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acrylic vs. chemical reaction test (in Progress) - Page 4

post #31 of 64
I just skimmed the first few posts and I got the jist that it had been concluded that isopropyl does nothing to acrylic. I was just trying to make it clear it DOES do something to certain kinds of acrylic, and it is also possible Swiftech may have used different acrylic formulas to make the MCRES because I just tested with a broken one I had lying around, and it did nothing. The first one however clearly was destroyed by a very small amount of isopropyl.
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post #32 of 64
Quote:
Originally Posted by MomijiTMO View Post
Got any fluoroantimonic acid handy? Just kidding

My position still stands. Acetone + acrylic = no acrylic. However not many people have acetone [well pure acetone] around the place but everyone has rubbing alcohol [which should not contain acetone and I don't see ethanol reacting with acrylic #__#]

PS : Hydrofluoric acid reacts with glass so I don't think people tend to have that lying around the place.
Also, isn't Hydrofluoric acid a poison?

Edit:
Quote:
Originally Posted by Wikipedia
Hydrofluoric acid is corrosive and a contact poison. It should be handled with extreme care, beyond that accorded to other mineral acids, in part because of its low dissociation constant, which allows HF to penetrate tissue more quickly. Symptoms of exposure to hydrofluoric acid may not be immediately evident. HF interferes with nerve function and burns may not initially be painful. Accidental exposures can go unnoticed, delaying treatment and increasing the extent and seriousness of the injury.[2] HF is known to etch bone, and since it penetrates the skin it essentially breaks the person's bones without destroying the skin.[1] Hydrogen fluoride is released upon combustion of fluorine-containing compounds such as products containing Viton and Teflon parts. Hydrogen fluoride converts immediately to hydrofluoric acid upon contact with water.
HF chemical burns can be treated with a water wash and 2.5% calcium gluconate gel[3][4][5] or special rinsing solutions.[6][7]
Sounds painful.
Edited by mrtn400 - 6/7/08 at 11:41pm
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post #33 of 64
Thread Starter 
Alright, I'll give you credit this IS good information. Offhand I'm thinking this is Chinese wonabe acrylic. Asian acrylic has, from what I have seen, been inferior to what we have in North America. I have seen but never used this acrylic except as a pattern. I have done work for many internationals usually on the way around the world by sailboat. The short list includes French, Brits, South Africans, Italians, South Africans, Zealanders, and Australians. In about that order. Had one in just this week from South Africa. Everyone in the States know we are receiving inferior products from China. Its all over the news. Just one more reason to get a custom reservoir from one of our fabricators on this forum. For members not in the States, I don't know what to well you. Please tell us your experiences.

Back to Asian acrylic, if it is tinted I can see it before it comes in the door. The reason is that the tint fades to pink or purple instead of going clear.

I am not trying to piss anyone off. Please share any info or experiences to make this a worthwhile endeavor and not some half assed experiment.
Edited by Gom Jabbar - 6/8/08 at 12:02am
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post #34 of 64
Be careful with all these chemicals. Ha! You need an MSDS notebook!

I await the results!
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post #35 of 64
Thread Starter 
Thanks for the post mrtn400, I use this chemical occasionally to etch glass. It is very dilute. I got some on my hand today when compiling my list and it does have a mild burning or tingling sensation when diluted. I will be using gloves and a mask during the experiment for protection and now I'm thinking about a ventilation hood.
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post #36 of 64
Thread Starter 
I hope OSHA don't show up while I'm in the middle of this.
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post #37 of 64
Thread Starter 
Because of my concern of people damaging their acrylic and possibly their system I have edited my OP with the following.

Edit> Please refrain form using iso alcohol on acrylic until research has been done and more testing completed. Concerns have been raised about older acrylic formulas (perhaps only 1yr or older) and the possibility that some brands of alcohol may contain small amounts of acetone that will cause damage and even failure of the acrylic. Use at your own risk.

I'm looking for someone with a chemistry background and lab equipment to test different brands of alcohol for traces of acetone or other chemicals. Please PM me or post if you are interested.


I think I might have gotten a little carried away this experiment. I've even considered suspending or canceling because I could see were my results could be misleading or harmful. If I use a disclaimer that you may not get the same results with different types of acrylic and the user not have a way to tell what type of acrylic he has then it has no real world usefulness. I do not want to quite, that seems like a cop out to me. My plan as of now is to do an alcohol only experiment with a disclaimer. I know this is a poor compromise. I hope to do the other chemicals you have all suggested after I get a grip on the alcohol experiment.

I need to do some background research on alcohol and acrylic. I'm hoping some of you will send me samples of old or damaged reservoirs from different manufactures for analysis.

Sorry guys, this is the best I could come up with. Please give me some input.
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post #38 of 64
The damage to my MicroRes was indeed from 70% Isopropyl Alcohol that was left in the unit overnight after vinegar had no effect on the 'gunk' in the bottom. It isn't really damaged per say as I'm still using it. What had happened was a crazing effect of the interior surface.

You aren't doing this test for naught. This is great info for both people that have been LC for a while & those that are just starting. The never ending battle against the grime!!!

{Edit} I think your disclaimer including the type(s) of Acrylic you used in your testing would be more than sufficient & would stop any flaming that would occur(with any luck)
Edited by Indignity - 6/8/08 at 5:01am
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post #39 of 64
Quote:
Originally Posted by Indignity View Post
The damage to my MicroRes was indeed from 70% Isopropyl Alcohol that was left in the unit overnight after vinegar had no effect on the 'gunk' in the bottom. It isn't really damaged per say as I'm still using it. What had happened was a crazing effect of the interior surface.
Just to play Devil's Advocate here, how do you know the isopropyl alcohol caused those issues if the bottom of the reservoir was covered by gunk? As far as you know, the gunk could have caused the abrasions.
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post #40 of 64
Quote:
Originally Posted by stargate125645 View Post
Just to play Devil's Advocate here, how do you know the isopropyl alcohol caused those issues if the bottom of the reservoir was covered by gunk? As far as you know, the gunk could have caused the abrasions.
Because I attempted to soak it with a vinegar solution first, which did nothing. Noted nothing abnormal because there was still 'gunk' within the res. At this point I grabbed the bottle of alcohol to see if it would have any effect on said gunk. When the res dried, that's when I noted the crazing (or what looked like a bunch of cracks) on the interior walls. Like I said, the unit is still actively being used, but not a showpiece and well away from any components.
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