Product Information:

• Product Name: NOROX? 425 (tert-Butyl peroxy-3,5,5-trimethylhexanoate)
• CAS No.: 13122-18-4
• Content: technically pure liquid with a peroxide content of approximately 99%
• Molecular mass: 230.3 g/mol
• Appearance: colorless liquid
• Main ingredient: technically pure tert-butyl peroxide of isononanoic acid
• Applications: used as initiator for polymerization of monomers (e.g. ethylene, styrene)

Technical data:

• Appearance: colorless liquid
• Peroxide content: approx. 99% w/w
• Active Oxygen: approx. 6.88% w/w
• Desensitizer: None
• Density (20°C): approx. 0.89 g/cm3
• Viscosity (20°C): approx. 5.0 mPa-s
• Refractive index (20°C): approx. 1.431
• Solubility: insoluble in water, soluble in alcohols and phthalates
• SADT: approx. 60°C
• Refrigeration stability: can be stored below -25°C
• Starting reaction temperature: approx. 80°C
• Recommended storage temperature: below 30°C
• Activity maintenance time: 3 months
• Complies with E-G (EU Directives: RoHS 2002/95/EG, WEEE 2002/96/EG)

Applications:

• Used as a curing agent for polyester resins in a wide range of resin types with a temperature range of 130-160°C.
• Dosage: 1-2% as supplied.
• Shelf life: several months at room temperature, depending on resin type.
• Sensitive to certain fillers, pigments, cobalt salts and tertiary aromatic amines.
• Shelf life can be significantly extended with the addition of the 0.1-0.31 TP3T inhibitor BC 500.

Curing Characteristics:

• Curing in the range of 80-95°C ("starting" temperature) is slow unless there is an exothermic reaction (e.g., in an insulated mold).
• Short curing times of 1-3 minutes can only be achieved above 120°C.
• The optimal temperature range for thermocompression molding is 130-160°C.

Treatment:

• It is mainly used for sheet molding (SMC) or block molding (BMC) thermocompression molding, as well as impregnation and coil impregnation.

Half-life data:

• 10h/1h/1min (0.1 m/benzene): 100/119/160°C

Packaging:

• Standard packaging is 25 kg.

Disclaimer:

• The information and technical advice provided is based on in-house testing of local raw materials and is used to present products and applications.
• The information does not provide a warranty as to the specific performance or suitability of the product, nor does it provide complete instructions for use.
• The information does not guarantee the product and shelf-life characteristics, nor does it assume legal responsibility for intellectual property rights, etc.
• The right is reserved to make any changes based on technological advances or further developments.
• The application and use of products based on technical advice is beyond our control and is entirely the responsibility of the user.