Title:
PREPARATION OF EMULSION CONTAINING POLYVINYL CHLORIDE SUITABLE FOR RIGID PROCESSING
Document Type and Number:
Japanese Patent JPS5243893
Kind Code:
A
Abstract:
An improved process for the production of emulsifier-containing vinyl chloride polymers suitable for hard processing, the particle diameter of 90% of which is more than 63 mu , by polymerization of vinyl chloride and optionally monomers copolymerizable therewith in an aqueous emulsion in the presence of water-soluble catalysts and alkali salts of carboxylic acids as emulsifiers at pH 9.5-11.5 and spray-drying the thus-obtained latex, is characterized by conducting the polymerization in a dispersion containing at least 45% by weight of monomers with sodium or potassium salts of fatty acids of 8-18 carbon atoms as emulsifiers to a conversion of at least 80%, and, during the spray-drying step, reducing the pH to 6.0-8.0.
Inventors:
YOOZEFU KARUKA
HERUMAN BUINTERU
HERUMAN BUINTERU
Application Number:
JP11841676A
Publication Date:
April 06, 1977
Filing Date:
October 01, 1976
Export Citation:
Assignee:
HUELS CHEMISCHE WERKE AG
International Classes:
C08F2/26; C08F6/00; C08F14/00; C08F6/06; C08F14/06; (IPC1-7): C08F6/14; C08F14/06