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    • 4. 发明公开
    • 내수성 편광막의 제조 방법
    • 生产耐水偏光膜的方法
    • KR1020100068439A
    • 2010-06-23
    • KR1020107008195
    • 2009-01-23
    • 닛토덴코 가부시키가이샤
    • 미야자키준조마츠다쇼이치니시구치교코
    • G02B5/30C09B31/08
    • B29D11/00644C09B31/072C09B31/08C09B63/005G02B5/3033
    • Disclosed is a process for producing a water-resistant polarizing film that can solve a problem involved in a conventional technique. A conventional polarizing film with an organic coloring matter oriented therein uses an organic coloring matter having a sulfonic acid base comprising a sulfonic acid ion bonded to a monovalent cation. The conventional polarizing film has poor water resistance because the sulfonic acid base in the organic coloring matter is dissolved in water. On the other hand, a water-resistant polarizing film can be formed by replacing a monovalent cation in the sulfonic acid base with a water-insoluble divalent cation.Treatment for imparting water resistance involves a problem of a lowered dichroic ratio. In order to provide a water-resistant polarizing film free from a lowered dichroic ratio, the positional relationship between adjacent sulfonic acid groups or sulfonic acid bases within the organic coloring matter used in the polarizing film, which is to be subjected to the treatment for imparting water resistance, is important. The process for producing a water-resistant polarizing film according to the present invention is characterized in that the polarizing film before the treatment for imparting water resistance contains an organic coloring matter of an azo compound (20) represented by the following general formula (1) or (2).
    • 公开了一种能够解决现有技术中涉及的问题的防水偏振膜的制造方法。 具有取向其中的有机着色剂的常规偏光膜使用具有包含与一价阳离子结合的磺酸离子的磺酸碱的有机色素。 常规的偏光膜由于有机色素中的磺酸碱溶解在水中而具有差的耐水性。 另一方面,通过用水不溶性二价阳离子代替磺酸碱中的一价阳离子,可以形成耐水偏振膜。赋予耐水性的处理方法存在降低的二色性比的问题。 为了提供不具有降低的二色性比的防水偏光膜,在用于施加处理的偏振膜中使用的有机色素内的相邻磺酸基或磺酸碱之间的位置关系 耐水性很重要。 本发明的耐水性偏振片的制造方法的特征在于,赋予耐水性的处理前的偏光膜含有下述通式(1)表示的偶氮化合物(20)的有机色素, 或(2)。