“…In contrast, biobased materials have low-life-cycle carbon emissions and can promote carbon neutrality, which is essential for the sustainable development of such coatings . There are many reports on the use of biobased polyols from renewable carbon sources to prepare biobased polyurethane coatings. , Another key component of the waterborne 2K-PU coating, namely the biobased polyisocyanate curing agent, has also been reported . Owing to the increasing attention to environmental protection, energy savings, and emission reduction, in addition to pentamethylene diisocyanate (PDI), biobased diisocyanates such as l -lysine diisocyanate (LDI), 1,16-diisocyanatohexadec-8-ene (HDEDI), and 1,4-butanediisocyanate (BDI) have emerged. − In 2015, Covestro launched the first commercial biobased PDI isocyanurate trimer (PDI-T) curing agent, Desmodur eco N7300, in which approximately 71% of the carbon content is biobased.…”