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Home > Product > Thermal Conductivity > Potting Material > Bepu 6127
BePu 6127 solvent-free two-component polyurethane encapsulant
- Low viscosity, fast curing in several minutes
- Excellent performance on low-temperature and aging
- Excellent and stably electrical dielectric
- Very low Waterabsorption
- Good adhere to most metals and plastics
FEATURES
The BEPU 6127 A/B is a solvent-free, two-component casting resin polyurethane encapsulantion, based on Polyurethane. The resin (A) consists of organic compounds with hydroxyl-groups whereas the hardener (B) is based on isocyanates. By mixing both components in a ratio by weight of 85:15 a flexible casting resin is achieved via chemical reaction. The product exhibits no measurable change in volume after curing.
Properties after cured
| Item | Unit | Method | (1#) | (2#) | (3#) |
| Hardness | Shore-D | GB/T 531-2008 | 30 | 58 | 30 |
| Dielectric strength | 25℃，kV/mm | GB/T 1695-2005 | 12 | 9 | 17.4 |
| Thermal conductivity | W/m.K | GB/T10297-1998 | 0.55±0.05 | 0.59 | |
| Volume resistivity | 25℃，Ω·cm | GB/T 1692-92 | 2.1*1015 | 1.13*1015 | |
| Dielectric constant | 50Hz，25℃ | GB/T 1693-2007 | 2.383 | 3.3 | |
| Elongation | % | GB/T 528-2009 | 99% | 65% | |
| Tensile strength | 25℃,Mpa | GB/T 528-2009 | 2.7 | 6.2 | 2.2 |
| Shear strength | 25℃,Mpa | GB/T 7124-2008 | Fe: 6Mpa Al 7.2Mpa | Fe: 9.8Mpa Al 11.3Mpa | Fe: 4.6Mpa |
| Glass transition temperature | ℃ | DSC | -3.54 | 9.15 | |
| Loss factor | 25℃@1MHz | GB/T 1693-2007 | 0.0005 | 0.008 | |
It is specifically formulated for automotive sensors, switches, transformers and other electrical devises requiring environments protection.
USE
Process with dispenser
preparations
material preparation
Strilling in the original drum, then pouring into dispenser.
To avoid bubbles inside of finished products, both tank should be usually kept 40 to 60 minutes under the vacuum pressure 0-2mmHg.
Max tolerance
Mixing proportion of deviation may affect mechanical properties, tolerance should be less than 1%.
other
Through the production, should always maintain the tank airtight. the compressed gas should be dry If need, otherwise part B will become sticky, and influence the mechanical properties.
Suggestion of molding condition
Machine low pressure Pouring machine
Mixer static mixer
Material temperature
Part A 25-30 ℃
Part B 25-30 ℃
Demoulding time 15-20mins
Process with Manual is not recommended.
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