Method of preparing treated silica

Details Method of preparing treated silica Method of preparing treated silica

1999-01-13

2000-07-18

Meeks, Timothy

Coating processes

Particles, flakes, or granules coated or encapsulated

Inorganic base

427213, 427220, 427221, B05D 700

Patent

active

060904399

ABSTRACT:
A method of preparing treated silica is described. The method comprises mixing a hydrolyzable silica precursor such as methyltrichlorosilane with water, an acid (e.g., hydrochloric acid) and a hydrophobing agent capable of rendering polar silanol groups hydrophobic, such as trimethylchlorosilane. The treated silica is then recovered from the mixture.
The inventive method provides a number of mechanisms for controlling the physical properties (e.g., particle size, surface area, etc.) of the treated silica. For example, the rate of hydrolysis of the silica precursor, which impacts these physical properties, can be regulated by the nature and concentration of the acid used in the reaction.

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