The invention provides a method for preventing polymer scale build-up on the reactor walls, in particular, in the suspension or emulsion polymerization of an ethylenically unsaturated monomer effective even in the cases where the polymerization initator is a monomer-soluble organic peroxide having a relatively high solubility in water which hitherto has been not used due to the difficulty in preventing polymer scale build-up despite the superior quality of the polymer product obtained therewith. The method comprises coating the reactor walls in advance with an aqueous coating composition comprising (t) an organic dye of sulfonic or carboxylic acid type in the form of an alkali metal or ammonium salt and (II) an aqueous colloidal dispersion of an inorganic material and then drying the coated surface.
本发明提供了一种防止聚合物在反应器壁上结垢的方法,特别是在
乙烯基不饱和单体的悬浮聚合或乳液聚合中,即使聚合
引发剂是在
水中溶解度较高的单体可溶性有机过氧化物,也能有效防止聚合物结垢。该方法包括预先在反应器壁上涂一层
水性涂层组合物,该组合物包括 (t) 一种碱
金属盐或
铵盐形式的
磺酸或
羧酸类有机
染料和 (II) 一种无机材料的
水性胶体分散液,然后将涂层表面干燥。