1,4-Butanediol polymer with 1,3-diisocyanatomethylbenzene,α-hydro-ω-hydroxypoly(oxy-1,4-butanediyl) and α-hydro-ω-hydroxypoly[oxy(methyl-1,2-ethanediyl)]
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1,4-Butanediol polymer with 1,3-diisocyanatomethylbenzene,α-hydro-ω-hydroxypoly(oxy-1,4-butanediyl) and α-hydro-ω-hydroxypoly[oxy(methyl-1,2-ethanediyl)]
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