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2 130 948

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IPC

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Application

98109358/02, 1998-05-20

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Actual filing date

1998-05-20

(45)

Published

1999-05-27

(72)

Inventor

Aksenov V.I.Golovina N.A.Zolotarev V.L.Grishchenko A.I.Byrikhin V.S.Nesmelov A.I.Murachev V.B.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Zavod Sinteticheskogo Kauchuka"

POLYISOBUTYLENE PRODUCTION PROCESS Russian patent published in 1999 - IPC

Abstract RU 2130948 C1

FIELD: polymerization reactions and lubricant additives. SUBSTANCE: polyisobutylene useful as thickening lubricant additive and source for preparing hermetics, glues, and other products is produced by polymerization of isobutylene in hydrocarbon solvents in presence of catalytic system consisting of titanium halides and trialkylaluminum, in particular, triisobutylaluminum. Process is carried out at temperature from -40 to +40 C by way of consecutively adding, to solvent (toluene, xylene, n-hexane, isopentane), isobutylene in amount 10-60 wt %, divinylbenzene in amount 0.1-5.0% based on isobutylene weight, titanium tetrachloride on the basis of 0.005-2.0 mole per 100 kg of monomer, and triisobutylaluminum at Ti/Al molar ratio from 20 to 0.5. EFFECT: reduced consumption of catalytic system components, increased yield of product, and increased its thickening capability with low molecular weight. 5 ex

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RU 2 130 948 C1

Authors

Aksenov V.I.

Golovina N.A.

Zolotarev V.L.

Grishchenko A.I.

Byrikhin V.S.

Nesmelov A.I.

Murachev V.B.

Dates

1999-05-27—Published

1998-05-20—Filed

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