Title:
【発明の名称】疎水性シリカゲルを中性条件下で製造する方法
Document Type and Number:
Japanese Patent JP2001516323
Kind Code:
A
Abstract:
The present invention is hydrophobic silica gels and a method for their preparation under neutral conditions. The method comprises two steps, where in the first step the pH of a silica hydrosol is adjusted with a base to within a range of about pH 3 to pH 7 to facilitate formation of a silica hydrogel. In the second step the silica hydrogel is contacted with an organosilicon compound in the presence of a catalytic amount of a strong acid to effect hydrophobing of the silica hydrogel. In a preferred method, in a third step the hydrophobic silica gel is contacted with a sufficient quantity of a water-immiscible organic solvent to convert the hydrophobic silica hydrogel into a hydrophobic silica organogel.
Inventors:
Burns, Gary, Tee.
Din, quinn
Hahn, James, Earl.
Reese, Clifford, Sea.
Din, quinn
Hahn, James, Earl.
Reese, Clifford, Sea.
Application Number:
JP53684598A
Publication Date:
September 25, 2001
Filing Date:
February 18, 1998
Export Citation:
Assignee:
Dow Corning Corporation
International Classes:
C01B33/159; C08K9/06; C09C1/28; C09C3/12; (IPC1-7): C01B33/159; C09C1/28; C09C3/12
Attorney, Agent or Firm:
Akira Asamura (3 outside)