Silicas
US5637636A · kind A · utility
12Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1995 |
| Grant date | Jun 10, 1997 |
| Priority date | — |
| Expiry date | Jun 15, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An amorphous silica has a pore size distribution wherein 90% of the pores have a diameter above 15 nanometers, and less than 20% of the pore volume is in pores having a pore diameter between 10 and 20 nanometers, the amorphous silica having a CTAB surface area of less than 100 m.sup.2 /g, the amorphous silica having a matting efficiency of below 20 gloss units at an incidence angle of 60.degree. and a loading of 5% by weight. It can be prepared by a precipitation route. It is used in thixotropic paints and lacquers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.