Process for preparing high-whiteness hydrophobic precipitated silica with ultralow moisture absorption

A hydrophobic precipitated silica is prepared by a process comprising: a) preparing a mixture of an organopolysiloxane derivative and a precipitated silica; b) conditioning the mixture obtained at a temperature ranging from 10 to 150° C. for a period ranging from 0.5 to 72 h, and c) conducting oxida...

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Bibliographische Detailangaben
Hauptverfasser:	OBLADEN HELGA, MEIER KARL, SCHMOLL RALF, PANZ CHRISTIAN, STOFFELS RALF
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS COMPOUNDS THEREOF DYES INORGANIC CHEMISTRY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-METALLIC ELEMENTS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PERFORMING OPERATIONS POLISHES PREPARATION OF CARBON BLACK PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING 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
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Beschreibung
Zusammenfassung:	A hydrophobic precipitated silica is prepared by a process comprising: a) preparing a mixture of an organopolysiloxane derivative and a precipitated silica; b) conditioning the mixture obtained at a temperature ranging from 10 to 150° C. for a period ranging from 0.5 to 72 h, and c) conducting oxidative heat treatment under fluid conditions at a temperature more than 300° C. with an oxidizing gas.