| 摘要 |
<p>Cation exchangers or chelating agents characterized by at least comprising structural units of general formula (I) and structural units derived from a cross-linking monomer having an unsaturated hydrocarbon group [wherein A is C3-C8 alkylene or C4-C9 alkoxymethylene; L is SO3-X+ (wherein X+ is a counter ion coordinating to the SO¿3?- group) or a chelate-forming functional group; and the benzene ring may be substituted with alkyl or halogenol]. The cation exchangers or chelating agents are excellent in heat resistance, scarcely causing exudation even when blended with resins by virtue of their high chemical stability, and are also satisfactory in reaction rate.</p> |
