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SikaBiresin® CR141

(formerly Biresin® 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 potlife
  • Low viscosity
  • Adjustability of reactivity by accelerator (C)
  • DNV GL approved. Certificate No. TAK00001AB
 
SikaBiresin® CR141
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PRODUCT BENEFITS

  • Very long potlife
  • Low viscosity
  • Adjustability of reactivity by accelerator (C)
  • DNV GL approved. Certificate No. TAK00001AB
 

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

Typical Product Data
Properties

SikaBiresin® CR141 (A)

SikaBiresin® CH141 (B)

SikaBiresin® CA141 (C)

Chemical base

Epoxy resin

Anhydride 
hardener

Amine accelerator

Color

Translucent

Colorless

Amber

Mixing ratio

by weight

by volume

100

100

90

87

2

2.4

Density

liquid

cured

1.16 g/ml

1.20 g/ml

1.20 g/ml

0.98 g/ml

 

Viscosity (CQP029-4)

 

mixed

8250 mPa·s

600 mPa·s

40 mPa·s

  

200 mPa·s

  

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 by DSC (CQP301-5 / ISO 11357)

139 °C

Heat deflection temperature (CQP030-1 / ISO 75B)

137 °C

Shelf life

24 months

12 months

12 months

CQP = Corporate Quality Procedure

Application

Application Information

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.
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.