1,3-Propanediol, 2,2-dimethyl-, polymer with alpha-hydro-omega-hydroxypoly(oxy-1,4-butanediyl) and 1,1'-methylenebis(4-isocyanatobenzene) 2,2-Dimethyl-1,3-propanediol, alpha-hydro-omega-hydroxy-poly(oxy-1,4-butanediyl), 1,1'-methylene bis(4-isocyanatobenzene)polymer 67712-11-2