MK-EC50/60/70 (Peak/Intermittent temperature)
Key Advantages
Engineered with platinum catalysis and molecular chain reinforcement, this series achieves ultra-low 8-15% compression set under 200℃×70h with ≥90% high-temp resilience. The optimal solution for short-term thermal shock sealing.
Short-Term Compression Resistance
- Compression set: 8-15% @200℃×70h (ASTM D395)
- Resilience: ≥90% @250℃ (ISO 4662)
Thermal Stability
- Tensile retention: >85% @250℃×500h
- Hardness Δ: ≤±3 Shore A (ISO 7619)
Applications
Turbocharger seals / Server CPU socket springs / Industrial sensor gaskets
MK-LC50/60/70; MK-LC50/60/70-1 (Continuous service temperature)
Features and BenefiKey Advantages
Featuring aramid fiber reinforcement and optimized crosslink density, this series maintains 8%~30% compression set at 250℃×1000h, with -1 grade surviving 1500h continuous compression.
Short-Term Compression Resistance
- Compression set: 8-15% @200℃×70h (ASTM D395)
- Resilience: ≥90% @250℃ (ISO 4662)
Thermal Stability
- Tensile retention: >85% @250℃×500h
- Hardness Δ: ≤±3 Shore A (ISO 7619)
Typical Properties:
| Properties Before Aging | |||||
| Property | Unit | Test Method | MK-LC40 | MK-LC50 | MK-LC60 |
| Appearance | – | Visual | Off-white | Off-white | Off-white |
| Hardness | Shore A | GB/T 2411-2008 | 40±5 | 50±5 | 60±5 |
| Plasticity Number | Williams Plastometer | 165 | 205 | 240 | |
| Tensile Strength | MPa | GB/T 6344-2008 | 7.5 | 8 | 8.5 |
| Elongation at Break | % | GB/T 528-1998 | 650 | 500 | 500 |
| Tear Strength | kn/m | GB/T10808-2006 | 20 | 18 | 18 |
| After Post-cure: 200℃(392°F）x4H | |||||
| Compression Set | （175℃/22H,25%compression，Φ29×12.5） | ≤15 | ≤12 | ≤12 | |
| After aging at 250°C/70h (oxygen atmosphere) | |||||
| Hardness | Shore A | GB/T 2411-2008 | 40±5 | 50±5 | 60±5 |
| Tensile Strength | MPa | GB/T 6344-2008 | 4.1 | 4.9 | 5.2 |
| Elongation at Break | % | GB/T 528-1998 | 280 | 220 | 220 |
Notes:
- Linear shrinkage depends on curing conditions, such as: type of curing agent, curing temperature, and dimensions of the molded article.
- Test specimens obtained from 2 mm thick plaques cured with 1.5 phr ( 2,5-di(tert-butylperoxy)-2, 5-dimethylhexane, 50% masterbatch): Molded at 180°C (352°F) for 5 minutes, post-cured at 200°C (392°F) for 4 hours.
- Specification Setters: The above values are not for specification purposes. For detailed requirements, please contact our engineering staff.
- Handling, Safety & Storage: check MSDS
- All product information herein is believed accurate and reliable. However, the Company’s laboratory expressly disclaims all warranties (express or implied) regarding this data. Content may involve third-party intellectual property rights; we assume no liability for related claims. Reproduction or distribution of this document without the Company’s prior written consent is strictly prohibited.