Poly(oxy(methyl-1,2-ethanediyl)), alpha-hydro-omega-hydroxy-, ether with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol (3:1), polymer with 2,4-diisocyanato-1-methylbenzene and alpha-hydro-omega-hydroxypoly(oxy(methyl-1,2-ethanediyl))