Method of hydrophobing silica

Details Method of hydrophobing silica Method of hydrophobing silica

C - Chemistry, Metallurgy

01

B

134/51, 400/7224

C01B 33/146 (2006.01) C01B 33/149 (2006.01) C08K 9/06 (2006.01) C08K 9/08 (2006.01) C09C 1/30 (2006.01)

Patent

CA 1313104

METHOD OF HYDROPHOBING SILICA Abstract A method of producing hydrophobic colloidal silica is disclosed. The method comprises combining an aqueous colloidal silica dispersion, polyorganosiloxane, and anionic surfactant to yield a stable aqueous emulsion of hydrophobic colloidal silica. The emulsion may be further processed by evaporating the water to yield a white material which may be easily ground to a fine powder of hydrophobic colloidal silica. This powder is useful as a reinforcement for silicone rubber.

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