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Patent Searching and Data


Title:
MANUFACTURE OF ETHYLENIC POLYMER OF COPOLYMER
Document Type and Number:
Japanese Patent JPS5876404
Kind Code:
A
Abstract:

PURPOSE: To obtain titled (co)polymer of high-quality by carrying out a polymerization, under a specific condition, with the introduction of an initiator while regulating its feed by a control valve according to the monomer flow into a tubular reactor to suppress abnormal reaction caused by local heating to stabilize the polymerization process.

CONSTITUTION: Ethylene 1 or a mixture comprising ethylene and co-monomer 4 is introduced into a tubular reactor 8 followed by injecting an initiator at one or more points along the length of the reactor 8 to carry out a (co)polymerization at 120W350°C under a pressure of 1,000W4,000kg/cm2. The injection of the initiator is made in the following manner: Control valves 11 and 14 are provided along the initiator feed pipe. The exit valve 18 is turned on. Subsequently to the time when the effect of the resultant pressure drop reaches the initiator injection point(s), the valves 11 and 14 are turned on and following the time when the pressure at said injection point(s) falls to a minimum, both valves 11 and 14 are turned off. Immediately after the resulting restoration of the pressure to a normal level, the valves 11 and 14 are turned on again and the initiator is charged into the reactor 8 in such an amount as to correspond to the variation of the monomer flow in the reactor.


Inventors:
OOTA OTOZOU
IRIZUMI AKIRA
IWANO HIROBUMI
Application Number:
JP17370181A
Publication Date:
May 09, 1983
Filing Date:
October 31, 1981
Export Citation:
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Assignee:
TOYO SODA MFG CO LTD
International Classes:
C08F2/00; C08F2/34; C08F10/00; C08F10/02; (IPC1-7): C08F2/34; C08F10/02