Method for chemical surface modification of fumed silica particl

Details Method for chemical surface modification of fumed silica particl Method for chemical surface modification of fumed silica particl

1997-10-17

1999-05-11

Lusignan, Michael

Coating processes

Particles, flakes, or granules coated or encapsulated

Inorganic base

423335, 423336, 423337, B05D7/00

Patent

active

059026367

ABSTRACT:
Dehydroxylated, silica-containing, glass surfaces are known to be at least partially terminated by strained siloxane rings. According to the invention, a surface of this kind is exposed to a selected silane compound or mixture of silane compounds under reaction-promoting conditions. The ensuing reaction results in opening of the strained siloxane rings, and termination of surface atoms by chemical species, such as organic or organosilicon species, having desirable properties. These species can be chosen to provide qualities such as hydrophobicity, or improved coupling to a polymeric coating.

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