Re: Anaerobic conductive epoxy?

Anaerobics are single-component acrylics and not epoxies. There is a huge difference : the 1st ones hardens through a free-radical process, while the latter crossling by slower step-growth polymerization.
The free-radical polymerization process is initiated by oxydo-reduction, UV or electron beam photopolymerization, just to mention a few.
Anaerobics are often used to bond metallic parts because acids contained in the adhesive attack the substrates and create the ions necessary to start the redox reaction. Once the reaction starts, peroxide or hydroperoxide are decomposed into free radicals which starts the free radical polymerization.
Problem : if you add metallic filler to get conductive adhesive, you destabilize it and probably won't be stable in bulk, even though you add inhibitors. As I worked on that type of adhesives, a few years ago, I didn't remember of any of our competitors buying conductive anaerobics. Maybe you can ask Loctite, who is the leader in that field, or companies such as Chemence, or Three Bond, which are very serious. But I remember lots of companies selling conductive epoxies that worked well, maybe the abovementionned companies. Take two-component epoxies and you probably won't be disturbed by anaerobic conditions, entrapment.
Hope this helps.
If you need any further help, don't hesitate to contact me.
Nicolas DELFAU
Peintures SOB
FRANCE
Tel : (+33)5.65.38.60.20
delfau@xxxxxxxxxx
 
 
"eromlignod" <eromlignod@xxxxxxx> a écrit dans le message de news: 1127846016.395817.224720@xxxxxxxxxxxxxxxxxxxxxxxxxxxx...
> Hi guys:
>
> I need to glue together two large sheets of a non-porous material
> face-to-face with a conductive or static-dissipative adhesive.  I have
> tried it with ordinary static-dissipative floor epoxy, but it never
> fully sets up and remains gooey and non-conductive, even when applied
> very thinly.  In areas where it is exposed to air it sets up fine.
>
> Is there another type of conductive adhesive I could use that doesn't
> require air to solidify?
>
> Thanks for any replies.
>
> Don
>
Loading