Low viscosity-increment fumed-silica and its slurry
AssigneeNippon Aerosil Co., Ltd.
InventorsHitoshi Kobayashi, Masamichi Murota, Hirokuni Shirono
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Abstract
A fumed-silica, which can make a slurry having sufficient wettability to a polar liquid, excellent dispersibility, and low viscosity even in the high concentration, and a slurry thereof. A fumed-silica and its slurry are provided, wherein the water content is controlled so that a weight loss after drying Y, and a dynamic wetting rate to water Z, have specified values.
Claims24
A fumed-silica, wherein the % weight loss after drying at 105° C. for 2 hours, Y, of the fumed-silica satisfies the following formula (i):
- Y≧0.0104X−0.01 (i)
- wherein
- 2.6≦Y≦10 and
- wherein the dynamic wetting rate to water, Z (×10−5N/s), of the fumed-silica satisfies the following formula (ii):
- Z(×10−5 N/s)≧−≧0.0162X+9.2 (ii)
- wherein
- X is the specific surface area of the fumed-silica, wherein X is 50-400 m2/g by the BET method.
A fumed-silica, wherein the weight loss after drying of the fumed-silica is 2.6% or more and less than 10%, and the dynamic wetting rate to water of the fumed-silica is more than 5 (×10−5 N/s).
Dependencies are inferred from the claim text.