Patent ID: 8075824
Filing Date: 2011-12-13
Classification: C08G,C08J,C08L

Abstract:
1. A process of producing a polyimide film of a multicomponent polyimide comprising the steps of: (1) mixing a polyimide component A and a polyimide component B to prepare a multicomponent polyimide blend solution, the polyimide component A being raw materials of a polyimide A and/or a polyimidation product of the raw materials, and the polyimide component B being raw materials of a polyimide B and/or a polyimidation product of the raw materials, the polyimide components A and B being combined to satisfy the relation: 2.35×N wherein, the absolute difference between solubility parameter SP N (2) subjecting the multicomponent polyimide blend solution to further polyimidation reaction; and (3) removing a solvent from a film of the multicomponent polyimide obtained in step (2).