Polybutadiene having high 1, 2 and cis-1,4 microstructure...

Details Polybutadiene having high 1, 2 and cis-1,4 microstructure... Polybutadiene having high 1, 2 and cis-1,4 microstructure...

C - Chemistry, Metallurgy

08

F

402/444

C08F 4/62 (2006.01) C08F 36/06 (2006.01) C08F 136/06 (2006.01)

Patent

CA 1252599

Abstract of the Disclosure A process for producing polybutadiene of a high degree of polymerization having high 1,2 and cis-1,4 microstructure contents and a low trans-1,4 micro- structure content, which comprises polymerizing 1,3- butadiene in the presence of a catalyst system composed of (1) a halogen-containing organoaluminum com- pound, (2) (a) a cobalt dithiocarbamate compound or (b) the reaction product of carbon disulfide, a secondary amine and a cobalt compound, and (3) water. The polybutadiene has for example (A) a 1,2 microstructure content of 7 to 50%, (B) a cis-1,4 microstructure content of at least 50%, (C) a trans-1,4-microstructure content of at most 5%, (D) an inherent viscosity, measured in toluene at 30 °C, of at least 1, and (E) a gel content of at most 0.3%.

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