Pyrogenically prepared silicon dioxide compacted to give crusts

Details Pyrogenically prepared silicon dioxide compacted to give crusts Pyrogenically prepared silicon dioxide compacted to give crusts

C - Chemistry, Metallurgy

01

B

C01B 33/12 (2006.01) C08K 3/36 (2006.01) C09C 1/30 (2006.01) C09C 3/04 (2006.01)

Patent

CA 2640006

Pyrogenically prepared silicon dioxide is compacted to give crusts, in that it is subject to preliminary de- aeration, and is compacted to give crusts, and the crusts are broken and, if appropriate, classified. The tamped bulk density (to DIN EN ISO 787-11) of the silicon dioxide compacted to give crusts is from 185 to 700 g/1. It can be used as filler in rubber mixtures.

Le procédé selon l'invention consiste à compacter du dioxyde de silicium préparé par pyrogénation pour produire des croûtes, en le soumettant à un désaérage antérieur, puis en le compactant pour produire des croûtes, puis à rompre ces dernières, et si nécessaire, à les classer. La masse volumétrique tassée (à DIN EN ISO 787-11) du dioxyde de silicium compacté destiné à produire des croûtes est comprise entre 185 et 700 g/1. Ledit produit peut être utilisé comme mastic dans des mélanges de caoutchouc.

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