Product Name: Trigonox 21S (tert-butyl peroxy-2-ethylhexanoate) Application: Trigonox 21S is a highly reactive peroxide suitable for use as an initial curing agent in extrusion molding processes and SMC/BMC applications. Trigonox 21S is the preferred curing agent for hot-press molding of unsaturated polyester resins in the temperature range of 120–160°C. CAS Number: 3006-82-4 EINECS/ELINCS Number: 221-110-7 TSCA Status: Listed Molecular Weight: 216.3 Active Oxygen Content: Peroxide 7.40% Specifications:

Active Oxygen: ≥ 7.17%
Purity: ≥ 97.0%
Color: ≤ 20 Pt-Co
Inorganic + Organic Hydrolyzable Chlorine: ≤ 100 mg/kg
TBHP: 500 mg/kg

Properties:

Appearance: Clear liquid
Density, 20°C: 0.900 g/cm³
Viscosity, 20°C: 4.3 mPa·s

Applications: Trigonox 21S can be used in the production of low-density polyethylene (LDPE) and is suitable for both tubular and autoclave processes. It is typically used in combination with other peroxides to broaden the polymerization temperature range.It can also be used for the polymerization of styrene in combination with other initiators such as tert-butyl perbenzoate (Trigonox C) or tert-butyl 2-ethylhexyl peroxydicarbonate (Trigonox 117).In thermosetting resin applications, it is used for medium- to high-temperature curing of unsaturated polyester resins. Half-life data: The half-life of Trigonox 21S in chlorobenzene is:

0.1 hour at 113°C
1 hour at 91°C
10 hours at 72°C

Thermal stability: The self-accelerating decomposition temperature (SADT) is 35°C, making it suitable for curing unsaturated polyester resins. Storage: The recommended maximum storage temperature is 10°C, and the minimum storage temperature is -30°C to prevent crystallization. Packaging and Shipping: Standard packaging is 30-liter HDPE drums containing 25 kg of peroxide product. Complies with international regulations; please contact a sales representative for other packaging quantities. Safety and Handling: Keep containers tightly closed. Store and handle Trigonox 21S in a dry, well-ventilated area, away from heat and ignition sources, and avoid direct sunlight.Please avoid weighing and repackaging the product in the storage room. Avoid contact with reducing agents, acids, alkalis, and heavy metal compounds. The Safety Data Sheet (SDS) provides detailed information on safe storage, use, and handling. Major decomposition products: Carbon dioxide, tert-butanol, heptane, etc. Disclaimer: All information and recommendations are provided in good faith; however, the manufacturer makes no warranty regarding the accuracy of the information or the suitability of the product. Users must conduct their own tests to determine suitability. The manufacturer assumes no liability for any issues arising from the use of or reliance on this information.

Nouryon Trigonox 21S tert-butyl peroxy-2-ethylhexanoate 3006-82-4

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