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    • 3. 发明授权
    • Polyimide for optical communications, method of preparing the same, and method of forming multiple polyimide film using the polyimide
    • 用于光通信的聚酰亚胺,其制备方法以及使用该聚酰亚胺形成多个聚酰亚胺膜的方法
    • US06303743B1
    • 2001-10-16
    • US09441888
    • 1999-11-17
    • Kyung-hee YouKwan-soo HanTae-hyung Rhee
    • Kyung-hee YouKwan-soo HanTae-hyung Rhee
    • C05G7310
    • C08G73/1039C08G73/1014G02B1/045C08L79/08
    • A polyimide for optical communications, which is expressed by the formula (1), a method of preparing the same, and a method of forming multiple polyimide films using the polyimide, wherein the formula (1) is given by X1, X2, X3, A1, A2, B1, B2, B3, D1, D2, E1, E2, Y1, Y2, Y3, Y4, Y5, Y6, Y7, and Y8, are independently selected from the group consisting of hydrogen atom, halogen atom, alkyl group, halogenated alkyl group, aryl group and halogenated aryl group; Z is a simple chemical bond or selected from the group consisting of —O—, —CO—, —SO3—, —S—, —(T)m—, —(OT)m— and —(OTO)m—, wherein T is alkylene or arylene group substituted by at least one of halogen atom and halogenated alkyl group and m is an integer from 1 to 10; and n is an integer from 1 to 39. Because the polyimide expressed by the formula (1) has a lower birefringence than a common polyimide used as a material for optical waveguiding, a problem associated with the dependency of optical characteristics on polarization can be solved. Also, the solubility of the polyimide in an organic solvent is lowered, so that the occurrence of cracks in a polyimide layer can be avoided in the case of forming multiple polyimide films.
    • 一种用于光通信的聚酰亚胺,其由式(1)表示,其制备方法和使用该聚酰亚胺形成多个聚酰亚胺膜的方法,其中式(1)由X 1,X 2,X 3,A 1给出 ,A2,B1,B2,B3,D1,D2,E1,E2,Y1,Y2,Y3,Y4,Y5,Y6,Y7和Y8独立地选自氢原子,卤素原子,烷基 卤代烷基,芳基和卤代芳基; Z是简单的化学键或选自-O - , - CO - , - SO 3 - , - S-, -​​ (T)m - , - (OT)m-和 - (OTO) 其中T是被卤素原子和卤代烷基中的至少一个取代的亚烷基或亚芳基,m是1至10的整数; n是1〜39的整数。由于式(1)表示的聚酰亚胺具有比用作光波导材料的普通聚酰亚胺更低的双折射率,所以可以解决光学特性对极化的依赖性的问题 。 此外,聚酰亚胺在有机溶剂中的溶解度降低,从而在形成多个聚酰亚胺膜的情况下可以避免在聚酰亚胺层中出现裂纹。