Diethyltoluenediamine (DETDA)

DETDA is diethyltoluenediamine, CAS 68479-98-1, a commercial aromatic diamine isomer mixture. Selected polyurethane and polyurea systems use it as a chain extender, and selected epoxy systems use its amine functionality in curing. It differs from methylthio-substituted DMTDA.

The TDS specifies total diamine ≥98%, 2,4-isomer 75–82%, 2,6-isomer 17–24% and water ≤0.15%. The isomer ranges are supply limits and should be compared with the measured batch composition and equivalent requirement. Colour may darken with time and exposure to air.

For RIM polyurethane and cast elastomer development, evaluate mixing efficiency, reaction speed, equivalent balance and finished hardness, tear and ageing properties. Spray polyurea systems require specific assessment of equipment, working conditions and the complete component balance.

Epoxy curing trials should separately assess viscosity, gel time, cure schedule and finished thermal performance. Keep sealed under the specified nitrogen blanket, above 0°C and protected from air, moisture, sunlight and heat. Standard packing is 200 kg drums or 1,000 kg IBC; the matched reference identifies Class 9, UN 3082.

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