Process for preparing cis-polyisoprene

Details Process for preparing cis-polyisoprene Process for preparing cis-polyisoprene

C - Chemistry, Metallurgy

08

F

402/434

C08F 136/08 (2006.01) C08F 4/64 (2006.01)

Patent

CA 1096547

ABSTRACT OF THE DISCLOSURE A process for preparing cis-polyisoprene which comprises polymerization of isoprene in a medium of a non-polar hydro- carbon solvent at a temperature ranging from 0 to 60°C in the presence of a catalyst comprising a reaction product of titan- ium tetrachloride and an intracyclic organo-aluminium compound having the formula: Image or Image wherein R, the same or different, are H, CH3; taken in a molar ratio of 1:1.05-1.1 respectively, weight ratio of isoprene to said catalyst being equal to 100:0.2-0.7. The present invention makes it possible to improve the quality of the thus-obtained cis-polyisoprene and to increase the catalyst capacity by 2 times due to modification of its properties.

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