Pyrogenic silica having narrow particle size distribution

Silica with the following physical properties is new: (1) a BET surface area of 100-700 m 2>/g; (2) a dibutyl phthalate (DBP) absorption of 100-500 g/100 g (dry basis); (3) a compacted density of 100-250 g/l; (4) an Alpine sieve residue (above 63 Microm) of less than 5%; and (5) a particle size d...

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Bibliographische Detailangaben
Hauptverfasser:	KLASEN, CLAAS-JUERGEN, BARTHEL, THOMAS, MAUS, RALF
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES BLASTING CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOUNDS THEREOF CORRECTING FLUIDS DRYING DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM DYES FILLING PASTES HEATING INKS INORGANIC CHEMISTRY LIGHTING MECHANICAL ENGINEERING METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-METALLIC ELEMENTS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES PREPARATION OF CARBON BLACK THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS USE OF MATERIALS THEREFOR WEAPONS WOODSTAINS
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Beschreibung
Zusammenfassung:	Silica with the following physical properties is new: (1) a BET surface area of 100-700 m 2>/g; (2) a dibutyl phthalate (DBP) absorption of 100-500 g/100 g (dry basis); (3) a compacted density of 100-250 g/l; (4) an Alpine sieve residue (above 63 Microm) of less than 5%; and (5) a particle size distribution such that d 9 5 is less than 40 Microm, d 5 0 is less than 20 Microm and d 5 is less than 10 Microm. An independent claim is also included for a process for producing silica with a particle size distribution as above, comprising drying a silica suspension in a pulse combustion dryer. Die Erfindung betrifft Kieselsäuren mit engen Partikelgrößenverteilungen und Verfahren zu deren Herstellung. Die Kieselsäuren können als Mattierungsmittel oder in Elastomerenmischungen verwendet werden.