Product Description: CUROX? M-402 is a clear liquid mixture based on methyl ethyl ketone peroxide used primarily as a curing agent for unsaturated polyester resins. It is modified to minimize sensitivity and is mainly used for casting buttons or button tabs at room temperature in combination with small amounts of cobalt accelerators.

Technical data:

• Appearance: colorless liquid
• Active Oxygen Content: Approx. 9.91 TP3T (mass fraction)
• Desensitizer: Aliphatic ester
• Density (20°C): approx. 1.04 g/cm3
• Viscosity (20°C): approx. 21 mPa-s
• Solubility: insoluble in water, mixed with ester, UP/VE resin
• SADT: approx. 60°C
• Refrigeration stability: can be stored below -25°C
• Recommended storage temperature: below 30°C
• Activity maintenance period at 30°C: 6 months from date of delivery
• Complies with ElektroG (EU Directives: RoHS 2002/95/EG, WEEE 2002/96/EG)

Applications: CUROX? M-402 is primarily used as a curing agent for unsaturated polyester resins and can be combined with cobalt accelerators at room temperature. The standard dosage is 1-31 TP3T as supplied, combined with 0.2-21 TP3T of an 11 TP3T cobalt solution. Resin + Peroxide has a short gel time, usually only a few hours, depending on temperature and resin type. Resin + peroxide + accelerator also has a short cure time, even if only a small amount of accelerator is added.

Curing performance: Has a medium exotherm, resulting in less internal stress and longer mold release times. By using minimal levels of accelerator, there will be only a slight discoloration in the finished product.

Processing methods: Particularly suitable for processes with short gel times at low cobalt content, e.g. casting of buttons or button pieces as well as continuous impregnation (corrugated) sheets.

Packaging: CUROX? M-402 is available in standard package sizes of 5 kg and 22.5 kg polyethylene bottles.

Disclaimer: The information and technical recommendations provided in the document are based on internal testing and local raw materials and are intended solely for the purpose of understanding the product and application. The information does not constitute a guarantee of the specific performance of the products described or their suitability for a particular application, nor does it provide instructions for use. The information does not provide a guarantee for the performance of the products and shelf life and does not assume any legal liability, including with regard to the intellectual property rights of third parties, in particular patents. We reserve the right to make any changes in accordance with technical progress or further developments. The application and usage of our products in accordance with our technical recommendations are beyond our control and are entirely the responsibility of the user. The user is obliged to carefully inspect and test incoming products to verify their suitability for the intended use.