Description
Ergo 7490 is a black, toughened, pasty epoxy adhesive for application with composite or metal
parts. The adhesive provides excellent strength build up after a long pot life, very good heat
resistance as well as remarkable mechanical properties over a broad temperature range.
7490 fulfills the requirements according to DIN EN 45545-2 chart 5, R1, R7 and R17 with HL1-3.
Advantages
• High toughness
• Excellent adhesion to composite materials and metals
• High strength at elevated temperatures
• Solvent-free, good chemical resistance
• Minimum gap 75 µm (Spacer)
Physical properties (liquid product)
Chemical base Epoxy resin adhesive
Curing System 2-component-ystem
Mixing ratio (volume) 2 : 1 (resin : hardener)
Mixing ratio (weight) 2.24 : 1 (resin : hardener)
Shelf life 24 month at 5 – 23 °C
Viscosity acc. to DIN EN 12092 (Cone-Plate-System, Cone 25, shear rate 35 s-1
, 23 °C)
Resin 7438 70’000 – 90’000 mPa•s
Viscosity acc. to DIN EN ISO 2555 (Spindle measurement, 25 °C)
Hardener 7489 (Spindle 7, 2.5 rpm) 200’000 – 350’000 mPa•s
(Spindle 7, 20 rpm) 40’000 – 60’000 mPa•s
Viscosity Mixture Pasty, thixotropic
Colour Resin 7438 White
Hardener 7489 Black
Mixture Black
Density Resin 7438 ~ 1.19 g/cm³
Hardener 7489 ~ 1.07 g/cm³
Mixture ~ 1.15 g/cm³
Minimum gap / Spacer 75 µm
Curing properties
Pot life (23 °C) ~ 2 hours
Final strength (23°C) ~ 5 days
Test method
DIN EN 1465
At 23 °C At 60 °C
Fixture time
(>1 N/mm2
)
~ 8.5 hours ~ 40 minutes
Functional time
(> 10 N/mm2
)
~ 15 hours ~ 65 minutes
