Non-Halogenated Hydrocarbon

"Any sample of non-halogenated hydrocarbon solvents?"

Gasoline, kerosene, diesel.....

.....white spirit, PlusGas, WD40.......

Non halogenated hydrocarbons are - octane, septane, nonane, decane &so on.

But term is odd and aromatics such as toluene, xylene, mesitylene might be OK sounds as if the halogens are the problem ? aluminium present ?? or are the glands the weak spot?

Try dry-cleaning benzine & white spirit, (petrol might leave a residue) first, then the aromatics.

Good answer, and you got one vote from me for that.

Wow. You woke up the junior high school chemistry class. Someone looked up in a chemistry book for octane, nonane, etc. These are poor solvents. You need something aromatic, like toluene (best), xylene (2nd best, lower flash point, slightly lower Kari-Bitanol point). These are "good" solvents for most chemicals, etc. I'd stay away from "hazardous" solvents like gasoline. The flash point is much too low for use as a solvent.

Go bact to the question (and the high school book) there are two types of hydrocarbon (non-halogenated) aliphatic and aromatic it would be daft to use an aromatic if an aliphatic would do the job. ? what is the problem material - glands or what?

I Have some viton gaskets inside the pump which must be protected or else everything will be haywire.

Ok. I think i need to put more info...(thanks guys for all the answers):

1. I have a mixer pump from Nordson which is used to pump this FIPG Material for use

in HDD Cover in place of the conventional rubber gasket.

2. This material however has been inside this pump and dispensing gun for almost 5yrs. when they stop production, they did not flush it out immediately.

3. So the material has been harden inside. Now, its my job to clean up this mess since we are going to used a new type of FIPG material and use back this old pump.

4. I try cleaning it manualy by dismantling the pump and remove as much as possible those remaining material.

5. But some of it hardened. Now i put back the pump and i need to flush it out using this "NON-HALOGENATED HYDROCARBON" to totally clean it up until i cannot find any residues coming out from the pump.

6. There is no alunimum in the pump but i have some rubber / viton gaskets inside.

Sorry I'm not good in chemistry thus i need your help guys/gals...

I hope this will be more clearer :-)

Hi yvi,

Thanks for the info update.

Having worked with polymers (and having to clean up messes!), there is no definitive way to predict which solvent will work, let alone the best one. Yea, there may be none that will wofk if the molecular weight / amount of crosslinking of the residue is too high.

You may have to use physical means (elbow grease) to get it out.

Every solvent mentioned here is worth a try, so do that first.

Some of the other posters have some good advice on that.

Best Regards,

Mike

Forgot to mention check out the toxicity - Toluene is very high - get MSDSs for them first.

The aliphatic hydrocarbones first - they are the safest - they all ignite easily and similar precautions needed for all.

Petrol is essentially an alphatic sio is less of a health hazard tha th aromatics - dry cleaning benzine is a safer form of gasoline/petrol - no additives!

Absolutely concur on obtaining the MSDS (material safety data sheet) for whichever product you choose to use. Available from the manufacturer/supplier, probably online, and if a generic version will do, SIRI.ORG has a website where you can get one for any solvent you are likely able to buy.

I found some time to do a little research on this today. Viton has good chemical stability, and mineral spirits or Stoddard solvent (V&PM solvent) should do at least a fair job on the residues. They are relatively benign, though not totally non-hazardous solvents. Hope this helps.

From the picture, this looks like it might be a two part adhesive system (?)

If it is polyurethane, which sounds possible since you say it is foam in place, acetone, MEK, xylene might be good solvents, but you might look at a solvent called NMP, which is very good urethane solvent.

You need to check on what is OK to use around the Viton.

Hi,

Just an FYI (for anyone who may need to know)

NMP = N-methyl-2-pyrrolidinone = N-methylpyrrolidone

Mike