vinyl-ester, PL and ZN kits

[Gray E Fowler]

Hey Tom

You are talking about a paint clearcoat right? The vinylester resin Tg is 
dependent on the peroxide used to catalize the resin. Most likely MEK 
peroxide wa sused as this one cures the resin at room temp, but also gives 
the lowest Tg about 50-55C, which is the same as most room temp cure 
epoxies. Going above this temp turns the resin to a rubber like state and 
you could possibly get a twisted fuse.  Best to keep the temp below 55C 
just to be safe. The urethane automotive paints cure rapidly at 45C 
anyway. Higher temps can cause premature solvent flash and a 
rougher-orange peel look.



Gray Fowler
Principal Chemical Engineer
Composites Engineering
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