Aqueous colloidal dispersion of fumed silica without a...

Details Aqueous colloidal dispersion of fumed silica without a... Aqueous colloidal dispersion of fumed silica without a...

B - Operations, Transporting

01

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134/55

B01F 17/54 (2006.01) C01B 33/14 (2006.01) C01B 33/141 (2006.01) C03C 1/00 (2006.01)

Patent

CA 2012718

A stable, non-dilatant, low viscosity, filter- able, aqueous colloidal dispersion of fumed silica, without an alkali or stabilizer, having a fumed silica concentration of at least about 35% by weight, is disclosed. Such an aqueous colloidal dispersion of fumed silica is produced by admixing fumed silica with water in a mixer in an amount such that the fumed silica concentra- tion by weight exceeds the amount of fumed silica desired in the final dispersion and then diluting the mixture with an additional amount of water such that the resulting aqueous colloidal dis- persion contains the desired concentration of fumed silica. The mixture may optionally be filtered to remove grit and agglomerates.

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