Propanoic acid, 3-hydroxy-2-(hydroxymethyl)-2-methyl-, polymer with 1,6-diisocyanato-2,2,4-trimethylhexane, 1,6-diisocyanato-2,4,4-trimethylhexane, 1,2-ethanediamine, 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, α-hydro-ω-hydroxypoly(oxy-1,4-butanediyl) and 2-oxepanone, compd. with N,N-diethylethanamine