| http://www.w3.org/ns/prov#value | - 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.
|
