Consists of a polymer of quinone or derivatives, a water soluble polymer, an inorganic colloid and an alkali metal silicate; used as antiscaling agent in polymerization of ethylenically unsaturated monomers in alkaline solution
公开/公告号：
US5889103 A
公开/公告日期：
Mar 30, 1999
摘要：
A polymer scale preventive agent for use in polymerization of a monomer having an ethylenically unsaturated double bond, comprising an alkaline solution containing (A) a condensation product having a molecular weight of 400 to 50,000 obtained by condensing a quinone compound. This agent is applied to the inner wall surfaces of a polymerization vessel, and dried to form a coating. Such a vessel is effective in preventing polymer scale deposition, not only on the areas located in the liquid-phase region but also on the areas around the interface between the gas and liquid phases in the vessel, and is useful in producing a polymer that shows few fish eyes and good whiteness when formed into sheets or the like.
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