- Name: CUROX® M-200
- Chemical: Methyl ethyl ketone peroxide
- Appearance: Colorless liquid
- Active Oxygen Content: Minimum 9.0% w/w
- Sensitizer: Phthalate plasticizer
- Density (20°C): approx. 1.148 g/cm³
- Viscosity (20°C): approximately 23 mPa·s
- Solubility: Insoluble in water, but soluble in phthalates
- Primary Use: As a curing agent (free radical source) for unsaturated polyester and vinyl ester resins.
- Resin Types Suitable for This Curing Agent: Unsaturated polyester resins; particularly suitable for phthalate and isophthalate resins.
- Typical usage: 1–3% when supplied as is; 0.5–2% when combined with a 1% cobalt solution.
- "Shelf life" (gel time of resin + peroxide) is typically only a few hours, depending on temperature and resin type.
- "Pot life" (gel time of resin + peroxide + catalyst) is relatively short but can be extended by adding inhibitors.
- Other grades are available, including Curox M-100 and Curox M-300.
- Moderate heat release, resulting in relatively stress-free curing: Moderate mold release time.
- Low ambient temperatures significantly slow down full cure.
- When used at low temperatures, use Curox M-300 with polyester resins; using Curox M-100 with vinyl ester resins is also an option, but may result in a yellowish-brown discoloration of the finished product.
- Common accelerators may need to be added.
- Particularly suitable for hand lay-up, spray-up, centrifugal casting, fiber winding, resin casting, and surface coating processes (filler, putty, gel coat, and topcoat).
- When using spray equipment, follow the manufacturer’s instructions, ensure that all safety equipment is in proper working order, and do not clean the spray tip by spraying peroxide into the air.
- Store the product in a sealed container at temperatures below +30°C in a well-ventilated area.
- Keep away from sources of ignition and high temperatures; store separately from other hazardous and incompatible substances to prevent contamination.
- Avoid contact with skin, eyes, and clothing.
- Preventive skin protection measures are recommended; wear appropriate respiratory protection when necessary.
- The information in this document is based on internal testing and is intended to provide knowledge and experience regarding the product and its applications.
- The information does not constitute a guarantee of the specific performance of the described products or their suitability for specific applications, nor does it provide complete instructions for use.
- No warranty is given regarding the product or its shelf life, nor is any liability or legal responsibility assumed for any third-party intellectual property rights, particularly patent rights.
- The application and use of the product are based on technical recommendations and are the sole responsibility of the user, who is responsible for carefully inspecting and testing the received goods to verify their suitability.