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Dimer Acid (CAS 61788-89-4) is a bio-based chemical made by linking two C18 fatty acid chains. It confers flexibility, water resistance, and toughness to polymers. Its primary use is reacting with amines to form 'Polyamide Resins' used in hot melt adhesives and flexographic inks. It is also used to make 'Polyamide Hardeners' for epoxy coatings.
Listings vary by Dimer content (Standard ~78% vs High Purity ~95%) and Monomer/Trimer impurity levels.
Hot melt polyamide adhesives
Epoxy curing agents (Polyamides)
Flexographic ink binders
Corrosion inhibitors & Esters
Corrosion inhibitor base
Flexible polyester synthesis
Leading petrochemical producers
Ready stock at Ports
Compliant transport
Generally non-toxic and biodegradable. May cause mild skin/eye irritation. Spills are slippery and difficult to clean (viscous oil).
It is made from 'Tall Oil Fatty Acid' (TOFA), a byproduct of the paper industry, or from Oleic Acid (Vegetable Oil). It is 100% bio-based.
Epoxy resins are brittle. Adding a hardener made from Dimer Acid (Polyamide) makes the epoxy flexible and tough, perfect for marine coatings.
Dimer (C36) is two chains linked. Trimer (C54) is three. Trimer adds cross-linking (hardness) but increases viscosity. High purity Dimer is preferred for linear polymers.
Yes, very. It flows like honey or heavy motor oil, especially in cold weather.