Method for producing resins from rubber chips

A method of producing hydrocarbon-containing resins starting from a charge comprising rubber chips, the method comprising:

• (a) a step of pyrolysis of the rubber chips carried out at a temperature between 300 and 900° C. with an increasing temperature ramp, giving a gaseous effluent, a pyrolysis oil and a solid effluent, the pyrolysis oil comprising at least 1.5 wt % of C4-C12 olefinic monomers;
• (b) a step of separation of the pyrolysis oil into at least one raffinate, an intermediate fraction and an extract, the intermediate fraction comprising from 10 to 90 wt % of C4-C12 olefinic monomers and at most 10 wt % of heteroatoms;
• (c) a resin synthesis step comprising a polymerization section supplied at least with the intermediate fraction resulting from step (b), followed by a finishing section producing a polymerized effluent;
• and
• (d) a step of treatment of the polymerized effluent resulting from step (c) comprising a section for separation of an effluent rich in inert compounds and an effluent rich in resins, and a drying section supplied with the resin-rich effluent in order to produce a stream of hydrocarbon-containing resins,
• wherein no additional inert compounds are externally supplied during the method of production of hydrocarbon-containing resins, inert compounds not being incorporated in the resin and not interacting with the catalytic system in step (c).