RC Groups

RC Groups
    Composites Fabrication
        Help! Resins

#1 The_Builder Oct 26, 2012 04:24 PM

Resins
 
I have been a big fan of Resin Research and do still love their resin but their shipping speed is a little spotty. It seems like every time I make an error and get in a bind they sit on my order for a couple of days. That is not a great situation when operating on a shoe string budget.

I would like to find an East Coast supplier and a resin as good as Resin Research without having to sell one of kidneys. I know MGS is really good but are there others where I don't have to pay $25 for a box to ship it in?

Paul

PS, Does anyone have any experience with Poly Epoxy or Aero Epoxy?

#2 Curtis Suter Oct 26, 2012 06:05 PM

What about US Composites?
http://uscomposites.com/epoxy.html

http://www.rcgroups.com/forums/showthread.php?t=1135513

Curtis

#3 wyowindworks Oct 26, 2012 07:12 PM

Paul, you should give Adtech 820 a try. They often ship the day I order it. Just call and order a quart for testing. It's a little be more expensive than Resin Research, wets out better, and has a higher HDT potential.

http://www.adtechplastics.com/pc-64-...ng-system.aspx

Tech Sheet: http://www.adtechplastics.com/ADTECH...ies%20Tech.pdf

#4 The_Builder Oct 27, 2012 09:51 AM

Curtis be careful with US Composites, it will eat foam. I only use it for molds.

#5 Curtis Suter Oct 27, 2012 11:07 AM

Quote:

Originally Posted by The_Builder (Post 23113435)
Curtis be careful with US Composites, it will eat foam. I only use it for molds.

Huh? How so? You mean that it cannot be used for wings? Interesting. I guess I just wasted my money. Bummer. Thanks for the heads up.

#6 wyowindworks Oct 27, 2012 11:37 AM

Quote:

Originally Posted by CloudyIFR (Post 23113911)
Huh? How so? You mean that it cannot be used for wings? Interesting. I guess I just wasted my money. Bummer. Thanks for the heads up.

There are lots of people in the slope world who have made bagged wings over XPS with US Composites 635. Just do a little testing with your foam.

#7 Curtis Suter Oct 27, 2012 11:43 AM

Thanks Adam, I will. I wonder if The_Builder means a polyester resin? That I could see happening from my very limited knowledge of epoxy and no knowledge of chemistry! :o

Curtis

#8 The_Builder Oct 27, 2012 01:36 PM

Curtis, I did have some problems with the 635. It didn't happen all the time. You just need to be exacting in how you use it.

If you don't pull enough resin it will over heat and melt the foam. If you pull too much then the skins don't stick. It might be a good idea to do a room temp cure for 4-6 hours and then use your hot box.

Slopers can get away with more stuff than we can because they use more glass so they have a wider margin for error.

So Adam, you coming back to the fold? You should tell Curtis how the drips from your 635 resin jugs ate into your foam tray.

#9 wyowindworks Oct 27, 2012 01:48 PM

Quote:

Originally Posted by The_Builder (Post 23114849)
So Adam, you coming back to the fold? You should tell Curtis how the drips from your 635 resin jugs ate into your foam tray.

There are quite a few amine based hardeners that will melt XPS foam if it's in contact with the foam for long periods of time. The slab of foam that my epoxy sits on has lots of "eaten" spots. The uncured hardeners have been in contact with the foam for years.

In the end you just need to test, test, test. I've fondled quite a few successful wings that were made with USC 635. The slopers do have thicker laminates which would have much higher exotherm issues than thin ones. Force curing any resin with added heat will raise the exotherm temps.

#10 The_Builder Oct 27, 2012 02:00 PM

Thanks guys, the horse is buried.

#11 talonxracer Nov 03, 2012 04:31 PM

I have always had excellent success with the old jeffco 1307 as well as with the Rhino 1307LV after Rhino bought out Jeffco. http://rhinoliningsepoxy.com/product...rcraft/204/297

#12 Tehachapi Jim Nov 03, 2012 10:50 PM

What would you liken this resin to? MGS?

What does this resin and hardener cost for the smallest amount? Looks like 40 pd pails are the minimum.

Just curious and would like to hear a little more about your experiences with it.

Jim

#13 sarmoby Nov 04, 2012 12:29 AM

You all know that many curing agents are corrosive right?
We get curing agent samples in glass bottles due their tendency to eat the metal can they used to ship it in.

#14 Tehachapi Jim Nov 04, 2012 06:44 AM

I did FWIW. I believe the gentleman that built Sterling kits had to give it up because his reaction to epoxies had gotten so bad it was really messing with his health.

#15 talonxracer Nov 04, 2012 09:35 AM

Rhino 1307LV is available in 1 gallon containers, they are listed as 8pound quantities.

I havnt tried MGS so I cant make a comparison.


All times are GMT -5. The time now is 09:23 PM.