Peróxido
Series 4 – Peroxide-cured silicone with low compression set (CS) and oil resistance
VMQ compound specific for O-rings, damping systems and parts with elastic recovery
40 – 80 Shore A
Hardness
-60 °C / +200 °C
Temperature
Extrusion / Moulding
Processes
Series 4 is a peroxide-cured VMQ silicone formulation, specifically developed for applications requiring excellent elastic recovery after compression (low Compression Set) and good resistance to oil contact.
Especificaciones técnicas
Excellent Compression Set value (CS between 11% and 18% at 150°C)
Good return to initial value after repeated stress (spring effect)
Moderate tear strength (10 to 15 KN/m) prioritizing elastic recovery
Thermal stability in continuous service from -60 °C to +200 °C
Maintenance of elastic properties over a wide temperature range
Specific density between 1.11 and 1.40 g/cm³ depending on hardness
Base colour Beige (translucent to opaque); colouring is recommended
Good chemical resistance to oils
Technical Table
| Reference | Hardness (Shore A) | Tensile (MPa) | Elongation (%) | Tear (kN/m) | Density (g/cm³) |
|---|---|---|---|---|---|
| MQ & EQ440 | 40 | 6 | 350 | 10 | 1.11 |
| MQ & EQ450 | 50 | 7 | 350 | 12 | 1.27 |
| MQ & EQ475 | 75 | 7 | 250 | 15 | 1.4 |
| MQ480 (Moulding only) | 80 | 7.5 | 100 | 15 | 1.4 |
- EQ = formulation for extrusion (available up to 75 ShA)
- MQ = formulation for moulding (available up to 80 ShA)
- Values obtained according to ISO 3302 standards
Test Standards
- Hardness Shore A: NF ISO 7619-1
- Tensile strength and elongation: NF ISO 37
- Tear strength (Type C): NF ISO 34-1
- Density: NF ISO 2781
- Compression Set (CS) 70h/150°C: NF ISO 815
Tolerances
- Standard: ISO 3302
- Extrusion: E1
- Molding: M2
- Cut lengths: L2
Applications
O-rings and sealing washers
Damping systems and silentblocks
Moulded parts or profiles subjected to repeated compression stress
Components requiring good return to initial shape
Applications with oil exposure
Certifications
FDA 21 CFR §177.2600
RoHS compliant
REACH compliant
- Base colour is beige (translucent/opaque); colouring is recommended for aesthetic applications.
- The use of certain dyes or additives could potentially void FDA certification.
- Final certifications must be validated according to the customer specifications.
Request technical feasibility for Series 4