The polyurethanes (PUs) were prepared by polycondensation of modified castor oil (MCO) [Castor oil-succinic anhydride-penaerythritol reaction product], commercial acrylate polyols (AP) and Isophorone diisocyanate (IPDC) at various properties. The resultant PUs were then treated with monocarbinol terminated polydimethyl siloxane (MTPS) to neutralize –NCO groups. The resultant PU coatings were applied on MS steel panels at room temperature. All the PU coatings were characterized by physical, chemical and mechanical properties.