“Can oxygen inhibition be removed from cured parts without damage to the fully-cured substrate area? We are looking to change our process to include a nitrogen blanket, but have many components that cannot be completed due to the tackiness on the outer surface.
We tried CRC Brakleen which effected the cured surface area as well as the tacky coating.”
First of all, I would like to refer to an older reply made regarding the inhibition of cure: http://mpmn.canon-experts.com/2009/03/
CRC Brakleen is a very strong cleaning agent that contains tetrachloroethylene and dichloromethane or ketone (depending on the packaging used). As you already noticed, these are chemicals that easily remove the tacky layer, but also dissolve the cured adhesive. If oxygen inhibition cannot be avoided, the tacky layer should be removed with an isopropyl alcohol (IPA) wipe. IPA is less aggressive and is commonly used for this purpose. We would always recommend a wipe rather than a soak.