Dilinoleic acid

Dilinoleic acid (CAS 6144-28-1), commercially known as dimer acid or dimer fatty acid, is a dimerized fatty acid produced from linoleic acid; a reactive building block and functional additive for industrial formulations.

Where is Dilinoleic acid used?

• Coatings and adhesives: reacts with polyamines or polyols to produce polyamide resins and polyurethane systems
• Hot-melt and structural adhesives: dimer acid-based polyamides for packaging, woodworking and automotive assembly
• Lubricants and metalworking fluids: corrosion inhibitor and friction modifier protecting ferrous and non-ferrous surfaces under high load
• Plastics: chain extender or plasticizing monomer in specialty polyesters and nylon variants
• Its bifunctional acid structure provides controlled reactivity, flexibility and durability.

Commercial specifications

• Viscous liquid or low-melting solid, depending on purity and dimerization degree
• Acid value, dimer content and monomer levels characterize standard commercial grades
• Dimer purity typically 75% to 98%
• High-purity distilled grades for demanding polymer synthesis