NOROX ? 400 is a colorless, flowable liquid composed primarily of technically pure tert-butyl peroxy-(2-ethylhexyl) carbonate. It is a carbonate monoperoxide with advantages in thermal stability and is used as an initiator (source of free radicals) in curing agents for unsaturated polyester resins. Main areas of application include hot compression molding of SMC or BMC at 130-160°C.

Technical data

• Appearance: colorless liquid
• Peroxide content: approx. 99% w/w
• Active oxygen content: approx. 6.43% w/w
• No inhibitors
• Density (20°C): approx. 0.93 g/cm3
• Viscosity (20°C): approx. 6 mPa-s
• Refractive index (20°C): approx. 1.428
• Critical temperature (SADT): approx. 70°C
• Refrigeration stability: below -30°C
• Starting reaction temperature: approx. 90°C
• Recommended storage temperature: not more than 30°C
• Maintenance of active properties from date of delivery: 3 months

appliance

• Curing agent for unsaturated polyester resins, temperature range: 130-160°C.
• Usage: 1-2% as supplied.
• "Shelf life" (gel time of resin + peroxide) can be weeks or months at room temperature.
• Sensitive to some fillers and heavy metal salts.
• By adding Inhibitor BC-500 with 0.1-0.31 TP3T, the "shelf life" can be significantly extended.
• The curing rate in the range of 85-95°C ("cracking" temperature) is not high unless there is an exothermic reaction (e.g., in an insulated mold).
• Short curing times of a few minutes can only be achieved in the optimal temperature range of 130-160°C for hot compression molding.
• Mainly used for hot compression molding of SMC or BMC, but also for coil impregnation (e.g. transformers).

wrap

• NOROX ? 400 comes in a standard package of 25 kg.

statement denying or limiting responsibility

• The information provided and all further technical advice reflects our existing knowledge and experience based on in-house testing of local raw materials and is intended to provide information about our products and applications.
• This information should not be construed as a guarantee of the specific performance of the product described or its suitability for a particular application, nor should it be considered as providing instructions for use.
• This information gives no warranty as to product and shelf-life performance, and no liability is assumed for the use of any information provided, including in relation to existing third-party intellectual property rights (in particular patents).
• We reserve the right to make any changes based on technological advances or further developments.
• Applications that use our products based on our technical recommendations are beyond our control and are solely the responsibility of the user.
• The user is not relieved of the obligation to carry out careful inspection and testing to verify the suitability of the incoming goods for the intended application.