81972-34-1 Ethanol, 2,2'-(1,4-phenylenebis(oxy))bis-, polymer with alpha-hydro-omega-hydroxypoly(oxy-1,4-butanediyl) and 1,1'-methylenebis(4-isocyanatocyclohexane) Poly(tetramethylene ether)glycol, hydroquinone bis(beta-hydroxyethyl)ether, methylenebis(4-cyclohexylisocyanate) polyurethane