SynChem – Resins & Varnishes Voltatex® 4201 1-component-resin

Voltatex® 4201 is a low emission, ready-to-use impregnating 1K dip resin, based on unsaturated polyesterimide resins.

  • single component
  • low emission
  • minimum exposure in the working area
  • no classification as dangerous goods

The cured resin compound is characterised by:

  • very good adhesion
  • high thermomechanical strength, also when sustained loading is applied
  • hard and tough
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Application

Suitable for:

  • insulation systems of thermal class 220 (R)
  • electric motors, also large-scale machines
  • high speed rotors
  • transformers, especially with thick wires and shaped conductors

Standards

  • UL-File-Nr.: E 101752 (M) Underwriters Laboritories Inc., USA
  • Isolation-system temperature of thermal class 220 (R) acc. to IEC 60085:2007
  • Temperature Index in acc. with IEC 60455-3-5, Type 220, testing method in acc. with IEC 60216
  • Polybromited Diphenylether 2003/11/EU
  • RoHS-compliant 2011/65/EU
  • REACh-compliant 2006/121/EU
  • Temperature class acc. to UL 1446:
Twisted Pair ASTM D2307 MW 30:200
    MW 35:220
Helical Coil ASTM D2519 MW 30:240
    MW 35:220

Insulation-system acc. to UL 1446 (IEC 61858):

Class 130 C190HE
  R150HE
  Z130HE
  Z150HE
Class 155 C290HE
  CZ255HE
  R201HE
  R203HE
  Z200HE
Class 180 R342HE
  R342HE2

Delivery forms

The dip resin is delivered in 25 kg one-way-cans.

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 daylight!

Hardening

Voltatex® 4201 is a low emission product, nevertheless to minimize evaporation of reactive components during curing; the impregnated objects should be heated up to curing temperature 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 at 130 °C 2 h
  at 150 °C 1 h
Trickle Process at 130 °C 15-30 min
  at 150 °C 10-15 min

 

Protection

Voltatex® 4201 is biologically inactive and safe to health. Implement normal protective measures when processing the liquid dip resin: See the Material safety data sheet (MSDS).

Cleaning

Cured Voltatex® 4201 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 manufacturer’s instructions.

Processing

The impregnating resin can be applied by using all kind of conventional dip and bake equipment, continuous and vacuum dip process, VPI process and trickle feed process is also possible. Unlimited tank stability with resin Voltatex® 4201 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 Value  Test method 
Bond strength of twisted coils room temperature  240 ± 30 IEC 60455-2 test method A acc. IEC 61033
Bond strength of twisted coils 130 °C  90 ± 10 IEC 60455-2 test method A acc. IEC 61033
Bond strength of twisted coils 155 °C  78 ± 10 IEC 60455-2 test method A acc. IEC 61033
Bond strength of twisted coils 180 °C  70 ± 10 IEC 60455-2 test method A acc. IEC 61033
Shore D hardness room temperature    78 ± 5 IEC 60455-2 test method acc. ISO 868
Thermal
Property Unit of measure Condition  Value  Test method 
Temperature index  °C    220 IEC 60455-3-5, test method acc. IEC 60216
Testing voltage  °C  IEC 60317-8/MW-35 222 IEC 60172
Testing voltage  °C  IEC 60317-8/MW 30 212 IEC 60172
Bond strength  °C  IEC 60317-8/MW 35 229 IEC 61033, method B, final point 22 N
Bond strength  °C  IEC 60317-8/MW 30 238 IEC 6103, method B, final point 22 N
Heat conductivity  W(m*k)^-1    0.23 based on DIN 501046
Chemical
Property Conditions  Value  Test method 
Resistance  refrigerants/cooling machine oil systems R22, Shell 22-12 resistant UL 984-41
Resistance  Transformer oil, distilled water, 5 % soap-flock-dilution resistant IEC 60455-2, test method acc. ISO 175
Impact on enamelled wires    compatible with all common enamelled wires  
Liquid phase
Property Unit of measure Value  Test method 
Gel time  min  8.7 reaction process at 100 °C acc. company standard Energy Solutions - 001^1)
Reaction time  min  9.9 reaction process at 100 °C acc. company standard Energy Solutions - 001^1)
Viscosity  mPas  900 ± 200 at 25 °C acc. DIN 53019
Electrical
Property Unit of measure Value  Test method 
Dielectric strength at 23 °C and 50 % r.h.  kV/mm  ≥ 80 IEC 60455-2, test method acc. IEC 60243-1
Dielectric strength at 155 °C  kV/mm  ≥ 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  ≥ 80 IEC 60455-2, test method acc. IEC 60243-1
Dielectric strength at 105 °C after 168 h oil immersion  kV/mm  ≥ 90 IEC 60455-2, test method acc. IEC 60243-1
Specific volume resistance at 23 °C  Ω*cm  ≥ 10^15 IEC 60455-2, test method acc. IEC 60093
Specific volume resistance at 155 °C  Ω*cm  ≥ 10^10 acc, IEC 60455-2, test method acc. IEC 60093
Creep resistance    CTI 600 M acc. IEC 60455-2, test method acc. 6.2 IEC 60112
Dielectric constant at 23 °C between 50 Hz and 1 MHz    4.0 ± 0.5 acc. IEC 60455-2, test method acc. IEC 60250
Loss factor at 23 °C from 50 Hz and 1 MHz    ≤30x10^-3 IEC 60455-2, test method acc. IEC 60250
Loss factor cross section 0.2=200x10^-3  °C  ≥135