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isa:196444783
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In the foregoing polyurethanes, at least one polar group selected from ???COOM, ???SO3M, ???OSO3M, ???P???O(OM)2, ???O???P???(OM)2 (in which M is a hydrogen atom or an alkali metal salt), ???NR2, ???N+R2 (in which R2 is a hydrocarbon group), epoxy group, ???SH, and ???CN is preferably introduced in copolymerization or addition reaction.
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isap:215359554
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isa:196444783