SikaBiresin® CR144 CH135-4

Composite resin system for RTM process with Tg up to 153 °C

SikaBiresin® CR144 CH135-4 is an epoxy resin system suitable for the production of high performance FRP components using the RTM process.  

  • Good injection and wetting behaviour at elevated injection temperatures
  • Suited for fast cycle times
  • High temperature resistance
 
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PRODUCT BENEFITS

  • Good injection and wetting behaviour at elevated injection temperatures
  • Suited for fast cycle times
  • High temperature resistance
 

Areas of Application

SikaBiresin® CR144 CH135-4 is especially suited for injection processes due to its viscosity and reacitivity. It can be used in areas where both higher temperature resistance and short cycle times are required.
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® CR144 (A)

Pail

10 kg

Drum200 kg
IBC1000 kg

SikaBiresin® CH135-4 (B)

Can

3 kg

Drum180 kg
IBC850 kg

 

Product Details

Typical Product Data
Properties

Component A

SikaBiresin® CR144

Component B

SikaBiresin® CH135-4

Chemical base

Epoxy resin

Amine hardener

Color

Translucent

Colorless to yellowish

Density

  

cured

1.14 kg/l

0.92 kg/l

1.14 kg/l

Mixing ratio

by weight

by volume

100 : 24

100 : 30

Viscosity (CQP029-4)

     

mixed (25 °C)
mixed (55 °C)
mixed (80 °C)

12 000 mPa·s

10 mPa·s

2000 mPa ·s
200 mPa·s
80 mPa·s

Application temperature

see section "APPLICATION"

Pot life (CQP021-3 / Gel Timer TECAM)

140 minutes

Curing conditions

 4 hours

140 °C

Tensile strength (CQP036-2 / ISO 527)

91 MPa

Tensile modulus (CQP036-2 / ISO 527)

2750 MPa

Tensile elongation (CQP036-2 / ISO 527)

6.0 %

Flexural strength (CQP027-2 / ISO 178)

135 MPa

Flexural modulus (CQP027-2 / ISO 178)

2850 MPa

Compressive strength (CQP028-5 / ISO 604)

123 MPa

Shore D hardness (CQP023-1 / ISO 868)

86

Impact resistance (CQP038-2 / ISO 179)

24 kJ/m²

Glass transition temperature (CQP301-5 / ISO 11357)

153 °C

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

153 °C

Shelf life

24 months

12 months

CQP = Corporate Quality Procedure

Application

Application Information

Application

The resin system is optimized for injection temperatures between 45 °C – 80 °C. Consider the change in processing parameters if the resin system is processed at different temperatures. The mould temperature can vary depending on the process, for an isothermal process it can be 60 °C – 140 °C and for a variothermal process 60 °C – 180 °C. Information regarding the viscosity development at different temperatures are given in the diagram below.

  

01-diagram-SikaBiresin-CR144_Viscosity

Diagram 1: Viscosity development

  

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® CR144 CH135-4 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.