SynChem – Resins & Varnishes Voltatex® 4204 1-component impregnating resin
Voltatex® 4204 is a low emission, environmentally friendly, ready-to-use impregnating, yellowish 1K dip resin based on unsaturated polyesterimide resins.
- single component
- low emission
- very low viscosity
- environmentally friendly
- minimum exposure in the working area
- no risk of fire or explosion
- based on renewable raw materials
The cured resin compound is characterised by:
- very low tendency to crack
- very good adhesion
Application
- electric motors
- generators, also for large drives
- transformers
- in particular for mica tape insulated flat rolled litz wires
- suitable for: insulation systems of thermal class 180 (H)
- suitable for applications in medium and high voltage area
Standards
- UL approved, file no.: E 101752 (M) Unterwriters Laboritories Inc., USA
- Temperature Index 180 (H) in acc. with IEC 60085
- Polybromited diphenylether 2003/11/EU
- UL 1446 approved:
| Twisted Pair | ASTM D2307 | MW 35:180 |
| MW 80:155 | ||
| Helical Coil | ASTM D2519 | MW 35:200 |
| MW 80:180 |
Delivery forms
Voltatex® 4204 is supplied in one-way-cans containing 25 kg or 200 kg.
Storage
The resin can be stored for up to 8 months at max. 25 °C if sealed correctly in original containers. Opened containers have to be resealed and protected against direct sunlight!
Hardening
Voltatex® 4204 is a low emission product, nevertheless to minimize evaporation of reactive components during curing; the impregnated objects should be heated up to curing tempera-ture in the shortest possible time. The air flow in the curing oven should also be kept to the minimum permitted by safety considerations.
Curing times:
| Dip & Bake Process | 130 °C | 0.5-1 h |
| 150 °C | 15-30 min. | |
| Trickle Feed Process | 130 °C | 15-20 min. |
| 150 °C | 10-15 min. |
Protection
Cured Voltatex® 4204 is biologically inactive and not dangerous to health. When processing the liquid resin, please refer to the Material Safety Data Sheet (MSDS) for Voltatex® 4204.
Cleaning
Cured Voltatex® 4204 is almost insoluble. Therefore, application equipment should be regularly cleaned with cleaner Voltatex® T050. All equipment cleaning and maintenance should be carried out in accordance with the equipment manufacturers instructions.
Processing
The impregnating resin can be applied by using
- all kind of conventional dip & bake equipment
- continuous, vacuum dip and VPI processes
- dip & roll equipment
- trickle feed machines
Unlimited tank stability with resin Voltatex® 4204 can be achieved as long as the material is kept below 25 °C and at least 20 % of the tank content is used and replaced with fresh resin per month.
Technical data
| Property | Unit of measure | Values | Test method |
|---|---|---|---|
| Bond strength of twisted coils room temperature | N | 200 ± 40 | IEC 60455-2, test method A acc. IEC 61033 |
| Bond strength of twisted coils 155 °C | N | 57 ± 10 | IEC 60455-2, test method A acc. IEC 61033 |
| Shore D hardness room temperature | 70 ± 5 | IEC 60455-2, test method acc. ISO 868 | |
| Water absorption | % | 0.6 | Company standard Energy Solutions-015, acc. ISO 62 |
| Glass transition temperature | °C | 55-75 | DSC-method |
| Volume shrinkage | % | Company standard Energy Solutions-003 |
| Property | Conditions | Values | Test method |
|---|---|---|---|
| Resistance | solvent vapours | under test | IEC 60455-2, test method acc. ISO |
| Resistance | Distilled water, transformer oil | resistant | company standard Energy Solutions - Voltatex® 019 |
| Property | Unit of measure | Typ. values | Test method |
|---|---|---|---|
| Dielectric strength at 23 °C and 50 % r.h. | kV/mm | 60-85 | IEC 60455-2, test method acc. IEC 60243-1 |
| Dielectric strength at 155 °C | kV/mm | 55-80 | IEC 60455-2, test method acc. IEC 60243-1 |
| Dielectric strength at 23 °C after 96 h storage at 92 % r.h. | kV/mm | 35-75 | IEC 60455-2, test method acc. IEC 60243-1 |
| Dielectric strength at 105 °C after 168 h oil immersion | kV/mm | 70-110 | IEC 60455-2, test method acc. IEC 60243-1 |
| Specific volume resistance at 180 °C | Ω*cm | 10^11-10^12 | IEC 60455-2, test method acc. IEC 60093 |
| Specific volume resistance after 7 d water immersion | Ω*cm | 10^14-10^16 | IEC 60455-2, test method acc. IEC 60093 |
| Creep resistance | CTI 600 M | IEC 60455-2, test method acc. IEC 60112 | |
| Dielectric constant at 23 °C between 50 Hz and 1 MHz | 3.9 ± 0.4 | IEC 60455-2, test method acc. IEC 60250-1 | |
| Loss factor at 155 °C and 50 Hz | 140x10^-3 - 200x10^-3 | IEC 60455-2 | |
| Loss factor cross section 0.2=200x10^-3 | °C | 150-180 | IEC 60250, between 50 Hz and 1 MHz |
| Property | Unit of measure | Conditions | Values | Test method |
|---|---|---|---|---|
| Impact on enamelled wires | compatible with all common magnet wires | IEC 60851-4 | ||
| Viscosity | mPas | at 25 °C | 315 ± 25 | DIN 53019 |
| Viscosity | mPas | at 40 °C | 130 ± 25 | DIN 53019 |
| Reaction process gel time | min | 100 °C | 9.6 | company standard Energy Solutions-014 |
| Reaction process reaction time | min | 100 °C | 11.6 | company standard Energy Solutions-014 |