highly transparent epoxy needed
highly transparent epoxy needed
(OP)
I am looking for highly transparent epoxy for gluing/bonding a sandwich of optical crystal-"mirror film"-crystal together. The epoxy transparency should not age (operating temperature at 35C). The material should be strong as the sandwiches will be saw-cut later into thin 1.5mm slices/strips without breaking. The expoxy cannot be heat treated/cured as heat would damage the mirror film. Please advice.





RE: highly transparent epoxy needed
TTFN
RE: highly transparent epoxy needed
Here are two suppliers of optical grade epoxies. NuSil is new to me while I've used Masterbond numerous times.
There several other supplies out there.
htt
www.masterbond.com
RE: highly transparent epoxy needed
RE: highly transparent epoxy needed
I worked on a project a few years ago where we needed to bond silicon to silica, and although we did not need optical clarity, we needed room temperature cure. We found that Epotek 301 worked well, and it is also optically clear, since it was apparently designed to bond fiber optic bundles. In our tests, we were able to achieve several thousand psi of tensile strength, as long as all the parts were very clean. We also pretreated the silica components with a Silane solution to improve bonding, although this is probably not necessary for you if you just need enough strength to saw-cut. We had several sampled cut without difficulty.
Here is Epotek's optical adhesives:
http://www.epotek.com/categories.asp?ID=3#
and 301:
http:
Here is a silane pretreatment (Not the one I have used before, but I cant remember the brand of that one. This one similar so you get the idea.)
http://ww
Good luck