Synthesis and characterization of polyurethanes and polyurethane-ureas based on zinc salt of mono(hydroxybutyl)phthalate

Zinc salt of mono (hydroxybutyl)phthalate [Zn(HBP)(2)] was synthesized by t he reaction of 1,4-butanediol, phthalic anhydride and zinc acetate. Polyure thanes containing zinc ions in the main chain were synthesized by reacting hexamethylene diisocynate (HMDI) or toluylene 2,4-diisocyanate (TDI) with Z n(HBP)(2) using di-n-butyltindilaurate (DBTDL) as catalyst. Four different bisureas were prepared by reacting ethanolamine or 2-amino-2-methylpropanol with HMDI or TDI. Zinc containing polyurethane-ureas were synthesized by r eacting HMDI or TDI with 1:1 mixture of Zn(HBP)(2) and each of the bisureas . Zn(HBP)(2) and the polymers were characterized by solubility study, eleme ntal analysis, IR and H-1-NMR spectroscopy, and thermogravimetric analysis.