Polymer scale preventive agent, and polymerization vessel...

Details Polymer scale preventive agent, and polymerization vessel... Polymer scale preventive agent, and polymerization vessel...

C - Chemistry, Metallurgy

08

L

C08L 29/04 (2006.01) B01J 19/02 (2006.01) B29B 7/80 (2006.01) C08F 2/00 (2006.01) C08F 14/06 (2006.01) C09D 129/04 (2006.01)

Patent

CA 2050074

ABSTRACT OF DISCLOSURE A polymer scale preventive agent for use in polymerization of vinyl chloride monomer or a monomer mixture containing vinyl chloride monomer as a major component, comprising: (A) a naphthoquinone natural dye and (B) a polyvinyl alcohol with a saponification degree of at least 50 mol%. The polymer scale preventive agent is formed as coating on the inner wall, etc. of a polymeriza- tion vessel. Deposition of polymer scale can be always effectively prevented. Polymers with a high whiteness can be produced, and products formed from the polymer have only a small number of fish eyes.

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