会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 71. 发明授权
    • Melt processable thermotropic wholly aromatic polyester
    • 熔融加工热性全芳族聚酯
    • US4083829A
    • 1978-04-11
    • US789374
    • 1977-04-20
    • Gordon W. CalundannHerbert L. DavisFrederick J. GormanRobert M. Mininni
    • Gordon W. CalundannHerbert L. DavisFrederick J. GormanRobert M. Mininni
    • C08G63/60D01F6/84C08G63/06C08G63/18
    • D01F6/84C08G63/60
    • A wholly aromatic polyester is provided which has been found to be highly amenable to melt extrusion to yield high performance fibers. Such fibers following thermal treatment exhibit high tenacity and tensile modulus properties which are well retained at elevated temperatures while exhibiting a low degree of shrinkage. Unlike wholly aromatic polyesters normally encountered in the prior art, the polymer of the present invention is not intractable and may be melt extruded with ease at temperatures below approximately 300.degree. C., and preferably below approximately 280.degree. C. The aromatic polyester of the present invention consists essentially of recurring units (a) p-oxybenzoyl moiety, (b) 2,6-dicarboxynaphthalene moiety, (c) symmetrical dioxy aryl moiety (as defined), and (d) isophthaloyl moiety and/or metal-dioxy phenylene moiety, and is free of units which possess ring substitution. The wholly aromatic polyester of the present invention forms an atypical thermotropic melt phase which is exhibited in the absence of ring substitution at a relatively low temperature which facilitates fiber formation with ease. The wholly aromatic polyester of the present invention following melt spinning and thermal treatment commonly can exhibit an average single filament tenacity of at least 15 grams per denier, and an average single filament tensile modulus of at least 300 grams per denier.
    • 提供了一种全芳族聚酯,已被发现是高度易于熔融挤出以产生高性能纤维。 热处理后的这种纤维表现出高强度和拉伸模量性能,它们在升高的温度下良好地保持,同时表现出低的收缩率。 与现有技术中通常遇到的全芳族聚酯不同,本发明的聚合物不难处理,并且可以在低于约300℃,优选低于约280℃的温度下容易地熔融挤出。本发明的芳族聚酯 本发明基本上由重复单元(a)对羟基苯甲酰部分,(b)2,6-二羧基萘部分,(c)对称的二氧基芳基部分(如所定义))和(d)间苯二酰部分和/或金属二氧基亚苯基部分 并且没有具有环取代的单元。 本发明的全芳族聚酯形成非典型的热致熔融相,其在相对较低的温度下在不存在环取代的情况下表现出来,这便于轻松形成纤维。 熔融纺丝和热处理后本发明的全芳族聚酯通常可显示至少15克/旦尼尔的平均单丝强度,平均单丝拉伸模量至少为300克/旦尼尔。