Patent ID: 7094853

Claim:
A crosslinked polymer having a tertiary amine and/or a quaternary ammonium salt structure, said crosslinked polymer has a tertiary amine structure at either end of at least one crosslink structure and essentially has a crosslink structure represented by the following general formula (1): wherein R 1 , R 2 , R 3 and R 4 are the same or different and each represents a hydrogen atom, a halogen atom, an alkyl group containing 1 to 10 carbon atoms, or a hydroxyl group; R 5 , R 6 , R 7 and R 8 are the same or different and each represents a hydrogen atom, a halogen atom, a methyl group, or an ethyl group; a and b are the same or different and each represents an integer of 0 to 10; and p represents 0 or 1; with the proviso that the relation a+b+p≧1 is satisfied; Z represents an —NH—, —N (CH 3 )—, 1, 4-piperazinylene, —NH—(CH 2 ) 3 —NH—, —NH—(CH 2 ) 4 —NH—, —O—, —O—(CH 2 ) 2 —O—, —O—CH 2 —C (CH 3 ) 2 —CH 2 —O—, —O—(CH 2 ) 2− —(O—CH 2 —CH 2 ) n1 —O—, 3-methyl-2, 6-pyridyl, 4-methyl-2, 6-pyridyl, 2, 6-pyridyl, 2, 5-pyridyl, or —CH (OH) —: n1 represents an integer of not less than 0.