发明名称 |
Hydrous silica gel containing dentifrice |
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 DEG to about 100 DEG F.
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申请公布号 |
US4303641(A) |
申请公布日期 |
1981.12.01 |
申请号 |
US19780909149 |
申请日期 |
1978.05.24 |
申请人 |
W. R. GRACE & CO. |
发明人 |
DEWOLF, II, ROBERT B.;GLEMZA, RIMANTAS |
分类号 |
C01B33/157;A61K8/00;A61K8/25;A61Q11/00;(IPC1-7):A61K7/16 |
主分类号 |
C01B33/157 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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