Properties:... more properties and specification on 1,3-Butanediol, polymer with 1,3-diisocyanato-2-methylbenzene, 2,4-diisocyanato-1-methylbenzene, 2-ethyl-2-(hydroxymethyl)-1,3-propanediol and-alpha-hydro-.omega.-hydroxypoly[oxy(methyl-1,2-ethanediy |