Method for producing low molecular weight polymer

Details Method for producing low molecular weight polymer Method for producing low molecular weight polymer

C - Chemistry, Metallurgy

07

C

402/457, 402/473

C07C 15/12 (2006.01) C08F 36/04 (2006.01)

Patent

CA 1087639

ABSTRACT OF THE DISCLOSURE In a method for producing a low molecular weight polymer or copolymer by introducing metallic sodium or a organic sodium compound as a polymerization initiator, an alkyl aryl compound as a chain transfer agent, an inert hydrocarbon as a solvent and a conjugated diolefin or both a conjugated diolefin and a vinyl compound having anionic copolymerization activity with diolefins as a monomer or monomers, into a polymerization vessel and polymerizing or copolymerizing therein successively at a temperature of 0 to 100°C, the improvement in the method for producing a low molecular weight polymer or copolymer having a number average molecular weight of 300 to 10,000 with good reproducibility is characterized in that 0.05 to 10 mole % per 1 mole of the said polymerization initiator, of oxygen is fed into said polymerization vessel.

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