Synonyms: Oxirane, methyl-, polymer with 1,3-diisocyanatomethylbenzene, .alpha.-hydro-.omega.-hydroxypoly(oxy-1,4-butanediyl) and oxirane;Oxirane, methyl-, polymer with 1,3-diisocyanatomethylbenzene, α-hydro-ω-hydroxypoly( oxy-1,4-butanediyl) and oxirane