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2 223 973

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IPC

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Application

2002120823/04, 2002-07-30

(24)

Start date

2002-07-30

(22)

Actual filing date

2002-07-30

(45)

Published

2004-02-20

(72)

Inventor

Vasil'Ev V.A.Pronjaev V.N.Fedorov V.A.

(73)

Holder

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

CYCLOPOLYISOPRENE MANUFACTURE METHOD Russian patent published in 2004 - IPC

Abstract RU 2223973 C1

FIELD: rubber industry. SUBSTANCE: subject of invention is manufacture of cyclopolyisoprene by partially destructive cyclization of polyisoprene, in particular natural-origin or synthetic isoprene rubber. Cyclized polyisoprene is obtained by cyclization of polyisoprene in organic solvent catalyzed by titanium tetrachloride at 50-150 C until desired degree of cyclization is attained followed by treating reaction mixture with propylene oxide and alkylphenolamine resin using titanium tetrachloride/propylene oxide molar ratio from 1:3 to 1:10. As alkylphenolamine resin, Oktofor N or antioxidant AFA-1 are used at resin-to-propylene oxide weight ratio from 1:5 to 5:1. EFFECT: improved properties regarding coloration, waterproofness, mechanical characteristics, and corrosion resistance. 3 cl, 1 tbl, 7 ex

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RU 2 223 973 C1

Authors

Vasil'Ev V.A.

Pronjaev V.N.

Fedorov V.A.

Dates

2004-02-20—Published

2002-07-30—Filed

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