A plywood sample treated with intumescent coating after a flame test—demonstrating charring and fire resistance.

New study shows how lignin enhances the fire-retardant properties of water-based acrylic emulsions.

A recent study published in the Journal of Coatings Technology and Research investigates the effectiveness of intumescent coatings based on water-based acrylic resin and alkaline lignin for flame retardancy on plywood. Testing various lignin concentrations (1%, 3%, 5%, and 10%), the researchers found that a 5% concentration optimally promoted a stable, protective char layer during combustion. This moderate amount of lignin significantly reduced flammability, providing enhanced protection.

Source: european-coatings.com