When working with 2 part epoxy glues, is there any interactions to be aware of? Brass, bronze, different metals to metals, synthetic & composite materials……? Thank You! Chipper 3-26-04
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I am not a big user of epoxy, but formulated and worked with it years ago.
Interactivity could come from two things; carrier solvents and the heat of reaction. Composits and synthetic material might be suspect, so i would do a test batch application before proceeding with a project.
Others here will probably give you more specific advice.
Dave
I know this isn't exactly what you meant, but: epoxy to skin allergic reaction. Don't get it on you. Might not bother you the first couple times, but after a while, you will build up a sensitivity. Then get a rash, cough, ect. Keep it off your skin.
If you get it on your skin, gritty orange hand cleaner is the best thing to use to clean it up. Vinegar will dilute it and allow it to get absorbed into your skin more. Greater risk of a reaction that way.
I've used a lot of epoxy when building small wood boats. It's great for most surfaces, but various plastics won't stick to it well. It's like most other glues. Needs a clean dry surface, free of oil or silicone, etc. Roughing up the surface can help it stick better.
"but: epoxy to skin allergic reaction. Don't get it on you."
Glatt,
I think you are partially correct. My understanding is that one can only have a allergic reaction to sometime containing protein, otherwise it is a toxic reaction. Either way, it's not good.
Jon
Biggest interaction is sunlight.
If epoxy is not painted or otherwised covered and it is exposed to light, it will breakdown. Additionally, be certain to scrub it with soap and scotchbrite pad before you paint it. Many, if not most epoxies, like West Systems, have something called aniline blush - this is a "film" that rises to the surface during curing. You can sand it off or wash it off, but it really must come off as the presence of the brush will substantially reduce the adherence characteristics of primers / paints.
Learned this all the hardway in boat building.
"but: epoxy to skin allergic reaction. Don't get it on you."
Glatt,
I think you are partially correct.
Jon,
I think you are partially correct.
Allergic reaction stems from the body's immune system. Only a few % of people eventually develop allergies to epoxy from frequent exposure.
You can develop allergies to allergens other than protein. You must have heard of allergies to base metals, organic and inorganic solvents.
Someone once told me he was allergic to money. No, that can't be true.
I think you are partially correct..money is allergic to ME..
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I was part of a study of gold allergies at Oregon Health and Sciences University which determined that I was, in fact, allergic to gold. The head of the study said that gold allergies are actually fairly common but not really a problem. Mine probably arose from have lots of gold crowns in my mouth. So, while I am not allergic to money, I am allergic to gold...
I'd like to help... Send me your gold..Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming.... WOW!!! What a Ride!
I have used Smith & Co. epoxies for a long time, and the owner/chief chemist there is a very cool guy who will answer your questions. They're in Richmond, CA and you can find their number using the internet yellow pages.
Some epoxies are mutagens. Don't matter much if you're past breeding, like me, I suppose.