Preparation of Polyurethane Using Non-Isocyanate Synthesis and Their Composites with Cellulose Nanocrystals

ANDRÉS IGNACIO CORDERO; JAVIER IGNACIO AMALVY; CHIACCHIARELLI LEONEL MATIAS; ELENA FORTUNATI; D. PUGLIA; JOSE MARIA KENNY

Workshop; II Workshop on Bio-degradable Polymers and Biocomposites III Workshop BIOPURFIL, Bio-based Polyurethane Composites with Natural Fillers; 2015

Polyurethanes (PU) are versatile polymers and used in several industrial applications. They are prepared conventionally from diisocyanates and polyols. However isocyanates are toxic components and the PU production is considered as toxic and dangerous and rules to limit isocyanates are being evaluated including on the List of Undesirable Substances (LOUS). For that reason the PU production using non-isocyanate sources have been researched in the last years. On way of producing non-isocyanate polyurethanes (NIPUs) is based on the reaction of polycyclic carbonates and polyamines and several papers were published on the practical application including coatings, sealants and adhesives and some reviews have been also published. In these works NIPU is obtained by the reaction of cyclic bis-carbonate with amines. By combining PU with nanomaterials, improved mechanical, as well as other properties, is expected. While the incorporation of microcellulose in biobased PU was already considered , no example can be found in the literature in which the effect of cellulose nanocrystals introduction on non-isocyanate PU systems was considered.