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    • 3. 发明授权
    • Polyvinyl alcohol polymer production method and polyvinyl alcohol polymer
    • 聚乙烯醇聚合物生产方法和聚乙烯醇聚合物
    • US06743859B2
    • 2004-06-01
    • US09577158
    • 2000-05-24
    • Tsuyoshi KowakaJunji FunakoshiHiroyuki MiyawakiKazunori Watanabe
    • Tsuyoshi KowakaJunji FunakoshiHiroyuki MiyawakiKazunori Watanabe
    • C08F812
    • D01F6/14
    • A method of producing polyvinyl alcohol polymer, with which a high-strength polyvinyl alcohol polymer with a high degree of saponification can be obtained, the polyvinyl ester saponification process can be linked directly with the spinning process, in which the polyvinyl alcohol polymer is made into fiber, the mole ratio of alcohol with respect to the polyvinyl alcohol can be freely selected, and the concentration of the polyvinyl alcohol obtained by the saponification reaction is high. The polyvinyl alcohol polymer that is obtained by this method exhibits a high block character value and is excellent in randomness is provided, wherein a polyvinyl ester is subject to a saponification reaction in an alcohol-containing organic solvent under the presence of a saponification catalyst and the saponification is carried out while distilling off the carboxylic acid ester that is produced by the saponification reaction.
    • 一种生产聚乙烯醇聚合物的方法,通过该方法可以获得高皂化度的高强度聚乙烯醇聚合物,聚乙烯基酯皂化方法可以直接与其中制成聚乙烯醇聚合物的纺丝方法 可以自由选择醇相对于聚乙烯醇的摩尔比,并且通过皂化反应得到的聚乙烯醇的浓度高。 通过该方法获得的聚乙烯醇聚合物显示出高的嵌段特征值,并且提供了无规性优异,其中聚乙烯酯在含醇的有机溶剂中在皂化催化剂存在下进行皂化反应, 在蒸发由皂化反应产生的羧酸酯的同时进行皂化。