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2 084 459

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Application

94012437/25, 1994-04-08

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Actual filing date

1994-04-08

(45)

Published

1997-07-20

(72)

Inventor

Dorofeev V.I.Mikhalev M.V.Ryl'Kov A.A.Kudrjavtsev L.D.Rachinskij A.V.Molodyka A.V.Efremov A.A.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa

METHOD OF CONTROLLING THERMOELASTIC PLASTICS POLYMERIZATION BATCH PROCESS Russian patent published in 1997 - IPC

Abstract RU 2084459 C1

FIELD: polymerization processes and synthetic rubber production. SUBSTANCE: catalyst charge is divided into two portions. The first one is charged simultaneously with solvent and styrene, its amount being proportional to moisture content in the two latter. After agitation is terminated, the second portion is charged, its amount being adjusted in dependence of melt index. Reaction temperature is controlled by portion-wise feeding of butadiene into reactor, the butadiene portions being proportionated taking into account optimal polymerization temperature. First portion of butadiene is loaded after styrene polymerization is completed and temperature is lowered to a value appropriate for butadiene polymerization, and the second one after completion of the first portion polymerization and lowering temperature to a maximum value for the beginning of the second portion polymerization. When temperature in reactor reaches 52 C during styrene polymerization, the gate controlling cooling agent access into reactor jacket is fully opened. EFFECT: achieved automation of polymerization process. 1 dwg

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RU 2 084 459 C1

Authors

Dorofeev V.I.

Mikhalev M.V.

Ryl'Kov A.A.

Kudrjavtsev L.D.

Rachinskij A.V.

Molodyka A.V.

Efremov A.A.

Dates

1997-07-20—Published

1994-04-08—Filed

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