Process to produce polyvinyl-ester compositions with low residual monomer content
申请人:Momentive Specialty Chemicals Research
Belgium S.A.
公开号:EP2740745A1
公开(公告)日:2014-06-11
A process for reducing the amount of residual monomer in aqueous polymerization emulsion by using a sequential polymerization steps, The first step consists in adding an emulsion, of vinyl ester of alkyl of C1 to C18 carboxylic acids, to water containing a radical initiator, the second step consists in adding further an emulsion of alkyl acrylate and/or methacrylate, and the third step consists in c) adding to polymeric emulsion, resulting of the steps a)and b), pure liquid acrylate or methacrylate with alkyl chain of C1 to C12.
第一步是将 C1 至 C18 羧酸烷基乙烯基酯乳液加入含有自由基引发剂的水中,第二步是进一步加入丙烯酸烷基酯和/或甲基丙烯酸酯乳液,第三步是 c) 向步骤 a) 和 b) 产生的聚合物乳液中加入具有 C1 至 C12 烷基链的纯液体丙烯酸酯或甲基丙烯酸酯。