Question about epoxy resin chemistry..

Richard Lamb wrote:
Blueskies wrote:

Yes, I guess that would be a big piece of glass (don't take anything out of context here!). Do the plans/instructions
have any other suggested way to lay up the panels?

As far as bending the finished panels, a two layer lay-up will be quite flexible, even fully cured, and as long as you
don't have to wrap around the LE I'm sure you will not have any problems with cracking. Have you looked at the
http://www.westsystem.com/ site? Good stuff...

--
Dan D.

.


I've been told that West does indeed make a laminating resin,
but this isn't it.

West 105/205 is absolute best stuff I've ever used - on wood.

It will probably be great on wood/foam structures.

But it's not what I ever use (again) for laminating glass fabrics.

I used to use Dow 330 / 147(?) but my source quit carrying it
(because I was the only one buying it?)

My impression is that resins like 330 that don't use MDA (Methyl
Diethel Amines???) share a common "problem". At low temperatures
they tend to "separate out". The resin has an odd lumpy look on
the surface and there will be a lump of soft rock candy in the center.

It is real simple to correct by immersing the resin container in hot
water for a while. When the soup is clear again, it's ready to use.

But if the resin is at all "crystallized", it won't completely set -
ever.

It even says so in the directions!
For those who read such things...

Got AeroPoxy(?) last resupply to make a new cowling for Leo's
Super Zodiac. I've used it before, no complaints (other than the
MDA toxicity?).


So, what is it that you are building?

Richard

Dyke Delta JD-2. http://www.ernest.isa-geek.org for the whole story.
The skins, turtleback and cowling are all fiberglass. Some builders
have also glassed the belly, tailfin and control surfaces (plans call
for fabric there).


--
http://www.ernest.isa-geek.org/
"Ignorance is mankinds normal state,
alleviated by information and experience."
Veeduber