M. Ponzelli1, R. Moreno1, I. Etxeberria2, A. Artola2, A. Barrio2, N. Mattar3, W. Pitacco4, L. Staccioli5, O. Reyes5, J. Gallego5, C. Pagella6, I. Deligkiozi1 This project has received funding from the Bio-based Industries Joint Undertaking (JU) under the European Union’s Horizon 2020 research and innovation programme under grant agreement No 101023342. The JU receives support from the European Union’s Horizon 2020 research and innovation programme and the Bio-based Industries Consortium. BIO-BASED SUSTAINABLE COATINGS WITH LIGNIN RESINS FOR ENHANCED PERFORMANCE AND ENVIRONMENTAL IMPACT 1 AXIA Innovation GmbH, Fritz-Hommel-Weg 4, 80805, Munich, Germany 2 TECNALIA, Mikeletegi Pasealekua 2 Parque Científico y Tecnológico de Gipuzkoa, 20009 Donostia-San Sebastian, Gipuzkoa, Spain 3 ECOAT, ZI Des Bois De Grasse, 1 avenue Louison Bobet, 06130, Grasse, France 4 AEP Polymers SRL, AREA Science Park, Strada Statale 14, km 163.5, 34149 Basovizza, Trieste, Italy 5 ARDITEC Association, 7 Av. De Fabron, 06200, Nice, France 6 IRIS Coatings SRL, Via Novi 42, 15060, Basaluzzo (AL), Italy @LIGNICOAT BBI Project @LIGNICOAT BBI Project www.lignicoat.eu info@lignicoat.eu Sustainable coatings based on lignin resins and bio-additives with improved fire, corrosion and biological resistance Materials and Methods Introduction and Background Coatings play a crucial role in our daily existence by offering protection, enhancing aesthetics, and providing functionality to different surfaces. Nevertheless, the environmental repercussions associated with coatings derived nowadays from fossil fuels and the emission of volatile organic compounds (VOCs) have prompted concerns. Towards the road of defossilization and the creation of a sustainable bioeconomy, the LIGNICOAT project is developing innovative lignin-based resins and coatings. Lignin, a by-product of lignocellulosic biomass, is a natural polymer that can be used as a building block for producing biobased resins. LIGNICOAT particularly targets biobased coating with enhanced properties in terms of fire, corrosion, and antimicrobial resistance. 1 Materials: The development of biocoatings includes: • Bio-PUD resins, synthesized from lignin polyols *. • Phosphorous-based flame-retardant additives. FR water-borne biocoatings are applied on wood substrates as an FR alternative to market solvent-borne coating (CHAR18, IRIS Coatings). Methods: • Hardness by Persoz Pendulum. • Transparency and colour by colorimetry. • Fire performance evaluation by cone calorimeter on particleboard (PB) at a heat flux of 35 kW/m2. INTERMEDIATES LIGNIN RESINS COATINGS • Kraft Lignin • Organosolv Lignin Fire protection Anti-corrosion Anti-microbial, anti-viral & VOCs degradation • Lignin Polyols • Lignin Polyacids • Epoxidized Lignin • Polyurethane • Alkyd • Epoxy • Wood • Metal • Bio-PUD coatings without any FR additives (Bio_1 and Bio_2) showed even worse fire resistance behaviour than the PB without coating. • FR additives (P or Cl) significantly improved the fire performance of Bio-PUD coatings (Bio+FR_1, Bio+FR_2, and Bio+FR_3). • The developed FR water-borne biocoatings have similar fire performance to the market benchmark in terms of heat release. • The biocoating Bio+FR_3 could be a suitable candidate for replacing fossil-based ones as a 26%, and 38% improvement of the maximum average rate of heat emission (MARHE) was noticed compared to the market reference and the PB with no coating, respectively. Coating Composition NCO % Bio- based tIGNITION (s) HRR Peak (kW/m2) MARHE (kW/m2) TSP (m2) Persoz Hardness (s) Colour dE*ab (D65) No coating - - - 67 208 89 2.3 - - Market Solvent-borne PU 2K (10% Cl) HNCO 0% 67 176 75 3.5 115 2.4 Bio_1 Bio_PUD - 46% 43 197 95 3.4 55 17.4 Bio_2 Bio_PUD HNCO 42% 45 214 94 2.5 62 17.2 Bio+FR_1 Bio_PUD + 15%P + 3%Cl HNCO 47% 35 179 67 2.4 29 12.6 Bio+FR_2 Bio_PUD + 15%P + 3%Cl Bio- HNCO 50% 38 186 73 2.9 19 17.8 Bio+FR_3 Bio_PUD + 20%P + 1%Cl HNCO 47% 41 137 55 2.3 26 16.5 0,00 1,00 2,00 3,00 4,00