Photoinitiators
Photoinitiator DETX
2,4-Diethylthioxanthone
The diethyl thioxanthone — broader absorption and lower melting than ITX.
Product Description
DETX is a 2,4-diethyl-substituted thioxanthone Type II photoinitiator. The ethyl groups improve solubility in acrylate monomers versus ITX and broaden absorption slightly toward the visible edge, strengthening performance on 395–405 nm LED arrays.
Like ITX it operates through triplet-state hydrogen abstraction from amine synergists such as EDB or EHA, delivering fast surface cure in dense pigmented films. Typical use: 0.5–2 wt% with 1:0.5–1:1 amine ratio.
Key Features
- Better solubility than ITX in common monomers
- Excellent 385–405 nm LED response
- Fast surface cure through dense pigments
- Works with EDB/EHA amine synergists
Applications
- Dark UV offset and screen inks
- UV LED ink systems
- Pigmented coatings
- Photopolymer plate making
- Synergist packages with TPO/819
Specifications
| CAS No. | 82799-44-8 |
|---|---|
| Molecular Formula | C17H16OS |
| Molecular Weight | 268.38 |
| Appearance | Pale yellow powder |
| Assay (HPLC) | ≥ 98.0% |
| Loss on Drying | ≤ 0.5% |
Packaging & Storage
25 kg fiber drum with PE liner. Store cool, dry and protected from light; shelf life 24 months in original sealed packaging.
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