SynChem – Resins & Varnishes Synthite AC-43 Air drying varnish
Synthite AC-43 is a clear, air drying electrical insulation varnish on basis of modified polyester, suitable for class H.
Synthite AC-43 has the following excellent properties:
- UL-approved
- very fast air drying
- excellent chemical resistance
- solderable
- excellent adhesion
- good penetration
- transformer oil resistance ASTM D 155-55
- corrosion and humidity resistance
Application
Typical applications for Synthite AC-43 are:
- stators
- printed circuit boards
- form wound coils
- resistors
- transformers
- capacitors
Standards
Class H (180 °C) UL-file-no. OBOR2.E317427 and OBJS2.EB17429.
| Magnet wire | Twisted pairs | Helical coils |
| MW 24-C | 155 °C | 155 °C |
| MW 28-C | 130 °C | 130 °C |
| MW 35-C | 180 °C | 180 °C |
Delivery forms
Colour: clear
4.5 kg, 22.5 kg and spray bottles on request.
Storage
Synthite AC-43 can be stored at room temperature and in closed containers for up to 24 months (max. 30 °C). The varnish has to be stored in cold, dry places, protected against direct sunlight.
Hardening
Air drying time (on copper plate):
10 min. - set to touch
Protection
Use in well ventilated area, aboid contact with skin and eyes and wear protective clothes. Please observe the safety data sheet.
Processing
Synthite AC-43 may be applied by dipping, brushing or spraying as supplied.
For fast conveyor application, the following cycle is recommended:
1. Preheat units for 10 min. at 110 °C
2. Dip into the varnish for 30 sec.
3. Drain 10-20 min.
4. Bake 60-90 min. at 110 °C
For this type of cycle Synthite AC43 should be diluted 10-15 % with Dolph's® T-200 thinner.
You have questions according to our resins and varnishes or want to send an inquiry?
Our product manager will be happy to help you.
Technical data
| Property | Unit of measure | Conditions | Values | Test method |
|---|---|---|---|---|
| Coating thickness | µm | 75-100 | ASTM D-115-55 |
| Property | Unit of measure | Conditions | Value | Test method |
|---|---|---|---|---|
| Dielectric strength | kV/mm | dry / 25 °C | 80 | ASTM D-115 |
| Dielectric strength | kV/mm | after 24h water storage / 25 °C | 48 | ASTM D-115 |
| Creep resistance | CTI | 600 | IEC 60112 |
| Property | Conditions | Blistering | Rusting | Cracking | Test method |
|---|---|---|---|---|---|
| Resistance | Water | no | no | no | ISO 4628/2-3-4 |
| Resistance | 10 % Sulfuric acid | no | no | no | ISO 4628/2-3-4 |
| Resistance | 1 % Sodium hydroxide | no | no | no | ISO 4628/2-3-4 |
| Resistance | Salt water | no | no | no | ISO 4628/2-3-4 |
| Property | Unit of measure | Conditions | Values | Test method |
|---|---|---|---|---|
| Viscosity | s | 25 °C | 50-70 | ISO Cup 4 |
| Viscosity | s | 25 °C | 18-24 | Ford Cup 4 |
| Specific density | g/cm³ | 25 °C | 0.87-0.93 |