Isocyanate Adduct Based Two Pack Urethane Coatings from Biological Material

Department of Industrial Chemistry V P & R P T P Science College, S P University, Vallabh Vidyanagar 388 120, India Received: 15 December 1998; accepted: 31 May 1999 The feasibility of using starch and nonedible oil in synthesizing liquid polyols and their reacti on with isocyanate adduct to form urethane coatings has been studied. It is found that the mechanical and chemical properties of the coatings are comparable with that of commercial polyester polyol based urethane coatings and are considerably influenced by the type of oil used with starch in polyol synthesis and the amount of isocyanate, i.e NCO:OH ratio.