Patent ID: 6303743
Filing Date: 2001-10-16
Classification: C08G,G02B

Abstract:
A polyimide for optical communications, expressed by the formula: ##STR19##X.sub.1, X.sub.2, X.sub.3, A.sub.1, A.sub.2, B.sub.1, B.sub.2, B.sub.3, D.sub.1, D.sub.2, E.sub.1, E.sub.2, Y.sub.1, Y.sub.2, Y.sub.3, Y.sub.4, Y.sub.5, Y.sub.6, Y.sub.7, and Y.sub.8, 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--, --SO.sub.2 --, --S--, --(T).sub.m --, --(OT).sub.m -- and -- (OTO).sub.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.