SynChem – Resins & Varnishes Voltatex® 4230 1-component-resin

Voltatex® 4230 is a low emission, ready-to-use impregnating, yellowish 1K dip resin based on unsaturated polyesterimide resins.

  • single component
  • low emission
  • minimum exposure in the working area
  • excellent impregnating result and high efficiency due to structural-viscose behaviour

The cured resin compound is characterised by:

  • low tendency to crack
  • very good adhesion
  • good elasticity
  • high thermal and mechanical strength, even under extreme long-term stress

 

 

 

 

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Application

  • electric motors, also for large drives
  • transformers, especially with thick wires and shaped conductors
  • suitable for: insulation systems of thermal class 220 (R)

Standards

  • Insulating systems up to thermal class H acc. to IEC 60085
  • Temperature index according to IEC 60455-3-5: Type 220
  • UL listed, file no.: E 101752 (M)
  • Polybrominated diphenylether 2003/11/EU
  • RoHS-compliant 2011/65/EU
  • REACh-compliant 2006/121/EU
  • UL approved with enamelled Cu wire

Temperature class according

Twisted Pair ASTM D2307 MW 30:200
    MW 35:220
Helical Coil ASTM 2519 MW 30:240
    MW 35:220

Electrical insulation systems according to UL 1446 (IEC 61858):

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

Delivery forms

Voltatex® 4230 is supplied in one-way-cans containing 25 kg. Additionally 1000 kg containers (returnable) are available (not for oversea export).

Storage

The resin can be stored for up to 4 months at max. 25 °C if sealed correctly in original containers. Opened containers have to be resealed and protected against direct daylight!

Hardening

Voltatex® 4230 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: 2h
at 150 °C: 1h

Protection

Cured Voltatex® 4230 is biologically inactive and not dangerous to health. When processing the liquid resin, please refer to the Material Safety Data Sheet (MSDS) for Voltatex® 4230.

Cleaning

Cured Voltatex® 4230 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 & bake equipment
  • continuous and vacuum dip processes
  • VPI process

Voltatex® 4230 generally offers specific advantages such as very low evaporation losses in impregnating tanks, high resin retention on impregnated objects and low draining losses while curing. Related to the structural-viscose behaviour the resin requires convection prior to the impregnating process in order to provide a reasonable penetration into the winding.

Unlimited tank stability with resin Voltatex® 4230 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  240 ± 30 IEC 60455-2, test method A acc. IEC 61033
Bond strength of twisted coils 130 °C  80 ± 15 IEC 60455-2, test method A acc. IEC 61033
Bond strength of twisted coils 155 °C  70 ± 15 IEC 60455-2, test method A acc. IEC 61033
Bond strength of twisted coils 180 °C  55 ± 10 IEC 60455-2, test method A acc. IEC 61033
Shore D hardness room temperature    80 ± 5 IEC 60455-2, test method acc. ISO 868
Water absorption  0.3-0.7 IEC 60455-2, test method 1 acc. ISO 62 after 96h at 23 °C
Thermal
Property Unit of measure Values  Test method 
Temperature index  °C  220 IEC 60455-3-5, test method acc. IEC 60216
Bond strength IEC 60317-8  °C  MW 30: 238 IEC 61033, method B, final point 22 N
Bond strength IEC 60317-13  °C  MW 35: 229 IEC 61033, method B, final point 22 N
Testing voltage IEC 60317-8  °C  MW 30: 212 IEC 60172
Testing voltage IEC 60317-13  °C  MW 35: 222 IEC 60172
Heat conductivity  W(m*k)^-1  0.23 acc. DIN 51046
Chemical
Property Conditions  Values  Test method 
Resistance  transformer oil, distilled water, 5 % soap-dilution resistant IEC 60455-2, test method acc. ISO 175
Resistance  Hexane, methanol, actone, xylene resistant company standard Energy Solutions 019
Liquid phase
Property Unit of measure Values  Test method 
Impact on enamelled wires    Compatible with common enamelled wires acc. IEC 60851-4
Viscosity  mPas  700-1300 at 25 °C acc. DIN 53019
Reaction process gel time  min  9.5-15.0 10 °C, company standard Energy Solutions-001
Reaction process reaction time  min  10.0-16.0 10 °C, company standard Energy Solutions-001
Electrical
Property Unit of measure Condition  Values  Test method 
Dielectric strength at 23 °C and 50 % r.h.  kV/mm    100-125 IEC 60455-2, test method acc. IEC 60243-1
Dielectric strength at 155 °C  kV/mm    75-110 IEC 60455-2, test method acc. IEC 60243-1
Dielectric strength at 23 °C after 96 h storage at 92 % r.h.  kV/mm    75-100 IEC 60455-2, test method acc. IEC 60243-1
Dielectric strength at 105 °C after 168 h oil immersion  kV/mm    95-145 IEC 60455-2, test method acc. IEC 60093
Specific volume resistance at 155 °C  Ω*cm    10^9 - 10^11 IEC 60455-2, test method acc. IEC 60093
Specific volume resistance  Ω*cm  at 180 °C 10^9 - 10^11 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    typ. value CTI 275M - 0.4 IEC 60455-2, test method acc. IEC 60112
Dielectric constant at 23 °C between 50 Hz and 1 MHz      4.0 ± 0.5 IEC 60455-2, test method acc. IEC 60250
Loss factor cross section 0.2=200x10^-3  °C    110-150 IEC 60455-2, test method acc. IEC 60250, between 50 Hz and 1 MHz