发明名称 |
HYDROPHOBIC ORGANOSILICATE-MODIFIED SILICA GELS |
摘要 |
The present invention is hydrophobic organosilicate-modified silica gels and a method for their preparation. The method comprises two steps, where in the first step an organosilicate-modified silica hydrosol is heat treated in the presence of a strong mineral acid at a pH less than pH 1 to form an organosilicate-modified silica hydrogel. In the second step, the organosilicate-modified silica hydrogel is contacted with an organosilicon compound in the presence of a catalytic amount of a strong acid to effect hydrophobing of the organosilicate-modified silica hydrogel thereby forming a hydrophobic organosilicate-modified silica hydrogel having a surface area within a range of 100 m2/g to 750 m2/g as measured in the dry state. In a preferred method, the hydrophobic organosilicate-modified silica gel is contacted with a sufficient quantity of a water-immiscible organic solvent to convert the hydrophobic organosilicate-modified silica hydrogel into a hydrophobic organosilicate-modified silica organogel.
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申请公布号 |
CA2279296(A1) |
申请公布日期 |
1998.08.27 |
申请号 |
CA19982279296 |
申请日期 |
1998.02.18 |
申请人 |
DOW CORNING CORPORATION |
发明人 |
BURNS, GARY T.;REESE, CLIFFORD C.;HAHN, JAMES R. |
分类号 |
C01B33/159;C08K9/06;C09C1/30;C09C3/12;(IPC1-7):C01B33/16 |
主分类号 |
C01B33/159 |
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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