CUROX M-102

Curox M-102 provides reasonably short demoulding times, i.e. good mould-release characteristics for many VE/UP formulations.
Curox M-102 is used only in well-controlled industrial settings with appropriate ventilation, PPE, storage & handling protocols.
Curox M-102 is used as an initiator (radical source) in the curing of unsaturated polyester resins and surface coatings (fillers, gel-coats, putties, and top-coats).

CAS Number: 1338-23-4
EC Number (EC / EINECS): 700‑954‑4
Chemical Name: Methyl ethyl ketone peroxide
Chemical Formula: C4H10O4
Molecular Weight: 122.12 g/mol

SYNONYMS:
Methyl ethyl ketone peroxide, MEKP, 2-Butanone peroxide, Ketone peroxide, MEKP mixture

Curox M-102 is not a stand-alone “monomer / polymer” raw material — it is a initiator/curing agent.
Curox M-102 must be handled under strict chemical safety procedures.
Curox M-102 is not suitable for consumer-level use.

Curox M-102, in the form of a colorless liquid, is ketone peroxide consisting of peroxides based on methyl ethyl ketone that has been de-sensitized with aliphatic ester.
Curox M-102 is a hardener and initiator for curing of unsaturated polyester resins.

Curox M-102 has aliphatic ester as a de-sensitizing agent and the lowest H2O2 content.
Curox M-102 is recommended for curing of molded parts, hand lamination, spray lay-up, centrifugal casting, filament winding, and casting of resins.

Curox M-102 has a shelf life of 6 months.
Curox M-102 is a colourless, mobile liquid, consisting of peroxides based on methyl ethyl ketone, essentially desensitised with aliphatic ester.

Curox M-102 is a methyl ethyl ketone peroxide used as a curing agent for unsaturated polyester and vinyl ester resins.
Curox M-102 is a methyl ethyl ketone peroxide (MEKP) based organic-peroxide mixture / initiator.

USES and APPLICATIONS of CUROX M-102:
Curox M-102 is used primarily in polymer/composite industry.
Curox M-102 is used curing (crosslinking) unsaturated polyester (UP) resins at ambient temperature (room temperature), often in combination with cobalt-based accelerators.

Curing vinyl-ester (VE) resins — Curox M-102 is used in composite parts manufacturing.
Typical processing methods of Curox M-102: hand-lay up, spray-up (gelcoats, topcoats), filament winding, centrifugal casting, casting of large moulded parts, surface coatings, fillers, putties, gelcoats, topcoats.

Dosage typical: about 1–3% (w/w) of Curox M-102 (as supplied) in the resin, plus 0.5–2% of a cobalt accelerator solution (or equivalent catalyst) — depending on resin type/reactivity.
Curox M-102 produces moderate heat during cure → results in low internal stress in the cured polymer (good for large parts).

Curox M-102 provides reasonably short demoulding times, i.e. good mould-release characteristics for many VE/UP formulations.
Curox M-102 is used only in well-controlled industrial settings with appropriate ventilation, PPE, storage & handling protocols.

Curox M-102 is used as an initiator (radical source) in the curing of unsaturated polyester resins and surface coatings (fillers, gel-coats, putties, and top-coats).
Primary application of Curox M-102: For curing large molded parts at room temperature with cobalt catalyst.

Curox M-102 is used for curing of unsaturated polyester resins, suitable for all unsaturated polyester resin types and vinyl ester resins.
Standard dosage level of Curox M-102: 1-31 TP3T of supply, with 0.5-21 TP3T of 11 TP3T cobalt solution (or alternative cobalt amine catalyst).
The "shelf life" (gel time of the resin + peroxide) of Curox M-102 is usually only a few hours, depending on temperature and resin type.

The "latency period" (gel time of resin + peroxide + catalyst) is relatively long, especially when Curox M-102 comes to curing ortho- or isophthalic resins.
PROCESSING METHODS: Curox M-102 is used particularly hand lay-up, spray lay-up, centrifugal casting, filament winding, casting of resins, and surface coatings (putties, fillers, gelcoats and topcoats).

Main application of Curox M-102: curing of large moulded parts at ambient temperature in combination with cobalt accelerators.
This ketone peroxide, Curox M-102, is used as an initiator (radical source) in the curing of unsaturated polyester resins and vinyl ester resins.

Curox M-102 is a methyl ethyl ketone peroxide used as a curing agent for unsaturated polyester and vinyl ester resins.
Curox M-102 is used as a hardener / curing agent / radical initiator for unsaturated polyester (UP) resins and vinyl-ester (VE) resins — for molding, casting, hand-lay up, spray-up, filament winding, centrifugal casting, etc.

-POLYESTER CURING use of Curox M-102:
Curox M-102 is used curing agent for UP resins at ambient temperature in combination with cobalt accelerators.
Curox M-102 is suitable for all UP resin types and for vinyl ester resins.

