- Product Name: NOROX® 425 (tert-butyl isononanoate)
- CAS Number: 13122-18-4
- Purity: Technical-grade liquid, approximately 99% peroxide content
- Molecular Weight: 230.3 g/mol
- Appearance: Colorless liquid
- Main Component: Technical-grade tert-butyl isononanoate peroxide
- Application: Used as an initiator for the polymerization of monomers (such as ethylene and styrene)
- 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
- Critical temperature (SADT): approx. 60°C
- Refrigerated stability: Can be stored at temperatures below -25°C
- Reaction initiation temperature: approx. 80°C
- Recommended storage temperature: Below 30°C
- Shelf life: 3 months
- Compliant with e-G (EU Directives: RoHS 2002/95/EG, WEEE 2002/96/EG)
- Used as a curing agent for polyester resins; suitable for various resin types within a temperature range of 130–160°C.
- Usage: 1–2% of the resin supply.
- Shelf life: At room temperature, up to several months depending on the resin type.
- Sensitive to certain fillers, pigments, cobalt salts, and tertiary aromatic amines.
- Shelf life can be significantly extended by adding 0.1–0.3% of inhibitor BC 500.
- Curing is relatively slow in the 80–95°C range (“initiation” temperature), unless an exothermic reaction occurs (e.g., in a heated mold).
- Short curing times of 1–3 minutes are achievable only at temperatures above 120°C.
- The optimal temperature range for hot-press molding is 130–160°C.
- Primarily used for hot-press molding of sheet molding compounds (SMC) or bulk molding compounds (BMC), as well as impregnation and coil impregnation.
- 10 h/1 h/1 min (0.1 m / benzene): 100/119/160°C
- Standard packaging is 25 kg.
- The information and technical recommendations provided are based on internal testing of local raw materials and are intended to introduce the product and its applications.
- The information does not guarantee specific product performance or suitability, nor does it provide complete instructions for use.
- The information does not guarantee the product’s specific performance or shelf life characteristics, nor does it assume legal liability for intellectual property or other matters.
- We reserve the right to make any changes based on technical progress or further development.
- Product applications and usage based on technical recommendations are beyond our control and are the sole responsibility of the user.