[sdiy] D-70 red goo of death

[Tom Wiltshire]

So any idea why caustic soda might work on it, David?

The posted stuff suggests that it's a polyurethane of some type. I know nothing about this material, besides a few applications where I've seen it.

I loved chemistry at school - for me it meant explosives and drugs, but that was the last time I did any! ;)
Even my chemistry teacher admitted to putting potassium permanganate in a town fountain, turning it a beautiful (but brief) purple colour!

T.


On 27 Jan 2013, at 18:08, David G Dixon <dixon at mail.ubc.ca> wrote:

>> Your only bet is to talk to a chemical engineer.. I wonder if 
>> David knows anyone in his dept who might know what to do..
>> 
>> Cheers,
>> D.
> 
> I have a degree in Chemical Engineering, but I've never worked as a chemical
> engineer.  Ever since my first job out of university, I've been an
> extractive metallurgist, and I've never done anything with organic
> chemistry.
> 
> The stuff you are describing sounds like some kind of thermoplastic polymer.
> Epoxies are crosslinked polymers which are untouched by most solvents
> (acetone, etc).  However, they don't generally soften and drip.  Is this goo
> melting?  In other words could you remove it by applying gentle heating to
> it (e.g., with a blow dryer) in a way that wouldn't also destroy the unit?
> It seems to me that anything that could melt could be dissolved (but I'm not
> really sure).
> 
> If you could determine exactly what the red goo is (by subjecting it to
> chemical analysis), then you could at least research what dissolves it (if
> anything).
> 
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