| http://www.w3.org/ns/prov#value | - This monomer may then be copolymerized with materials such as alkylene or arylene diisocyanates, dicarboxylic acids or acids anhydrides to yield polyurethanes and polyesters which may be used to remove acid gases from gas streams and to remove alkali and alkaline earth metal salts from solutions. (I) and (II) themselves may also be used to form complexes with such salts.
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