Aerospace & Defence

Aerospace silicones offer thermal protection solutions

24th June 2019
Alex Lynn

Momentive have just published two new product selection guides for their aerospace silicone adhesive sealants. They are ‘Silicone RTVs for Low Outgassing Applications’, advanced silicones that deliver outstanding performance with minimal outgassing, and ‘Silicone RTV’s for Thermal Protection Systems’, a broad range of advanced silicone RTVs that can perform in the most extreme conditions.

Low outgassing silicones
Low outgassing solutions are needed to protect crew compartments and sensitive optical equipment from material contamination in extreme temperatures. Momentive offers an expanding line of low outgassing silicones for sealing, protective coatings, electronics packaging, thermal interface materials, thermal protection systems and photovoltaic array assembly.

The grades meet or exceed the ASTM E-595 standard outlined in NASA SP-R-0022A and European Space Agency PSS-014-702.

Silicone RTVs for thermal protection systems
These silicones maintain critical properties for an extended time over a wide range of extreme temperatures encountered by spacecraft (-130°C to 260°C). They remain flexible in the extreme low temperatures of space and have excellent thermal insulation properties.

They are low outgassing and offer very high structural adhesion. They come in different viscosities from paste to flowable and some are electrically conductive.

Potential applications:

  • Cast in place heat shielding
  • Crew capsule applications
  • Thermal insulation of sensitive components
  • Protective coatings for critical equipment
  • Encapsulants & potting for high heat locations
  • Interior & exterior adhesives
  • Flexible composite coatings

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