1,3-Benzenedicarboxylic acid,hydrazides,dihydrazide,polymer with R-hydro-ö-hydroxypoly(oxy-1,4-butanediyl),1,1'-methylenebis[4-isocyanatobenzene] and 2,2'-(methylimino)bis[ethanol]
1,3-Benzenedicarboxylic acid,hydrazides,dihydrazide,polymer with R-hydro-ö-hydroxypoly(oxy-1,4-butanediyl),1,1'-methylenebis[4-isocyanatobenzene] and 2,2'-(methylimino)bis[ethanol]