Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
- Product Families
Features & Benefits
- Product Highlights
- Excellent impregnation and good non draining properties due to optimized mixed viscosity
- Biresin® CR122 (A) with hardeners (B) Biresin® CH122-3 and CH122-5 are Germanischer Lloyd approved, certifi cate no. WP 1620018 HH (see attached)
- Glass transition temperatures of up to 120°C are achievable depending on curing conditions
- Biresin® CR122 (A) with hardeners (B) Biresin® CH122-3, CH122-5 and CH122-9 are approved by
- Luftfahrt-Bundesamt (German Aeronautics Federal Offi ce) as resin system for GRP, CRP and ARP parts for gliders and power gliders (see attached)
- 3 hardeners with a uniform mixing ratio of 100:30 gives a range of processing times and processing fl exibility. The reactivity can be adapted by mixing the hardeners
- Demoulding is possible after RT curing when using the three fastest curing agents Biresin® CH122-1, CH122-3 (B) and CH122-5 (B)
- Hardener (B) Biresin® CH122-9 allows for a very long potlife but is only available in blue
Applications & Uses
- Markets
- Composites End Use
- Composites Processing Methods
- Application
Biresin® CR122 systems are well suited to the hand lay-up process due to the optimized viscosity range for those processes. They can be used in the production of general industrial composites as well as in the production of composite tooling by hand lay-up and where temperature performance of up to 120°C is needed.
- Processing
- The material and processing temperatures should be from 18 to 35°C.
- The mixing ratio must be followed accurately to obtain best results. Deviating from the correct mix ratio will lead to lower performance.
- The fi nal mechanical and thermal values are dependent on the applied postcuring cycles.
- Parts produced with Biresin® CH122-1, CH122-3 and CH122-5 hardeners (B) can be demoulded after cure at room temperature
- Postcuring is recommended.
- To clean brushes or tools immediately Sika Reinigungsmittel 5 is recommended.
- Additional informations are available in “Processing Instructions for Composite Resins”.
Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Mixing Ratio, parts by Weight | 100 | — | — |
| Mixing Ratio, parts by Volume | 100 | — | — |
| Density at 25°C | 1.17 | g/ml | — |
| Viscosity at 25°C | ~850 | 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® CR122 resin (A) is 24 month and of Biresin® CH122-1, CH122-3, CH122-5 and CH122-9 hardeners (B) 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 to a minimum of 60°C.
- Hardener (B) Biresin® CH122-9 may also crystallize. This crystallization is easily removed by warming up for a suffi cient time to 40°C.
- Containers must be closed tightly immediately after use. The residual material needs to be used up as soon as possible.