| http://www.w3.org/ns/prov#value | - Preferably, a binder such as a urethane resin which is a polymer having, as a functional group, ???COOH, ???SO3M, ???OSO3M, ???P???O(OM)3, ???O???P???O(OM)2 [wherein M is a hydrogen atom, an alkali metal base or an amine salt], ???OH, ???NR1R2, ???N+R3R4R5 [wherein R1, R2, R3, R4 and R4 are, each independently the same or different, a hydrogen atom or a hydrocarbon group], or an epoxy group is use
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