Patent ID: 9175144
Filing Date: 2015-11-03
Classification: B60C,C08J,C08K

Abstract:
1. A method for preparing a silica/natural rubber masterbatch, which can be achieved without adding any coagulant or any coupling agent, comprising in succession: doping a silica with an aluminum to form a doped-silica having a level of aluminum doping; preparing at least one dispersion of the doped silica in water to form an aqueous doped-silica dispersion; providing a natural rubber field latex; adjusting the pH of the aqueous doped-silica dispersion so that the pH of a formulation resulting from mixing the natural rubber field latex with the aqueous doped-silica dispersion is: adjusting the volume of the aqueous doped-silica dispersion relative to the volume of the natural rubber field latex such that the combined volumes have the desired pH; bringing the volume of the natural rubber field latex into contact with the volume of the aqueous doped-silica dispersion and mixing them together to form the formulation and to obtain a coagulum; recovering the coagulum; and drying the recovered coagulum to obtain a silica/natural rubber masterbatch.