ORIGINAL: gluedoc
With materials 90 minutes and over (there are epoxies that cure in 1 week!), materials are cured with a wide variety of liquid amines. These amine cured epoxies are much stronger than the thiol cured materials, and in general, the longer it takes an amine cured material to cure, the stronger it will be. Many of the repair epoxies we use in the aerospace industry can, with clever processing, be made nearly as strong as autoclave cured prepreg laminates.
hey gluedoc, not tryin to hijack the thread here, but this question seemed in line with the discussion going on here. i am an aircraft structural maintainer in the USAF. we use a lot of epoxies (obviously) doing repairs to composite structures. one of the common ones we use cures in about a week at room temp or about 2 hours at 160*F. so just out of curiosity, does heat curing it affect the end strength?