Hi Rich - don't know if its helpful but even XY is permeable to vapors -
its just a couple of orders of magnitude better than the other typical
conformal coatings.

Dave

On Wed, Jun 14, 2017 at 1:43 PM, Richard Kraszewski <
[log in to unmask]> wrote:

> Does anyone know if a special  coating  type would be
> required/recommended  for a medical Ethylene Oxide sterilization process?
>
> Of course parylene would likely be the gold standard but it is not an
> option in this instance.
>
> I seem to recall that a past paper from Hunt/NPL supports  the theory that
> just about  all coatings are permeable to  vapors .    (~ also per 3-11G
> group)
>
> If that is  truly the case  not sure if it really matters which coating it
> is (not AR of course). Reason I am not willing to state that yet is I
> wonder  if Ethylene Oxide would have any other detrimental effect on
> certain classes of coatings  such as yellowing, embrittlement, etc.
>
> Any thoughts would be appreciated
>
>
> Rich  Kraszewski
> Senior Staff Process Engineer
> Plexus Engineering Solutions
>
>
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