Titanium dioxide particles having substantially discrete inorganic particles dispersed on their surfaces
US5886069A · kind A · utility
49Cited by
19References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 1997 |
| Grant date | Mar 23, 1999 |
| Priority date | — |
| Expiry date | May 8, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K9/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to TiO.sub.2 pigments having TiO.sub.2 particles with substantially discrete inorganic particles dispersed on the surfaces of the TiO.sub.2 particles. Suitable inorganic particles include silica, calcium carbonate, and mixtures thereof. The substantially discrete inorganic particles have an average diameter size within the range of about 5 to about 50 nm and are dispersed on the surfaces of the TiO.sub.2 particles in an amount of less than 20 wt. % based on total pigment weight. This invention also includes coating compositions containing these pigments and processes for making these pigments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.