The present invention provides an N-phenylmaleimide compound that can improve the quality of the obtained copolymer by using N-phenylmaleimide containing impurities in specific amounts or less as at least one component of the copolymerization monomers. The N-phenylmaleimide compound of the present invention contains 0.1% by weight or less of N-(2,5-dioxo-1-phenyl-3-pyrrolidinyl)-N-phenylmaleamic acid (PPMA) and/or 0.3% by weight or less of N-phenylfumaramic acid (PFA).
本发明提供了一种N-苯基马来
酰亚胺化合物,通过使用含有特定量或更少的杂质的N-苯基马来
酰亚胺作为共聚物单体的至少一个组分,可以提高所得共聚物的质量。本发明的N-苯基马来
酰亚胺化合物含有0.1重量%或更少的N-(2,5-二氧杂-1-苯基-3-
吡咯烷基)-N-苯基马来酰胺酸(P
PMA)和/或0.3重量%或更少的N-
苯基富马酸(PFA)。