The invention relates to the production of synthetic rubbers used in the manufacture of tires and tire parts, rubber products, golf balls and other similar products. In particular, the present invention relates to a process for producing a branched polydiene by polymerization of a conjugated diene in a hydrocarbon solvent medium, in the presence of a catalyst system comprising a lanthanide compound, an organosilicon compound, a conjugated diene and a halogen-containing component, by introducing a branching agent at the end of polymerization selected from a group of chlorine-containing compounds or compounds containing at least two maleic fragments, moreover, the hydrocarbon solvent is a mixture of aliphatic solvent (A) and low-boiling hydrocarbons C5-C6 (B), taken in the weight ratio (A): (B)=(50-90):(10-50). The technical result of the invention is to increase the productivity of the polydiene production process, reduce the dynamic viscosity of the polymerizate solution, improve the recyclability, increase the branching index of the polymer, characterized by a decrease in the tangent of the angle of mechanical losses tgδ (1200%), reduce the cold flow and improve the elastoplastic properties.
PROCESS FOR PRODUCING BRANCHED POLYDIENE
VERFAHREN ZUM PRODUZIEREN VON VERZWEIGTEM POLYDIEN
PROCÉDÉ DE PRODUCTION DE POLYDIÈNE RAMIFIÉ
20.09.2023
Patent
Elektronische Ressource
Englisch
IPC: | C08F MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS , Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind / B60C VEHICLE TYRES , Fahrzeugreifen / C08C TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS , Behandlung oder chemische Modifizierung von Kautschuken / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen |
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