Molecular weight control of polybutadiene

Details Molecular weight control of polybutadiene Molecular weight control of polybutadiene

C - Chemistry, Metallurgy

08

F

402/419, 402/444

C08F 136/06 (2006.01) C08F 4/70 (2006.01)

Patent

CA 1236649

ABSTRACT OF THE DISCLOSURE MOLECULAR WEIGHT CONTROL OF POLYBUTADIENE A process for the regulation of the molecular weight of a high cis 1,4-polybutadiene prepared by polymerizing 1,3-butadiene in a solution of an aliphatic and/or cycloaliphatic solvent system employing as a catalyst system a mixture of (1) an organonickel compound, (2) an organoaluminum compound and (3) a fluorine containing compound selected from the group consisting of hydrogen fluoride and hydrogen fluoride complexes prepared by complexing hydrogen fluoride with ketones, esters, ethers, alcohols, phenols and water, said polymerization being conducted in the presence of small amounts of alpha olefins such as ethylene and propylene.

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