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SikaBiresin® CR131

(formerly Biresin® CR131)

Composites resin system for vacuum infusion process with Tg up to 136 °C

SikaBiresin® CR131 is an epoxy resin system suitable for the production of high performance fiber reinforcement composites parts and molds with thermal properties up to 136 °C by vacuum infusion process.  

  • Fast wetting of dry fabrics and non-wovens due to very good flow properties
  • Two hardeners (B) enable a variation of processing times
 
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PRODUCT BENEFITS

  • Fast wetting of dry fabrics and non-wovens due to very good flow properties
  • Two hardeners (B) enable a variation of processing times
 

Areas of Application

SikaBiresin® CR131 is especially suited to the infusion process and can be used for the production of composites components and large molds, which require high thermal resistance.  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® CR131 (A)

SikaBiresin®
CH132-5 (B)

SikaBiresin®
CH132-7 (B)

Chemical base

Epoxy resin

Amine hardener

Amine hardener

Color

Translucent

Blue

Blue

Mixing ratio

by weight

by volume

100 : 28 

100 : 35

100 : 32 

100 : 39

Density

liquid

cured

1.16 g/ml

0.93 g/ml 

1.15 g/ml

0.95 g/ml 

1.16 g/ml

Viscosity (CQP029-4)

 

mixed

1800 mPa·s

20 mPa·s 

450 mPa·s

30 mPa·s 

450 mPa·s

Pot life (CQP021-3 / Gel Timer TECAM)

140 minutes

260 minutes

Curing conditions

8 hours

125 °C

125 °C

Tensile strength (CQP036-2 / ISO 527)

86 MPa

84 MPa

Tensile modulus (CQP036-2 / ISO 527)

2700 MPa

2700 MPa

Tensile elongation (CQP036-2 / ISO 527)

5.9 %

6.7 %

Flexural strength (CQP027-2 / ISO 178)

124 MPa

120 MPa

Flexural modulus (CQP027-2 / ISO 178)

2750 MPa

2800 MPa

Compressive strength (CQP028-5 / ISO 604)

116 MPa

110 MPa

Shore D hardness (CQP023-1 / ISO 868)

86

86

Impact resistance (CQP038-2 / ISO 179)

46 kJ/m²

37 kJ/m²

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

136 °C

127 °C

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

135 °C

124 °C

Shelf life

24 months

12 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® CR131 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.

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