Photoinitiators
Photoinitiator PAG-001
Diphenyl(4-phenylthio)phenylsulfonium hexafluorophosphate
Triarylsulfonium PF6 photoacid generator for cationic epoxy curing.
Product Description
PAG-001 is the long-wavelength triarylsulfonium salt whose 4-phenylthio substituent extends absorption to 300–350 nm with strong molar absorptivity. Under UV it liberates hexafluorophosphoric acid, initiating cationic polymerization of epoxides, vinyl ethers and oxetolanes.
Cationic curing brings a 'dark cure' advantage — polymerization continues after exposure — plus near-zero shrinkage and excellent adhesion. Typical loadings are 1–3 wt% in cationic formulations and photoresist systems.
Key Features
- Long-wavelength sulfonium chromophore with strong absorption
- Generates superacid for epoxy / vinyl ether cationic cure
- Dark-cure continuation after exposure
- Thermally stable, non-volatile solid
Applications
- Cationic UV epoxy coatings and inks
- UV adhesives with dark cure
- Photoresists and electronics packaging
- Stereolithography cationic resins
- Vinyl ether systems
Specifications
| CAS No. | 61856-13-8 |
|---|---|
| Molecular Formula | C24H19F6PS2 |
| Molecular Weight | 516.51 |
| Appearance | White crystalline 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.
Related Products
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Photoinitiator 6992
Diphenyl(4-phenylthio)phenylsulfonium PF6 solution in propylene carbonate
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