Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
- Product Families
Features & Benefits
- Materials Features
- Product Highlights
- The reactivity of the system can be adjusted by modifying the level of the accelerator (C) Biresin® CA144
- Fast infi ltration of dry fi bres due to good wetting characteristics, low mixed viscosity and an elevated processing temperature
- An excellent combination of high Tg (150°C) and elongation to break (>5%)
- Approved by Germanischer Lloyd f- Certifi cate No. WP 1520029 HH (attached)
Applications & Uses
- Markets
- Applications
- Composites End Use
- Composites Processing Methods
- Application
Biresin® CR144 system is particularly suited to the fi lament winding and pultrusion processes due to its low viscosity, good fi bre wetting capabilities and very long potlife.
- Processing
- The material and processing temperatures should be in the range 18 - 35°C.
- The mixing ratio must be followed accurately to obtain best results. Deviating from the correct mix ratio will lead to lower performance.
- Before demoulding precuring of at least 2 h at 90°C is recommended.
- The final mechanical and thermal values are dependent on the applied postcuring cycles.
- It is recommended to clean brushes or tools immediately after use with Sika Reinigungsmittel 5.
- Additional information is available in “Processing Instructions for Composite Resins”.
Properties
- Mechanical Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Tensile Strength | 90 | MPa | ISO 527 |
| Tensile E-Modulus | 2.75 | MPa | ISO 527 |
| Elongation at Break | 5.4 | % | ISO 527 |
| Flexural Strength | 140 | MPa | ISO 178 |
| Flexural E-Modulus | 3000 | MPa | ISO 178 |
| Compressive Strength | 120 | MPa | ISO 604 |
| Density | 1.21 | g/cm³ | ISO 1183 |
| Impact Resistance | 20 | kJ/m² | ISO 179 |
| Hardness | 87 | Shore D | ISO 868 |
| Value | Units | Test Method / Conditions | |
| Mixing Ratio, parts by Weight | 100 | — | — |
| Mixing Ratio, parts by Volume | 100 | — | — |
| Density at 25°C | 1.16 | g/ml | — |
| Viscosity at 25°C | ~10,500 | mPa.s | — |
Technical Details & Test Data
- Postcuring
The suitable cure cycle and the attainable mechanical and thermal values depend on various factors, such as laminate thickness, fi bre volume, reactivity of the resin system etc.
An appropriate cure cycle could look as follows:- Heat-up rate of ca. 0.2°C/Minute until approx. 10°C below the required glass transition temperature (Tg)
- Followed by a dwell at that temperature of between 2 and 12 hours.
- Part(s) should then be cooled at ~0.5°C per minute
The specifi c postcure should be adapted to the required technical and economic requirements. To measure the mechanical performance of the resin system a SikaAxson standard cycle is used to ensure that the full Tg potential of the system in question is reached.
Packaging & Availability
- Packaging
1000 net weight, 10 kg
Storage & Handling
- Storage
- Minimum shelf life of Biresin® CR144 resin (A) is 24 month and of Biresin® CH141 hardener (B) and CA144 accelerator (C) is 12 month under room conditions (18 - 25°C), when stored in original unopened containers.
- After prolonged storage at low temperature, crystallization of resin (A) may occur. This is easily removed by warming up for a suffi cient time at a minimum of 60-80°C.
- Containers must be closed tightly immediately after use. The residual material needs to be used up as soon as possible.