Product Description.

• CUROX? M-403 is a colorless liquid consisting of a peroxide based on methyl ethyl ketone peroxide, desensitized by a mixture of dimethyl phthalate.
• It is used as a source of free radicals to initiate unsaturated polyester resins, usually in conjunction with a cobalt catalyst.

Technical data.

• Appearance: Clear liquid
• Desensitizer: Dimethyl phthalate
• Active Oxygen (AO): approximately 9.71 TP3T w/w
• Hydrogen peroxide: approx. 1.71 TP3T w/w
• Moisture: approx. 1.5% w/w
• Density at 20°C: approx. 1.1 g/cm3.
• Viscosity at 20°C: approx. 20 mPa-s
• Flash Point: > 80°C
• SADT: approx. 60°C
• Refrigeration stability: below -10°C
• Recommended storage temperature: 0°C to 30°C
• Storage stability after shipment date: 6 months
• Standard packaging: 5 kg and 25 kg HDPE drums

Applications.

• Primary use is with cobalt catalysts for curing all unsaturated polyester resin types at room temperature.
• Standard dosage levels: 1-31 TP3T as supplied, 0.5-21 TP3T with 11 TP3T cobalt solution.
• The "pot time" (gel time of resin + peroxide + catalyst) is short relative to standard MEKP, but can be extended with the addition of Inhibitor TC-510.
• Moderate heat production. Relatively short demolding times. Curing times are significantly longer at temperatures below 20°C, when cobalt/amine catalysts or a mixture with acetylacetone peroxide should be used.

Storage.

• Avoid any source of heat, light and humidity and protect the product from impurities. Maintain within a safe temperature range.