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2 074 197

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Application

95105726/04, 1995-04-14

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Actual filing date

1995-04-14

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Published

1997-02-27

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Inventor

Moiseev V.V.Kovtunenko L.V.Glukhovskoj V.S.Fil' V.G.Kudrjavtsev L.D.Molodyka A.V.Privalov V.A.Shedogubova N.K.Poluehktov I.T.Markova Z.N.Guljaeva N.A.

(73)

Holder

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

METHOD FOR PRODUCING BUTADIENE POLYMERS AND BUTADIENE/STYRENE COPOLYMERS Russian patent published in 1997 - IPC

Abstract RU 2074197 C1

FIELD: production of synthetic rubber, polymers and plastics for subsequent manufacture of tyres, rubber products and cables. SUBSTANCE: production of butadiene polymers and butadiene/styrene copolymers is carried out by continuous (co)polymerization of monomers in hydrocarbon solvent medium in presence of lithium-organic initiating agent, substituted benzene and modifying additive. Method is inventively novel in that toluene, xylene, mesitylene or cumene are used as substituted benzene. Said modifying additive is alkali metal styrylphenolate of general formula OMeR, wherein Me= K or Na, one of RR1, RR2, RR3 is α-methylbenzyl, while two others are selected from group consisting of a-methylbenzyl, hydrogen, methyl, tert-butyl, octyl, nonyl, cumyl, at molar ratio of substituted benzyl-to-alkali metal styrylphenolate equal to 400-20000, alkali metal styrylphenolate being taken in amount 0.5-4.0 mmole per 1 kg monomers. Aliphatic and/or cycloaliphatic hydrocarbon is used as solvent. EFFECT: formation of insoluble high-molecular polymer (gel), consequently, blocking up of polymerization equipment can be prevented. 1 tbl

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RU 2 074 197 C1

Authors

Moiseev V.V.

Kovtunenko L.V.

Glukhovskoj V.S.

Fil' V.G.

Kudrjavtsev L.D.

Molodyka A.V.

Privalov V.A.

Shedogubova N.K.

Poluehktov I.T.

Markova Z.N.

Guljaeva N.A.

Dates

1997-02-27—Published

1995-04-14—Filed

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