Expanding Adhesives?
Expanding Adhesives?
(OP)
Hi everyone. I'm trying to fill in a post-casting gap between two materials of differing CTEs, in a closed environment.
I'm looking for some sort of a slow cure (about 4 hours at appoximately 200 degrees F) adhesive that expands upon cure. Do any such materials exist out there?
Thanks a bunch!
Just to make sure, the adhesive does not need to be heat-activated, it's just it will have to cure in a high-temperature environment. Ideally it'd be a two-part mix adhesive.
I'm looking for some sort of a slow cure (about 4 hours at appoximately 200 degrees F) adhesive that expands upon cure. Do any such materials exist out there?
Thanks a bunch!
Just to make sure, the adhesive does not need to be heat-activated, it's just it will have to cure in a high-temperature environment. Ideally it'd be a two-part mix adhesive.





RE: Expanding Adhesives?
I would give the following company a call and discuss your requirements. They have been pretty good either with their products or referred me to another product.
http://www.masterbond.com/index.html
RE: Expanding Adhesives?
Some cylcic monomers expand when cured. There are some epoxies that do, I know as I once worked with a man who was developing them for dental adhesives.
Probably the easiest way to get expansion during cure is through expandable microbeads that expand when heated. You can add these to a normal adhesive formulation. The best known in Expancel from Akzo Nobel, contact www.expancel.com for more information.
RE: Expanding Adhesives?
RE: Expanding Adhesives?
Absolutely the right thing, as the adhesiveexotherms, the airin the beads expands a little...It is generally the ingredient in an expanding non-foaming type material.
RE: Expanding Adhesives?