Product Description
The 305 kit from Entropy Resins is designed for rapid compression moulding, optimising heat-based processes for fibre-reinforced composites. This epoxy offers excellent fibre impregnation and thixotropic characteristics to limit sagging in high-temperature polymerisation applications. Thanks to its high modulus, the 305 resin is highly flexible, enabling the production of durable, lightweight composite parts. The 305 resin is biosourced and certified BioPreferred by the USDA with a biobase content of 28%.
Hardeners Available for the Kit
The kit can be combined with one of two hardeners, depending on your needs:
- CPS (Slow) hardener: Working time: 50 minutes at 25°C and offers complete polymerisation in 20 minutes at 82°C. Ideal for applications where flexibility is required.
- CPF (Fast) hardener: 20-minute working time at 25°C and complete polymerisation in 15 minutes at 82°C. Perfect for projects requiring fast cycles.
Areas of Application
- Snowboards
- Skateboards
- Skis
- Press moulding composites
Key Benefits
- Environmentally-friendly: Developed with Super Sap technology from renewable raw materials derived from co-products or waste from other industrial processes, Entropy Resins' 305 epoxy resin contains 28% biobased components, and is certified by the USDA Certified BioBased Product label.
- Low viscosity: Allows excellent impregnation of fibres and limits sagging. Ensures even application.
- Thermal and mechanical resistance: Guarantees stability at high temperatures and withstands mechanical stress.
Technical Data Hardener
Mixing Ratio
| By volume | By weight |
| Mixing Ratio | 2:1 | 100:40 |
| Mixing Ratio | 2:1 | 100:38 |
Pot Life (at 25°C)
| Hardener | Pot Life |
| Fast CPF | 20 minutes |
| Slow CPS | 50 minutes |
Full Polymerisation Recommended
| Hardener | Full Polymerisation |
| Fast CPF | 15 minutes at 82°C |
| Slow CPS | 20 minutes at 82°C |
Mechanical Strength
| Property | Fast CPF | Slow CPS |
| Tensile | 73.1 MPa | 68.9 MPa |
| Flexural | 109.4 MPa | 102 MPa |
| Compressive | 84.1 MPa | 81.4 MPa |
| Ultimate Tg (Glass transition temperature) | 66 °C | 68 °C |
| Hardness (Shore D) | 70-80 | 70-80 |
Consumption
Approx. 3 litres for 2 snowboards or 2 pairs of skis.
Directions for Use
- Follow the mixing ratio of the two components based on the weights indicated.
- Mix the product for at least 2 minutes, scraping all surfaces of the container to obtain a homogeneous blend.
- Work in a temperature-controlled environment to respect the product's optimum limits. Avoid using the product in environments with cold ambient temperatures or high humidity.
- Make sure surfaces are clean and dry, free from dirt, debris and traces of oil. Pre-sanding is strongly recommended to improve adhesion.
- Carry out preliminary tests with the materials and processes under consideration to understand the curing characteristics of epoxy in your working environment.
Good to Know
During polymerisation, an amine film may appear in sticky, waxy or oily form. This can reduce adhesion and make sanding more difficult. To remove it, use WEST SYSTEM's cleaner.
For further details, please consult the technical data sheets.
