发明授权
- 专利标题: Hydrous silica gel containing dentifrice
- 专利标题(中): 含有硅胶的含水硅胶
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申请号: US909149申请日: 1978-05-24
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公开(公告)号: US4303641A公开(公告)日: 1981-12-01
- 发明人: Robert B. DeWolf, II , Rimantas Glemza
- 申请人: Robert B. DeWolf, II , Rimantas Glemza
- 申请人地址: NY New York
- 专利权人: W. R. Grace & Co.
- 当前专利权人: W. R. Grace & Co.
- 当前专利权人地址: NY New York
- 主分类号: C01B33/157
- IPC分类号: C01B33/157 ; A61K8/00 ; A61K8/25 ; A61Q11/00 ; B65D5/46 ; B65D5/475 ; B65D5/62 ; B65D5/64 ; A61K7/16
摘要:
Dentifrice compositions containing a hydrous silica gel having a water content of from about 20 to about 60 weight percent are disclosed. The abrasiveness of the gel is increased by contacting the gel with an alkaline medium to provide a gel pH of about 6 to about 10 and/or preparing the gel by drying and grinding a silica hydrogel that has been washed with an aqueous acidic solution having a temperature of from about 80.degree. to about 100.degree. F.