POLYMER SCALE PREVENTIVE AGENT POLYMERIZATION VESSEL EFFECTIVE IN PREVENTING POLYMER SCALE DEPOSITION AND PROCESS FOR PREPARATION OF POLYMER

摘要

A polymer scale preventive agent for use in polymerization of a haloethylene or a monomer mixture containing the same, comprising: (A) an aromatic compound having at least one group selected from the class consisting of primary, secondary and tertiary amino groups, quaternary ammonium groups and the azo group and/or a dye having at least one group selected from said class, and (B) an alkali metal or ammonium salt of a polyvinylsulfonic acid, and (C) a naphthoquinone natural dye; a polymerization vessel having a coating comprising said scale preventive agnet. A process of preparing a haloethylene polymer using the vessel can produce a polymer of high quality without polymer scale deposition.