High-whiteness hydrophobic precipitated silica with ultralow moisture absorption
US7220449B2 · kind B2 · utility
14Cited by
12References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2005 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | Mar 26, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2200/0247
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to hydrophobicized precipitated silicas that possess an extremely high whiteness and extremely low moisture absorption. The hydrophobic precipitated silicas are prepared, inter alia, by coating with silicone oil and oxidative heat treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.