SikaBiresin® RG57 FR

Low pressure RIM system for flame retardant parts – simulation of ABS

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SikaBiresin® RG57 FR is a very fast 2-component polyurethane low pressure RIM system for manufacturing of flame retardant parts. The Product must be processed with an adequate equipment.  

  • Certified flame retardant properties
  • Simulation of ABS
  • High dimensional stability
  • Good flow behavior
  • Short demolding time
 
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Overview

PRODUCT BENEFITS

  • Certified flame retardant properties
  • Simulation of ABS
  • High dimensional stability
  • Good flow behavior
  • Short demolding time
 

Areas of Application

SikaBiresin® RG57 FR is designed for manufacturing of stiff housings and coverings for electrical appliances and machine cladding.
Due to its flame retardant properties, it is particularly suitable for components in railway interiors and exteriors, such as wall and ceiling cladding, covers, lamp housings and bezels.
Its good flow behavior makes it well suited for the production of thin-walled parts with complex shapes and structures, such as ventilation ducts and parts with integrated reinforcement elements.
This product is suitable for experienced professional users only.  

Packaging

    

SikaBiresin® RG57 FR (A)

Hobbock

25 kg

SikaBiresin® RG500 (B)

Canister

20 kg

Drum250 kg
 

Product Details

Properties

Component A

SikaBiresin® RG57 FR

Component B

SikaBiresin® RG500

Chemical base

Polyol

 MDI-based isocyanate

Color

 

mixed

Beige, black

Brown

 Beige, black

Density

 

cured

1.30 kg/l

1.23 kg/l

1.30 kg/l

Mixing ratio

by weight

100 : 44

Viscosity (CQP029-4)

3800 mPa·s

110 mPa·s

Pot life (CQP021-4)

at 23 °C

55 seconds

Demolding time

10 minutes

Curing time

at 23 °C

1 day

Shore D hardness (CQP023-1 / ISO 868)

80 A, B

Tensile strength (CQP036-2 / ISO 527)

38 MPa A, B

Tensile elongation (CQP036-2 / ISO 527)

4 % A, B

Flexural strength (CQP027-2 / ISO 178)

70 MPa A, B

Flexural modulus (CQP027-2 / ISO 178)

2350 MPa A, B

Impact resistance (CQP038-2 / ISO 179)

20 kJ/m2 A, B

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

90 °C A, B

Shelf life

12 months

CQP = Corporate Quality Procedure

A) 60 °C aluminum mold

B) curing condition: after demolding 7 days at 23 °C

Application

Surface preparation

Surfaces must be clean, dry, and free from grease, oil and dust.
It is recommended to use wax-based release agents. For further information regarding Sika release agent consult the corresponding Product Data Sheet.

Application

The material and processing temperature shall be between 18 °C and 25 °C.
The mold temperature shall be between 20 °C and 60 °C. Increased mold temperature results in a shorter demolding time.

 

SikaBiresin® RG57 FR is processed using 2-component low-pressure equipment. These equipment must be specifically set up for processing the parts to be manufactured.
The mixing process is performed by dynamic or static-dynamic mixing units.
The mold temperature has a significant influence on the mechanical and thermal properties of the final part. In case of lower mold temperature those properties may be improved by a post curing process.

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.