Aqueous dispersions of acicular titanium dioxide
US5068056A · kind A · utility
50Cited by
4References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 1, 1989 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Dec 1, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/60
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.