Methods for producing titanium dioxide pigments having improved gloss at low temperatures
US6395081B1 · kind B1 · utility
9Cited by
10References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2000 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Nov 3, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/90
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
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° C., coating the base titanium dioxide pigment with a silica compound at a temperature below about 75° 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° C. to form the titanium dioxide pigment having improved gloss.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.