Suspension polymerization of vinyl chloride

Details Suspension polymerization of vinyl chloride Suspension polymerization of vinyl chloride

C - Chemistry, Metallurgy

08

F

C08F 2/20 (2006.01) C08F 14/06 (2006.01) C08F 114/06 (2006.01)

Patent

CA 2065564

-19- ABSTRACT OF THE DISCLOSURE An improved method is proposed for the suspension polymer- ization of vinyl chloride monomer in an aqueous medium, by which the polyvinyl chloride resin obtained may have an increased bulk density without causing any disadvantages. The improvement can be obtained by controlling the power on the stirrer for the agita- tion of the polymerization mixture in such a manner that the pow- er at the moment of the start of the polymerization reaction is 100 to 200 kgf?m/s per 1000 kg of the polymerization mixture and the power is subsequently decreased to 60% to 90% of the value at the start of the polymerization reaction until the moment when con- version of the monomer to polymer does not exceed 30%.

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