Synonyms: Poly(oxy-1,4-butanediyl), .alpha.-hydro-.omega.-hydroxy-, polymer with 1,1-methylenebis4-isocyanatobenzene;POLYTETRAMETHYLENE-MDI COPOLYMER);Poly(oxy-1,4-butanediyl), 伪-hydro-蠅-hydroxy-, polymer with 1,1’-methylenebis[4-isocyanatobenzene];MDI/ polytetramethylene copolymer