Zinc salt of mono(hydroxybutyl)phthalate [Zn(HBP)2] was synthesized by the reaction of 1,4-butanediol, phthalic anhydride and zinc acetate. Polyurethanes containing zinc ions in the main chain were synthesized by reacting hexamethylene diisocynate (HMDI) or toluylene 2,4-diisocyanate (TDI) with Zn(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 reacting 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, elemental analysis, IR and 1H-NMR spectroscopy, and thermogravimetric analysis.
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Jayakumar et al. (2000) studied this question.
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