melting point of superglue

EEYORE, Fri Mar 03 2006, 12:26AM

hello all, i was wondering if anyone here knows what point superglue melts. I have glued some capacitors together and wish to separate them. 500F definalely did it but also did my capacitors too,oops!

Thanks,
Matt
Re: melting point of superglue
..., Fri Mar 03 2006, 12:32AM

I don't think it does amazed
I have two experiences with hot super glue...
One of them is when I glued the top cap onto an 811a tube, and it does not even start to stink at temperatures close to the mp of solder (the envelope is hot enough to so so).
The other was a cap that had some ca on the leads, and as I was soldering it I couldn't figure out why the solder wouldn't stick, until I got hit by a cloud of ca fumes dead Man that was nasty, my eyes were watering for like 5 minutes.

Good Luck!

Could you try acetone?
Re: melting point of superglue
EEYORE, Fri Mar 03 2006, 06:37AM

... wrote ...

I don't think it does amazed
I have two experiences with hot super glue...
One of them is when I glued the top cap onto an 811a tube, and it does not even start to stink at temperatures close to the mp of solder (the envelope is hot enough to so so).
The other was a cap that had some ca on the leads, and as I was soldering it I couldn't figure out why the solder wouldn't stick, until I got hit by a cloud of ca fumes dead Man that was nasty, my eyes were watering for like 5 minutes.

Good Luck!

Could you try acetone?

I tried acetone and rubbing alcohol, neither worked...at all...I tried baking them, just killed the caps(split open)...Sigh, they are no good to me...I guess ill just get some more...

Matt
Re: melting point of superglue
Eric, Fri Mar 03 2006, 09:20AM

Acetone does work, it just needs a little time. I seperated some stuff I had glued together by soaking in a bottle of acetone overnight. In the morning it had all fallen apart.
Re: melting point of superglue
cbfull, Fri Mar 03 2006, 04:59PM

I tried supergluing some plastic parts together once that were constantly exposed to steam. The glue would only hold in the beginning, and then it would spread out leaving a white residue, and no more bond. Perhaps the high temp/humidity combination destroys the bonds?

I was going to suggest blowing steam on the bond for a couple of hours, but I can't say that the moisture would be good for the caps.
Re: melting point of superglue
4ensic, Fri Mar 03 2006, 07:00PM

I don't know how the caps would handle it, but Sirchie has a great cyanoacrylate cleaning solution. You might try it!

Link Link2

Re: melting point of superglue
joshua_, Mon Mar 06 2006, 12:09PM

..., you got very lucky. Don't ever experiment with melting or vaporizing superglue, and don't use it in any application in which it might possibly melt or vaporize. The fumes are very very toxic (as I recall, part of it is cyanide gas). Be very very careful.

Acetone is probably what I'd suggest -- keep swabbing it and poking at it and brushing it, and it should dissolve.

(...along with the varnish on your table.)
Re: melting point of superglue
Dr. Shark, Thu Mar 09 2006, 09:12AM

Just a little theoretical note here: Unlike other glues, superglue does not work by evaporation of a solvent, but by a chain reaction which goes by the name of polymerisation. This means that once superglue hardens, it turns into one single big messy molecule, and neither heat nor solvents will neccecarily undo this reaction. Heat will eventually break down (not melt) superglue, but lots of nasty fumes will be released.
Conclusion: Dont even try, just get it apart mechanically. Thats what works for me.
Re: melting point of superglue
Bored Chemist, Fri Mar 10 2006, 07:04AM

The solvent doesn't need to undo the reaction. Acetone is a fairly good solvent for the polymer.
Heat undoes the reaction pretty well. IIrC that's part of the manufacturing process.