Propanoic acid, 3-hydroxy-2-(hydroxymethyl)-2-methyl-, polymer with α-hydro-ω-hydroxypoly[oxy(methyl-1,2-ethanediyl)] and 1,1'-methylenebis[4-isocyanatocyclohexane], 2-oxepanone homopolymer 2-[(1-oxo-2-propen-1-yl)oxy]ethyl ester-blocked