Method for preparing a masterbatch of diene elastomer and silica
AssigneesCompagnie Generale Des Etablissements Michelin, Michelin Recherche et Technique S.A.
InventorsBenoit De Gaudemaris, Geraldine Laffargue, Julien Berriot
Life of this patent
Estimating the term…
Abstract
Preparation of a masterbatch of diene elastomer and silica including preparing at least one silica dispersion in water; bringing into contact and mixing an elastomer latex and the aqueous silica dispersion in the presence of a metal salt in order to obtain a coagulum; and recovering the coagulum and drying the recovered coagulum in order to obtain the masterbatch. The molar content of zinc cations, defined as the number of moles of zinc cations of the zinc salt per BET unit area of the silica, is between 1.19*10−6 and 5.62*10−6 mol/m2.
Claims18
A method for preparing a masterbatch of diene elastomer and silica comprising:
- preparing at least one dispersion of silica in water,
- bringing into contact and mixing an elastomer latex and the aqueous silica dispersion in the presence of an at least divalent zinc salt, thereby obtaining a coagulum,
- recovering the coagulum,
- drying the recovered coagulum, thereby obtaining a masterbatch;
- wherein the molar content of zinc cations, defined as the number of moles of zinc cations of the zinc salt per unit of silica surface area, is between 1.19×10−6 and 5.62×10−6 mol/m2.
Dependencies are inferred from the claim text.