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Application

96106229/04, 1996-03-27

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Actual filing date

1996-03-27

(45)

Published

1999-01-10

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Inventor

Konovalenko N.A.Kharitonov A.G.Proskurina N.P.Kudrjavtsev L.D.Molodyka A.V.Privalov V.A.Rachinskij A.V.Markov I.R.

(73)

Holder

Voronezhskij Filial Gosudarstvennogo Predprijatija Institut Sinteticheskogo Kauchuka Im.Akad.S.V.Lebedeva"

METHOD OF PREPARING DIENE COPOLYMERS (VARIANTS) Russian patent published in 1999 - IPC

Abstract RU 2124529 C1

FIELD: manufacture of tires. SUBSTANCE: claimed method comprises preparing diene copolymers by anionic polymerization in inert organic solvent in the presence of catalyst system based on butyl lithium and cocatalyst. Cocatalyst is ethylene-N,N,N′,N′--tetra (sodium oxymethylethylene). Catalyst system is product of reaction of butyl lithium with ethylenediamine-N,N,N′,N′-tetra (sodium oxymethylethylene) and isoprene at isoprene to ethylenediamine-N,N,N′,N′-tetra (sodium- oxymethylethylene) to butyl lithium molar ratio of (15-25): (0.07-0.15):1, and polymerization is carried out at weight ratio of butadiene-isoprene monomers from 40-60 to 40-60. According to 2nd embodiment of the present invention, polymerization is carried out at weight ratio of butadiene-styrene monomers from 85-90 to 15-10. According to 3-rd embodiment of the present invention, polymerization is carried out at weight ratio of butadiene-styrene-isoprene from 30-40 to 15-30 to 30-50. EFFECT: higher dynamic and fatigue properties, heat resistance, greater adhesion with wet highway and low resistance to rocking of protector rubber. 4 cl, 4 tbl

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RU 2 124 529 C1

Authors

Konovalenko N.A.

Kharitonov A.G.

Proskurina N.P.

Kudrjavtsev L.D.

Molodyka A.V.

Privalov V.A.

Rachinskij A.V.

Markov I.R.

Dates

1999-01-10—Published

1996-03-27—Filed

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