Process for continuous synthesis of a diene elastomer

A process for the continuous synthesis of a diene elastomer, comprising, simultaneously:

• a) introducing continuously into a polymerisation reactor containing a gas phase and equipped with at least one stirring rotor and a discharge device, at least
• i. one or more monomer(s) to be polymerised, including at least one conjugated diene monomer, and
• ii. from 0% to 70% by mass of an organic solvent, calculated relative to the total mass of monomer(s) and of solvent
• b) continuously polymerising the monomer(s),
• c) stirring a polymerisation medium via the continuous movement of at least one stirring rotor about a rotary axle,
• d) continuously discharging an elastomer paste derived from the polymerisation,
• e) continuously conveying the discharged elastomer paste to a chopping device and chopping it into particles,
• f) removing the solvent from the particles of the elastomer paste and
• g) recovering the diene elastomer of the particles obtained in the preceding step;
• wherein
• (1) the process has a degree of conversion of at least 60%, at the limit of the first third of the reaction volume of the polymerisation reactor, and
• (2) the process has a residence time distribution function in the polymerisation reactor having a standard deviation that is greater than the mean residence time divided by 2√3.