Patent ID: 8772417
Filing Date: 2014-07-08
Classification: C08G,C08J,C08L

Abstract:
1. A method for preparing a polyimide membrane comprising: providing a solution containing a solvent and grafted polyimides, the grafted polyimides having molecular weights of 10,000-300,000 and containing monomers A and, optionally, also containing monomers B; each of the monomers A, which are the same or different, having the following formula: and each of the monomers B, which are the same or different, having the following formula: in which wherein, if the grafted polyimides also contain the monomers B, the molar ratio of the monomers B to the monomers A is 0.11 to 99, and a monomer A and a monomer B are linked as follows: