Epoxidized linseed oil is a bio-based functional material obtained by epoxidizing linseed oil. It has a high epoxy value, good compatibility, and low volatility. It can be used as a plasticizer/stabilizer, reactive diluent, or crosslinking monomer. In the pursuit of sustainability and low volatile organic compound (VOC) levels, it has the potential to replace petrochemical additives in multiple industries.
- Plastics & Elastomers
- It is primarily used for auxiliary plasticization and thermal stabilization (HCl capture) of soft polyvinyl chloride (PVC), improving heat resistance, migration, and weathering resistance. It can also be used to enhance the flexibility and durability of thermoplastic elastomer (TPE)/polyurethane (PU) systems.
- Coatings & Inks
- It is used as a reactive diluent or resin matrix component in UV/thermosetting epoxy acrylic systems. It exhibits low VOC, chemical resistance, and yellowing resistance, making it suitable for wood, flooring, anti-corrosion coatings, and printing inks. - Adhesives and Sealants
- It can be cured with amines or anhydrides to form a bio-based epoxy network, imparting excellent adhesion, low odor, and media resistance, making it suitable for applications such as construction, automotive interiors, and electronic packaging.
- Rubber Processing
- It can be used as a plasticizer and processing stabilizer for natural rubber (NR), nitrile rubber (NBR), and chloroprene rubber (CR), improving polarity, oil resistance, and low-temperature flexibility while also facilitating uniform mixing and filler dispersion.
- Composites and Bio-Based Resins
- It can be used to prepare some bio-based epoxy matrices and natural fiber composites for applications requiring environmental friendliness and lightweighting, such as transportation interiors, sports equipment, and secondary load-bearing structures.
- Lubricants and Metalworking Fluids
- Leveraging its polar adsorption and film-forming properties, it can be used as an extreme pressure anti-wear additive and a component of biodegradable base oils, suitable for use in drawing/stamping fluids and environmentally friendly gear oil formulations. - Construction & Civil Engineering
- Used as a low-yellowing, low-odor epoxy component in self-leveling flooring, grouting, and waterproofing coatings, improving adhesion and durability to mineral substrates.
- Packaging & Barrier Materials
- Used as a plasticizer/crosslinker for flexible films and metal can linings; food contact applications must comply with applicable regulations and overall migration limits.
In summary, epoxidized linseed oil, due to its renewable origin and versatile chemical properties, has broad application prospects in plastics, coatings, adhesives, rubbers, lubricants, and building materials. Its industrialization requires comprehensive consideration of formulation compatibility, curing process, long-term aging, and regulatory compliance.