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SynChem – Resins & Varnishes

Dolphon® XL-2112 single-component resin

Dolphon® XL-2112 is a low emission single-component resin based on polyester.


Dolphon® XL-2112 has the following known properties:

  • UL-approved
  • excellent wetting properties
  • good bond strength
  • very low weight loss on cure
  • very low odour
  • relatively fast cure cycles
  • medium-low viscosity

Dolphon®XL-2112 is a proven resin for impregnating large stators, rotors, transformers and coils, even in very demanding applications with impact loads.

  • UL-approved class H (180 °C), File OBOR2.E317427 and
  • UL-System-approved from 130-220 °C
  • UL-approved with magnet wire
  • temperature class acc. UL 1446:
magnet wire Twisted pairs
MW 16-C 220 °C
MW 35-C 200 °C



  • RoHS-compliant 2011/65/EU
  • REACh-compliant 2006/121/EU
Delivery forms

Dolphon®XL-2112 is available in 25 kg disposable containers, 230 kg barrels and 1,200 kg containers.


Dolphon®XL-2112 can be stored for 12 months at room temperature in a sealed container (max. 30 °C). The impregnating resin must be stored in a cool place and protected against direct sunlight, UV radiation and sources of heat.


The curing time commences once the object temperature has been reached.

Typical curing times:

  • 1 h - at 150 °C*
  • 3-4 h - at 130 °C*

*Full curing is measured by DSC. Time must be taken after units reach the baking temperature. For objects having to endure high mechanical or chemical stress during service, longer curing times are recommended.


Dolphon®XL-2112 can be processed in dipping plants and vaccum chambers.

Dolphon®XL-2112 is sensitive to UV-rays. When not in use, the impregnation tanks must be protected from the light by means of a (non-transparent) lid.

Suggested impregnating process:

- Preheat the units at 50-60 °C (max.)
- Dip into the resin for 30-60 min.
- Drain for 1 h min.
- Bake 1 h at 150 °C or 3-4h at 130 °C* (see curing)

For the VPI application the cycle must be set for each type of machines. Feel free to contact us.

Technical data
Gel time  Weight loss  Bond strength  Bond strength  Bond strength 
Unit of measure Conditions  Values  Test method 
min  at 100 °C 30-50  
10 g backed 1 h at 150 °C <3.5  
25 °C ˃130  
80 °C ˃82 IEC 61033 Helical Coil
155 °C ˃45 IEC 61033 Helical Coil
Heat conductivity  Thermal class  Thermal class 
Unit of measure Values  Test method 
W/mK  0.25-0.30  
°C  200 MW 35-C /UL 1446
°C  220 MW16-C / UL 1446
Reaction with copper  Reaction with copper alloys  Reaction with natural rubber  Resistance  Resistance  Resistance  Resistance  Water absorption  Water absorption 
Unit of measure Conditions  Value  Test method 
  Xylene, Methanol, Hexane resistent IEC 60464-2
transformer oil <0.5 ISO 175 - 7 days
30 % sulfuric acid <1.5 ISO 175 - 7 days
10 % hydrochloric acid <2.5 ISO 175 - 7 days
24h at 23 °C <1 ASTM D 570
90 min. at 100 °C <1.5 ASTM D 570
Liquid phase
Specific density  Viscosity 
Unit of measure Conditions  Values  Test method 
g/l  at 25 °C 1150±30  
cps  25 °C 1700-2000 Brookfield
Dielectric strength  Dielectric constant  Volume resistivity  Volume resistivity 
Unit of measure Conditions  Values  Test method 
kV/mm  0.025 mm film 124 ASTM D-115. RT
  at 25 °C 3.2 ASTM D-150
Ω x cm    ˃10^15 IEC 60464-2
Ω x cm  after 7 d water immersion ˃10^12 IEC 60464-2

Dolphon®, SYNTHITE® are registered trademarks of John C. Dolph Company (Dolphs).