Post-treated titanium dioxide and process for producing same

Details Post-treated titanium dioxide and process for producing same Post-treated titanium dioxide and process for producing same

C - Chemistry, Metallurgy

09

C

6/207

C09C 1/36 (2006.01)

Patent

CA 1153156

TITLE: POST-TREATED TITANIUM DIOXIDE AND PROCESS FOR PRODUCING SAME ABSTRACT: ___ _ This invention concerns a new product consisting of TiO2 particles having pigmentary granulometric and, morphological characteristics. It includes a chemically reactive coating con- sisting of a mixture of oxides and oxychlorides selected from the group consisting of A12O3 and AlOCl; SiO2 and SiOC12; and ZrO2 and zrOC12. The particles of reactive TiO2 product are preparedas follows: the surface Gf the Tio2 particles is activated by thermally treating the particles in a moving bed with an anhy- drc,us gas at 400°-600°C. The particles are then made to react in a moving bed at 350°C to 600°C, in the presence of a carrier gas, with an i.norganic chloride selected from the group con- sisting of AlCl3, SiC14 and ZrC14. This new product is useful, for instance, in TiO2 pigments coated with organic molecules which provide an affinity for the vehicles of paints.

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