Aqueous dispersions of acicular titanium dioxide

Details Aqueous dispersions of acicular titanium dioxide Aqueous dispersions of acicular titanium dioxide

1989-12-01

1991-11-26

Stoll, Robert L.

Compositions

Preservative agents

Anti-corrosion

2523154, 106436, 106442, B01J 1300

Patent

active

050680560

ABSTRACT:
An aqueous dispersion of acicular fine particle size titanium dioxide containing from 20 to 60% by weight solids content and a polycarboxylic dispersant is of outstanding use in the preparation of sun screens. The dispersions are transparent to visible light and absorbant to UV light of broad spectrum. Usually the titanium dioxide has a largest dimension within the range 0.01 to 0.15 micron.
The dispersions are produced by milling, preferably in a high speed mill, until the required UV absorbancy is attained.

REFERENCES:
patent: 3579310 (1971-05-01), Lewis et al.
patent: 3728443 (1973-04-01), Berisford et al.
patent: 3923968 (1975-12-01), Basque et al.
patent: 4927464 (1990-05-01), Cowie

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