BASF IRGACURE 250 is a cationic UV photoinitiator in the IRGACURE series (75% propylene carbonate solution), ideal for epoxy systems, suitable for thick films/dark systems, compoundable with thioxanthones/α-hydroxy ketones, ensuring curing efficiency/low yellowing, suitable for inks/paints/adhesives/imaging applications.
Efficient cationic initiation - Rapid polymerization under UV, suitable for thick films/dark systems, improving through-cure
Low yellowing/weatherability - Minimal yellowing under heavy UV exposure, suitable for outdoor varnishes, extending coating life
Excellent compounding synergy - Compoundable with photosensitizers/α-hydroxy ketones, improving surface curing speed/efficiency
High-opacity compatibility - Low dosage achieves excellent curing in white/colored paints, reducing formulation costs
Thick-film compatibility - Compoundable with photosensitizers, suitable for thick-film curing, ensuring uniform through-cur
Printing inks - Flexo/screen inks, improving curing speed/surface curing, ideal for high-opacity systems
White/dark coatings - White/colored paints with rutile/titanium dioxide, ensuring curing efficiency/low yellowing
Adhesives - UV-curable adhesives, improving bond strength/chemical resistance, suitable for various substrates
Graphic arts imaging - Printing plates/photoresists, ensuring imaging precision/resolution
Outdoor UV varnishes - Compoundable with UV absorbers, for outdoor wood/metal varnishes, anti-aging
| Chemical Name | Triarylsulfonium hexafluoroantimonate mixture |
| CAS No | 71449-78-0 (mixture) |
| Appearance (25℃) | Pale yellow transparent liquid |
| Active Content | 75% (propylene carbonate solution) |
| Molecular Weight | Approx. 500 (mixture) |
| Density (20℃) | 1.25g/cm³ |
| Flash Point | >90℃ |
| Absorption Peaks | 230nm, 260nm, 300nm (in methanol) |
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