Technical Data Sheet
INITIATORS
NOROX MEKP-9
Methyl ethyl ketone peroxide
CAS#H1338-23-4
Liquid mixture
Description
NOROX MEKP-9 is a methyl ethyl ketone peroxide in phlegmatiser for the
curing of unsaturated polyester resins at ambient temperature in combination
with cobalt accelerators. NOROX MEKP-9 gives consistent room
temperature performance with both resins and gelcoats. NOROX MEKP-9 is
a reliable product of remarkable purity and is available globally. NOROX
MEKP-9 assures quality in almost every system.
Technical Data
Active oxygen content 9.0
Water content 1.2%
Appearance Colourless and clear liquid
Specific Gravity at 20 C: 1.11 – 1.14
Flash point(Seta closed cup) > 75 C (> 170 F)
SADT: 65 C (149 F)
Soluble in: Oxygenated organic solvents
Slightly soluble in Water
Storage temperature Max 25 C (77 F)
Application
NOROX MEKP-9 is an excellent liquid general-purpose cure initiator for the
room temperature cure of polyester resins. In this application it imparts medium
to high exotherm characteristics to the cure.
NOROX MEKP-9 is highly refined and substantially free of polar compounds
such as water, hydrogen peroxide, glycols and methyl ethyl ketone. NOROX
MEKP-9 give therefore excellent performance as a curing agent for gelcoats,
especially US formulated gelcoats.
Resin suppliers should be consulted for specific recommendations for individual
resins.
NOROX MEKP-9 gives slightly longer gel time then NOROX KP-9.
Depending on the working conditions, normal dosage level is 1 3% based on
the resin.