STUDIES ON METAL-CONTAINING POLYURETHANES BASED ON DIVALENT METAL SALTS OF MONO(HYDROXYETHOXYETHYL)PHTHALATE

Abstract

By reacting phthalic anhydride with excess of diethylene glycol and metal acetate, the metal salts of mono(hydroxyethoxyethyl)phthalate were prepared (metal = Cu²⁺, Mn²⁺ and Zn²⁺). Polyurethanes containing metal ions in the main chain were synthesized by reacting hexamethylene diisocyanate (HMDI) or tolulylene 2,4-diisocyanate (TDI) with Cu²⁺, Mn²⁺ and Zn²⁺ salts of mono(hydroxyethoxyethyl)phthalate using di-n-butyltin dilaurate (DBTDL) as catalyst. The prepared monomers and polyurethanes were characterized by FT-IR, ¹H-NMR, ¹³C-NMR, UV spectra, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), elemental analysis, solubility and viscosity studies. The antibacterial activity of these polyurethanes have also been investigated using agar diffusion method.

Keywords:

• Metal salts of mono(hydroxyethoxyethyl)phthalate
• Ionic monomer
• Polyurethanes
• Thermogravimetric analysis
• Differential scanning calorimetry
• Spectral studies
• Antibacterial activity

ACKNOWLEDGMENTS

R. Jayakumar grately acknowledges the award of a Senior Research Fellowship by the C.S.I.R., India for his research work. The authors thank the SIF, IISC, Bangalore for providing ¹H & ¹³C C-NMR spectral analysis.