ISO-CAST® BRH
Label-free 1 kV cable joint casting resin
AM165-400 cable joint filled with ISO-CAST® BRH
ISO-CAST® BRH is a mineral-filled, removable, cold-curing 2-component casting compound based on liquid rubber resins. The material is free of isocyanates, epoxides and silicones. ISO-CAST® BRH does not require labeling according to the EU CLP regulation and can be considered advantageous in terms of occupa-tional hygiene. Due to its very high hydrophobicity, the compound is excellently suited as moisture protection in the telecommunications sector, in 1kV cast resin cable joints and for sealing many other electronic and electrical components. Even at low temperatures the material exerts virtually no mechanical stress on sensitive electronic components (Tg < -60°C) and reliably protects them against environmental influences. ISO-CAST® BRH has a medium casting viscosity. The cured product shows good adhesion to metal, ceramics and various plastics. This product does not fall under the EU diisocyanate training regulations. ISO-CAST® BRH is RoHS compliant according to EU Directives 2011/65/EU (“RoHS”) and 2015/863/EU (“RoHS III”).
Area of application
1 kV cast resin cable joints for electrical installations.
Technical data
Resin
Colour
Viscosity (25°C; rot.; 1 s-1)
Viscosity (25°C; rot.; 10 s-1)
Density (23oC)
Blue green
Approx. 7500 mPas
Approx. 7900 mPas
Approx. 1,50 g/cm³
Hardener
Colour
Viscosity (25°C; rot.; 1 s-1)
Viscosity (25°C; rot.; 10 s-1)
Density (23oC)
Yellow
Approx. 5500 mPas
Approx. 5400 mPas
Approx. 0,94 g/cm³
Mixture
Mixing ratio resin : hardener
Colour
3,9 : 1 parts by weight
Dark green (other colours on request)
Density (23oC)
Approx. 1,32 g/cm³
Pot life (23°C)
Gel time (23°C)
Approx. 15 min
Approx. 25 min
Mixed viscosity (25°C; rot.; 1 s-1)
Mixed viscosity (25°C; rot.; 10 s-1)
Approx. 16000 mPas
Approx. 7500 mPas
Dielectric strength
> 5 kV/mm
Cured product
Mixing ratio resin: hardener
under standard curing condition
3,9 : 1 parts by weight
(14 days 23°C / 50% relative humidity) unless otherwise stated
Hardness Shore A
(23°C; 14d RT 50% rel. h.)
Hardness Shore A
(23°C; oven curing: 4hRT + 24h80°C)
Approx. 10
Approx. 12
Temperature resistance
Approx. 120°C
Glass transition temperature (midset)
< -60°C
Tensile strength (5A specimen)
(2 mm thickness; speed: 10 mm/min; 23°C)
Elongation at break (5A specimen)
(2 mm thickness; speed: 10 mm/min; 23°C)v
Approx. 0,55 N/mm2
Approx. 450%
Tear resistance
(W-specimen; incision; speed: 10 mm/min; 23°C)
Approx. 0,90 N/mm
Dielectric strength
Approx. 40 kV/mm
Coefficient of thermal expansion
Approx. 225×10-6 K-1
Water absorption after 28 days
in water (immersion; 23°C)
Approx. 0,70%
Water vapour permeability
(75% relative humidity; 23°C; 1 mm thickness)
Approx. 2,00×10-5 g/(Tag×mm2)
Storage and transport
Store in a dry and airtight, closed container at 10 – 35°C. Can be stored for at least 12 months in original sealed containers under the above conditions. Short-term deviations during trans-port and storage are acceptable.
Cleaning
To ensure good adhesion of the cast resin the customer should individually test the suitability of the involved surfaces. Possible pre-treatments like cleaning, activation processes (plasma process) etc. should also be taken into account. The contact surfaces should be free of dirt such as dust, grease or water. For cleaning we recommend ISO-RC® Degreaser for wipe degreasing or ISO-RC® Flux-Off + ISO-RC® Spraywash for spray degreasing (available in 400 ml spray cans).
Processing
Stir up the resin container thoroughly before use to remove any possible sedimentation. Weigh the resin and hardener in the desired mixing ratio and mix for 1 – 3 minutes (depending on mixed quantity and processing time). Apply suitable mixing speed in order to ensure complete homogeneous mixing without introducing too many air bubbles into the reaction mass. The ideal processing temperature is 20 – 25°C. In general, curing is delayed at lower temperatures and accelerated at higher temperatures. When using a double chamber bag, empty the corners thoroughly and knead for 3 minutes. Before casting, a homogeneous mass, free of streaks, must be obtained. Pour immediately afterwards and do not scrape the mixing vessel. Air bubbles that have been stirred in, can be removed before the end of the potlife by evacuating the material or carefully fanning the surface with a hot air gun. Machine casting is also possible.
The EC safety data sheet provides information on safety-relevant product properties.