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Trigonox® HMa is a methyl isobutyl ketone peroxide (MIBKP) formulation for curing unsaturated polyester resins as such or in the presence of a cobalt accelerator in the temperature range of 60-150°C.
Trigonox HMa is methyl isobutyl ketone peroxide (MIBKP, CAS 37206-20-5) from Nouryon for curing unsaturated polyester resins at 60–150 °C, with or without a cobalt accelerator. With a cobalt accelerator such as NL-49PN it gives a long gel time at ambient temperature followed by a fast cure at 60–100 °C, which suits filament winding and flat and corrugated sheet production.
Without cobalt, it cures at about 80–150 °C in flat and corrugated sheet where accelerator discoloration is not acceptable. In pultrusion it serves as a kicker together with a low-reactivity peroxide such as Trigonox C; the low-reactivity peroxide is needed for a complete cure. For more background, read our article on MIBKP in thermoset processing. See all grades in the organic peroxide range.
| Property | Value |
| Chemical name | Methyl isobutyl ketone peroxide (MIBKP) |
| CAS number | 37206-20-5 |
| EINECS / ELINCS | 253-396-4 |
| Appearance | Clear liquid, ≤ 50 Pt-Co |
| Total active oxygen | 10.0–10.3 % |
| Cure temperature range | 60–150 °C |
| SADT | 55 °C |
| Maximum storage temperature (Ts max) | 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 6 months after delivery when stored as recommended |
The Trigonox HMa 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.
- Filament winding: long ambient gel time and fast cure at 60–100 °C with a cobalt accelerator.
- Flat and corrugated sheet: cobalt-accelerated cure, or cobalt-free cure at 80–150 °C where discoloration is unacceptable.
- Pultrusion: kicker in combination with a low-reactivity peroxide such as Trigonox C.
Store Trigonox HMa below 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, and never mix it directly with a cobalt accelerator.
A: Trigonox HMa is Nouryon's methyl isobutyl ketone peroxide (MIBKP), CAS 37206-20-5. It cures unsaturated polyester resins at 60–150 °C, with or without a cobalt accelerator.
A: Yes. Without cobalt it cures at about 80–150 °C, which is useful for flat and corrugated sheet where accelerator discoloration is not acceptable.
A: It is used as a kicker together with a low-reactivity peroxide such as Trigonox C. The low-reactivity peroxide must be included to reach a complete cure.
A: Store it below 25 °C in closed original containers, away from heat, sunlight, reducing agents, acids, alkalis and metal compounds. Under these conditions it stays within specification for at least 6 months after delivery.
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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