JPH0362647B

JPH0362647B

The pyrogenically produced silicon dioxide has an alkaline or weakly acidic pH. It is prepared by treating pyrogenically produced silicon dioxide with the exclusion of air moisture at temperatures of 300 to 500 DEG C with gaseous ammonia. By virtue of its specific pH, the pyrogenically produced sili...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: DETOREEFU KOOTO, DEIITERU SHUTSUTE, MANFUREETO SHUMITSUTO
Format: Patent
Sprache:eng
Schlagworte:
ADHESIVES
AMMONIA
CHEMISTRY
COMPOUNDS THEREOF
CYANOGEN
DYES
INORGANIC CHEMISTRY
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
NON-METALLIC ELEMENTS
PAINTS
POLISHES
PREPARATION OF CARBON BLACK
TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES
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Beschreibung
Zusammenfassung:The pyrogenically produced silicon dioxide has an alkaline or weakly acidic pH. It is prepared by treating pyrogenically produced silicon dioxide with the exclusion of air moisture at temperatures of 300 to 500 DEG C with gaseous ammonia. By virtue of its specific pH, the pyrogenically produced silicon dioxide according to the invention can be used as an additive in acid-sensitive systems.