Abstract
With a global production of around 18 million tons (6th among all polymers) and a wide range of applications such as rigid and soft foams, elastomers, coatings and adhesives, Polyurethanes (PUs) are one of the major polymer family. Nevertheless, they present important environmental and health issues. Recently, new and safer Polyurethanes, called NonIsocyanate Polyurethanes (NIPUs), have become a promising alternative to replace conventional PUs. Sustainable routes towards NIPUs will be discussed in this review from a green chemistry perspective. This paper will mainly focus on the reaction between biobased carbonates and amines which offers an interesting pathway leading to renewable Polyhydroxyurethanes (PHUs). The overview of the different routes for PHUs synthesis will draw attention to the green synthesis of cyclic carbonate (CC) compound and the aminolysis reaction. A state-of-the-art of different biobased building-blocks for PHUs synthesis will focus on CC compounds. Three classes of compounds will be defined according to the feedstock with (i) vegetable fats and oils, (ii) starch and sugars resources, and (iii) wood derivatives. Finally, biobased PHUs properties will be discussed.