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2 082 722

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Application

95108044/04, 1995-05-17

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Actual filing date

1995-05-17

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Published

1997-06-27

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Inventor

Aksenov V.I.Stepanova E.V.Sokolova A.D.Ziborova V.P.Gol'Berg I.P.Rjakhovskij V.S.Khlustikov V.I.Zolotarev V.L.Pakhomov V.A.Cherepov Ju.I.Arest-Jakubovich A.A.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa Zavod Sinteticheskogo Kauchuka"

PROCESS FOR PREPARING LOW MOLECULAR WEIGHT 1,2-POLYBUTADIENE Russian patent published in 1997 - IPC

Abstract RU 2082722 C1

FIELD: synthetic rubber, electrotechnical industrial rubber industries, and manufacture of plastic lubricants. SUBSTANCE: low molecular weight 1,2-polybutadiene is prepared by polymerization of butadiene-1,3 in toluene at 30-80 C and concentration of butadiene-1,3 within 10-50 wt % by successively adding n-butyl lithium in amount of 6-40 moles per 1 ton of monomer, compound selected from the group consisting of diethylene glycol dimethyl ester, permethylated polyethylene polyamines, dipiperidine ethane, tetramethylene diamine at molar ratio of 0.5 to 2,0 thereof to n-butyl lithium, the whole is maintained for: at least 2 minutes and potassium tetrahydrofurfurylate is then added at potassium to lithium atomic ratio from 0.05 to 0.25. The claimed invention makes it possible to obtain polybutadiene having high content of 1,2-units (more than 60 %) at elevated temperatures and more efficient process, and to reduce the amount of 1-phenylpentene-3 by-product. EFFECT: more efficient preparation process. 1 tbl

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RU 2 082 722 C1

Authors

Aksenov V.I.

Stepanova E.V.

Sokolova A.D.

Ziborova V.P.

Gol'Berg I.P.

Rjakhovskij V.S.

Khlustikov V.I.

Zolotarev V.L.

Pakhomov V.A.

Cherepov Ju.I.

Arest-Jakubovich A.A.

Dates

1997-06-27—Published

1995-05-17—Filed

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