71010-72-5 Butanamide, 4-hydroxy-N-(2-hydroxyethyl)-N-methyl-, polymer with alpha-hydro-omega-hydroxypoly(oxy-1,2-ethanediyl), 1,3-isobenzofurandione and1,1'-methylenebis(4-isocyanatocyclohexane), 2-hydroxyethyl acrylate-blocked