Precipitated silica product, dentifrices containing same, and processes
US7255852B2 · kind B2 · utility
39Cited by
14References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2003 |
| Grant date | Aug 14, 2007 |
| Priority date | — |
| Expiry date | Apr 15, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/19
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Precipitated silica comprising porous silica particles having a cumulative surface area for all pores having diameters greater than 500 Å of less than 8 m2/g, as measured by mercury intrusion, and a percentage cetylpyridinium chloride (% CPC) Compatibility of greater than about 55%. The precipitated silica product is especially well-adapted for use in dentifrices containing cetylpyridinium chloride, which do not attach to the low surface area silica product in a meaningful level and thus remain available for antimicrobial action. Processes for making the silica product are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.