Synonyms: Poly(oxy-1,4-butanediyl), .alpha.-hydro-.omega.-hydroxy-, polymer with 2,4-diisocyanato-1-methylbenzene, 2-hydroxyethyl acrylate-blocked poly(oxy-1,4-butanediyl), alpha-hydro- omega -hydroxy-, polymer with 2,4-diisoc;Poly(oxy-1,4-butanediyl), α-hydro-ω-hydroxy-, polymer with 2,4-diisocyanato-1-methylbenzene, 2-hydroxyethyl acrylate-blocked