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Two-component epoxy resin core coating 7025A/B
Two-component epoxy resin core coating 7025A/B
1. Instructions for use
7025A/B environmental protection series is a room temperature curing epoxy resin, which can be used for the iron core of dry-type transformers. Good insulation performance, good process performance and excellent surface gloss. It is an excellent epoxy resin coating for transformer core covering.
2. Appearance and characteristics
|
|
main agent7025A
|
Hardener7025B
|
| color |
black or blue |
brown or clear liquid |
|
Viscosity40℃（mpa.s）
|
3.0~4.0×104
|
180~270
|
|
density40℃（g/cm3）
|
1.55~1.65
|
1.10~1.20
|
3. Mixing ratio
A:B=100:25 (weight ratio)
Usable time: 25 ℃ × 30-40 minutes (mixing amount of 100 grams)
Curing conditions: The surface can be dry in 4 hours at 25°C, and it can be completely cured in 24 hours.
Fourth, the operation process
1. Cleaning and processing materials;
2. Stir 7025A evenly. After adding 7025B in proportion, use a flat body to fully stir materials A and B. The stirring time is 3-5 minutes. After materials A and B are stirred evenly, they can be used.
5. Characteristics after curing
| Compressive strength |
kg/cm2
|
20~23
|
| Bending strength |
kg/cm2
|
10~12
|
| tensile strength |
kg/cm2 |
16~18 |
|
hardness
|
Shored
|
78~85
|
|
Volume resistance25℃
|
（Ω/cm）
|
1015
|
|
surface resistance25℃
|
（Ω/cm） |
1014 |
6. Packaging
A: 24kg B: 6kg
7. Shelf life and conditions
Dry and ventilated place (shelf life: 6 months)
Eight, matters needing attention
The activation period of this product is 40-50 minutes, please use it now. Pour unused product into unmixed product. The storage period of this product is 6 months. It is normal that there may be a little precipitation during storage. Please stir well before use.
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