Elastic 2-component polyurethane casting compound with excellent electrical and mechanical properties.Due to its high impact strength and good resistance to water, transformer oil, gasoline and other chemicals it is well suited for the insulation of low voltage components as transformers, coils, electronics switches and others.
The casting compound is UL 94 V-0 recognized as self-extinguishing without any halogen or antimony containing flame retardants. It complies with the RoHS (2002/95/EG) and electronic waste regulations (2002/96/EG WEEE directive of the EU).
Stobicast® L 781.36 has been formulated as flame retardant according to the requirements of the Household Appliances standard IEC 60 335 having GWFI of 960°C (glow wire flammability index IEC 60695-2-12) and GWIT of 850 °C (glow wire ignition temperature IEC 60695-2-13).
Typical Properties
Typical properties at 25°C
Polyol
Polyisocyanate
Mixture
Density [g/cm3]DIN 53217/1+2
1.48
1,22
1,42
Viscosity [mPa·s]
DIN 53019/1
2250
100
700
Mixing ratio by weight
100
16.0
Typical properties of tempered casting resin
(16 hours at 80 °C)
Mechanical Properties
Shore Hardness
70 A
DIN EN ISO 868
Tensile Strength
4 N/mm2
DIN 53455
Elongation at break
130 %
Impact Strength
33 kJ/m2
DIN 53453
Water absorption
(Disc 50x50x4 mm)
36 mg in 24 h
63 mg in 96 h
DIN 53495
Thermomechanical Properties
Linear Thermal Expansion Coefficient
125 10-6 K-1
DIN 53752
Thermal Conductivity
0.7 W K-1m
-1
DIN 52612
Glass Transition Temperature
0°C
DSC
Temperature range of Use
(for typical Application)
