Talk Composites - The Forum for Advanced Composites

High Temp No Post Cure Epoxy

http://www.talkcomposites.com/Topic9142.aspx

By SAE-SuperMileage - 1/10/2014 4:44:11 AM

Hey guys,

I am making a tricycle vehicle out of pre-preg carbon fiber. 

I need you to give me an advice on the epoxy I have to use for my female tool.
The plug is made of insulation foam. The highest temp it can reach is 60C/140F
We are using out of auto-clave pre-preg which must be cured at 120C/250F
Since we cannot use our plug to cure our carbon fiber we are making a tool out of fiberglass. 
The fiberglass tool will be used to cure the carbon fiber in an oven.

For the Fiberglass I must use high temp resistant epoxy that does not need post-cure and cures at room temperature. 
Do you know of any brand that makes these kind of resin. Do you suggest any alternative solution?

Please let me know.
By ChrisR - 1/10/2014 9:19:47 AM

unless someone has developed a super resin it does not exist, the way the resin builds it's strength requires heat to create the molecular chains within.

What you can try to find is a resin which you can cure at 40-50deg in the oven with the plug then demould and post cure to the temp you require. You need a resin which will not soften under high temperature post cure.

Or better still find an out of autoclave pre-preg which will do the above, look at the tooling pre-pregs as these often have a low initial cure temperature exactly for your situation.