Photoinitiators
Photoinitiator EDB
Ethyl 4-(dimethylamino)benzoate
The proven amine synergist that unlocks full cure speed of ITX and benzophenone systems.
Product Description
EDB is a tertiary amine synergist that donates hydrogen to excited Type II photoinitiators such as ITX and benzophenone, converting their absorbed UV energy into initiating radicals. Without an amine synergist, these systems cure slowly; with EDB, surface cure in dark inks reaches commercial line speeds.
Beyond Type II chemistry, small amounts of EDB also counteract oxygen inhibition in Type I systems, improving surface drying of clear coats. Typical ratios are 1 : 0.5 to 1 : 1 with ITX at combined loadings of 1–4 wt%.
Aolong EDB is vacuum-distilled to ≥99.0% purity with very low color, preventing yellowing drift in white and light-tone inks over storage.
Key Features
- Essential synergist for ITX and benzophenone systems
- Accelerates surface cure, reduces oxygen inhibition
- Low color — safe for white and light-tone inks
- Liquid form for simple cold dosing
Applications
- Dark-colored UV offset and flexo inks
- Screen inks for packaging and containers
- Surface-cure booster in clear UV coatings
- Photopolymer printing plates
- UV LED ink formulations with ITX
Specifications
| CAS No. | 10287-53-3 |
|---|---|
| Molecular Formula | C11H15NO2 |
| Molecular Weight | 193.25 |
| Appearance | Colorless to pale yellow liquid |
| Assay (GC) | ≥ 99.0% |
| Color (APHA) | ≤ 100 |
| Water Content (KF) | ≤ 0.2% |
Packaging & Storage
25 kg HDPE pail, 200 kg steel drum or 1 kg aluminum-foil bottle. Store cool and dry; shelf life 24 months in original sealed packaging.
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