# Can superglue (cyanoacrylite) be thinned with acetone and still harden?

I'm looking for something with an extremely low viscosity to use as a binder for cold casting iron oxide with very fine detail (it's to make a slotted winding core for an electric motor with $$\pu{1mm}$$ slots). My plan is to thin out the superglue with acetone enough to make a slurry for pouring in the mold - possibly also mix in some water just before the pour to speed the setting process.

My question will superglue still harden if it has been thinned with acetone or would this destroy whatever properties that make superglue such a useful substance once it hardens? It's stated in many places on the internet that acetone works as a solvent for CA glue but this is only ever mentioned in the context of dissolving the end result.

• Superglue for modelers (hobby/craft stores) can be found in different viscosities. – Jon Custer Oct 3 '18 at 21:09
• The Iron oxide is extremely fine and requires a lot of mixing to get any liquid mixed through it - I would expect no matter what viscosity the glue came in it would start to set while I was still mixing it through. With a solvent I can wet it first and then mix the glue through with a longer working time (this is my theory - will put it to the test this morning). – norlesh Oct 4 '18 at 0:59
• The problem with using superglue for this is that it cures quickly and is likely triggered by the OH groups present in the surface of the iron particles. This makes it unlikely you will get good mixing. You probably need to find some alternative polymer where mixing can be done before adding a curing agent to trigger polymerisation. – matt_black Oct 5 '18 at 10:44

As you can see from the reaction of cyanoacrylate from Wikipedia, the carbonyl ($$\ce{C=O}$$) groups do not react with the cyano acrylate which means that acetone should not react with your super glue.