Patent ID: 7994258

Claim:
A hyperbranched polymer comprising at least one organic radical structure (nitroxyl group) of Formula (1), Formula (2) or Formula (3): and having a weight average molecular weight measured by gel permeation chromatography in a converted molecular weight as polystyrene of 500 to 5,000,000, wherein the hyperbranched polymer has a structure of Formula (4): [where each R 1 is independently a hydrogen atom or a methyl group, each A 1 is independently a group of Formula (5) or Formula (6): (where A 2 is a C 1-30 linear, branched or cyclic alkylene group which optionally contains an ether bond or an ester bond; and X 1 , X 2 , X 3 and X 4 are independently a hydrogen atom, a C 1-20 alkyl group, a C 1-20 alkoxy group, a halogen atom, a nitro group, a hydroxyl group, an amino group, a carboxyl group or a cyano group), each E is independently a hydrogen atom, a halogen atom or a structure of Formula (7), Formula (8) or Formula (9): {where X − is Cl − , Br − , I − , PF 6 − , BF 4 − or a perfluoroalkanesulfonate; R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 and R 11 are independently a hydrogen atom, a C 1-5 alkyl group, a C 1-5 hydroxylalkyl group or an organic radical structure of Formula (1), Formula (2) or Formula (3); R 8 is a C 1-5 alkyl group, a C 1-5 hydroxylalkyl group, a C 7-12 arylalkyl group or a group of Formula (10) or Formula (11): (where R 12 is an organic radical structure of Formula (1) or Formula (2); R 13 is a hydrogen atom or an organic radical structure of Formula (1) or Formula (2); R 14 is an organic radical structure of Formula (1) or Formula (2); and m is 1 to 5)}, with the proviso that at least one E has an organic radical structure of Formulae (1) to (3), and n is the number of repeating unit structures which is an integer of 2 to 100,000].