Product Information:

• Product Name: NOROX? 425 PR (tert-Butyl peroxy-3,5,5-trimethylhexanoate)
• CAS No.: 13122-18-4
• Content: about 90%
• Molecular mass: not provided
• Appearance: colorless liquid
• Main ingredient: tert-Butyl peroxy-3,5,5-trimethylhexanoate
• Applications: Used as an initiator in combination with cobalt catalysts for curing unsaturated polyester resins at elevated temperatures (60-120°C), especially for vinyl ester resins with long gel times at room temperature.

Technical data:

• Peroxide content: approx. 90% w/w
• Active Oxygen: approx. 6.30% w/w
• Desensitizer: None
• Density (20°C): approx. 0.90 g/cm3
• Viscosity (20°C): approx. 5.0 mPa-s
• Refractive index (20°C): approx. 1.431
• SADT (critical temperature): above 55°C
• Refrigeration stability: can be stored below -25°C
• Recommended storage temperature: up to +25°C
• Storage stability (from date of delivery): 6 months

Applications:

• Used as a curing agent for polyester resins, suitable for all resin types, temperature range 80-160°C.
• Usage: 1-2% as supplied.
• "Shelf life" (gel time of resin + peroxide, excluding catalyst) can be up to several weeks at room temperature, depending on resin type.
• Sensitive to certain fillers and pigments as well as cobalt salts and tertiary aromatic amines.
• Shelf life can be significantly extended by adding inhibitors (BHT, p-phenylenedione) of 0.1-0.31 TP3T.
• Used for hot compression molding of unsaturated polyester resins and other molding processes.

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.