2-Propenoic acid, 2-hydroxyethyl ester, polymer with 1,1'-methylenebis(4-isocyanatocyclohexane) and alpha,alpha',alpha''-1,2,3-propanetriyltris(omega-hydroxypoly(oxy(methyl-1,2-ethanediyl))) 73324-00-2 74755-91-2