Millennium Inorganic Chemicals, Inc.

Cristal USA, Inc.

Millennium Inorganic Chemical, Inc.

Robert McIntyre

Guoyi Fu

Michael Hiew

Brian Tear

Billiejo M Monk

Les Hamor

Yarw-Nan Wang

John Stratton

Graham Goodwin

An improved composition capable of forming a translucent coating on a construction material surface comprising at least:

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A method of preparing stable, transparent photocatalytic titanium dioxide sots is disclosed which involves thermal treatment of a suspension of amorphous titanium dioxide in the presence of certain alpha-hydroxy acids. The sots comprise titanium dioxide particles in the anatase form having a crystallite size less than about 10 nm and exhibit excellent stability and transparency at basic, neutral, and acid pH.

Transparent, stable titanium dioxide sols

A method of preparing stable, transparent photocatalytic titanium dioxide sols is disclosed which involves thermal treatment of a suspension of amorphous titanium dioxide in the presence of certain alpha-hydroxy acids. The sots comprise titanium dioxide particles in the anatase form having a crystallite size less than about 10 nm and exhibit excellent stability and transparency at basic, neutral, and acid pH.

Titanium dioxide pigments having improved gloss and durability are disclosed. These pigments are prepared by continuous processes, where pH, temperature, and addition times of hydrous silica and alumina coatings are carefully controlled.

Continuous processes for producing titanium dioxide pigments

The present invention provides methods of preparing a titanium dioxide pigment having improved gloss properties which involves heating an aqueous slurry of base titanium dioxide pigment to a temperature below about 75&deg; C., coating the base titanium dioxide pigment with a silica compound at a temperature below about 75&deg; C. to form a silica coated titanium dioxide pigment; and coating the silica coated titanium dioxide pigment with an alumina compound at a temperature below about 75&deg; C. to form the titanium dioxide pigment having improved gloss.

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Highfields, United Kingdom

Robert McIntyre