Epoxy Resin System for Electrical Casting Low Viscosity Long Pot Life heat curing system
Epoxy Resin 520 is a solvent less Epoxy Resin which in combination with Hardner 509 & Accelerator cures in hard mass
Characteristics
- Low Viscosity
- Long Pot life
- Good mechanical & electrical properties
| Properties | Unit | Epoxy Resin 520 | Hardener 509 | Accelerator |
|---|---|---|---|---|
| Color & App | Colorless / Clear Liquid | Clear Yellow to Haze | Dark Brown Clear | |
| Viscosity by BF at 27°C | mPa.s | 7000 – 14000 | 80 – 60 | 200 – 500 |
| Density at 27°C | g/cc | 1.05 – 1.150 | -- | -- |
| Epoxy equivalent | g/equivalent | 180 – 210 | -- | -- |
Mixing Proportion & Processing
- Epoxy Resin 520 : 100 parts by weight
- Hardner 509 : 80 – 90 parts by weight
- Accelerator : 0.1 – 1.0 part by weight
- Diluent : 10 - 15 parts
- Are mixed well at room temperature 20 – 40°C
- Diluent : 10-15 parts by weight it require
Curing Schedule
- At 80°C : 6 hours +
- At 120°C : 3 hours
Pot Life
- Pot life of the mixture varies with Accelerator Proportion, and storage temperature with 1 part by weight Accelerator
- Pot Life at 80°C : 60 – 70 min
- Gelling Time at 120°C : 12 min
Properties Of Cured Resin
- Specimen cured for 6 hrs at 80°C + 3 hrs at 120°C
| Mechanical Properties | ||
|---|---|---|
| Flexural strength | Mpa | 110 |
| Compressive strength | Mpa | 100 |
| Impact strength | Kg / m2 | 14 |
| Tensile strength | Mpa | 60 |
| Hardness | Shore D | 78 |
| Water Absorption | Mg | 102 |
| Electrical Properties | ||
| Dielectric strength | Kv / mm | 18 |
| Track resistance | CTI | > 600 |
| Volume resistivity at RT 500 V D C | Ohm. Cm | 1015 |
Application
- Epoxy Resin 520 / Hardener 509 / Accelerator is suitable for casting, potting and encapsulation of electrical and electronic components such as switch gears bushing, current a voltage transformers, bus bar support assembly. Due to fast gelling behavior at high temperature TAB systems s ideally suitable for manufacturing of casting by pressure gelation technique
- Recommended for Glass fiber impregnation / lamination by lay up or pultrusion technique
- Ideal for impregnation of electrical machines suitable for temperature class F