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2 210 575

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Application

2001111901/04, 2001-04-27

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Start date

2001-04-27

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Actual filing date

2001-04-27

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Published

2003-08-20

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Inventor

Bazhenov Ju.P.Vasil'Ev V.A.Kutuzov P.I.Nasyrov I.Sh.Pronjaev V.N.Fedorov V.A.

(73)

Holder

Federal'Noe Gosudarstvennoe Unitarnoe Predprijatie Institut Sinteticheskogo Kauchuka Im. Akad. S.V.Lebedeva"

CYCLOPOLYISOPRENE PRODUCTION METHOD Russian patent published in 2003 - IPC

Abstract RU 2210575 C2

FIELD: rubber industry. SUBSTANCE: invention provides a method for production cyclopolyisoprene showing good film-forming properties and having weak coloration. Method consists in cyclization of polyisoprene dissolved in organic solvent in presence of titanium tetrachloride as catalyst in combination with electronodonor compound, the latter being compound reacting with titanium tetrachloride and/or forming chelate complex therewith, whereas cyclization process is carried out at titanium tetrachloride-to-polyisoprene ratio from 0.01:1 to 0.03:1. Once cyclization process is ended, protonodonor compound can be added to solution. Catalyst is prepared either preliminarily by mixing titanium tetrachloride with electronodonor compound or directly in polyisoprene solution, electronodonor compound-to-titanium tetrachloride molar ratio varying between 0.1:1 and 0.4:1. EFFECT: achieved desired properties of cyclopolyisoprene. 7 cl, 2 tbl, 34 ex

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RU 2 210 575 C2

Authors

Bazhenov Ju.P.

Vasil'Ev V.A.

Kutuzov P.I.

Nasyrov I.Sh.

Pronjaev V.N.

Fedorov V.A.

Dates

2003-08-20—Published

2001-04-27—Filed

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