BASF IRGACURE 651 is a Type I free-radical UV photoinitiator in the IRGACURE series, 2,2-dimethoxy-2-phenylacetophenone, white crystalline powder, high thermal stability, ideal for UV inks/varnishes/unsaturated polyester/styrene systems, compoundable with IRG 184/369 for enhanced curing efficiency, suitable for imaging/electronic applications.
Efficient UV initiation - Rapid free-radical generation under UV, suitable for colored systems, improving curing speed and through-cure
Good thermal stability - Thermally stable, easy-to-disperse powder, suitable for various film thicknesses
Excellent compounding synergy - Compatible with most monomers/oligomers, compoundable for enhanced surface curing
Good solubility - Suitable for most organic solvents/acrylate monomers, applicable to various viscosity systems
Imaging/electronic compatibility - Suitable for photoresists/solder masks, ensuring fine-pattern curing, improving resolution
UV-curable inks - Offset/screen inks, improving curing speed and surface curing, ideal for thin coats
UV varnish systems - Clear varnishes, ensuring transparency and long-term weatherability, suitable for outdoor scenarios
Unsaturated polyester systems - Topcoats/fillers on wood/wood substitutes, based on unsaturated polyester/styrene
Photoresists - Ensuring imaging precision, suitable for printing plates/UV-curable resins
Electronic solder masks - PCB solder masks, suitable for fine-pattern curing, improving adhesion/chemical resistance
| Brand | BASF |
| Chemical Type | Type I free-radical UV photoinitiator (benzoin dimethyl ketal) |
| Chemical Name | 2,2-dimethoxy-2-phenylacetophenone |
| CAS No | 24650-42-8 |
| Appearance (25℃) | White crystalline powder |
| Molecular Weight | 256.3 g/mol |
| Melting Point | 64-67℃ |
| Density (20℃) | 1.13g/cm³ |
| Flash Point | 169.6℃ |
| Absorption Peaks | 250nm, 340nm (in methanol) |
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