Trimer fatty acids

Trimer fatty acids (CAS 68937-90-6), also supplied under the trade name Empol 1041, are high-molecular-weight polymerized fatty acids produced by trimerizing C18 unsaturated fatty acids.

They function as reactive building blocks and functional additives across coatings, adhesives, and polymer systems where controlled viscosity and flexible chain structure are commercially valuable.

In polyamide and polyurethane resin synthesis, trimer fatty acids contribute chain flexibility and impact resistance to hot-melt adhesives and structural bonding formulations.

Coatings manufacturers use them to modify rheology and improve film flexibility in alkyd and epoxy-based systems. In lubricant and metalworking fluid formulations, their high molecular weight supports boundary lubrication.

These acids ensure film persistence under load. Plasticizer applications leverage their compatibility with polymer matrices to reduce brittleness in sealants and elastomeric compounds without migrating from the substrate.

Trimer fatty acids are supplied as a viscous liquid, typically amber to dark brown in color, in bulk, IBC, and drum formats. Technical grade is the standard commercial specification.

Purity and acid value are defined per supplier product sheets. Buyers should confirm trimer content percentage and viscosity range when evaluating lots, as these vary between producers and affect resin performance.