![Photoinitiator 907 (2-Methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1-one)](/assets/images/product-pi-907.jpg)
Photoinitiators
Photoinitiator 907
2-Methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1-one
Deep-cure α-amino ketone for heavily pigmented UV inks and electronics coatings.
Product Description
Photoinitiator 907 is an α-amino ketone Type II initiator whose long-wavelength absorption and high initiating efficiency make it a classic choice for heavily pigmented systems. Its benzyl-type radical chemistry delivers pronounced through-cure where surface-only initiators leave under-cured films, particularly in dark UV inks and thick solder-mask coatings.
907 is widely paired with thioxanthones such as ITX to balance surface and depth cure, and its morpholine functionality contributes strong adhesion on copper, glass and rigid plastics. Typical loadings are 2–4 wt% alone or 1–2 wt% in combination packages.
Key Features
- Pronounced through-cure in dark and heavily pigmented inks
- Strong adhesion contribution on copper, glass and plastics
- Proven in PCB solder-mask formulations for decades
- Low volatility powder, easy to handle and meter
Applications
- Dark-colored UV offset and screen inks
- PCB solder masks and etch resists
- Pigmented wood and plastic coatings
- UV adhesives requiring through-cure
- Combination packages with ITX
Specifications
| CAS No. | 71868-10-5 |
|---|---|
| Molecular Formula | C15H21NO2S |
| Molecular Weight | 279.40 |
| Appearance | Off-white to pale yellow powder |
| Assay (HPLC) | ≥ 99.0% |
| Melting Point | 74 – 76 °C |
| Loss on Drying | ≤ 0.5% |
Packaging & Storage
25 kg fiber drum with PE liner, 1 kg aluminum-foil sample bag. Store cool, dry and protected from light; shelf life 24 months in original sealed packaging.
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