PRECIPITATED SILICA USED AS REINFORCING FILLER FOR ELASTOMERS

PRECIPITATED SILICA USED AS REINFORCING FILLER FOR ELASTOMERS

The invention relates to a novel process for the preparation of precipitated silica which can be used as a reinforcing filler for elastomers. The invention also relates to novel precipitated silicas in the form of powder, granules or, preferably, substantially spherical beads, these silicas being ch...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: FOURRE PATRICK, COCHET PHILIPPE, CHEVALLIER YVONICK
Format: Patent
Sprache:eng
Schlagworte:
ADHESIVES
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOUNDS THEREOF
DYES
INORGANIC CHEMISTRY
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
NON-METALLIC ELEMENTS
ORGANIC MACROMOLECULAR COMPOUNDS
PAINTS
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
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Beschreibung
Zusammenfassung:The invention relates to a novel process for the preparation of precipitated silica which can be used as a reinforcing filler for elastomers. The invention also relates to novel precipitated silicas in the form of powder, granules or, preferably, substantially spherical beads, these silicas being characterized in that they have a BET specific surface of between 185 and 250 m2/g, a CTAB specific surface of between 180 and 240 m2/g, and a pore distribution such that the pore volume V2 made up of the pores with a diameter of between 175 and 275 represents less than 50% of the pore volume V1 made up of the pores with diameters of less than or equal to 400 , a pore volume (Vd1), made up of the pores with a diameter of less than 1 μm, of greater than 1.65 cm3/g, a fineness value (F.V.) of between 70 and 100 , and a content of fines (τf), after deagglomerability with ultrasound, of at least 50%.