| 摘要 |
PURPOSE:To obtain a water-soluble polymer which can be used as a flocculant or a paper-making chemical at good efficiency without gelation by (co) polymerizing an N-vinylcarboxylic acid amide, adding hydroxylamine to the reaction mixture, and hydrolyzing the product with an acid. CONSTITUTION:An N-vinylcarboxylic acid amide of the formula (wherein R is H or CH3) or a mixture thereof with another copolymerizable water-soluble vinyl compound [e.g. (meth)acrylonitrile] is polymerized, hydroxylamine is added to the reaction mixture, and the product is hydrolyzed with an acid to produce a water-soluble polymer. According to this process, a water-soluble polymer of an N-vinylcarboxylic acid amide can be produced at good efficiency without gelation, and it can be extensively used as a flocculant, a paper-making chemical or the like in many industrial fields. |
