| 摘要 |
PCT No. PCT/FR94/01543 Sec. 371 Date Jul. 31, 1996 Sec. 102(e) Date Jul. 31, 1996 PCT Filed Dec. 28, 1994 PCT Pub. No. WO95/18066 PCT Pub. Date Jul. 6, 1995The present invention relates to silicas, in particular precipitated silicas, which can be used in particular as abrasive agents in toothpaste compositions. The silicas according to the invention have, first of all, low specific surfaces. Their BET specific surface is between 20 and 75 m2/g, preferably between 35 and 64 m2/g. The invention also relates to a process for their preparation and to the toothpaste compositions containing them. |
