Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

BASF IRGACURE 250 Photoinitiator

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.

Features Of BASF IRGACURE 250 Photoinitiator

  1. Efficient cationic initiation - Rapid polymerization under UV, suitable for thick films/dark systems, improving through-cure

  2. Low yellowing/weatherability - Minimal yellowing under heavy UV exposure, suitable for outdoor varnishes, extending coating life

  3. Excellent compounding synergy - Compoundable with photosensitizers/α-hydroxy ketones, improving surface curing speed/efficiency

  4. High-opacity compatibility - Low dosage achieves excellent curing in white/colored paints, reducing formulation costs

  5. Thick-film compatibility - Compoundable with photosensitizers, suitable for thick-film curing, ensuring uniform through-cur

Typical Applications Of BASF IRGACURE 250 Photoinitiator

  1. Printing inks - Flexo/screen inks, improving curing speed/surface curing, ideal for high-opacity systems

  2. White/dark coatings - White/colored paints with rutile/titanium dioxide, ensuring curing efficiency/low yellowing

  3. Adhesives - UV-curable adhesives, improving bond strength/chemical resistance, suitable for various substrates

  4. Graphic arts imaging - Printing plates/photoresists, ensuring imaging precision/resolution

  5. Outdoor UV varnishes - Compoundable with UV absorbers, for outdoor wood/metal varnishes, anti-aging

Specifications Of BASF IRGACURE 250 Photoinitiator

Chemical NameTriarylsulfonium hexafluoroantimonate mixture
CAS No71449-78-0 (mixture)
Appearance (25℃)Pale yellow transparent liquid
Active Content75% (propylene carbonate solution)
Molecular WeightApprox. 500 (mixture)
Density (20℃)1.25g/cm³
Flash Point>90℃
Absorption Peaks230nm, 260nm, 300nm (in methanol)


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