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Application

95117345/04, 1995-10-11

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Actual filing date

1995-10-11

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Published

1998-04-27

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Inventor

Aksenov V.I.Golovina N.A.Grishchenko A.I.Grunin G.N.Gol'Berg I.P.Khlustikov V.I.Rjakhovskij V.S.Kolokol'Nikov A.S.Bobrovskij N.A.Zolotarev V.L.Murachev V.B.Nesmelov A.I.Byrikhin V.S.Sazykin V.V.

(73)

Holder

Tovarishchestvo S Ogranichennoj Otvetstvennost'JuOtkrytoe Aktsionernoe Obshchestvo Zavod Sinteticheskogo Kauchuka"

LOW-MOLECULAR POLYISOBUTYLENE PRODUCTION PROCESS Russian patent published in 1998 - IPC

Abstract RU 2109754 C1

FIELD: polymer production. SUBSTANCE: invention relates to producing polyisobutylene useful as thickening additive for industrial oils and for preparing viscous lubricants, adhesives, hermetics, and other. Polymerization is carried out in solvent constituting mixture of toluene and diisobutylene at weight ratio from 20:1 to 1:20 and at temperature from 30 to +60 C by way of successively introducing isobutylene into solvent to maintain its content within the range 10 to 60 wt % and titanium tetrachloride to its content 0.05 to 1.0 mol per 100 kg of monomer, after which reaction mixture is aged for at least 2 min and then supplemented by triisobutylaluminum. The latter is added in a mixture containing 3 to 50 mol % diisobutylaluminum hydride and/or 5 to 25 mol % tetraisobutylalumoxan. Titanium to aluminum molar ratio ranges from 0.5 to 100. Process enables producing low-molecular polyisobutylene with narrow molecular-mass distribution requiring reduced commercial catalytic system components intakes. Yield of polymer is quantitative and molecular mass of polymer is controllable within wide limits. EFFECT: enhanced process efficiency. 1 tbl

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RU 2 109 754 C1

Authors

Aksenov V.I.

Golovina N.A.

Grishchenko A.I.

Grunin G.N.

Gol'Berg I.P.

Khlustikov V.I.

Rjakhovskij V.S.

Kolokol'Nikov A.S.

Bobrovskij N.A.

Zolotarev V.L.

Murachev V.B.

Nesmelov A.I.

Byrikhin V.S.

Sazykin V.V.

Dates

1998-04-27—Published

1995-10-11—Filed

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