Synthesis method of polyimide benzoxazole polyamic acid and precursor

摘要

(57) organic liquid, and, SUMMARY polyimide precursor solution comprises the reaction product of an aromatic diamino benzoxazole and aromatic dianhydrides. The reaction product, are capped at chain extender difunctional the end of at least one. One functional group which reacts with the acid anhydride of aromatic dianhydrides or aromatic amines diamino benzoxazole, and does not form an amic acid bond, but chain extender of the difunctional, aromatic diamine and and a functional group of another, which can be further reacted under conditions different from the conditions for forming a polyimide precursor by the reaction of an aromatic diacid anhydride, to increase the molecular weight of the polyimide precursor. I can polyimide precursors are converted to the polyimide benzoxazole polymer.