ISO-SIL® 2500
Medium-viscosity silicone with good thermal conductivity
ISO-SIL® 2500 is an addition-curing 2-component silicone that cures at room temperature or can be cured with heat. The material is filled with a mineral that conducts heat well. This leads to improved heat transfer of the cross-linked material and at the same time good flowability of the uncured reaction mixture. ISO-SIL® 2500 is an electrical insulator and can be used wherever electrical insulation is required in combination with thermal conductivity. ISO-SIL® 2500 has good adhesion to metals and plastics. The hydrolysis resistance is excellent. The product also shows good mechanical damping properties and vibration resistance. The product is RoHS compliant according to EU Directives 2011/65/EU (“RoHS”) and 2015/863/EU (“RoHS III”).
Technical data
Component A
Colour
Viscosity (25°C; rot.; 1 s-1)
Viscosity (25°C; rot.; 10 s-1)
Density (23°C)
White
Approx. 3000 mPas
Approx. 2500 mPas
Approx. 1,55 g/cm³
Component B
Colour
Viscosity (25°C; rot.; 1 s-1)
Viscosity (25°C; rot.; 10 s-1)
Density (23°C)
Weißlich
Approx. 2500 mPas
Approx. 1600 mPas
Approx. 1,55 g/cm³
Mixture
Mixing ratio resin : hardener
Colour
1 : 1 parts by weight
White (other colours on request)
Density (23oC)
Approx. 1,55 g/cm³
Pot life (23°C)
Gel time (23°C)
Approx. 90 min
Approx. 150 min
Mixed viscosity (25°C; rot.; 1 s-1)
Mixed viscosity (25°C; rot.; 10 s-1)
Approx. 3500 mPas
Approx. 2200 mPas
Cured product
Mixing ratio resin: hardener
under standard curing condition
1 : 1 parts by weight
(14 days 23°C / 50% relative humidity) unless otherwise stated
Hardness Shore 00
(23°C; 14d RT 50% rel. h.)
Hardness Shore 00
(23°C; oven curing: 4hRT + 24h80°C)
Approx. 30
Approx. 56
Hardness Shore A
(23°C; 14d RT 50% rel. h.)
Hardness Shore A
(23°C; oven curing: 4hRT + 24h80°C)
Approx. 10
Approx. 10
Glass transition temperature (midset)
Approx. -44°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)
< 2 N/mm2
> 1000%
Tear resistance
(W-specimen; incision; speed: 10 mm/min; 23°C)
Approx. 0,80 N/mm
Dielectric strength
> 20 kV/mm
Thermal conductivity
Approx. 0,60 W/K×m
Tracking resistance (CTI)
> 600
UV resistance
Good
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 transport and storage are acceptable. For air transport, no special temperature control is required.
Cleaning
Weigh both components in the specified mixing ratio and mix for about 2 minutes while stirring slowly. Ideally, the mixing process should be carried out mechanically without introducing any additional air when mixing the components. Storage containers containing the product should not be under vacuum.
ISO-SIL® 2500 contains abrasive fillers. When using a mixing and dosing system, this point should be taken into account when designing the system.
The product is a cold-curing 2-component casting compound. Curing can be accelerated significantly by heating the cast component (e.g. at 80°C for a few minutes). Independent of the recommendations in this data sheet, you should carry out your own tests to determine the optimal process parameters and application properties in a specific case.
Caution: The cross-linking catalyst in the product can be destroyed by various compounds. These include, for example, amines, various heavy metals, sulphur compounds, isocyanates and others. Such substances must be kept away from the product components (even in small quantities). In the event of contamination, the curing of the material can be significantly slowed down or completely inhibited.
The EC safety data sheet provides information on safety-relevant product properties.
Processing
Beide Komponenten im angegebenen Mischungsverhältnis abwiegen und Approx. 2 Minuten unter langsamem Rühren vermischen. Idealerweise erfolgt der Mischprozess maschinell ohne weiteren Lufteintrag beim Vermischen der Komponenten. Vorratsbehälter mit dem Produkt sollten nicht unter Vakuum stehen.
ISO-SIL® 2500 enthält abrasive Füllstoffe. Bei Verwendung einer Misch- und Dosieranlage sollte dieser Punkt bei der Auslegung der Anlage beachtet werden.
Das Produkt ist eine kalthärtende 2-Komponenten Vergussmasse. Die Aushärtung kann durch Erwärmen des Vergossen Bauteils massiv beschleunigt werden (z.B. bei 80°C wenige Minuten). Eigene Versuche, um die optimalen Prozessparameter und Anwendungseigenschaften im konkreten Fall zu ermitteln, sollten unabhängig von den Empfehlungen dieses Datenblatts durchgeführt werden.
Achtung: Der Vernetzungskatalysator im Produkt kann durch verschiedene Verbindungen zerstört werden. Dazu zählen beispielsweise verschiedene Schwermetalle, Amine, Schwefelverbindungen, Isocyanate und andere. Derartige Substanzen müssen unbedingt (auch in kleinen Mengen) von den Produktkomponenten ferngehalten werden. Im Falle einer Kontamination kann die Härtung des Materials ggf. stark verlangsamt oder komplett inhibiert werden.
Über weitere Produkteigenschaften informiert das EG-Sicherheitsdatenblatt.