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SynChem – Resins & Varnishes

Damival® 13682/13481 2K- Polyurethane resin

Damival®13682/13481 is a very flexible 2-component resin on base of polyurethane.

Attributes

Damival® 13682/13481 is an alternative for silicone- and epoxy resins for potting and casting as well as coating for electronic assemblies.
Damival® 13682/13481 can be cured at room temperature and has the following properties:

  • Usable and flexible resin, even at low temperatures of -60 °C
  • Free of CRM substances
  • MDI-free hardener
  • Very low water absorption
  • Thermal resistance up to 150 °C
  • High thermal conductivity

The properties depend on the curing stage of object.

Standards

RoHS compliant
ELV 2000/53/CE regulations
REACH compliant acc. obligation (01-01-2014)
Halogen free acc. IEC 61249-2-21 and IPC 4101B
Thermal class B (130 °C)
UL 94-V0

Delivery forms

The resin is available in 25 kg cans and 250 kg drums (one way).
The hardener is available in 5 and 20 kg cans (one way).

Storage

The resin should be stored in cool and dry places. Storage life of resin and hardener at max. 25 °C ambient temperature is 12 months.

Hardening

Curing at room temperature or accelarated at higher temperatures.

Processing

The resin must be stirred prior to use, as it contains fillers which may settle during storage. Avoid air introduction during stirring.

Polyurethane resin and hardner are sensitive to moisture during the processing steps (storage, mixing, casting). The parts to be casted should be dry and clean.  A preheating of the parts and/or of the resin may improve the encapsulation. A vacuum processing enhances the dielectric and mechanical properties.

Mixing can be done by machine or manually. Easy check of the quality mix thanks to the colored hardener. The gel time and the curing time depend on the mixed volume, the temperature and the thickness of the layer. Final properties are depending on the curing level.

Mixing ratio:
100:9 weight-%
100:13 vol.-%

Technical data
Mechanical
Shore-A-hardness  Elongation at break  Water absorption 
Unit of measure Conditions  Values  Test method 
  after 2 months 46 ISO 868
  53 ISO 527
24h, 25 °C 0.3 ISO 62
Thermal
Glass transition temperature  Linear expansion coefficient  Heat conductivity  Resistance against 
Unit of measure Conditions  Values  Test method 
°C    -60 TMA
µm/m/°C    146 TMA
W/mK    0.95 DIN EN-821-2
  thermal shock -60/+150 °C  
Liquid phase
Mixing ratio  Viscosity  Viscosity  Mixture density  Gel time at 25 °C  Topfzeit 
Unit of measure Conditions  Values component A  Values component B  Values Mixture  Test method 
  weight-%     100:9  
mPas  60 °C     1,000 Brookfield ISO 2555
mPas  25 °C 7,000-11,000 500-350 5,000 Brookfield ISO 2555
g/cm³  23 °C 1.63 1.10 1.58  
min  300 g     30-50 TECAM
min  RT ascending to 60 °C     10.5  
Electrical
Dielectric strength  Specific volume resistance at 23 °C  Dielectric constant ε at 50 Hz, 23 °C 
Unit of measure Values  Test method 
kV/mm  20 IEC 60243
Ω*cm  8 x 10^10 IEC 60093
  6 IEC 60250