Method for producing low molecular weight polymer

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

1977-12-02

1982-01-26

Gantz, Delbert E.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire cyclic molecules or entire...

585517, 585507, C07C 1102

Patent

active

043130194

ABSTRACT:
In a method for producing a low molecular weight polymer or copolymer by introducing metallic sodium or an 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.degree. to 100.degree. 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.

REFERENCES:
patent: 3306949 (1967-02-01), Mertzweiler et al.
patent: 3324191 (1967-06-01), Wofford
patent: 3789090 (1974-01-01), Otsuki et al.

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