Epoxidized linseed oil (ELO) has a broad range of application areas because it combines plasticizing, stabilizing, and reactive functionality in a single bio‑based molecule. Its most important application is in flexible PVC, where it serves as both a secondary plasticizer and a heat stabilizer. In PVC cables, wires, films, flooring, synthetic leather, hoses, gloves, and toys, ELO works alongside primary plasticizers to increase flexibility, reduce brittleness, and improve resistance to heat and UV light. Its epoxy groups capture hydrogen chloride released during PVC degradation, slowing discoloration and loss of mechanical strength.
Another major application is in coatings, paints, and printing inks. Here, ELO can function as a reactive diluent or co‑binder, contributing to lower VOC content, better adhesion, and enhanced chemical and weather resistance. In flexographic and gravure inks for packaging films, it helps improve gloss, rub resistance, and flexibility, while supporting “green” marketing claims due to its vegetable‑oil origin.
ELO also finds application in adhesives and sealants, where it modifies epoxy, polyurethane, or acrylic systems. It can improve impact resistance, elasticity, and adhesion to plastics, metals, wood, and concrete, partially replacing petroleum‑based plasticizers and reactive diluents. In composites and biopolymers, ELO is used as a compatibilizer or flexible segment, helping toughen brittle matrices and increase renewable content.
Emerging application fields include UV‑curable formulations, plasticized starch materials, and biodegradable blends, where the epoxy groups offer sites for crosslinking or grafting. As regulations tighten around traditional phthalate plasticizers, the application of ELO is expected to continue expanding in sustainable material design.