Enhanced TDS
Knowde-enriched technical product data sheet
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
- Product Families
Features & Benefits
- Materials Features
- Product Highlights
- Biresin® CR201 has a very high glass transition temperature, ca. 200°C
- 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
Applications & Uses
- Markets
- Applications
- Composites End Use
- Composites Processing Methods
- Application
Biresin® CR201 system is particularly suited to the fi lament winding process 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 fi nal 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
Value Units Test Method / Conditions Tensile Strength 50 MPa ISO 527 Tensile E-Modulus 2850 MPa ISO 527 Elongation at Break 1.9 % ISO 527 Flexural Strength 115 MPa ISO 178 Flexural E-Modulus 3150 MPa ISO 178 Compressive Strength 150 MPa ISO 604 Density 1.2 g/cm³ ISO 1183 Impact Resistance 8 kJ/m² ISO 179 Hardness 88 Shore D ISO 868 - 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 205 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.
Storage & Handling
- Storage
- Minimum shelf life of Biresin® CR201 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.