Trigonox 42S overview
Trigonox 42S is tert-butyl peroxy-3,5,5-trimethylhexanoate (TBPIN, CAS 13122-18-4) from Nouryon, a liquid perester with an assay of at least 97 %. It is an efficient initiator for high-pressure ethylene polymerization (LDPE) in autoclave and tubular reactors at 210–240 °C, where it is often combined with other peroxides to cover a wider temperature range. Other LDPE initiators in our range include
Trigonox B and Trigonox C.
It is also used for (co)polymerization of acrylates and methacrylates, at 90–175 °C in solution processes including coatings resins and at 90–130 °C in bulk and suspension, and for styrene (co)polymerization at 90–140 °C. For more background, read our article on the properties and applications of TBPIN. See all grades in the organic peroxide range.
Trigonox 42S key data
| Property | Value |
| Chemical name | tert-Butyl peroxy-3,5,5-trimethylhexanoate (TBPIN) |
| CAS number | 13122-18-4 |
| EINECS / ELINCS | 236-050-7 |
| Appearance | Clear liquid, ≤ 50 Pt-Co |
| Assay | ≥ 97.0 % |
| Active oxygen (specification) | 6.74 % |
| Theoretical active oxygen (pure compound) | 6.95 % |
| Density / viscosity, 20 °C | 0.900 g/cm³ / 5 mPa·s |
| Half-life temperature, 10 h / 1 h / 0.1 h (chlorobenzene) | 94 °C / 114 °C / 135 °C |
| Activation energy | 140.78 kJ/mol |
| SADT | 55 °C |
| Storage temperature (Ts min – Ts max) | −20 to 25 °C |
| Transport classification | Organic peroxide type D, liquid; Division 5.2; UN 3105 |
| Standard packaging | 30 L HDPE can, 25 kg net |
| Shelf life | At least 3 months after delivery when stored as recommended |
Trigonox 42S TDS & SDS download
The Trigonox 42S product data sheet (TDS/PDS) lists specifications, thermal stability data and storage limits. The safety data sheet (SDS/MSDS) covers hazard classification, transport and emergency measures. English documents can be downloaded below; Chinese versions are available on request.
Applications
-LDPE: high-pressure ethylene polymerization in autoclave and tubular reactors at 210–240 °C, often in combination with other peroxides.
-Solution acrylics and coatings resins: (co)polymerization of acrylates and methacrylates at 90–175 °C.
-Bulk and suspension acrylics: (co)polymerization of acrylates and methacrylates at 90–130 °C.
-Polystyrene: styrene (co)polymerization at 90–140 °C.
Storage and handling
Store Trigonox 42S between −20 °C and 25 °C in tightly closed original containers, in a dry, well-ventilated area away from heat, ignition sources and direct sunlight. Keep it away from reducing agents such as amines, acids, alkalis and heavy metal compounds. Its SADT is 55 °C.
Trigonox 42S FAQ
Q: What is Trigonox 42S?
A: Trigonox 42S is Nouryon's tert-butyl peroxy-3,5,5-trimethylhexanoate (TBPIN), CAS 13122-18-4. It initiates high-pressure LDPE polymerization and the polymerization of acrylates, methacrylates and styrene.
Q: What is the half-life temperature of Trigonox 42S?
A: Measured in chlorobenzene, its 10-hour half-life temperature is 94 °C, its 1-hour half-life temperature is 114 °C and its 0.1-hour half-life temperature is 135 °C.
Q: At what temperature is Trigonox 42S used in LDPE?
A: In high-pressure ethylene polymerization it is used at 210–240 °C, depending on reaction conditions, and is often combined with other peroxides.
Q: How should Trigonox 42S be stored?
A: Store it between −20 °C and 25 °C in closed original containers, away from heat, ignition sources, reducing agents, acids, alkalis and heavy metal compounds. Under these conditions it stays within specification for at least 3 months after delivery.
Q: Where can I get the Trigonox 42S TDS and SDS?
A: The English product data sheet and safety data sheet can be downloaded on this page. Send an inquiry for Chinese versions.
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