Readily dispersible TiO.sub.2 pigment

Details Readily dispersible TiO.sub.2 pigment Readily dispersible TiO.sub.2 pigment

1980-11-03

1982-08-17

Dees, Carl F.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106308Q, C09C 132, C09C 300

Patent

active

043447996

ABSTRACT:
An inorganically after-treated TiO.sub.2 pigment with a coating of hydrophobicizing and hydrophilicizing organic substances, which pigment comprises more than about 95% by weight of TiO.sub.2, shows a loss on annealing of less than about 0.8% (after subtraction of the carbon content) and has a grindometer value smaller than about 30, corresponding to a value of more than about 5.6 on the Hegman scale, is produced by micronizing a mixture of an inorganically after-treated TiO.sub.2 pigment, an untreated TiO.sub.2 pigment and hydrophobicizing and hydrophilicizing organic substances, the after-treated pigment being employed in about 1 to 40% by weight of total TiO.sub.2 pigment and the hydrophobicing and hydrophilicizing substances being employed in about 0.3 to 5% by weight of TiO.sub.2 pigment. The pigments are readily dispersible which simplifies their use in pigmenting lacquers, plastics and paper.

REFERENCES:
patent: 3025179 (1962-03-01), Holbein
patent: 3647495 (1972-03-01), Cline
patent: 3808023 (1974-03-01), Whitehead et al.

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