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2 131 889

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Application

97106254/04, 1997-04-01

(22)

Actual filing date

1997-04-01

(45)

Published

1999-06-20

(72)

Inventor

Zaboristov V.N.Byrikhina N.N.Rjakhovskij V.S.Ivannikov V.V.Gol'Berg I.P.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Zavod Sinteticheskogo Kauchuka"

POLYISOBUTYLENE PRODUCTION PROCESS Russian patent published in 1999 - IPC

Abstract RU 2131889 C1

FIELD: polymer production. SUBSTANCE: polyisobutylene production process via polymerization of isobutylene in hydrocarbon solvent in presence of preliminarily prepared catalyst containing Lewis acid and organoaluminum compound is distinguished by that preliminarily prepared catalyst additionally contains isobutylene and represents complex prepared by interaction of Lewis acid, organoaluminum compound, and isobutylene at molar ratio 1:0.1: 0.01. Organoaluminum compound is selected from the group including: interaction products of equimolar amounts of trialkylaluminum and alkanolamine of formula , wherein R is ethyl or isobutyl, R' and R" are hydrogen, ethyl, isobutyl, group , or polyaluminooxane with general formula wherein n = 0-30, R, R', and R" are hydrogen, ethyl, or isobutyl; dialkylaluminum hydride wherein alkyl radicals are ethyl or isobutyl; trialkylaluminum; mixture of polyaluminooxane with dialkylaluminum hydride; and polyaluminooxane- trialkylaluminum mixture. Polymerization is stopped by substances selected from the group including: alkyldimethylbenzylammonium chloride, sodium methyl siliconate, sodium ethyl siliconate, tetrahydrofurfuryl alcohol, tetraethoxysilane. Polymer is then purified by filtration of polymerizate and degassing. EFFECT: increased catalyst activity. 3 cl, 2 tbl, 11 ex

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RU 2 131 889 C1

Authors

Zaboristov V.N.

Byrikhina N.N.

Rjakhovskij V.S.

Ivannikov V.V.

Gol'Berg I.P.

Dates

1999-06-20—Published

1997-04-01—Filed

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