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SikaBiresin® CR910

Fast 2-component epoxy resin system for structural laminate repairs

SikaBiresin® CR910 is a high Tg composite resin system for wet lay-up processing.
It is used where fast curing products for repair of wind blades are requested. Depending on required potlife the slow or fast hardener has to be used.  

  • Good impregnation and non-draining
    properties
  • High glass transition temperature
  • Fast curing
  • High stiffness and strength
  • Direct curing without waiting gel-time
  • Usable for hand lay-up in production and field repair
  • Resistant to crystallization at low
    temperature
  • Light weight packaging (MixPax)
 
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PRODUCT BENEFITS

  • Good impregnation and non-draining
    properties
  • High glass transition temperature
  • Fast curing
  • High stiffness and strength
  • Direct curing without waiting gel-time
  • Usable for hand lay-up in production and field repair
  • Resistant to crystallization at low
    temperature
  • Light weight packaging (MixPax)
 

Areas of Application

SikaBiresin® CR910 is designed for repair of damaged laminate structures of rotor blades. It is optimized for hand lay-up but can also be used for repair of patches by vacuum infusion.
This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed ensuring adhesion and material compatibility.  

Packaging

  

SikaBiresin® CR910 (A)

Pail

10 kg

SikaBiresin® CH910-1 (B)

Can

2.0 kg

SikaBiresin® CH910-5 (B)

Can

4.0 kg

SikaBiresin® CR910 (A+B)

MixPax 300 g

Cartridge

940 ml

 

Product Details

Typical Product Data
Properties

SikaBiresin® CR910

SikaBiresin® CH910-1 (B)

SikaBiresin® CH910-5 (B)

Chemical base

Epoxy

Amine

Amine

Color

 

mixed

translucent

amber

amber

Colorless to amber

Density

  

cured

1.17 g/cm3 A

0.98 g/cm3 A

0.94 g/cm3 A

1.18 g/cm3 A

1.17 g/cm³ A

Mixing ratio

by weight

100 : 20

100 : 20

Viscosity (CQP029-4)

  

mixed

2300 mPa·s A, C

50 mPa·s B, C

800 mPa·s  B, C

12 mPa·s B, C

580 mPa·s B, C

Application temperature

5 ─ 35 °C

5 ─ 35 °C

Pot-life (CQP536-3)

45 minutes

160 minutes

Curing conditions

2 hours

80 °C

80 °C

Tensile strength (CQP036-2 / ISO 527)

80 MPa A, D

85 MPa A, D

Tensile modulus (CQP036-2 / ISO 527)

3200 MPa A, D

3300 MPa A, D

Tensile elongation (CQP036-2 / ISO 527)

5 % A, D

5 % A, D

Flexural strength (CQP027-2 / ISO 178)

130 MPa A, D

130 MPa A, D

Flexural modulus (CQP027-2 / ISO 178)

3400 MPa A, D

3400 MPa A, D

Compressive strength (CQP028-5 / ISO 604)

110 MPa A, D

115 MPa A, D

Shore D hardness (CQP023-1 / ISO 868)

85 A, D

85 A, D

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

95 °C D

95 °C D

Shelf life

24 months

24 months

24 months

CQP = Corporate Quality Procedure

A) 23 °C / 50 % r.h.B) 25 °C / 50 % r.h.
C) rotation, PP40, 0.5 mm, 150 min-1D) cured for 2 hours at 80 °C
stored (unopened) in a dry place at 15 ─ 25 °stored (unopened) in a dry place at 15 ─ 25 °C
Technical Information

CURE MECHANISM

The curing of SikaBiresin® CR910 takes place by chemical reaction of the two components. Higher temperatures speed up the curing process and lower slow it down.

CHEMICAL RESISTANCE

In case of chemical or thermal exposure conduct project related testing.

Application

Application Information

Surface preparation

It is necessary to prepare the substrates prior to lamination to ensure optimal adhesion and strength. Surfaces must be clean, dry and free from grease, oil, dust and contaminants. After the cleaning process, a physical or chemical pretreatment might be required, depending on the surface and type of material.

Application

For information concerning application consult the Application Manual SikaBiresin® CR910 Blade Repair.

 

Removal

Uncured SikaBiresin® CR910 may be removed from tools and equipment with Sika® Cleaner P. Once cured, the material can only be removed mechanically.

Hands and exposed skin have to be washed immediately using hand wipes such as Sika® Cleaner-350H or a suitable industrial hand cleaner and water.

Do not use solvents on skin.

STORAGE CONDITIONS

All components must be stored between 15 °C and 30 °C in a dry place.

Prior to use check the material for homogeneity and crystallization and make sure to temper it to processing temperature. If crystallization of resin occurs, heat the MixPax to 60 °C until crystallization has disappeared (maximum 2 hours).

During transportation, a short term temperature of 60 °C must not be exceeded. Do not expose to direct sunlight.

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