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Application

96102825/04, 1996-02-14

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Actual filing date

1996-02-14

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Published

1998-04-27

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Inventor

Aksenov V.I.Zolotarev V.L.Ziborova V.P.Sazykin V.V.Sklovskij M.D.Kropacheva E.N.Smirnova L.V.

(73)

Holder

Tovarishchestvo S Ogranichennoj Otvetstvennost'Ju Firma

METHOD OF SYNTHESIS OF CIS-1,4-POLYBUTADIENE Russian patent published in 1998 - IPC

Abstract RU 2109758 C1

FIELD: organic chemistry and technology, rubber industry. SUBSTANCE: process is carried out in toluene containing water at amount (0.5-3.0) x 10-3 wt. -% at 0-50 C in the presence of catalytic system at concentration 0.02-0.15 mmole/l charge. Catalytic system is a complex formed at (-30)-(+30) C by addition diene to hydrocarbon solvent. Diene is taken from the group involving butadiene-1,3, isoprene, pentadiene-1,3. Cobalt compounds - octoate, 2-ethylhexoate, naphthenate, salt of C10-C12-saturated acids, alkylaluminium chlorides of the formula R2AlCl and R3Al2Cl3 where R - hydrocarbon radical iso-butyl, ethyl, compounds taken from the group involving N-methyl-α-pyrrolidone, alkylalumoxanes of the formula where n = 2-20 at molar ratio of cobalt compound : diene : alkylaluminium chloride : addition at the range from 1:3:10:2 to 1: 10: 80: 30. Complex is kept for at least 30 min. Method ensures to obtain rubber of the controlled branching, increased homogeneity of ready production. EFFECT: improved method of synthesis, increased yield. 1 tbl

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RU 2 109 758 C1

Authors

Aksenov V.I.

Zolotarev V.L.

Ziborova V.P.

Sazykin V.V.

Sklovskij M.D.

Kropacheva E.N.

Smirnova L.V.

Dates

1998-04-27—Published

1996-02-14—Filed

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