Description.

• CUROX? M-312 is a colorless liquid consisting of a mixture of peroxides based on methyl ethyl ketone peroxides desensitized primarily 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 - 9.2% (mass %)
• Hydrogen peroxide content: approx. 2.6% (mass %)
• Density (20°C): approx. 1.01 g/cm3.
• Viscosity (20°C): approx. 13 mPa-s
• Refractive index (20°C): approx. 1.431
• Flash point: approx. 57°C
• SADT: approx. 60°C
• Refrigeration stability: approx. -25°C
• Recommended storage temperature: below 30°C
• Storage stability from date of delivery: 6 months
• Standard packaging: 5 kg and 22.5 kg HDPE drums

Applications.

• Suitable for curing all unsaturated polyester resins in combination with cobalt accelerators at room temperature. Particularly suitable for resins based on phthalic and isophthalic acids.
• Standard Dose Levels: 1-31 TP3T as supplied, 0.5-21 TP3T with 11 TP3T cobalt solution.
• The "shelf life" (gel time of the resin + peroxide) is usually only a few hours, depending on temperature and resin type.
• The "conformal period" (gel time of resin + peroxide + catalyst) is relatively short, but can be extended by the addition of a TC-510 inhibitor. In this way, the mold release factor (fMR = tMR/tgel) can be significantly improved.

Curing Properties.

• Medium heat release, long mold release time, medium mold release factor.
• Temperatures below 20°C significantly extend the curing time, or cobalt/amine accelerators can be used.

Processing Methods:

• Particularly suitable for hand lay-ups, spray lay-ups, centrifugal casting, fiber winding, resin casting and surface coating (fillers, fillers, gelatine layers and topcoats).
• SPRAY EQUIPMENT: Use spray equipment according to manufacturer's instructions. Make sure all safety devices are functioning properly. Do not spray MEKP into the air to clean the gun.

Decomposition products.

• Decomposition products likely to be detected: methyl ethyl ketone, acetic acid

Storage.

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

Disclaimer.

• This information and further technical advice provided reflects United Initiators' current knowledge and experience with its products and applications based on its internal research and development. United Initiators makes no warranty of any kind with respect to the information provided, including specific descriptions of the product characteristics, its suitability for a particular application, and complete instructions for use. In addition, United Initiators makes no warranties regarding product and shelf life characteristics and assumes no liability for the use of the information provided.United Initiators reserves the right to make any changes based on technological advances or further developments. The use and utilization of our products based on their technical recommendations is beyond our control and is strictly at the user's own risk. The user is not relieved of the obligation to carefully inspect and test incoming products to verify their suitability for the intended application.