SynChem – Resins & Varnishes Dolphon® XL-2102 OPT 1K Resin

Dolphon® XL-2102 OPT is a 1K resin based on polyester.

Dolphon® XL -2102 OPT is characterised by the following properties:

  • UL-approved
  • very low weight loss on cure
  • very low odour
  • excellent wetting properties
  • good bond strength
  • fast curing cycles
Download datasheet


Dolphon® XL-2102 OPT is a trickle resin which can also be used as a fast curing dip resin for

  • armatures
  • rotors
  • stators


  • UL-approved class H (180 °C), File OBOR2.E317427, OBJS2.E317429
  • UL-System-approved from 130 - 220 °C
  • UL-approved with magnet wire

temperature class acc. UL 1446:

magnet wire Twisted pairs Helical coils
MW 16-C 220 °C -
MW 28-C 130 °C -
MW 35-C 180 °C 200 °C

Delivery forms

Dolphon® XL-2102 OPT is delivered in 25 kg disposable containers or in 230 kg barrels.


Dolphon® XL -2102 OPT can be stored for 18 months at room temperature in a sealed container (max. 30 °C).
The trickle and dip resin must be stored in a cold place and protected against direct sunlight, UV radiation and sources of heat.
Always observe general rules and regulations.


Since the cured trickle and dip resin is practically insoluble, the tools have to be cleaned as soon as possible with a suitable solvent. Maintenance and care impregnating plants, especially cleaning, must be carried out according to operational requirements. Always refer to the user manual of the plant.


Exemplary impregnating process suggestion:

1. Pre-heat the object to approx. 105-120 °C
2. Trickle the resin on the unit, keeping it in slow rotation
3. Cure at 150-160 °C for 20-30 min

1. Pre-heat the object to 80-90 °C
2. Roll the object in the resin
3. Bring rapidly the object to a temperature of 140 °C to gel the resin
4. Bake for about 30 min at 140-150 °C

Pre-heating is not necessary if the object is dry. Times apply when the object temperature has been reached.

Technical data

Property Unit of measure Conditions  Values  Test method 
Weight loss  15 g of resin at 100-140 °C for 20 min < 1.3  
Gel time  min  at 100 °C 8-20  
Bond strength  25 °C >180 IEC 61033, HC
Bond strength  80 °C >90 IEC 61033, method B, HC, MW 35
Bond strength  155 °C >30 IEC 61033, HC
Property Unit of measure Value  Test method 
Thermal class  °C  130 TP MW 28-C
Thermal class  °C  180 TP MW 35-C
Temperature index  °C  200 HC MW 35-C
Temperature class  °C  220 TP MW 16-C
Flashpoint  °C  >130
Property Unit of measure Conditions  Value  Test method 
Water absorption  90 min at 100 °C < 1.5 ASTM D 570
Water absorption  24h at 25 °C < 1 ASTM D 570
Resistance    Xylene, Methanol, Hexane yes IEC 60464 part 2
Resistance    10 % hydrochloric acid < 2.5 % ISO 175 - 7 days
Resistance    30 % sulfuric acid < 1.5 % ISO 175 - 7 days
Resistance    Transformer oil < 0.5 % ISO 175 - 7 days
Liquid phase
Property Unit of measure Bedingungen  Werte  Prüfmethode 
Specific density  g/l  at 25 °C 1150±50  
Viscosity  at 25 °C 100-150 Ford Cup 4
Viscosity  at 25 °C 70-100 ISO Cup 6
Property Unit of measure Value  Test method 
Dielectric strength  kV/mm  >128 ASTM D-115, 25 °C
Volume resistivity  Ω x cm  >10^15 IEC 60464-2
Volume resistivity  Ω x m  >10^12 IEC 60464-2 part 2, after 7 days water immersion
Dielectric constant    3.3 ASTM D-150. 25 °C
Surface resistivity  Ω  >10^15 IEC 60464-2