| 摘要 |
PROBLEM TO BE SOLVED: To provide a vinylpyrrolidone-based polymer composition improved in the stability of the vinylpyrrolidone-based polymer and also suppressing the decrease of molecular weight (K value) caused by shearing stress. SOLUTION: This vinylpyrrolidone-based polymer composition is provided by containing 1 to 10,000 ppm≥1 kind of a compound selected from a group consisting of biguanides, and further containing 1,000 to 30,000 ppm 2-pyrrolidone and 1 to 5,000 ppm ammonia in the vinylpyrrolidone-based polymer. COPYRIGHT: (C)2008,JPO&INPIT
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