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SikaBiresin® CR84

(formerly Biresin® CR84)

Composite resin system for filament winding process with Tg up to 94 °C

SikaBiresin® CR84 is a lightly thixotropic epoxy resin system with a long pot life. It is formulated for the production of high performance fiber reinforced composite parts with thermal properties up to 94 °C by filament winding process.  

  • Long potlife enables winding of large structures
  • Reduced dripping or spraying from impregnated fibers
  • DNV GL approved. Certificate No. TAK00001AA
 
SikaBiresin® CR84
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PRODUCT BENEFITS

  • Long potlife enables winding of large structures
  • Reduced dripping or spraying from impregnated fibers
  • DNV GL approved. Certificate No. TAK00001AA
 

Areas of Application

SikaBiresin® CR84 with hardener CH84-20 (B) is especially suited to the filament winding process. It can also be used in hand lay-up process where long potlife and minimal resin drainage from the fibers is needed. Furthermore the resin system is particularly suited, if curing temperatures > 75 °C can not be realized. 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® CR84 (A)

Pail10 kg
Drum200 kg
IBC1000 kg

SikaBiresin® CH84-20 (B)

Can

3 kg

Drum180 kg

 

Product Details

Typical Product Data
Properties

SikaBiresin® CR84 (A)

SikaBiresin® CH84-20 (B)

Chemical base

Epoxy resin

Amine hardener

Color

Translucent

Colorless to yellowish

Mixing ratio

by weight

by volume

100 : 30

100 : 37

Density

liquid

cured

1.15 g/ml

0.94 g/ml

1.15 g/ml

Viscosity (CQP029-4)

 

mixed

4450 mPa·s

10 mPa·s

575 mPa·s

Pot life (CQP021-3 / Gel Timer TECAM)

10 hours

Curing conditions

8 hours

80 °C

Tensile strength (CQP036-2 / ISO 527)

89 MPa

Tensile modulus (CQP036-2 / ISO 527)

3550 MPa

Tensile elongation (CQP036-2 / ISO 527)

5.7 %

Flexural strength (CQP027-2 / ISO 178)

124 MPa

Flexural modulus (CQP027-2 / ISO 178)

3250 MPa

Compressive strength (CQP028-5 / ISO 604)

104 MPa

Shore D hardness (CQP023-1 / ISO 868)

85

Impact resistance (CQP038-2 / ISO 179)

76 kJ/m2 

Glass transition temperature by DSC (CQP301-5 / ISO 11357)

94 °C

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

86 °C

Shelf life

24 months

12 months

CQP = Corporate Quality Procedure

Application

Application Information

Application

The resin system is optimized for processing temperatures between 18 °C – 25 °C. Consider the change in processing parameters if the resin system is processed at different temperatures. The curing must be performed at temperature ≥ 18 °C.
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® CR84 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.