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AKPEROX® A5R is a phthalate-free solution of methyl ethyl ketone peroxide (MEKP) (CAS No. 1338-23-4) in a 2,2,4-trimethyl-1,3-pentanediol diisobutyrate mineral solvent.
AKPEROX® A5R is an MEKP catalyst from AKPA recommended for use with a cobalt accelerator to promote the cure of unsaturated polyesters at room temperature. Formulated free of phthalates, this catalyst is suitable for use at 1% to 2% in the production of composite materials that come in direct contact with skin or food contact, including buttons and water tanks. It may also be used in curing FRP resins, gel coats, and more. AKPEROX® A5R should be used at a temperature of 25°C or higher and has a shelf life of 12 months.
Appearance: Colorless liquid
Diluent: 2,2,4-trimethyl-1,3-pentanediol diisobutyrate
Density @ 20°C: 1.00 g/cm³
Active oxygen content: 8.5% to 8.95%
Peroxide content: 33% to 37%
SADT: 60°C
Shelf life: 12 months
CAS No. 1338-23-4
Primary Chemistry: Methyl ethyl ketone peroxide
Methyl ethyl ketone peroxide in mineral solvent
Phthalate free
Cures unsaturated polyester resins
For room and elevated temperatures
Recommended for use at 1% to 2%
Used with cobalt accelerators for room-temperature cure
Slow or improper curing of unsaturated polyester resins
Failure to comply with phthalate-free regulations
Production of composite materials
Spray-up and hand lay-up FRP
Gel coat resins
Laminating resins
Polymer concrete and marble
Filament winding
Resin transfer molding
Buttons and continuous laminating
GRP pipe production
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