Biresin® CR201

1 of 54 products in this brand
Biresin® CR201 is a three component, anhydride cured, low viscosity epoxy resin system suitable for the production of high performance fi bre reinforced composites with outstanding heat resistance.

Polymer Name: Epoxy Resins & Compounds

Chemical Family: Epoxy & Epoxy Derivatives

Processing Methods: Compression Molding, Filament Winding, Pultrusion

End Uses: Tanks

Technical Data Sheet

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Identification & Functionality

Composite Materials Functions

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

Composites End Use
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
ValueUnitsTest Method / Conditions
Tensile Strength50MPaISO 527
Tensile E-Modulus2850MPaISO 527
Elongation at Break1.9%ISO 527
Flexural Strength115MPaISO 178
Flexural E-Modulus3150MPaISO 178
Compressive Strength150MPaISO 604
Density1.2g/cm³ISO 1183
Impact Resistance8kJ/m²ISO 179
Hardness88Shore DISO 868
Typical Properties
ValueUnitsTest Method / Conditions
Mixing Ratio, parts by Weight100
Mixing Ratio, parts by Volume100
Density at 25°C1.17g/ml
Viscosity at 25°C205mPa.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.