Patent ID: 9611380
Date: 2017-04-04
CPC Classifications: B60C,C08J,C08K,C08L

Claim:
1. A process for obtaining a composition based on at least one diene elastomer, a reinforcing filler comprising at least carbon black and an inorganic filler with an inorganic filler content of less than or equal to 50 parts by weight per hundred parts of elastomer, which comprises the following steps: preparing a first masterbatch comprising the diene elastomer and the carbon black, this first masterbatch having a dispersion of the reinforcing filler in the elastomeric matrix that has a Z value greater than or equal to 90, the step of preparing the first masterbatch including forming a coagulated mixture of the diene elastomer and the carbon black, and drying the coagulated mixture in order to recover the first masterbatch, incorporating the inorganic filler, the second elastomer and the other constituents of the composition, with the exception of the crosslinking system, into the dried first masterbatch in a mixer, everything being kneaded thermomechanically until a maximum temperature of between 130° C. and 200° C. is reached, cooling the combined mixture to a temperature below 100° C., subsequently incorporating: the crosslinking system, kneading everything up to a maximum temperature below 120° C.