Resin-extended elastomer
AssigneeCompagnie Generale Des Etablissements Michelin
InventorsRachid Matmour, Richard Vivier, Vincent Abad
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Abstract
A resin-extended elastomer comprises an elastomer which is a synthetic diene elastomer with a number-average molar mass of greater than or equal to 200,000 g/mol and a resin which is a plasticizing hydrocarbon-based resin. A process for obtaining such a resin-extended elastomer and compositions, semi-finished products for tires and tires containing same are also disclosed.
Claims16
A resin-extended elastomer, the elastomer of which is a synthetic diene elastomer obtained by solution polymerization with a number-average molar mass of greater than or equal to 200,000 g/mol and the resin of which is a plasticizing hydrocarbon-based resin having a number-average molar mass of between 400 and 2000 g/mol, wherein the synthetic diene elastomer has a 1,2-vinyl butadiene monomer content of 5% to 30% by weight relative to a total weight of a polybutadiene part of the synthetic diene elastomer.
A process for obtaining a resin-extended elastomer, the process comprising at least (a) one step of placing at least one synthetic diene elastomer in solution in an organic solvent in contact with at least one plasticizing hydrocarbon-based resin, the synthetic diene elastomer having a number-average molar mass of greater than or equal to 200,000 g/mol and a 1,2-vinyl butadiene monomer content of 5% to 30% by weight relative to the total weight of a polybutadiene part of the synthetic diene elastomer, and the plasticizing hydrocarbon-based resin having a number-average molar mass of between 400 and 2000 g/mol;
- (b) one mixing step of mixing to obtain a homogenous solution of synthetic diene elastomer and of plasticizing hydrocarbon-based resin;
- (c) one steam stripping step of steam stripping to recover a gaseous fraction enriched in organic solvent and an aqueous dispersion of particles of synthetic diene elastomer and of plasticizing hydrocarbon-based resin;
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- (d) one step of recovering the resin-extended elastomer form the aqueous dispersion of particles of synthetic diene elastomer and of plasticizing hydrocarbon-based resin.
Dependencies are inferred from the claim text.