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
Download datasheet


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 180 °C (H)
  • UL-approved with magnet wire
  • temperature class acc. UL 1446:
magnet wire Twisted pairs
MW 16-C 220 °C
MW 35-C 200 °C




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 18 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 (minimum):

  • 1 h - at 150 °C*
  • 3-4 h - at 130 °C*
  • 5-7 h - at 120 °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 at:* (see curing)

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

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Technical data

Property Unit of measure Conditions Values Test method
Gel time min at 100 °C 30-50
Weight loss % 10 g backed 1 h at 150 °C <3.5
Bond strength N 25 °C ˃130 IEC 61033 Helical Coil
Bond strength N 80 °C ˃82 IEC 61033 Helical Coil
Bond strength N 155 °C ˃45 IEC 61033 Helical Coil
Property Unit of measure Values Test method
Thermal conductivity W/mK 0.25-0.30
Thermal class °C 200 MW 35-C /UL 1446
Thermal class °C 220 MW16-C / UL 1446
Property Unit of measure Conditions Value Test method
Reaction with natural rubber yes
Resistance Xylene, Methanol, Hexane resistent IEC 60464-2
Resistance % transformer oil <0.5 ISO 175 - 7 days
Resistance % 30 % sulfuric acid <1.5 ISO 175 - 7 days
Resistance % 10 % hydrochloric acid <2.5 ISO 175 - 7 days
Water absorption % 90 min. at 100 °C <1.5 ASTM D 570
Water absorption % 24h at 23 °C <1 ASTM D 570
Property Unit of measure Conditions Values Test method
Dielectric strength kV/mm 0.025 mm film / 25 °C >128 ASTM D-115. RT
Dielectric constant at 25 °C / 50 Hz 3.2 ASTM D-150
Volume resistivity Ω x cm 25 °C >10^15 IEC 60464-2
Volume resistivity Ω x m after 7 d water immersion >10^12 IEC 60464-2
Liquid phase
Property Unit of measure Conditions Values Test method
Specific density g/cm³ at 25 °C 1,12-1,18
Viscosity mPas 25 °C 1700-2000 Brookfield
Specific density g/l