METHOD OF PRODUCTION OF NITROGEN-CONTAINING LITHIUM ORGANIC INITIATING AGENT AND INITIATING AGENT OBTAINED BY THIS METHOD Russian patent published in 2005 - IPC

FIELD: polymerization of conjugated dienes and copolymerization with vinyl aromatic copolymers by interaction in hydrocarbon solvent medium.

SUBSTANCE: proposed method is used for copolymerization with vinyl aromatic solvent of lithium alkyl and organic amine; used as organic amine is compound of the following formula:

, where R¹ and R² are similar or different; C₁-C₄ are alkyl or allylic radicals; R³ is vinyl or phenyl radical. Process is performed at temperature of 20-35°C at equimolar ratio of lithium alkyl: organic amine and concentration of lithium alkyl in solution from 0.1 to 1.0 mole/l; then, diene or vinyl aromatic monomer or their mixture is fed to reaction zone continuously or in batches to mole ratio of conjugated monomer: starting lithium alkyl no less than 3 at concentration maintained at 0.05 to 0.20 mole/l. Invention is also useful to nitrogen-containing initiating agent of the following formula:

.

EFFECT: enhanced ecological safety with no change in polymerization of structure and composition of (co)polymers of conjugated dienes.

3 cl, 1 tbl, 8 ex