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Application

98110165/04, 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

1999-12-10

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Inventor

Aksenov V.I.Grunin G.N.Zolotarev V.L.Sokolova A.D.Stepanova E.V.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Zavod Sinteticheskogo Kauchuka"

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

Abstract RU 2142474 C1

FIELD: synthetic rubber industry, more particularly preparation of anticorrosion and electroinsulating coatings, manufacture of tires and industrial rubber products. SUBSTANCE: described is method of preparing low molecular 1,2-polybutadiene by polymerization of butadiene-1,3 in hydrocarbon solvent in the presence of catalyst system comprising organic lithium compound, alkali metal alkoxide and electron donor additive. Electron donor compound is diethylene glycol diethyl ether and/or tetrahydrofurfuryl alcohol ether; alkali metal alkoxide is potassium tetrahydrofurfurylate or potassium diisobutyl aluminate, and polymerization is carried out in toluene at 20-80 C by successive addition of butadiene-1,3 to solvent to concentration of 10-60 wt % and catalyst system components provided that n-butyl lithium is used within 10-70 moles per ton of monomers and potassium to lithium molar ratios from 0.03 to 0.8 and electron donor additive to lithium molar ratio from 0.1 to 1.5. EFFECT: method makes it possible to obtain low-molecular polybutylene containing more than 60 % of vinyl links at low catalyst consumption rates and high process rate, wider range of electron donor compounds. 4 ex, 1 tbl

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RU 2 142 474 C1

Authors

Aksenov V.I.

Grunin G.N.

Zolotarev V.L.

Sokolova A.D.

Stepanova E.V.

Dates

1999-12-10—Published

1998-05-20—Filed

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