ELASTOSIL® RT 675 A/B

1 of 36 products in this brand
ELASTOSIL® RT 675 A/B is a pourable, addition-curing RTV-2 silicone rubber with a two-part formulation and a 1:1 mixing ratio. It features a very high hardness (Shore A) and excellent heat stability. This silicone rubber is particularly known for its high thermal conductivity, making it ideal for the encapsulation of electronic components.

Product Type: 2K (2 component) Sealant, Encapsulant, Potting Compound

Application Area: Batteries

Cure Method: Air Dry, Chemical Cure

Chemical Family: Silicones

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Special Features
  • Addition Curing
  • Flowable
  • Thermally conductive
  • Two-component

Applications & Uses

Application Area
Applications
  • Battery
  • Thermal Interface Management
Application Details

Encapsulation of electronic components

Processing

Caution:

    Only components A and B with the same lot number may be processed together. To ensure homogeneity of the material, the components must be stirred thoroughly before they are removed or processed in their containers, in order to uniformly disperse any filler that might have settled during storage.

Surface preparation:

    All surfaces must be clean and free of contaminants that will inhibit the cure of ELASTOSIL® RT 675 A/B. Examples of inhibiting contaminants are sulfur containing materials, plasticizers, urethanes, amine containing materials and organometallic compounds – especially organotin compounds. If a substrate’s ability to inhibit cure is unknown, a small scale test should be run to determine compatibility.

Mixing:

  • Component A of ELASTOSIL® RT 675 contains the platinum catalyst, component B the crosslinker. Even traces of the platinum catalyst may cause gelling of the component containing the crosslinker. Therefore tools (spatula, stirrers, etc.) used for handling the platinumcontaining component or the catalyzed compound must not come into contact with this component.
  • The two components should be thoroughly mixed at a 1 : 1 ratio by weight or volume.
  • To eliminate any air introduced during dispensing or trapped under components or devices a vacuum encapsulation is recommended.

Curing:

  • Curing time of addition curing silicone rubber is highly dependent on temperature, size and heat sink properties of the component being potted.
  • The reactivity can be adjusted within wide limits by adding Catalyst EP or Inhibitor PT 88 to suit the processing requirements of the particular application.
  • Catalyst EP increases the reactivity, i. e., pot life and curing time are reduced. Inhibitor PT 88 is a pot life extender and prolongs pot life and curing time.
Temperature

Curing time, thickness 1 cm

23 °C 24 h
70 °C 60 min
100 °C 30 min
150 °C 10 min

Properties

Catalyst Properties
ValueUnitsTest Method / Conditions
Dynamic Viscosity (A+B, of mix)50000mPa·sISO 3219
Mix Ratio (A:B)1:1parts by weight
Platinum Catalyst in Component (A+B)Component A
Pot Life (A+B, at 23°C)150minutesDIN EN ISO 2555
Cured Properties
ValueUnitsTest Method / Conditions
Density (at 23°C)2.3g/cm³DIN EN ISO 1183-1 A
Elongation (at break)20%ISO 37 Type 1
Permittivity5IEC 62631-2-1
Shore Hardness A80DIN ISO 48-4
Tensile Strength2N/mm²ISO 37 Type 1
Volume Resistivity10¹⁵ Ohm-cmIEC 62631-3-1
Uncured Properties
ValueUnitsTest Method / Conditions
Density (at 23°C, Componenet A)2.3g/cm³DIN EN ISO 2811-1
Density (at 23°C, Componenet B)2.3g/cm³DIN EN ISO 2811-1
Dynamic Viscosity (Component A, at 23°C)50000mPa·sISO 3219
Dynamic Viscosity (Component B, at 23°C)50000mPa·sISO 3219
Properties
  • Two-part, 1 : 1 mixing ratio
  • Very high hardness shore A
  • Excellent heat stability
  • High termal conductivity
Note

Cured for 30 min at 150 °C in a circulating air oven for cured properties.

Regulatory & Compliance

Certifications & Compliance

Packaging & Availability

Country Availability
Regional Availability
  • Africa
  • Asia
  • Europe
  • Latin America
  • Middle East
  • North America
  • Oceania