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Surface Coating Studies of Polyurethane Derived from [(Alkyd)-(EpoxyResin Treated Caster Oil)]Isocyanate Terminated Caster Oil Mixture

Dinesh. P. Patel , Kiran. S. Nimavat and Kartik. B. Vyas

Castor oil (C) was reacted with commercial epoxy resin (E) (diglycidylether of bisphenol-A, DGEBA) at various mole ratios. The resultant products were designated as CEs. Isocyanate terminated caster oil Polyurethane (ICOPU) were prepared by reaction of caster oil and various proportion of hexamethylene diisocyanate. A commercial alkyd resin was blended with various proportion of CEs and ICBPU. A unique solvent system, which shows a one phase clear solution and a clear coat of binder system, was used. All the blends were applied on mild steel panels and characterized for drying time, adhesion, flexibility, hardness, impact resistance and chemical resistance properties.