R202-M Low Frequency Non-Benzen Insulation Lacquer (Raw Water)
1.Product Profile
The insulating impregnated paint is made of modified polyester resin, amino resin, auxiliaries and solvents.
All vertical water with good dry permeability and mechanical and electrical properties, film drying speed, low curing temperature, strong adhesion, is a low-frequency electronic transformer coil dedicated to all vertical water, also suitable for B small motor electrical coil impregnation insulation treatment.
2. Technical indicators
Serial number | Indicator name | Units | Indicator values | |
1 | Appearance | - | Light yellow transparent liquid, lacquer solution should be dissolved evenly, no mechanical impurities, dry film smooth. | |
2 | Viscosity (4# viscometer ,23±1ºC) | S | ≥40 | |
3 | Density (25ºC) | g/cm3 | 0.97±0.05 | |
4 | Solid content (105±2ºC/2 h) | % | ≥45 | |
5 | Paint drying time 105±2ºC | h | ≤0.5 | |
6 | Curing ability of thick layers | - | Better than S.1U1I4.2Uniformity | |
7 | Stability of lacquer in closed container (50ºC,96 h) | - | Lacquer must not be white or turbid, viscosity increase not more than 4 times the initial value | |
8 | The effect of lacquer on enamelled wire | - | Hardness of pencil not less than H | |
9 | Elastic, core shaft diameter 3 mm | - | No cracking | |
10 | Electrical strength | Normal | KV/mm | ≥70 |
After 24 h immersion | ≥40 | |||
11 | Volume resistivity | Normal | Ω·cm | ≥1.0×1014 |
After 24 h immersion | ≥1.0×1012 | |||
12 | Corrosion of paint to insulating tape | - | No discoloration, no degumming | |
13 | Heat resistance | ºC | ≥130 | |
Note :1, for the special requirements of different customers, it can be added or reduced appropriately in the inspection items, for example, when the customer has moisture-proof requirements, the damp-heat test of the transformer after impregnation should be carried out regularly. 2. items 10,11,12 paint film baking conditions for the first paint in 120±2ºC baking 2 h, the second paint in 120ºC2 baking 6 3. diluent: special diluent. 4. the storage period of this product is 6 months. | ||||
3.Impregnation reference process:
Pre-workpieces According to the needs of the customer, the pre-drying condition of the workpiece is 80-90ºC1-2 hours.
The temperature is 50-60ºC when the workpiece is immersed in paint, and 10 min (is good when it is immersed in paint under normal pressure.
Drop paint 10 min
bake first air-dried for 1-2 hours, then bake for 4-6 hours ºC80-110 according to the size of the workpiece (transformer).