-
公开(公告)号:US11597696B2
公开(公告)日:2023-03-07
申请号:US17268270
申请日:2018-09-25
发明人: Satoru Miyazawa , Yusuke Kuramoto , Asuka Sano , Ryo Nadano , Shinya Akiba , Makoto Kobayashi
摘要: The present invention is directed to a purification method for purifying a fluorine-containing polymerizable monomer of the formula (1), in which the fluorine-containing polymerizable monomer is purified by distillation in the coexistence of a phenolic compound A such as 6-tert-butyl-2,4-xylenol and a phenolic compound B such as 2,2′-methylene-bis(4-methyl-6-tert-butylphenol). By the combined use of the phenolic compound A and the phenolic compound B, it is possible to significantly suppress polymerization or oligomerization of the fluorine-containing polymerizable monomer even during industrial-production-scale distillation and efficiently purify the fluorine-containing polymerizable monomer by distillation.