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Patent Searching and Data


Title:
SUSPENSION POLYMERIZATION OF VINYL CHLORIDE
Document Type and Number:
Japanese Patent JPH04248813
Kind Code:
A
Abstract:
PURPOSE:To enable to suspension-polymerize vinyl chloride in excellent productivity by charging a prescribed amount of deionized water, a suspending agent and a polymerization inhibitor to an autoclave, further charging vinyl chloride, a prescribed amount of the deionized water heated above the polymerization temperature, and a polymerization initiator to the autoclave, and subsequently polymerizing the mixture. CONSTITUTION:In a method for suspension-polymerizing vinyl chloride, the ordinary temperature deionized water in an amount of 25-50wt.% based on all the amount of water in the polymerization system, a suspending agent such as styrene.maleic acid copolymer, a polymerization inhibitor such as hydroquinone are charged to an autoclave, and stirring is started. Vinyl chloride, the remaining 50-80wt.% of the deionized water heated to above the polymerization temperature, and an emulsified polymerization initiator are further charged and immediately polymerized to provide a suspension-polymerized vinyl chloride improved in fisheyes and particle distribution.

Inventors:
UNO SHIGERU
KANEKO HIROSHI
Application Number:
JP2370291A
Publication Date:
September 04, 1992
Filing Date:
January 25, 1991
Export Citation:
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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