METHOD FOR PREPARING A MASTERBATCH OF NATURAL RUBBER AND MAGNESIUM-DOPED SILICA

• Main Authors: DE GAUDEMARIS, BENOIT, BERRIOT, JULIEN, LAFFARGUE, GERALDINE
• Format: Patent
• Language: English; French
• Published: 18.04.2013
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; DEVICES OR ARRANGEMENTS RELATED TO TYRES; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TYRE CHANGING OR REPAIRING; TYRE INFLATION; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; VEHICLE TYRES; VEHICLES IN GENERAL; WORKING-UP

The invention relates to a method for preparing a masterbatch of natural rubber and silica, comprising the following successive steps of: doping the silica with magnesium, preparing at least one dispersion of the thus-doped silica in water, bringing into contact and mixing a natural rubber latex and the aqueous dispersion of doped silica in order to obtain a coagulum, recovering the coagulum, and drying the recovered coagulum in order to obtain the masterbatch. L'invention concerne une méthode pour préparer un mélange-maître de caoutchouc naturel et de silice, qui comprend les étapes successives suivantes : - doper la silice avec du magnésium, - préparer au moins une dispersion de la silice ainsi dopée dans de l'eau, - mettre en contact et mélanger un latex de caoutchouc naturel et la dispersion aqueuse de silice dopée pour obtenir un coagulum, - récupérer le coagulum, - sécher le coagulum récupéré pour obtenir le mélange maître.