Title:
POLYMERIZATION OF VINYL CHLORIDE MONOMER
Document Type and Number:
Japanese Patent JPH04252201
Kind Code:
A
Abstract:
PURPOSE:To polymerize a vinyl chloride monomer while suppressing the deposition of polymer scale by spraying a scale-deposition inhibitor through a nozzle directing straightly downward direction and attached to an accessory apparatus above a polymerizer, charging the monomer into the polymerizer after forming a film of the inhibitor and spraying water to the inner surface of the accessory apparatus. CONSTITUTION:A vinyl chloride monomer is polymerized with a polymerizing apparatus 31 composed of a polymerizer 32 having a plurality of accessory apparatuses such as various pipings 33, 34 or condenser 38 on the top of the polymerizer. A scale- deposition inhibitor (e.g. hydrophilic cationic dye) is sprayed through an injection nozzle 35 attached to the upper part of the accessory apparatus in a state directing straightly downward direction to form the film of the scale-deposition inhibitor on the inner surface of the polymerization apparatus 31. The polymerizer is charged with a vinyl chloride monomer, a suspension agent (e.g. partially saponified polyvinyl alcohol) and a polymerization initiator (e.g. lauroyl peroxide) and heated at 55 deg.C to effect the polymerization while spraying water to the inner surface of the accessory apparatus through an injection pipe 37 to obtain a polymer having high quality while suppressing the deposition of polymer scale in the accessory apparatus of the polymerizing apparatus 31.
Inventors:
KIMURA TOMOHIRO
MORIMOTO TADASHI
KURODA SADAKI
MORIMOTO TADASHI
KURODA SADAKI
Application Number:
JP870291A
Publication Date:
September 08, 1992
Filing Date:
January 28, 1991
Export Citation:
Assignee:
MITSUBISHI KASEI VINYL
International Classes:
C08F2/00; C08F14/00; C08F14/06; (IPC1-7): C08F2/00; C08F14/06
Attorney, Agent or Firm:
Hasegawa Soji