Method for the preparation of polyvinyl chloride resin

Details Method for the preparation of polyvinyl chloride resin Method for the preparation of polyvinyl chloride resin

C - Chemistry, Metallurgy

08

L

400/9368

C08L 27/06 (2006.01) C08F 2/18 (2006.01) C08F 2/44 (2006.01) C08F 14/06 (2006.01) C08K 5/103 (2006.01)

Patent

CA 2036186

An improvement is proposed for decreasing triboelectric static charging of a polyvinyl chloride resin powder so as to improve the flowability of the powder and prevent a decrease in the bulk density of the powder due to static electricity. The improvement comprises, in the polymerization process of vinyl chloride monomer in an aqueous medium, adding, to the aqueous polymerization mixture, a specified amount of an aqueous dispersion containing a salt of a long-chain carboxylic acid with a divalent metal and an ester of sorbitan with a long-chain carboxylic acid in a specified weight proportion and in a specified total concentration at a moment when conversion of the monomer to polymer is at least 70%.

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