Bectron® PU 4516 is a strong polyurethane with low shrinkage, with excellent insulation properties and provides good mechanical and chemical protection. It has excellent adhesion and superior thermal resis- tance. It is a low viscosity system for ease of potting.
FEATURES
- Higher temperature resistance 130°C
- Good Adhesion
- Good dielectric properties
- Room temperature curing
- Heat curing
- Low shrinkage
- ROHS compliant
APPLICATIONS
The processing time is about 40 min- utes. Within this time, viscosity will increase; the pre- pared volume for batch production should be just enough to permit processing in this time. If the Bec- tron® PU 4516 system is produced in metering equip- ment, it is possible to shorten the setting time with accelerators.
Properties of materials as supplied
Property | PU 4516 | PH 4912 | Units |
Colour |
Black | Brown trans- parent |
|
Viscosity 25°C DIN 53019 | 450 ± 100 | 110 ± 30 | mPa.s |
Spec. gravity 20°C DIN EN ISO 2811-1 | 1.03 ± 0.05 | 1.23 ± 0.05 | g/cm3 |
Shelf Life | 6 | 6 | months |
Properties of mixture
Property
Mix Ratio: PU 4516 : PH 4912 |
2.0 2.4 |
1 1 |
Parts by weight Parts by volume @20°C |
Viscosity DIN 53019 | 25°C | 310 ± 90 | mPa.s |
Process time (200g mixture) | 25°C | 26 | Min |
Mechanical properties of cured compound
Property | Condition | Value | Units |
Specific Gravity DIN 16945 | 20°C | 1.09 ± 0.02 | g/cm3 |
Hardness ISO 868 |
| 70 ± 10 | Shore D |
Impact resistance DIN 53453 |
| 14 | N/mm.mm2 |