AAP is an acetyl acetone peroxide formulation for the curing of unsaturated polyester resins in the presence of cobalt accelerator at room and elevated temperatures.
With the curing system AAP/cobalt accelerator a much faster speed of cure may be achieved than with curing systems based on a MEKP plus cobalt accelerator, at room and elevated temperatures. Normally the gel times with AAP are comparable to those with MEKP.
The system AAP/cobalt accelerator will give a higher peak exotherm than a standard MEKP/cobalt accelerator system. Due to this fact, is it recommendable to avoid the production of too thick laminates in one operation. At low temperatures a reasonable speed of cure is still obtained when AAP is used in combination with large amounts of cobalt accelerator possibly in combination with Accelerator (N,N-Dimethylaniline) as promoter.
