Propanoic acid, 3-hydroxy-2-(hydroxymethyl)-2-methyl-, polymer with 2-(2-aminoethyl)aminoethanesulfonic acid monosodium salt, 1,4-butanediol, 1,6-diisocyanatohexane, diphenyl carbonate, 1,6-hexanediol and 5-isocyanato-1-(isocyanatomethyl)-1,3,3-trimethylc