2-Propenoic acid, 2-methyl-, 2-hydroxyethyl ester, polymer with alpha-(1-oxo-2-propenyl)-omega-((1-oxo-2-propenyl)oxy)poly(oxy-1,2-ethanediyl) 94772-40-4 Poly(hema-bga) Poly(hydroxyethylmethacrylate bisglycolacrylate)