Product Description: CUROX® M-402 is a transparent liquid mixture based on methyl ethyl ketone peroxide, primarily used as a curing agent for unsaturated polyester resins.It has been modified to reduce sensitivity and is primarily used for casting buttons or button blanks at room temperature, in combination with a small amount of cobalt accelerator. Technical Data:

Appearance: Colorless liquid
Active Oxygen Content: Approximately 9.9% (by mass)
Desensitizer: Aliphatic esters
Density (20°C): approx. 1.04 g/cm³
Viscosity (20°C): approx. 21 mPa·s
Solubility: Insoluble in water; miscible with esters and UP/VE resins
Critical temperature (SADT): approx. 60°C
Cold Storage Stability: Can be stored at temperatures below -25°C
Recommended storage temperature: Below 30°C
Shelf life at 30°C: 6 months from the date of delivery
Compliant 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 for use at room temperature. The standard dosage is 1–3% of the resin weight, combined with 0.2–2% of a 1% cobalt solution.The gel time for the resin + peroxide mixture is short, typically only a few hours, depending on temperature and resin type. The curing time for the resin + peroxide + accelerator mixture is also short, even when only a small amount of accelerator is added. Curing Properties: Exhibits moderate exothermic activity, resulting in low internal stress and a longer demolding time.By using the minimum required amount of accelerator, only slight discoloration will occur in the finished product. Processing Methods: Particularly suitable for processes requiring short gel times with low cobalt content, such as casting buttons or button blanks, as well as continuous impregnation (corrugated) sheets. Packaging: CUROX® M-402 is available in standard 5-kilogram and 22.5-kilogram polyethylene bottles. Disclaimer: The information and technical recommendations provided in this document are based on internal testing and local raw materials and are intended solely to provide an understanding of the product and its applications. The information does not constitute a warranty regarding the specific performance of the described product or its suitability for a particular application, nor does it provide instructions for use. The information does not guarantee the performance of the product or its shelf life, and we assume no legal liability, including any liability related to third-party intellectual property rights, particularly patent rights.We reserve the right to make any changes based on technical progress or further development. The applications and uses of our products in accordance with our technical recommendations are beyond our control and are the sole responsibility of the user. The user is obligated to carefully inspect and test the purchased products to verify their suitability for the intended use.

United Initiators CUROX®M-402 Methyl ethyl ketone peroxide 1338-23-4

Ready to Work with Yunno Chemical?

AKPEROX A1 Methyl ethyl ketone peroxide (MEKP)

AKPEROX A10 Methyl ethyl ketone peroxide (MEKP)

AKPEROX A2 Methyl ethyl ketone peroxide (MEKP)

AKPEROX A249 Methyl ethyl ketone peroxide and isopropylbenzene hydrogen peroxide MIXMEKP