SikaBiresin® L80

Laminating resin for multi-purpose applications

SikaBiresin® L80 is a laminating resin for multi-purpose applications, e.g. manufacturing of laminates, backfilling of molds and models etc.
The Product is available with three hardeners, providing different processing times to meet various application requirements.  

  • Multi-purpose applications
  • Good soaking and wetting properties
  • High glass fiber addition possible
  • For true-to-size laminates with glass or carbon fibers
 
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Overview

PRODUCT BENEFITS

  • Multi-purpose applications
  • Good soaking and wetting properties
  • High glass fiber addition possible
  • For true-to-size laminates with glass or carbon fibers
 

Areas of Application

SikaBiresin® L80 is designed for manufacturing of laminates with maximum thickness of 10 mm.  It is suitable for backfilling of molds, models and negatives as well as for manufacturing of laminated foundry patterns. The Product is also used for manufacturing of glass fiber laminates for duplicates of master models, for marking and copy models as well as for production of glass fiber laminates for gauges for different applications. This product is suitable for experienced professional users only.  

Packaging

  

SikaBiresin® L80 (A)

Pail

10 kg

Hobbock60 kg

SikaBiresin® CH80-1 (B)

Canister

3 kg

Hobbock25 kg

SikaBiresin® CH80-2 (B)

Canister

3 kg

Hobbock25 kg

SikaBiresin® GC12 (B)

Box with bottles

9 x 0.4 kg

Canister

2.5 kg

15 kg

 

Product Details

Properties

SikaBiresin® L80 (A)

SikaBiresin®

CH80-1 (B)

SikaBiresin®

CH80-2 (B)

SikaBiresin®

GC12 (B)

Chemical base

Epoxy resin

Amine

Amine

Amine

Color

White

Yellowish-transparent

Yellowish-transparent

Amber

 

Mixing ratio

by weight

100

15

15

12

Density

 

cured

1.38 kg/l

 

1.01 kg/l

1.37 kg/l

1.01 kg/l

1.37 kg/l

1.0 kg/l

1.35 kg/l

Viscosity (CQP538-2 / BROOKFIELD LVT)

 

mixed

3350 mPa·s

 

170 mPa·s

2200 mPa·s

85 mPa·s

1600 mPa·s

180 mPa·s

2000 mPa·s

Pot life (CQP021-3 / Gel Timer TECAM)

500 g at 23 °C

45 minutes

75 minutes

60 minutes

Demolding time

depending on design / thickness

16 – 24 hours

Shore D hardness (CQP023-1 / ISO 868)

86 A

87 B

85 A

86 B

85 A

88 B

Flexural strength (ISO 178)

85 MPa A

100 MPa B

90 MPa A

100 MPa B

75 MPa A

80 MPa B

Flexural modulus (CQP027-2 / ISO 178)

4450 MPa A

4500 MPa B

4400 MPa A

4450 MPa B

4000 MPa A

3950 MPa B

Tensile strength (CQP036-1 / ISO 527)

50 MPa A

60 MPa B

60 MPa A, B

55 MPa A

60 MPa B

Impact resistance (CQP038-2 / ISO 179)

12 kJ/m2 A, B

12 kJ/m2 A

15 kJ/m2 B

11 kJ/m2 A

14 kJ/m2 B

Compressive strength (CQP028-5 / ISO 604)

110 MPa A

115 MPa B

110 MPa A

115 MPa B

115 MPa A, B

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

52 °C A

70 °C B

52 °C A

70 °C B

54 °C A

80 °C B

Shelf life

18 months

12 months

12 months

12 months

CQP = Corporate Quality Procedure

A) curing condition: 23 °C for 14 days

B) post curing: 80 °C for 2 hours

Application

Surface preparation

The material and processing temperature shall be between 18 °C and 25 °C.
Make sure the mold or master model is clean, dry, dust and grease free.
If mold or master-model surface is porous, it must be properly sealed prior applying the release agent.
Wax-based release agents are recommended. For further information regarding Sika release agent consult the corresponding Product Data Sheet.

Application

The fabric must be suitable for the use of epoxy resins.
For laminates glass fibres with binding twill are better than binding cloth because of its better suppleness.
SikaBiresin® L80 is applied to the selected fiber fabric (e.g. glass fiber mats) using a brush or hand roller.

 

The reinforcing fibers are laid in layers "wet on wet". The fibers must be impregnated with the resin without air entrapments. Entrapped air is expelled from the inside to the outside.
If the surface needs to be further laminated or bonded, it is recommended to use a peel ply.
Ensure enough and adequate laminate to obtain the required form strength and to avoid deformation during demolding.
Further post curing of the demolded part can improve the final mechanical properties.
Depending on the geometry and weight of the part, it is recommended to use a conformer while post curing.

STORAGE CONDITIONS

Both components must be stored at temperature between 15 °C and 25 °C in original unopened containers.

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