Standard dosage level: 1-3% as supplied, with 0.5-2% of a 1% cobalt solution (or alternatively cobalt amine accelerator).
"Shelf life" (gel time of resin + peroxide) usually only a few hours, depending on temperature and resin type.
"Pot life" (gel time of resin + peroxide + accelerator) relatively long, especially, when ortho- or iso-phthalic resins are to be cured.

-CURING PERFORMANCE uses of Curox M-102:
Moderate evolution of heat, therefore low internal stress.
Recommended for vinyl ester (VE) resins.
Relatively short mould release times, i.e. good mould release factors (fMR = tMR/tgel).

Temperatures below 20°C and/or some special resin types retard curing considerably.
Action: with UP resins use more active grade (CUROX M-202, 302, 402); with VE resins, add amine accelerator.

-SPRAY EQUIPMENT use of Curox M-102:
Curox M-102 is used spray equipment in accordance with manufacturer's instructions.
Ensure all safety devices are operational.
Do not clear gun by spraying MEKP into the air.

KEY ADVANTAGES of CUROX M-102:
Good balance between reactivity and safety/stability: moderate reactivity (enough to cure resins at ambient temperature) while being more stable than highly reactive peroxides.

Low water content, phthalate-free formulation → beneficial for resin quality & compliance (especially for vinyl ester / resin systems sensitive to water or plasticizer impurities).

Low exotherm during curing → Curox M-102 reduces internal stresses / warpage in large or thick parts.
Versatile — Curox M-102 is suitable for many processing methods (hand lay-up, spray-up, filament winding, casting, etc.), broad resin compatibility (UP and VE)

PHYSICAL and CHEMICAL PROPERTIES of CUROX M-102:
Chemical Name: Methyl ethyl ketone peroxide
CAS Number: 1338-23-4
Chemical Formula: C4H10O4
Appearance: colorless liquid.
Active Oxygen Content: approximately 8.61 TP3T w/w.
Antisensitizers: Use of fatty acid esters.
Density (20°C): approx. 1.01 g/cm³.

Viscosity (20°C): approx. 13 mPa-s.
Solubility: insoluble in water, miscible with ester, unsaturated polyester and vinyl ester resin.
Critical temperature (SADT): approx. 60°C.
Refrigeration stability: liquid can be below -25°C.
Recommended storage temperature: below 30°C.
The retention time of activity at 30°C is 6 months from the date of delivery.
CAS Number: 1338-23-4

EC Number (EC / EINECS): 700‑954‑4
Chemical Name: Methyl ethyl ketone peroxide
Chemical Formula: C4H10O4
Molecular Weight: 122.12 g/mol
Main active component: Methyl ethyl ketone peroxide (MEKP), 
“reaction mass of butane-2,2-diyl dihydroperoxide and dioxydibutane-2,2-diyl dihydroperoxide”
CAS number: 1338-23-4
Appearance: Colourless, mobile liquid

Density (20 °C): ~ 1.01 g/cm³
Viscosity (20 °C): ~ 13 mPa·s (low-viscosity)
Active oxygen content: ≈ 8.6% (w/w) — a measure of peroxide activity in the mixture
Miscibility / Solubility: Practically insoluble in water; miscible with esters, unsaturated polyester resins (UP), vinyl-ester resins (VE) and related organic resins/solvents
Self-Accelerating Decomposition Temperature (SADT): ≈ 60 °C (package-scale limit for storage/shipping)
Stability / Storage: Stable under recommended storage (cool, ventilated, < 30 °C). Keeps liquid down to low temperatures (liquid even < –25 °C)
Recommended storage temperature: Below ~ 30 °C
Shelf-life / Activity retention: At 30 °C, activity maintained for several months (manufacturer indicates ~6 months)

FIRST AID MEASURES of CUROX M-102:
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation: 
Fresh air.
*In case of skin contact: 
Take off immediately all contaminated clothing. 
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact: 
Rinse out with plenty of water. 
Call in ophthalmologist. 
Remove contact lenses.
*If swallowed:
After swallowing: 
Immediately make victim drink water (two glasses at most). 
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available

ACCIDENTAL RELEASE MEASURES of CUROX M-102:
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains. 
Collect, bind, and pump off spills. 
Observe possible material restrictions. 
Take up dry. 
Dispose of properly. 
Clean up affected area.

FIRE FIGHTING MEASURES of CUROX M-102:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2) 
Foam 
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

EXPOSURE CONTROLS/PERSONAL PROTECTION of CUROX M-102:
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:
*Eye/face protection:
Use equipment for eye protection. 
Safety glasses
*Body Protection:
protective clothing
*Respiratory protection:
Recommended Filter type: Filter A 
-Control of environmental exposure:
Do not let product enter drains.

HANDLING and STORAGE of CUROX M-102:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed. 
Dry.

STABILITY and REACTIVITY of CUROX M-102:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available