Looks like a good epoxy resin

General Composites Discussions Products Talk
#1

I read through this data sheet and it looks like a good resin of choice, the geltime is long enough that you can vary the rate of infusion simply by moderating the temp during the infusion(ie by affecting the viscosity) without fear of it kicking too early. It looks like it has a good range of working tmeperatures but the post cure requirement is a slight turn off. Actually 50oC is not that bad, could do that with a IR lamp out in the open… I’m not too fond of the idea of crystallization within the container, although I’m sure many systems are prone to this, I have never encountered it. Anyone know when you would be prone to having your resin crystallize?

Enjoy…

feel free to comment.

http://www.ironbarkcomposites.com.au/images/resources/RIM935eng160306.pdf

#2

resin crystallize is when it is getting old and changes colors and starts to cure on it’s own.

#3

I’ve found out that the epoxy hardener is prone to crystallizing when stored at a cold temperature, i.e. shipping in winter.
A technical rep.from Huntsman told me, and he said to heat the resin to 150 deg F for about 1/2 an hour. It’s nothing to be worried about.

#4

What is DMA (on the Tecnical Data sheet?)

#5

DMA = Dimethyl Anline
Accelerator used in conjunction with BPO catalyst. More effective than DEA.

DEA = Diethylaniline
Accelerator used in conjunction with BPO catalyst or as a co-promoter for cobalt / Mekp systems.

BPO = Benzoyl Peroxide
The catalyst used in conjunction with aniline accelerators or where heat is used as an accelerator.

If you need more information on PER, look for a copy of CCP (Cook Composites and Polymers) Polycor book on eBay or old book stores…

#6

I’ve never seen epoxy crystalize. I have seen hardeners by themselves crystalize when left open to the air for a long period of time. That was the same hardener i don’t like… stuff smoked right out of the bottle like you knew if a lab rat took a wiff he would probably die right on the spot.

20_RC… I bet that is good epoxy… the same company says they make phenolic resins… FAA requires phenolic resins be used in any aircraft interior composites. That resin won’t make horrendous black smoke when it is on fire or burning.