Patent ID: 11879039
Assignee: HARBIN ENGINEERING UNIVERSITY
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 4:
5. The preparation method for the thermoplastic multi-hybrid polyimide films according to claim 1, wherein the aromatic dianhydride in step S1 and step S2 comprises one or a mixture of pyromellitic dianhydride, dibromo pyromellitic dianhydride, 4,4′-diphenyl ether dianhydride, 3,3′,4,4′-diphenyl ether tetracarboxylic dianhydride, 3,3′,4,4′-diphenyl sulfone tetracarboxylic dianhydride, 3,3′,4,4′-diphenyl tetracarboxylic dianhydride, 3,3′,4,4′-diphenyl ketone tetracarboxylic dianhydride, 2,3,3′,4′-diphenyl ether tetracarboxylic dianhydride, 3,3′,4,4′-triphenyl ether tetracarboxylic dianhydride, 4,4′-(4,4′-isopropyldiphenoxy) tetracarboxylic anhydride, 2,2′-dimethyl-3,3′,4,4′-biphenyltetracarboxylic dianhydride, 2,2′-diphenyl-3,3′,4,4′-biphenyltetracarboxylic dianhydride, and 5,5′-methylenebis (isobenzofuran-1,3-dione).