SikaBiresin® CR144 CH135-4
Composite resin system for RTM process with Tg up to 153 °C
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SikaBiresin® CR144 CH135-4 is an epoxy resin system suitable for the production of high performance FRP components using the RTM process.
- Good injection and wetting behaviour at elevated injection temperatures
- Suited for fast cycle times
- High temperature resistance
Overview
PRODUCT BENEFITS
- Good injection and wetting behaviour at elevated injection temperatures
- Suited for fast cycle times
- High temperature resistance
Areas of Application
SikaBiresin® CR144 CH135-4 is especially suited for injection processes due to its viscosity and reacitivity. It can be used in areas where both higher temperature resistance and short cycle times are required.This product is suitable for experienced professional users only.
Tests under actual processing conditions and with additional materials such as fibers and release agents must be performed to proof material compatibility.
Packaging
SikaBiresin® CR144 (A)
| Pail | 10 kg |
| Drum | 200 kg |
| IBC | 1000 kg |
SikaBiresin® CH135-4 (B)
| Can | 3 kg |
| Drum | 180 kg |
| IBC | 850 kg |
Product Details
| Properties |
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| Chemical base |
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| Color |
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| Density |
cured |
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| Mixing ratio | by weight by volume | 100 : 24 100 : 30 | |||
| Viscosity (CQP029-4) |
mixed (25 °C) |
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| Application temperature | see section "APPLICATION" | ||||
| Pot life (CQP021-3 / Gel Timer TECAM) | 140 minutes | ||||
| Curing conditions | 4 hours | 140 °C | |||
| Tensile strength (CQP036-2 / ISO 527) | 91 MPa | ||||
| Tensile modulus (CQP036-2 / ISO 527) | 2750 MPa | ||||
| Tensile elongation (CQP036-2 / ISO 527) | 6.0 % | ||||
| Flexural strength (CQP027-2 / ISO 178) | 135 MPa | ||||
| Flexural modulus (CQP027-2 / ISO 178) | 2850 MPa | ||||
| Compressive strength (CQP028-5 / ISO 604) | 123 MPa | ||||
| Shore D hardness (CQP023-1 / ISO 868) | 86 | ||||
| Impact resistance (CQP038-2 / ISO 179) | 24 kJ/m² | ||||
| Glass transition temperature (CQP301-5 / ISO 11357) | 153 °C | ||||
| Heat deflection temperature (CQP030-1 / ISO 75B) | 153 °C | ||||
| Shelf life |
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| CQP = Corporate Quality Procedure |
Application
Application
The resin system is optimized for injection temperatures between 45 °C – 80 °C. Consider the change in processing parameters if the resin system is processed at different temperatures. The mould temperature can vary depending on the process, for an isothermal process it can be 60 °C – 140 °C and for a variothermal process 60 °C – 180 °C. Information regarding the viscosity development at different temperatures are given in the diagram below.
Diagram 1: Viscosity development
Prior to application, check both components for crystallization. The crystallization process can be reversed by heating the product to 60 °C – 70 °C until the crystals are no longer visible.
Containers must be closed tightly immediately after each use to prevent moisture ingress.
Removal
Uncured SikaBiresin® CR144 CH135-4 can be removed from tools and equipment with Sika® Reinigungsmittel 5 or another suitable solvent. Once cured, the material can only be removed mechanically. Hands and exposed skin shall be washed immediately using industrial hand cleaner and water.
Do not use solvents on skin.
STORAGE CONDITIONS
All components must be stored between 15 °C – 30 °C.
Prior to use check the material for homogeneity and crystallization and make sure to temper it to processing temperature.