公开(公告)号：EP4455174A1

公开(公告)日：2024-10-30

申请号：EP22911283.4

申请日：2022-12-21

申请人： Tosoh Corporation ,  Kai Photonics Co., Ltd.

发明人： YAMADA, Satoru ,  WATANABE, Misaki ,  KATAGIRI, Fumiaki ,  KITAGAWA, Takahiro ,  SAKASHITA, Ryuichi ,  KOIKE, Yasuhiro

IPC分类号： C08F222/40 ,  C08F2/18 ,  C08F2/20 ,  C08F22/40 ,  C08F210/00 ,  C08F212/06 ,  C08F218/04 ,  C08F220/18 ,  C08L33/24 ,  C08L35/00

摘要： It is an object to provide a method for efficiently producing an N-alkylmaleimide-based polymer that has an excellent optical characteristic, excellent heat resistance, and excellent mechanical strength. A method for producing an N-alkylmaleimide-based polymer in accordance with an aspect of the present invention includes using an oil-soluble radical polymerization initiator to carry out suspension polymerization, in an aqueous medium in the presence of at least one dispersant selected from the group consisting of a nonionic compound having no hydrogen bonded to oxygen or nitrogen, a polyacrylate salt, and a polyalkylene glycol, with respect to a monomer mixture consisting of 20% by weight to 100% by weight of N-alkylmaleimide and 0% by weight to 80% by weight of other copolymerizable monomers, the N-alkylmaleimide being represented by the following general formula (1):

where R represents a C1-C12 linear alkyl group, a C3-C12 branched alkyl group, or a C3-C6 cyclic alkyl group.