| http://www.w3.org/ns/prov#value | - The polyether polymer of the present invention comprises (A) a repeating unit derived from a monomer (I): wherein each of R1 and R2 is a group selected from an alkyl group having 1 to 12 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, an aryl group having 6 to 14 carbon atoms, an aralkyl group having 7 to 12 carbon atoms and a tetrahydropyr
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