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Application

98109329/04, 1998-05-20

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Start date

1998-05-20

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Actual filing date

1998-05-20

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Published

1999-10-10

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Inventor

Zolotarev V.L.Sazykin V.V.Aksenov V.I.Sokolova A.D.Khlustikov V.I.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Zavod Sinteticheskogo Kauchuka"

METHOD OF PREPARING LOW MOLECULAR 1,2-POLYBUTADIENE Russian patent published in 1999 - IPC

Abstract RU 2139299 C1

FIELD: synthetic rubber industry, more particularly polymerization of butadiene-1,3. SUBSTANCE: butadiene is polymerized on toluene and n-hexane at 20-80 C by successively adding to solvent butadiene-1,3 to concentration of 10-60% and catalyst complex preformed at temperature ranging from -10 C to +50 C by mixing 2- ethylhexyl magnesium, sodium or potassium tetrahydrofurfurylate and divinylbenzene at magnesium to alkali metal ratio of 0.5-4.0 and magnesium to divinyl benzene of 2-20 and maintaining it for 0.1-5.0 hours in amount of 10-60 moles per ton of monomer with respect to magnesium compound. Method makes it possible to prepare low-molecular polybutadiene having molecular weight not greater than 50,000 and containing more than 60% of vinyl units at low catalyst consumption and high, process rate. EFFECT: more efficient preparation method. 1 tbl

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RU 2 139 299 C1

Authors

Zolotarev V.L.

Sazykin V.V.

Aksenov V.I.

Sokolova A.D.

Khlustikov V.I.

Dates

1999-10-10—Published

1998-05-20—Filed

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