Title: Synthesis of Polyurethane Coating Using Castor Oil As A Bio-polyol and Its

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Abstract

India is the world largest producer of castor oil. Castor oil is a non-edible oil. Castor oil can be utilized for manufacturing polyurethane due to its inherent structural beauty in terms of presence of OH groups in its structure along with the functionality of 2.7. Hence an attempt has been made by utilizing castor oil as a renewable source of polyol for manufacturing PU coating. In the present work PU coating was prepared by varying the stoichiometric ratio of castor oil and toluene diisocyanate (TDI). The reaction was carried out without catalyst and by using DBTL catalyst separately. The prepared coating samples were characterized for mechanical properties like hardness, scratch resistance, pot life and chemical resistance.