Uniquely Customized Ultra-Low-Outgassing Silicones to Reduce Contamination

摘要

Siliconematerials for space and aerospace applications are continually in development and evaluation to limit andnreduce the potential for outgassing contamination whilemaintaining essential physical and chemical characteristics.nSeveral agencies, such as NASA, historically recommend the American Society for Testing and Materials ASTMnE595 [“Standard Test Method for Total Mass Loss and Collected Condensable Materials from Outgassing in anVacuum Environment,” ASTM International, Std. ASTM E595, Alexandria, VA, 2007] test results of less than ornequal to 1.0% total mass loss and less than or equal to 0.1% collected volatile condensable material. These levelsnprovide an industry screening level for the acceptance or rejection of controlled-volatility materials for spacenapplications. By a comparison of controlled-volatility product CV10-2568 and ultra-low-outgassing productnSCV-2585, cured physical properties and outgassing profiles of these two products demonstrate that whennincorporating specific fillers, the cured physical properties can remain consistent while still providing exceptionalnoutgassing characteristics.