-01), David et al.
patent: 5132048 (1992-07-01), Picard-Seon et al.
patent: 5376305 (1994-12-01), Chane-Ching et al.
Weiser, H.B., The Hydrous Oxides, First Edition, McGraw-Hill Book Co., Inc., New York (1926) pp. 254-258.

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