首页>
外国专利>
Process for preparing a tough, soluble, aromatic, thermoplastic copolyimide
Process for preparing a tough, soluble, aromatic, thermoplastic copolyimide
展开▼
机译:制备坚韧,可溶,芳族,热塑性共聚酰亚胺的方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A process for preparing a tough, soluble, aromatic, thermoplastic copolyimide is provided. The process comprises the steps of (a) providing 4,4'-oxydiphthalic anhydride to 3,4,3',4'- biphenyltetracarboxylic dianhydride at a mole ratio ranging from about 25 mole percent to 75 mole percent to 75 mole percent to about 25 mole percent; (b) adding 3,4'- oxydianiline to form a mixture; c) adding a polar aprotic or polar protic solvent to the mixture to form a solution having a percentage of solids capable of maintaining polymer solubility; (d) stirring the solution to allow it to react; (e) adding an azeotropic solvent to the solution and heating to remove water; (f) cooling the solution of step (e) to room temperature and recovering the tough, soluble, aromatic, thermoplastic copolyimide.
展开▼