JEFFAMINE® D-205 amine is a difunctional primary amine with oxyalkylene units. It is designed to be a low amine hydrogen equivalent weight polyetherdiamine with slower curing speed than conventional polyetheramines. It is well fit for applications where low viscosity, low exotherm and longer pot life are desirable.

For applications where a slower curing speed is beneficial, JEFFAMINE D-205 amine is similar in AHEW and structure to JEFFAMINE D-230 amine. However, its primary amines are more hindered, making it slower to react with epoxy groups. JEFFAMINE D-205 amine is a good choice for epoxy applications where longer open time and a low exotherm are highly desired.

Features & Benefits

• Low viscosity, color, and vapor pressure
• Lower exotherm and longer pot life than other low molecular weight polyetheramines
• Excellent mechanical properties
• Relatively high glass transition temperature

Performance Data

When combined with a general purpose diglycidyl ether of bisphenol A (DGEBA) liquid epoxy resin, JEFFAMINE D-205 amine is used at a slightly lower level than JEFFAMINE D-230 amine and gel time is around four hours longer than that with the D-230 amine system. Typical cured resin properties for a standard DGEBA liquid epoxy resin with JEFFAMINE D-205 amine or JEFFAMINE D-230 amine are compared in this table.

Properties

Amine hydrogen equivalent weight, g/eq…….. 58
Flash point, PMCC, °C / °F ………………. 121/250
Density, g/ml, 25°C …………………….. 0.943
Density, lb/US gallon, 25°C ……………… 7.87
Viscosity, cP, 25°C …………………….. 7