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

摘要

Castor oil (C) was reacted with commercial epoxy resin (E) (diglycidylether of bisphenol-A, DGEBF) at various mole ratios. The resultant products were designated as CEs. Isocyanate terminated caster oil Polyurethane (ICOPU) was prepared by reaction of caster oil and various proportion of hexamethylene diisocyanate. A commercial alkyd resin was blended with various proportions of CEs and ICOPU. 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.