Carbonic acid, diphenyl ester, polymer with 1,4-butanediol, 1,6-hexanediol, α-hydro-ω-hydroxypoly[ oxy(methyl-1,2-ethanediyl)] and 1,1'-methylenebis[4-isocyanatobenzene]

Carbonic acid, diphenyl ester, polymer with 1,4-butanediol, 1,6-hexanediol, .alpha.-hydro-.omega.-hydroxypolyoxy(methyl-1,2-ethanediyl) and 1,1-methylenebis4-isocyanatobenzene