Trimer fatty acids

Trimer fatty acids (CAS 68937-90-6), also marketed as Empol 1041, are high-molecular-weight polymerized fatty acids produced by trimerizing C18 unsaturated fatty acids.

Where is Trimer fatty acids used?

• Coatings, adhesives and polymer systems: reactive building blocks and functional additives for controlled viscosity and flexible chain structure
• Polyamide and polyurethane resins: chain flexibility and impact resistance in hot-melt adhesives and structural bonding
• Alkyd and epoxy coatings: rheology modification and film flexibility
• Lubricants and metalworking fluids: high molecular weight supports boundary lubrication
• Plasticizers: compatibility with polymer matrices reduces brittleness in sealants and elastomeric compounds without migrating from the substrate
• These acids ensure film persistence under load.

Good to know: Buyers should confirm trimer content percentage and viscosity range when evaluating lots, as these vary between producers and affect resin performance.

Commercial specifications

• Purity and acid value are defined per supplier product sheets.