SikaBiresin® CR141
Composite resin system for advanced processes with Tg up to 139 °C
SikaBiresin® CR141 is an accelerated anhydride cured epoxy resin system with thermal properties up to 139 °C. It is especially suited for heated processes, which require a very long pot life.
- Very long pot life
- Low viscosity
- Adjustability of reactivity by accelerator (C)
Overview
PRODUCT BENEFITS
- Very long pot life
- Low viscosity
- Adjustability of reactivity by accelerator (C)
Areas of Application
SikaBiresin® CR141 is particularly suited to the filament winding and pultrusion processes due to its low viscosity, good fibre wetting capabilities and very long pot life. 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.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 |
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| Viscosity (CQP029-4) |
mixed |
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| Pot life (CQP021-3 / Gel Timer TECAM) | 24 hours | ||||
| Curing conditions | 3 h at 80 °C + 3 h at 120 °C + 3 h at 140 °C | ||||
| Tensile strength (CQP036-2 / ISO 527) | 78 MPa | ||||
| Tensile modulus (CQP036-2 / ISO 527) | 3200 MPa | ||||
| Tensile elongation (CQP036-2 / ISO 527) | 3.3 % | ||||
| Flexural strength (CQP027-2 / ISO 178) | 145 MPa | ||||
| Flexural modulus (CQP027-2 / ISO 178) | 3100 MPa | ||||
| Compressive strength (CQP028-5 / ISO 604) | 122 MPa | ||||
| Shore D hardness (CQP023-1 / ISO 868) | 87 | ||||
| Impact resistance (CQP038-2 / ISO 179) | 18 kJ/m2 | ||||
| Glass transition temperature (CQP301-5 / ISO 11357) | 139 °C | ||||
| Heat deflection temperature (CQP030-1 / ISO 75B) | 137 °C | ||||
| Shelf life |
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| CQP = Corporate Quality Procedure |
Application
Application
The data for viscosity and potlife in this Product Data Sheet is produced at 25 °C. Consider the change in processing parameters if the resin system is processed at different temperatures. The curing must be performed at temperatures ≥ 80 °C for the material to solidify. Subsequent postcuring is recommended.
Information regarding viscosity development and reaction time depending on the amount of accelerator are shown in the diagrams below.
Diagram 1: Viscosity development at 80 °C depending on accelerator concentration
Diagram 2: Reaction time at 80 °C depending on accelerator concentration, Gelnorm (CQP021-5 / ISO 9396)
Prior to application, check all 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® CR141 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.