Physikalische Eigenschaften
Halbwertzeit-Daten (Zerfallstemperatur / Starttemperatur)
Zerfallsprodukte: trimethylcyclohexanone, tert-butyl alcohol
Aliases & Synonyms
- Also written as
- 1,1-Di(tert-butylperoxy)-3,3,5-trimethylcyclohexane
- Other names
- 1,1-di-tert-butylperoxy-3,3,5-trimethylcyclohexane
- Also supplied under these brand names
- Trigonox 29 · Luperox 231
Brand names are trademarks of their respective owners and are referenced for identification purposes only. LAAP products are not manufactured or endorsed by these companies.
Überblick
CH335 ist ein bifunktionelles Ketonperoxid, das als Polymerisationsinitiator für EPS (expandierbares Polystyrol) in Suspensionsverfahren, als Vernetzungsmittel für LDPE, LLDPE und EVA und als Härtungsinitiator für Acrylharze dient. Seine 10-Stunden-Halbwertszeit von 85°C eignet sich für die EPS-Suspensionspolymerisation im Bereich von 110-130°C.
Technischer Auswahlleitfaden
Produktüberblick
1,1-Bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane (CH335, CAS 6731-36-8) is a bifunctional peroxyketal with an active oxygen content of 10.58% and a 10-hour half-life temperature of 85°C. Its two peroxide groups decompose at the same rate, so a single loading delivers twice the radical flux of a monofunctional initiator at the same molar dose.
Halbwertszeit- und Temperaturprofil
The half-life series — 0.1 h at 128℃, 1 h at 105℃, 10 h at 85℃ — sets the practical process window. Suspension polymerization of EPS is typically run 25-45°C above the 10-hour half-life, i.e. 110-130°C, which keeps the conversion curve steep without leaving residual initiator in the bead. Below 100°C the decomposition rate is too slow to finish a normal cycle; above 140°C the radical flux becomes too high and bead size distribution widens.
Auswahl innerhalb derselben Produktfamilie
Within the LAAP peroxyketal family, CH335 is the mid-temperature member: CH (CAS 3006-86-8) decomposes ~9°C higher, while TACH (CAS 15667-10-4) is nearly identical at 87°C. Choose CH335 when the process target is 110-130°C; step up to CH when you need a slower, more gradual decomposition to control heat release in thick-wall parts; step down to DBPB (CAS 2167-23-9, 98°C) when you need a faster cycle. Against DCP (CAS 80-43-3, 117°C) the practical difference is the byproducts: CH335 gives trimethylcyclohexanone and tert-butyl alcohol, both low-odour, whereas DCP gives acetophenone, which is the usual source of taste and odour complaints in food-contact and consumer rubber.
Qualität, REACH & Dokumentation
CH335 is supplied as a liquid or as a dispersion on an inert carrier; standard grades are ≥90% active with an active oxygen of 10.58%. Typical controls are appearance, active oxygen, and assay. A batch Certificate of Analysis (CoA), a REACH-compliant Safety Data Sheet (SDS) and a Technical Data Sheet (TDS) with the full half-life table are issued with every shipment.
Verpackung, MOQ & Lieferzeit
Standard packing is 20 kg polyethylene drums, with IBC and custom filling on request. Because SADT is 60°C and the recommended storage range is 0-25°C, cold-chain shipping applies to warm-climate destinations. Minimum order quantity starts at 25 kg, lead time is 7-14 days for stock grades, and quotations are returned within 24 hours.
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