| 摘要 |
PROBLEM TO BE SOLVED: To provide a process for producing an N-vinylpyrrolidone graft polymer which can have an improved degree of vinyl monomer grafting and can hydrophilize the surface of a plastic base, etc., and to provide the N-vinylpyrrolidone graft polymer. SOLUTION: The invention relates to the process for producing the N-vinylpyrrolidone graft polymer comprising a process reacting a vinyl monomer to the N-vinylpyrrolidone polymer, wherein the N-vinylpyrrolidone polymer to be reacted as a raw material is regulated so as to have a 2-pyrrolidone content of 10,000 ppm or lower. COPYRIGHT: (C)2007,JPO&INPIT
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