METHODE POUR PREPARER UN MELANGE MAITRE D'ELASTOMERE DIENIQUE ET DE SILICE

摘要

The invention relates to a method for preparing a masterbatch of diene elastomer and of silica, involving the following successive steps: - preparing at least one dispersion of silica in water, - bringing an elastomer latex into contact with and mixing it into the aqueous dispersion of silica in the presence of a calcium salt in order to obtain a coagulum, - recovering the coagulum, - drying the recovered coagulum in order to obtain the masterbatch; the molar ratio of calcium cations, defined as being the number of moles of calcium cations in the calcium salt per unit area of silica is comprised between 1.19* 10-6 and 2.81 * 10-6 mol/m2.