Patent ID: 8716366

Claim:
A process for preparing natural rubber master batch comprises of following steps: a. preparing carbon black dispersion by mixing carbon black with at least one surfactant, b. preparing silica dispersion by mixing silica with at least one surfactant, c. preparing nanoclay dispersion by mixing nanoclay with at least one surfactant, d. preparing soap sensitized natural rubber latex by mixing fresh natural rubber latex with at least one surfactant, e. adding dispersions of step (a), (b), and (c) slowly into the said soap sensitized natural rubber latex of step (d) under constant stirring to form a master mixture, f. adding dilute sulphuric acid to coagulate the said master mixture to form a coagulum of master batch, g. dewatering and drying the said coagulum of master batch, characterized in preparing three different dispersions comprising of carbon black dispersion in step (a), silica dispersion in step (b) and nanoclay dispersion in step (c) and adding the said three dispersions slowly into the said soap sensitized natural rubber latex of step (d) under constant stirring to form a master mixture.