二氧化硅
申请公布号:CN1040200C
申请号:CN93120734.7
申请日期:1993.10.28
申请公布日期:1998.10.14
发明人:A·阿尔克罗夫特;P·W·施坦尼埃
分类号:C01B33/187;C01B33/193;A61K7/16
主分类号:C01B33/187
代理人:吴大建
地址:荷兰鹿特丹
摘要:通过沉淀法制备适合作透明牙膏磨料的无定型二氧化硅。这些二氧化硅具有BET表面积为10—90m<SUP>2</SUP>/g、重量平均粒径为5—15微米和塑料磨耗值为16—26、RI范围从1.430—1.443时至少70%的透明度和油吸附范围约70—约150cm<SUP>2</SUP>/100g。
主权项:1.一种无定型二氧化硅,其特征在于该二氧化 硅具有: (i)B.E.T.表面积范围是10-90m<sup>2</sup>g<sup>-1</sup>, (ii)重量平均粒径范围是5-15微米,大于 20微米的重量粒径分布低于15%,而大于25微 米的重量粒径分布则低于5%, (iii)塑料磨耗值范围是16-26, (iv)在折射率为1.430-1.443的情况下透明 度至少为70%, (v)油吸附范围是70-150。
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