Methyl ethyl ketone peroxide (MEKP) is organic peroxide, a high explosive similar to acetone peroxide, and is very dangerous to prepare. MEKP is a colorless, oily liquid at room temperature and pressure, while acetone peroxide is a white solid. It is slightly less sensitive to shock and temperature than acetone peroxide, and more stable in storage. It is prepared from butanone and hydrogen peroxide.
Dilute solutions of 30 to 60% MEKP are used in industry and by hobbyists as the catalyst which initiates the polymerization of polyester resins used in glass-reinforced plastic, and casting. For this application, MEKP is dissolved in dimethyl phthalate, cyclohexane peroxide, or diallyl phthalate to reduce sensitivity to shock. Benzoyl peroxide can be used for the same purpose.
MEKP is a severe skin irritant and can cause progressive corrosive damage or blindness.
However there are few occasions where catalyst is required upto 5%. For example you may choose to use an addition ratio of 4% for Polyester Resin, but we suggest for using 3% addition ratio. Our catalyst is usually enough in comparison to normal mixing ratio.