Patent ID: 8980241
Filing Date: 2015-03-17
Classification: A23L,A61K,A61P,B82Y,C08F,C08G,C08L

Abstract:
1. A polymerized nitroxide radical compound comprising a poly(ethylene glycol) chain segment in which the repeating unit of ethylene glycol is 15 to 10,000 and a polystyrene chain segment in which the repeating unit of styrene is 3 to 3,000, and at least 10% of the repeating units of styrene in the polystyrene chain segment at position 4 of the phenyl group, a residue of cyclic nitroxide radical compound being covalently bonded through a linking group selected from the group consisting of —CH 2 NH—, —CH 2 NHCH 2 —, —CH 2 O—, —CH 2 OCH 2 —, —CH 2 OCO— and —CH 2 OCOCH 2 —, and when present, the remainder of the position 4 being a halogen atom, a hydrogen atom or a hydroxyl group, and the cyclic nitroxide radical compound being selected from the group consisting of 2,2,6,6-tetramethylpiperidine-1-oxyl-4-yl, 2,2,5,5-tetramethylpyrrolidine-1-oxyl-3-yl, 2,2,5,5-tetramethylpyrroline-1-oxyl-3-yl and 2,4,4-trimethyl-1,3-oxazolidine-3-oxyl-2-yl, 2,4,4-trimethyl-1,3-thiazolidine-3-oxyl-2-yl and 2,4,4-trimethyl-imidazolidine-3-oxyl-2-yl.