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    HIGH-STRENGTH COPOLYMERIZED ARAMID FIBER AND PREPARING METHOD THEREFOR
    6.
    发明公开
    HIGH-STRENGTH COPOLYMERIZED ARAMID FIBER AND PREPARING METHOD THEREFOR 审中-公开
    高强度共聚芳酰胺纤维及其制备方法

    公开(公告)号：EP3184675A1

    公开(公告)日：2017-06-28

    申请号：EP15834440.8

    申请日：2015-08-19

    申请人： Kolon Industries, Inc.

    发明人： GU, Nam Dae ,  RHO, Kyeong Hwan

    IPC分类号： D01F6/80 ,  D01D5/00

    CPC分类号： D01F6/805 ,  C08G69/00 ,  D01D1/02 ,  D01D5/00 ,  D01F1/02 ,  D10B2331/021 ,  D10B2401/061 ,  D10B2401/063

    摘要： The present invention provides a high-strength copolymerized aramid fiber which includes aramid copolymers containing an aromatic group substituted with a cyano group (-CN), so as to have an intrinsic viscosity (IV) of 6.0 to 8.5, a polydispersity index (PDI) of 1.5 to 2.0, a strength of 23 to 32 g/d, and an elastic modulus of 1,100 to 1,300 g/d. The high-strength copolymerized aramid fiber may be prepared by a method which includes, when para-phenylenediamine, cyano-para-phenylenediamine, and terephthaloyl dichloride are sequentially added to an organic solvent and reacted together to prepare a copolymerized aramid fiber, adding and dispersing a neutralizing agent in the organic solvent before the reaction of the para-phenylenediamine, cyano-para-phenylenediamine and terephthaloyl dichloride, which were dissolved in the organic solvent. In the present invention, hydrogen chloride (HCl) generated during polymerization of the para-phenylenediamine, cyano-para-phenylenediamine and terephthaloyl dichloride is directly removed by the neutralizing agent dispersed in the solvent while being changed into a metal salt, and therefore, acid crumbs are not generated but an additional salt is rather generated. As a result, it is possible to prepare an aramid copolymer, which has a high intrinsic viscosity (IV) and a low polydispersity index (PDI) since the gelation is delayed due to the acid crumbs, that is, the reaction time is extended, and which also has excellent solubility in an organic solvent due to the generation of the additional salt. Further, the high-strength copolymerized aramid fiber can be prepared with favorable spin property by using the aramid copolymer even without using sulfuric acid.

    摘要翻译： 本发明提供一种高强度共聚芳族聚酰胺纤维，其特征在于，含有以氰基（-CN）取代的芳香族基团的芳香族聚酰胺共聚物，特性粘度（IV）为6.0〜8.5，多分散指数（PDI） 为1.5〜2.0，强度为23〜32g / d，弹性模量为1100〜1300g / d。 高强度共聚芳族聚酰胺纤维可以通过如下方法制备：将对苯二胺，氰基对苯二胺和对苯二酰氯依次添加到有机溶剂中并一起反应以制备共聚芳族聚酰胺纤维，添加和分散 在对苯二胺，氰基对苯二胺和对苯二甲酰二氯反应之前在有机溶剂中的中和剂溶解在有机溶剂中。 在本发明中，在对苯二胺，氰基对苯二胺和对苯二甲酰二氯的聚合过程中产生的氯化氢（HCl）被分散在溶剂中的中和剂直接除去，同时变成金属盐，因此，酸 不会产生碎屑，但会产生额外的盐。 结果，可以制备具有高特性粘度（IV）和低多分散指数（PDI）的芳族聚酰胺共聚物，因为由于酸屑导致凝胶化延迟，即反应时间延长， 并且由于产生额外的盐而在有机溶剂中也具有优异的溶解性。 此外，即使不使用硫酸，通过使用芳族聚酰胺共聚物也可以制备具有良好旋转性能的高强度共聚芳族聚酰胺纤维。