Continuous wet treatment process to prepare durable, high gloss titanium dioxide pigment
US5993533A · kind A · utility
21Cited by
2References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Jul 2, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/90
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process is provided to prepare durable, high gloss titanium dioxide pigments by a continuous wet treatment process which involves curing of a silica coating at pH of between 7.0 and 8.5. Pigment prepared in this fashion is substantially free from Al(OH).sub.3 impurities and has excellent performance properties in high quality latex paint formulations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.