Researchers develop lignin-based polyurethane for use in adhesives and coatings

lignin has great potential as a polyol precursor for polyurethanes because it is readily available as a by-product of the pulp and paper industry and it has many hydroxyl groups. lignin-based polyurethanes are typically made by reacting modified or unmodified lignin with diisocyanates. however, lignin also has disadvantages, not least that it makes the material…