Post-cure process for silicone rubber gaskets
Post-cure process for silicone rubber gaskets
(OP)
In order to minimize outgassing of siloxanes, a compression gasket used in military chemical protection filters must be cured in a vented oven at 400-500 °F for four hours. At least that's the current requirement but we still have outgassing issues. So, I am considering increasing the time and temperature of the post-curing process. I read somewhere that 450 °F is considered an effective upper bound to limit thermal stress on a conventional rubber (see top of page 5 of linked document). Does anyone have hard data to back that up? My thought was to change the requirement to 450-500 °F for at least eight hours. Any suggestions would be appreciated.
Tom Green
US Army Civilian





RE: Post-cure process for silicone rubber gaskets
Try out your postcure settings and test parts afterward to make sure there is no noticable property drop. I suspect things should be fine.
RE: Post-cure process for silicone rubber gaskets
RE: Post-cure process for silicone rubber gaskets