1338-23-4

Product Description: CUROX® M-503 is a colorless liquid consisting of a peroxide based on methyl ethyl ketone, desensitized by a phthalate plasticizer. It is used as a free radical source for the initiation of unsaturated polyester resins. Main applications: Hand fabrication, spraying, continuous lamination, centrifugal casting, fiber winding and polyester concrete. Technical Data: Appearance: Colorless liquid Active oxygen content: approx. 9.51 TP6T w/w Free hydrogen peroxide content: approx. 3.51 TP6T w/w Water content: approx. 5.01 TP6T w/w Desensitizing agent: dimethyl phthalate Density at 20°C: approx. 1.12 g/cm³ Viscosity at 20°C: approx. 20

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 free radical source for the initiation of unsaturated polyester resins, usually in combination with a cobalt catalyst. Technical Data: Appearance: Clear Liquid Desensitizer: Dimethyl Phthalate Active Oxygen (AO): approx. 9.71 TP6T w/w Hydrogen Peroxide: approx. 1.71 TP6T w/w Moisture: approx. 1.51 TP6T w/w Density at 20°C: approx. 1.1 g/cm³ Viscosity at 20°C: approx. 20 mPa-s Flash Point: > 80°C Pro

Product Description: CUROX® M-402R is a red flowable liquid consisting of a peroxide based on methyl ethyl ketone, which is desensitized by means of an aliphatic ester. It is used as a curing agent for unsaturated polyester resins and its red color helps to ensure optimum homogenization in the resin mixture. Technical Data: Appearance: Red Liquid Reactive Oxygen Content: approx. 9.91 TP6T w/w Desensitizer: Aliphatic Ester Density at 20°C: approx. 1.04 g/cm³ Viscosity at 20°C: approx. 22 mPa-s Refractive Index at 20°C: 1.434 Solubility: Insoluble in water, soluble in esters, UP/VE resins Critical Temperature (SAD)

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 Reactive oxygen content: approx. 9.91 TP6T (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 esters, UP/VE resins Critical temperature (SADT): approx. 60°C Cold storage stability

Product Description: CUROX® M-370 is a colorless to slightly yellowish liquid mixture consisting of methyl ethyl ketone peroxide and acetyl acetone peroxide mixed through dimethyl phthalate. The main application is the curing of unsaturated polyester resins with cobalt accelerators at 20 - 40 °C for molded polyester parts at ambient temperatures. Technical Data: Appearance: Slightly yellowish clear liquid. Inhibitor: Dimethyl phthalate. Active Oxygen (AO): min. 7.71 TP6T w/w. Density (20°C): approx. 1.13 g/cm³. Viscosity (20°C): approx. 28 mPa-s

CUROX®M-340 Chemical name: Methyl ethyl ketone peroxide CAS No.: 1338-23-4

Description: CUROX® M-312R is a red liquid consisting of a mixture of peroxides based on methyl ethyl ketone peroxides desensitized mainly by fatty acid esters. The peroxide is used as a free radical initiator for unsaturated polyester resins cured at room temperature in combination with cobalt accelerators. It is suitable for curing molded parts at room temperature in combination with cobalt accelerators. The red peroxide allows for controlled homogenization in the resin and the red color disappears after curing. Suitable for special pre-accelerated and stabilized resin types. Technical Data: Appearance: Colorless Liquid Desensitizer: Fatty Acid Ester Active Oxygen (AO): min. 7.7 -

Description: CUROX® M-312 is a colorless liquid consisting of a mixture of peroxides based on methyl ethyl ketone peroxides desensitized mainly by fatty acid esters. The peroxide is used as a free radical initiator for the curing of unsaturated polyester resins in combination with cobalt accelerators at room temperature. Suitable for curing molded parts at room temperature in combination with cobalt accelerators. Particularly suitable for special pre-accelerated and stabilized resin types. Technical Data: Appearance: Colorless Liquid Desensitizer: Fatty Acid Ester Active Oxygen (AO): approx. 8.6 - 9.21 TP6T (% by mass) Hydrogen Peroxide Content: approx. 2.61 TP6T (% by mass)

CUROX®M-303R Chemical name: Methyl ethyl ketone peroxide CAS No.: 1338-23-4