Description.

• CUROX? M-202 is a colorless liquid consisting of a mixture of peroxides based on methyl ethyl ketone peroxides using desensitized aliphatic esters. This methyl ethyl ketone peroxide is mainly used as an initiator (free radical source) in the curing of unsaturated polyester resins. The main application is for curing molded parts at room temperature with cobalt accelerators.

Technical data.

• Appearance: Colorless liquid
• Active Oxygen: approximately 9.11 TP3T (mass %)
• Desensitizer: Aliphatic ester
• Density (20°C): approx. 1.01 g/cm3.
• Viscosity (20°C): approx. 16 mPa-s
• Not miscible with water, but miscible with esters and unsaturated polyester/vinyl ester resins.
• SADT: approx. 60°C
• Cold storage stability: liquid up to -25°C
• Recommended storage temperature: below 30°C
• Maintenance of activity below 30°C for 6 months from the date of delivery

Applications.

• Curing agent for unsaturated polyester resins in combination with cobalt accelerators at room temperature. Particularly suitable for resins based on phthalic and isophthalic acids.
• Standard Dose Levels: 1-31 TP3T as supplied, 0.5-21 TP3T with 11 TP3T cobalt solution.
• "Shelf life" (gel time of resin + peroxide) is usually only a few hours, depending on temperature and resin type.
• The "conformal period" (gel time of resin + peroxide + catalyst) is relatively short, but can be extended by the addition of the inhibitor TC-510. As a result, the mold release factor (fMR=tMR/tgel) can be significantly improved.

Curing Properties.

• Moderate heat production. Relatively long release times with moderate mold release factors. Temperatures below 20°C will significantly extend the cure time, or cobalt/amine accelerators can be used.

Processing Methods:

• Particularly suitable for hand lay-ups, spray lay-ups, centrifugal casting, fiber winding, resin casting as well as surface coatings (fillers, fillers, gelatine layers and topcoats).

Spraying equipment.

• Use spray equipment and follow manufacturer's instructions. Ensure that all safety devices are functioning properly. Do not clean the muzzle by spraying the MEKP into the air.

Measurement.

• Reactivity: "DIN 16945 Cobalt Curing" at 25°C using OPA resin (20 g).
• Formulation (wt.): Medium reaction resin type (OPA) 100, CUROX? M-202 2, Accelerator C-101 2.
• Curing data: gel time t gel [min] 2.0, max. curing time t max [min] 14.5, peak temperature T max [°C] 141.

Standard Packaging.

• Curox? M-202 is available in standard package sizes of 5 kg and 22.5 kg polyethylene bottles.

Disclaimer.

• This information and all further technical advice reflects our existing knowledge and experience based on in-house testing using local raw materials and is intended to provide information about our products and applications. This information should not be construed as a warranty of the particular characteristics of the products described or their suitability for a particular application, nor does it provide complete instructions for use. This information does not involve any warranty regarding the characteristics of the products and the shelf life, nor does it impose any legal or other liability on us, including liability in connection with existing third-party intellectual property rights, in particular patents. We reserve the right to make any changes in accordance with technical progress or further developments. The use and application of our products based on our technical recommendations is beyond our control and entirely the responsibility of the user. The user is not relieved of the obligation to carry out careful inspections and tests to verify the suitability of the incoming goods for the intended application.