Technical Data Sheet
NOROX
MEC
Methyl ethyl ketone peroxide/Cyclohexanone Peroxide
CAS#1338-23-4
12262-58-7
Liquid mixture
Description
Norox MEC is a colorless solution of methyl ethyl ketone peroxide and
cyclohexanone peroxide in phlegmatizer. Norox MEC was developed to give
excellent cure performance in low and average temperature conditions when
used as an initiator with unsaturated polyester resins.
Technical Data
Active oxygen 9.0 max
Form: Liquid
Color: Water white
Specific Gravity @ 25 C: 1.12
Viscosity @ 25 C: 18.0 cps
Flash point (SETA C.C.) 170 F / 77 C, min
Soluble in: Oxygenated organic solvents
Slightly soluble in: Water
Maintenance of activity at 30 C as from date of
delivery
6 months
Application
Norox MEC should be considered for gel and cure initiation for cobalt
promoted unsaturated polyester resins at low operating temperatures.
Norox MEC will also give good performance at normal temperatures.
Other advantages, compared to standard MEKP formulations include:
1. Shorter gel to cure time in many resins.
2. Excellent smoothness and uniformity in the cure cycle.
3. Excellent storage stability because of the absence of
impurities (water, hydrogen peroxide, unreacted methyl ethyl
ketone and other diluents).
4. Enhanced performance with gel coats. (The hydrophobic
nature of Norox MEC provides improved mixing and resin
compatibility).
Technical Data Sheet
RESIN: Ortho Laminating (pre-promoted)
Initiator Gel Peak Gel to Barcol Hardness@
Time Exotherm Cure 3 hrs. 5hrs. 24 hrs.
Norox MEKP-9 15.9 min. 328 F 71 min. 5(4) 15(4) 34(4)
Norox MEKP-925 16.2 min. 336 F 76 min. 5(4) 7(4) 32(4)
Norox MEC 14.9 min. 330 F 61 min. 6(4) 16(4) 34(4)
Results determined by United SPI laboratory test methods and are to
be used for comparison, only.
Resin suppliers should be contacted for specific recommendations for
individual resins.
Resin: Typical ISO Marble Clear Gel Coat
Initiator Level: 2.0% Resin Temp: 77 F
Initiator Gel Peak Time to 20g Tack Barcol Hardness@
Time Temp Peak Peak Free 3hrs. 5hrs. 24hrs.
Norox MEKP-9H 13.8 min. 406 F 23.9 min. 344 F 79 min. 35(D) 55(5) 15(4)
Norox MEKP-925H 13.2 min. 423 F 24.0 min. 356 F 82 min. 15(5) 70(5) 20(4)
Norox MEC 11.6 min. 394 F 21.5 min. 358 F 75 min. 20(5) 60(5) 20(4)
Technical Data Sheet
PACKAGING, SHIPPING & AVAILABILITY
Technical Data Sheet
The standard package sizes of NOROX
MEC are 4×8 lb and 44 lb
(20 kg) polyethylene bottles.
NOROX
MEC is available pre-dyed in 44 lb (20kg) bottles. Please
see United Initiators, Inc. TDS for Peroxide Dye Concentrates.
Classification Please refer to the specific NOROX
MEC Safety
Data Sheet (SDS) under section 14 & 15, shipping & regulatory
information. NOTE: SDS s for all United Initiators, Inc. products may
be requested by contacting the company.
NOROX
MEC is available through a global network. Call United
Initiators, Inc. for the name of the distributor in your area
This information and our application-technical advice whether verbal, in writing or by way of trials reflect our present state of knowledge based on internal tests with local raw
materials. Their purpose is to inform interested parties about our products and their possible application. They should not be construed as guaranteeing specific product properties or
their suitability for a particular application. Furthermore, the information does not contain complete instructions for use. Nor does it constitute a guarantee as to quality and durability.
Changes due to technical progress and corporate advancement reserved. Any existing third-party copyrights are to be taken into account.
Application and use of our products based on our application-specific advice is beyond our control and sole responsibility of the user. The user is not released from the obligation of
verifying the suitability and applicability as to the intended purpose.
T: +49 89 74422 237
F: +49 89 74422 6237
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T: +86 20 6131 1370
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cs-initiators.cn@united-in.com
T: +61 2 9316 0046
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cs-initiators.au@united-in.com
www.united-initiators.com
Revision number: 1.0. Date: 12.09.14. Device M: TDS.