Patent ID: 7771521

Claim:
A hyperbranched polyimide-based hybrid material, comprising an organic-inorganic polymer hybrid, which comprises: a hyperbranched polyimide moiety; and an inorganic oxide moiety; wherein: the hyperbranched polyimide moiety and the inorganic oxide moiety are connected via a covalent bond; the organic-inorganic polymer hybrid is obtained by condensation polymerization and cyclodehydration of a hyperbranched polyamic acid comprising a hydroxyl group or an alkoxy group at least one of a plurality of ends; the hyperbranched polyamic acid comprising the hydroxyl group or the alkoxy group is obtained by: reacting an aromatic tetracarboxylic dianhydride and an aromatic triamine to obtain a hyperbranched polyamic acid; and reacting the hyperbranched polyamic acid with an alkoxy compound or a derivative of the alkoxy compound to obtain the hyperbranched polyamic acid comprising the hydroxyl group or the alkoxy group; the alkoxy compound comprises silicon, magnesium, aluminum, zirconium, or titanium and further comprises an amino group or a carboxyl group at an end; and the aromatic triamine compound comprises at least one member selected from the group consisting of tris(3-aminophenyl)amine, tris(4-aminophenyl)amine, tris(3-aminophenyl)benzene, tris(4-aminophenyl)benzene, 1,3,5-tris(3-aminophenoxy)benzene, 1,3,5-tris(4-aminophenoxy)benzene and 1,3,5-tris(4-aminophenoxy)triazine.