- CUROX® M-300 is a colorless liquid consisting of a mixture of peroxides based on methyl ethyl ketone peroxide, desensitized with phthalate plasticizers.This methyl ethyl ketone peroxide is primarily used as an initiator (radical source) in the curing of unsaturated polyester resins and vinyl ester resins.
- Appearance: Colorless liquid
- Active Oxygen: Not less than 9.8% (mass percentage)
- Desensitizer: Phthalate plasticizers
- Density (20°C): approx. 1.148 g/cm³
- Viscosity (20°C): Approximately 23 mPa·s
- Miscible with water, but soluble in phthalates
- Critical temperature (SADT): approximately 60°C
- Recommended storage temperature: below 30°C
- Shelf life at temperatures below 30°C is approximately 6 months
- The initial curing temperature in unsaturated polyester resins is approximately 70°C
- Packaging: 5-kilogram polyethylene containers
- Used for curing unsaturated polyester and vinyl ester resins; used in combination with cobalt accelerators at room temperature.
- Standard dosage: 1–3% of the supply quantity, combined with 0.5–2% of a 1% cobalt solution.
- The "pot life" (gel time of the resin + peroxide mixture) is typically only a few hours, depending on temperature and resin type.
- The “working time” (gel time of resin + peroxide + catalyst) is relatively short but can be extended by adding inhibitors. Other grades include Curox M-100 and Curox M-200.
- Moderate heat generation, resulting in relatively low-stress curing: moderate mold release time.
- High ambient temperatures accelerate full cure. Use Curox M-200 to cure unsaturated polyester resins at high temperatures, and use Curox M-100 to cure vinyl ester resins.
- Particularly suitable for hand lay-up, spray-up, centrifugal casting, fiber winding, resin casting, and surface coatings (fillers, fillers, gel coats, and topcoats).
- Spray Equipment: Use spray equipment in accordance with the manufacturer’s instructions. Ensure that all safety equipment is in proper working order. Do not spray MEKP into the air to clean the spray gun.
- The product should be stored in a sealed container at temperatures below +30°C. Keep in a well-ventilated area. Keep away from sources of fire and heat (e.g., direct sunlight). Isolate from other hazardous and incompatible substances.
- Avoid contamination with rust, dust, and other particulates. Avoid contact with skin, eyes, and clothing. Wash hands before finishing work and before taking breaks. Preventive skin protection is recommended. Provide adequate ventilation if necessary. Use dust collection equipment to capture any product vapors generated. Avoid the formation of aerosols.Do not inhale vapors or aerosols. If necessary, wear appropriate respiratory protection. Peroxide residues must not be returned to the original container, as decomposition may occur.
- This information and all further technical recommendations reflect our current knowledge and experience based on internal testing using local raw materials and are intended to provide information about our products and their applications. This information should not be construed as a warranty regarding the specific properties of the described products or their suitability for specific applications, nor does it constitute complete instructions for use.This information does not constitute a warranty regarding the characteristics of the product or its shelf life, nor does it impose any legal or other liability on us, including liability related to existing third-party intellectual property rights, particularly patent rights.We reserve the right to make any changes based on technical progress or further developments. The use and application of our products based on our technical recommendations are beyond our control and are the sole responsibility of the user. The user is not relieved of the obligation to conduct careful inspections and tests to verify the suitability of the goods received for the intended application.