Microporous high structure precipitated silicas and methods
US5647903A · kind A · utility
16Cited by
8References
17Claims
0Family size
Inventors
Key dates
| Filing date | Oct 3, 1995 |
| Grant date | Jul 15, 1997 |
| Priority date | — |
| Expiry date | Oct 3, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/82
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Precipitated silicas having wet cake moisture values in excess of 85%, BET surface areas of 600-700 m.sup.2 /g, oil absorption values of 50 to 60 cc/100 g, total intruded volume of about 1.2 to 0.8 cc/g, and a median pore radius of 50 .ANG. to 20 .ANG. are produced by a low temperature silica precipitation process. The silicas have unique flatting characteristics and are additionally useful as conditioning agents for food and salt and in dentifrice compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.