Patent ID: 7977393

Claim:
A polymer composition comprising an oxocarbon and a polymer, wherein the polymer is selected from the group consisting of polyvinyl pyrrolidones, polyesters, polyvinyl pyridines, polybenzimidazoles, polyethersulfones, a copolymer thereof and a mixture thereof, and wherein the oxocarbon is expressed by the following formula (1): wherein X 1 and X 2 each independently represent —O—,—S—or —NR′—, Z represents —CO—, —C(S)—, —C(NR″)—, an alkylene group having carbon atoms of 1-6 that may have a substituent, or an arylene group having carbon atoms of 6-10 that may have a substituent; n represents the number of Z and an integer of 0 (inclusive) to 10; when Z are plural, each of Z may be the same or different each other; R represents —OH, —SH, —NHR′″, an alkyl group having carbon atoms of 1-18 that may have a substituent, an aryl group having carbon atoms of 6-18 that may have a substituent, or an aralkyl group having carbon atoms of 7-16 that may have a substituent; R′, R″ and R′″each independently represent a hydrogen atom, an alkyl group having carbon atoms of 1-6 that may have a substituent, or an aryl group having carbon atoms of 6-10 that may have a substituent; and B represents a hydrogen atom or a monovalent metal atom.