 Dissolving epoxy with dichloromethane
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mikeselectricstuff
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Mon Nov 05 2012, 10:05AM
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Registered Member #311
Joined: Sun Mar 12 2006, 08:28PM
Location:
Posts: 253
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Back in the days when you could buy dichloromethane based paintstripper (Nitromors), it was pretty good at dissolving epoxy - immerse for a few days and it would soften and swell. It would also delaminate PCBs in a about a week.
ISTR Robnor also used to sell a DCM based epoxy stripper many years ago.
However I recently bought some dicloromethane from Ebay, and it doesn't seem to have the same effect - is there a magic ingredient I'm missing for epoxy stripping?
I think both the paintstripper and Robnor stripper had methanol as well - any suggestions as to ratio?
It has been pretty cold here (not doing this indoors!) - would temperature be a major factor?
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Avalanche
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Registered Member #103
Joined: Thu Feb 09 2006, 08:16PM
Location: Derby, UK
Posts: 845
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Recently here at work we got a local transformer manufacturer to completely reverse-engineer a potted transformer (actually a magamp) and they dissolved the potting compound away using the stuff in the PDF I've attached.
It must be good because after the treatment they were able to easily unwind the previously potted cores and count the turns!
]epoxy_solvent.pdf[/file]
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mikeselectricstuff
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Registered Member #311
Joined: Sun Mar 12 2006, 08:28PM
Location:
Posts: 253
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That's the stuff I had a long time ago - I thought it had been discontinued but muat have just been that RS stopped stocking it.
I can't find an MSDS which may give some clues to contents.
5L +haz shipping is a bit much for the small board i want to melt...
I do have some old Nitomors - maybe I'll try freshening it up with some new DCM...
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