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2 155 775

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C2

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IPC

(21) (22)

Application

98112157/04, 1998-06-22

(24)

Start date

1998-06-22

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Actual filing date

1998-06-22

(45)

Published

2000-09-10

(72)

Inventor

Kronman A.G.Kanakov A.E.Groshev G.L.

(73)

Holder

Oao

METHOD OF SUSPENSION POLYMERIZATION OF VINYL CHLORIDE Russian patent published in 2000 - IPC

Abstract RU 2155775 C2

FIELD: chemistry of high-molecular compounds. SUBSTANCE: described is method of suspension polymerization of vinyl chloride in the presence of protective colloid and initiating system based on di-2-ethylhexylperoxy dicarbonate. Second component includes potassium persulfate, phthalimide or alkylbetain which are added prior to polymerization simultaneously with main initiator, and after pressure fall in reactor, process temperature is raised by 8-12 C higher than original temperature and maintained for 1 hour. EFFECT: simplified process with higher yield and improved characteristics of the desired product. 3 ex, 1 tbl

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RU 2 155 775 C2

Authors

Kronman A.G.

Kanakov A.E.

Groshev G.L.

Dates

2000-09-10—Published

1998-06-22—Filed

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