Rapid production of isocyanate-free, biobased polyurethane foams at ambient temperature

https://phys.org/news/2024-03-rapid-production-isocyanate-free-biobased.html

"using water to generate foaming agent and cyclic carbonates and amines catalyst... cascade reactions spontaneously... both rigid and flexible PU foams without external heat source, high biobased content (70%–90%), produced <2 minutes... part of cyclic carbonates transformed into blowing agent (CO2) expanding matrix, other part contributes to formation, hardening... simple, modular, robust"

Related: Self-Healing and Biodegradable Ionic Polyurethane
https://www.azocleantech.com/news.aspx?newsID=35062