Non isocyanate route to polyurethanes from polyglycerol five membered polycarbonate

Polyglycerol five membered cyclic carbonate (cpg3) was synthesized from polyglycerol,a by-product of bio-diesel production and dimethyl carbonate (dmc). cpg3 react easily with amines to yield urethane bond using a totally free isocyanate synthetic way. the use of different di and tri-amines allows the formation of polyurethanes with potential broad range of applications. the renewable origin of polyglycerol,the low toxicity of dimethyl carbonate and the experimental conditions developed involving reactions performed in good yield without solvent and without formation of by-products allow envisaging a completely green synthesis of polyurethanes.the aim behind creating polyurethane without using isocyanates has been reached,hence stressing the effectiveness of our approach. in fact,we managed to develop a biocide-free synthesis process by relying on green chemical products such as polygluceril and the dimethyle carbonate. likewise,this process offers a very important advantage concerning the treatment that we aim to develop so as to treat wood then move on to aqueous stage.