| 摘要 |
Precipitated silica comprising porous silica particles having a cumulativ e surface area for all pores having diameters greater than 500 Å of less tha n 6 m2/g, as measured by mercury intrusion, and a percentage cetylpyridinium chloride (% CPC) Compatibility of greater than about 85%. 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 a ction. Processes for making the silica product including the introduction of sodium sulfate powder during different process steps in order to enhance su ch a compatibility with CPC are provided. |
