wherein each of R37 and R38 independently represents a linear or branched alkylene group having from 1 to 6 carbon atoms, each of X27 and X28 independently represents an oxygen atom or an alkylene glycol group having from 1 to 6 carbon atoms, and E24 is a bivalent group derived from a diisocyanate selected from the group consisting of saturated aliphatic, alicyclic and aromatic diisocyanates (prov