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发明公开
CN106715493A 改性聚乙烯醇和水溶性膜 有权

改性聚乙烯醇和水溶性膜
摘要：
本发明提供冷水溶解性和强度、硬度等实用物性优异、能够抑制耐化学试剂性等各物性随着时间经过而降低的水溶性膜、以及该水溶性膜中使用的改性聚乙烯醇。本发明涉及改性聚乙烯醇，其包含具有2个羧基的单体单元0.05~10摩尔%，1H‑NMR分析中的6.8~7.2ppm的积分值（X）和5.3~5.5ppm的积分值（Y）的值满足下述式。0.60≤X/（X+Y）
摘要（英）：

The present invention provides: a water-soluble film that has excellent cold water solubility and practical properties such as strength and body and is able to limit the reduction of various physical properties such as chemical resistance over time; and a modified polyvinyl alcohol used in said water-soluble film. The present invention relates to a modified polyvinyl alcohol, which is obtained by comprising 0.05-10 mole% of monomer units with two carboxyl groups and for which the integrated value (X) for 6.8-7.2 ppm and the integrated value (Y) for 5.3-5.5 ppm in 1H-NMR analysis satisfy the formula below. 0.60 <= X/(X+Y) < 1.0

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