Patent ID: 8093349

Claim:
A terminally-modified polybranched polyimide obtained by reacting: component (a): tetracarboxylic dianhydride: component (b): as an amine component, a mixture of a triamine and a diamine, wherein the mixture may be composed of a triamine only; and component (c): as a terminal component, a compound selected from general formulae (1-1) to (1-4); such that at least a part of polymer terminal is derived from the compound selected from the general formulae (1-1) to (1-4); H 2 N—X—R 1 (1-1) wherein, in the general formula (1-1), X represents a single bond or an alkylene group having 1 to 3 carbon atoms; R 1 represents a nitrogen-containing heterocyclic group substituted with any group selected from a substituent group α; and the substituent group α represents hydrogen atom, halogen atom, hydroxyl group, nitro group, carboxylic acid group and salt thereof, sulfonic acid group and salt thereof, ester group, amide group, cyano group, alkyl group, alkoxy group or aryl group; H 2 N—X—R 1 (1-2) wherein, in the general formula (1-2), X represents a single bond or an alkylene group having 1 to 3 carbon atoms; R 1 represents a sulfur-containing heterocyclic group or an aryl group having a thiol or thioether group in the molecule, which are substituted with any group selected from the substituent group α; wherein the substituent group α is as defined in the general formula (1-1); wherein, in the general formula (1-3), R represents a nitrogen-containing heterocyclic group substituted with any group selected from the substituent group α; wherein the substituent group α is as defined in the general formula (1-1); wherein, in the general formula (1-4), R each represents a monovalent residue and have the same meaning as the substituent group α defined in the general formula (1-1); and R may be the same or different each other.