Chemical path to polyurethane polymer Employed in manufacture of spandex. Spandex is mainly made up of a polyurea derived with the reaction of the diol plus a diisocyanate. Two courses of spandex are defined via the "macrodiols". Just one class of macrodiols could be the oligomer manufactured from tetrahydrofuran (i. https://calvins466mgx1.shivawiki.com/user