发明名称 |
Method for producing non-porous core-porous shell silica |
摘要 |
A core-shell silica having a high sphericity and a narrow particle distribution and a method for easily producing the core-shell silica which includes dispersing substantially non-porous silica core particles having a sphericity of at least 0.8 and a coefficient of variation of at most 0.2 in a dispersion medium containing an alcohol and water in the presence of a surfactant to prepare a dispersion; adding a silica material to the dispersion and reacting the silica material under a condition of pH of from 8 to 13 to form a shell precursor containing silica and the surfactant on the surface of each silica core particle; and removing the surfactant from the shell precursor to form a porous shell.
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申请公布号 |
US7976812(B2) |
申请公布日期 |
2011.07.12 |
申请号 |
US20080250745 |
申请日期 |
2008.10.14 |
申请人 |
ASAHI GLASS COMPANY, LIMITED |
发明人 |
YAMADA KENJI;YAMADA KAZUHIKO |
分类号 |
C01B33/113;B05D7/00;B32B5/16;C01B33/141 |
主分类号 |
C01B33/113 |
代理机构 |
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