Method of hydrophobing silica

Details Method of hydrophobing silica Method of hydrophobing silica

1990-05-31

1991-03-19

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524588, 106490, 428404, C08K 334

Patent

active

050011839

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.

REFERENCES:
patent: 4504621 (1985-03-01), Lefler, III
patent: 4954565 (1990-09-01), Liles
patent: 4957963 (1990-09-01), Burns et al.
patent: 4962153 (1990-10-01), Liles

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