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
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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
  • RoHS-compliant 2011/65/EU
  • Polybromited diphenylether 2003/11/EU
  • REACh-compliant 2006/121/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 6 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 2 h
  150 °C 1 h
Trickle Feed Process 130 °C 15-30 min.
  150 °C 15-20 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

Mechanical
Property Unit of measure Values  Test method 
Bond strength of twisted coils room temperature  200 ± 40 IEC 60455-2, test method A acc. IEC 61033
Bond strength of twisted coils 155 °C  57 ± 10 IEC 60455-2, test method A acc. IEC 61033
Shore D hardness room temperature    76 ± 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  app. 50-130 DSC-method
Volume shrinkage  8.6 Company standard Energy Solutions-003
Chemical
Property Conditions  Values  Test method 
Resistance  Distilled water, transformer oil resistant IEC 60455-2, test method acc. ISO
Resistance  solvent vapours under test company standard Energy Solutions - Voltatex® 019
Liquid phase
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  
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
Electrical
Property Unit of measure Typ. values  Test method 
Dielectric strength at 23 °C and 50 % r.h.  kV/mm  70 IEC 60455-2, test method acc. IEC 60243-1
Dielectric strength at 155 °C  kV/mm  60 IEC 60455-2, test method acc. IEC 60243-1
Dielectric strength at 23 °C after 96 h storage at 92 % r.h.  kV/mm  52 IEC 60455-2, test method acc. IEC 60243-1
Dielectric strength at 105 °C after 168 h oil immersion  kV/mm  67 IEC 60455-2, test method acc. IEC 60243-1
Specific volume resistance at 155 °C  Ω*cm  3.6x10^10 IEC 60455-2, test method acc. IEC 60093
Specific volume resistance at 180 °C  Ω*cm  3.5x10^10 IEC 60455-2, test method acc. IEC 60093
Specific volume resistance after 7 d water immersion  Ω*cm  1.8x10^15 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    3.8 ± 0.6 IEC 60455-2, test method acc. IEC 60250-1
Loss factor at 155 °C and 50 Hz    150x10^-3 IEC 60455-2
Loss factor cross section 0.2=200x10^-3  °C  178 IEC 60250, between 50 Hz and 1 MHz