| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for preventing yellowing and coloration of an aromatic compound polymer after the reaction in an amidomethylation reaction of an aromatic compound polymer. SOLUTION: The reaction temperature at the time of amidomethylation of the aromatic compound polymer is controlled at 6°C or lower, preferably 5°C or lower thereby to prevent yellowing and coloration of the product. COPYRIGHT: (C)2008,JPO&INPIT
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