1,3-Butanediol, polymer with alpha-hydro-omega-hydroxypoly(oxy(methyl-1,2-ethanediyl)), 1,1'-methylenebis(4-isocyanatocyclohexane) and alpha,alpha',alpha''-1,2,3-propanetriyltris(omega-hydroxypoly(oxy(methyl-1,2-ethanediyl))) 67816-04-0