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DEDDM Light Yellow H256 Epoxy Curing Agents CAS No 19900-65-3

Mol No.: 358

Mat no.1000304

Chemical name: 3,3'-diethyl—4,4’-diaminodiphenyl methane



Molecular formula: 254.37.

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Product Details

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Product specification

Appearance: light yellow viscous liquid

Amine value 124 ~ 130mgKOH/g

DEDDM, (w/w) ≥ 97.0%

Active hydrogen equivalent 64

Viscosity (25 ℃) 2000 ~ 5000MPa.s

Moisture ≤ 0.1%

Physical and Chemical Properties

Melting point 45.5-46.5 °C
Boiling point 387.59°C (rough estimate)
Density 1.0344
Refractive index 1.5794
Storage conditions Keep in dark place,Sealed in dry,2-8°C
Acidity coefficient (pKa) 5.10±0.25(Predicted)

Main Application

DEDDM is an aromatic diamine in liquid form, which is easy to use. It is used as a heat-resistant curing agent for epoxy resin adhesive. When mixed with epoxy resin, it has low exothermic temperature and low thermal expansion coefficient. When the epoxy resin was reacted with E-51 at 120 C, the 922.0s gel and 1906.5s solidified slowly, and the maximum peak temperature of the reaction was only 142.3 C. The reference dosage is 30 ~ 34 phr, and the curing condition is 100 ℃ / 2H + 150 ℃ / 4H. The cured product has excellent high temperature resistance and chemical resistance, and there is ethyl in the molecular structure, which can improve the toughness of the cured product. The shrinkage of the cured product was 3.3%, and the water absorption was 0.06%, which were lower than DDM.




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