Method for recovering low molecular weight polymers

Details Method for recovering low molecular weight polymers Method for recovering low molecular weight polymers

C - Chemistry, Metallurgy

07

C

402/448, 402/473

C07C 15/00 (2006.01) C07C 69/34 (2006.01) C08C 2/06 (2006.01) C08F 36/04 (2006.01)

Patent

CA 1092608

ABSTRACT OF THE DISCLOSURE A method for recovering a low molecular weight polymer containing no catalyst residue, which method comprises the steps of: polymerizing a conjugated diolefin or copolymerizing comonomers of conjugated diolefins and a vinyl compound having anionic polymerization activity in the presence of a catalyst containing an organic sodium compound and a chain transfer agent of an alkyl aryl com- pound: uniformly mixing the obtained polymerization mixture with an isopropyl alcohol aqueous solution: separating thus obtained mixture into two phases of a polymer mixture containing the liquid low molecular weight polymer and an alcohol aqueous solution containing catalyst residue; and separating the low molecular weight polymer from the polymer mixture.

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