Title:
SUSPENSION POLYMERIZATION OF VINYL CHLORIDE
Document Type and Number:
Japanese Patent JPH04248811
Kind Code:
A
Abstract:
PURPOSE:To enable to suspension-polymerized vinyl chloride in excellent productivity by charging a prescribed amount of deionized water, a suspending agent and a polymerization initiator to an autoclave, further charging vinyl chloride and a prescribed amount of heated deionized water in the autoclave to heat the mixture to the reaction temperature, and subsequently polymerizing the mixture. CONSTITUTION:In a method for suspension-polymerizing vinyl chloride, the ordinary temperature deionized water in an amount of 20-50wt.% based on all the amount of water in the polymerization system, a suspending agent such as styrene.maleic acid copolymer and a polymerization inhibitor such as hydroquinone (preferably in an amount of 0.005-0.05 pt.wt. per 100 pts.wt. of the vinyl chloride) are charged to an autoclave, and stirring is started. Vinyl chloride and the remaining 50-80wt.% of deionized water heated above the polymerization temperature are further charged to the autoclave to heat the reaction system, followed by charging a polymerization initiator and polymerizing to provide a suspension polymerized vinyl chloride improved in fishetyes and the particle distribution.
Inventors:
UNO SHIGERU
KANEKO HIROSHI
KANEKO HIROSHI
Application Number:
JP2370091A
Publication Date:
September 04, 1992
Filing Date:
January 25, 1991
Export Citation:
Assignee:
TOSOH CORP
International Classes:
C08F2/00; C08F2/18; C08F2/20; C08F2/40; C08F14/00; C08F14/06; (IPC1-7): C08F2/00; C08F2/20; C08F14/06