Epoxy system SR8200 / SD7201 (Slow)

 

Laminating epoxy system SR8200 / SD7201 with slow hardener

Each kilo includes 0.73 kg resin + 0.27 kg hardener

The SR8200 / SD7201 system exhibits very good mechanical properties, high elongation, fatigue resistance, low odor during application and relatively low cost. The maximum temperature resistance is at least 90 ^oC; however, some post curing is required in order to have service temperature of 60 - 70 ^oC. Typical applications include bows, masts and long service bending products.

Slow hardener SD7201:
Reactivity formulated for hand laminating, under press or medium to large parts under vacuum. Requires a post-cure at 55°C to 60°C. Designed for manufacturing of high performance composites and tooling with service temperature of 60°C to 70°C.

PROPERTIES
Physical properties of SR8200 epoxy resin:
Aspect / colour: Yellowish liquid
Viscosity (mPa.s) at 20 ^oC: 2900 ± 600
Density at 20 ^oC: 1.175 ± 0.01

Physical properties of SD7201 hardener:
Aspect / colour: Clear to yellow liquid
Viscosity (mPa.s) at 20 ^oC: 60 ± 15
Density at 20 ^oC: 0.95 ± 0.01

Mix properties of SR8200 / SD7201 system:
Weight ratio: 100 / 37 g
Volume ratio: 100 / 46 ml
Mix viscosity at 20 ^oC: 790 ±150

Reactivity of SR8200 / SD7201 system:

Pot life for 100 g mix at 30 oC: 2 h 56'

Exothermic temperature for 100 g mix at 20 ^oC: 25 ^oC
Time to reach exothermic peak for 100 g mix at 20 ^oC: 8 h