SynopsisPolyurethanes containing the polyether backbone were found to give superior adhesives at cryogenic temperatures as compared to epoxy resins. However, the adhesives showed poor performance at 250 and 400°F. T4e adhesives were prepared from 2,4-toluene diisocyanate (TD1)-terminated polyether polyols and cured with 3,3'-dichloro-4,4'diaminodiphenylethane (MOCA, du Pont). The addition of free TDI caum an increase in elevated temperature strength when an equivalent amount of MOCA was used.