A review on cleaner production of polymeric and nanocomposite coatings based on waterborne polyurethane dispersions from seed oils

Nowadays, waterborne (WE) eco-friendly coatings have received greater attention as an alternative to solvent borne coatings due to their nontoxic and nonflammable behavior along with the emission of lesser or no (volatile organic compounds) VOCs. Several WB coatings such as WB alkyds, water reducible alkyds, WB alkyd-acrylic hybrids, WB polyurethane (PU) dispersions, and their composite latexes have been prepared for sustainable development. Amongst them, WBPU dispersions received increased attention due to their environmental friendliness, excellent physicomechanical, and chemical properties. They can be an excellent replacement for organic solvent-based PU materials which are currently used in printing, inks, adhesives, and coatings industries. A number of renewable resources can be used to prepare WBPU dispersions for various decorative and high-performance coatings applications. This review especially covers the work carried out in the field of seed oil based WBPU dispersions along with WBPU nanocomposite dispersions for decorative and protective coating applications.