Synonyms: 1,3-Butanediol, polymer with .alpha.-butyl-.omega.-hydroxypolyoxy(methyl-1,2-ethanediyl) and 1,3-diisocyanatomethylbenzene;1,3-Butanediol, polymer with .alpha.-butyl-.omega.-hydroxypoly[oxy(methyl-1,2-ethanediyl)] and 1,3-diisocyanatomethylbenzene Polyurethane polymer;TDI/ polypropylene-butylene glycol copolymer