Photoinitiator 369 (Irgacure 369) for UV Ink
CAS Number: 119313-12-1
2-Benzyl-2-(dimethylamino)-1-(4-morpholinophenyl)butan-1-one (PI-369, Irgacure 369) is a highly efficient alpha-aminoketone Type I photoinitiator widely used in UV offset, screen, and digital inks due to its excellent surface cure, strong absorption at 320–380 nm, and low tendency to migrate or extract into food substrates when fully cured. It is particularly effective in dark and pigmented UV inks where it outperforms alpha-hydroxyketone initiators.
Technical Specifications
| appearance | Yellow to orange powder or granules |
| purity (%) | ≥98 |
| moisture (%) | ≤0.5 |
| absorption max (nm) | 320, 369 |
| melting point (°C) | 108–112 |
Applications
- UV offset inks for commercial printing
- UV screen-printing inks on plastics and metals
- UV digital inkjet inks in pigmented CMYK systems
- UV flexo inks on non-absorbent substrates
- UV varnishes for packaging with low migration requirements
Key Features
- Outstanding surface cure for high-speed UV offset printing
- Strong absorption at 369 nm for efficient mercury-lamp utilization
- Low migration after full cure for food-adjacent packaging compliance
- Effective in dark, black, and pigment-dense UV ink formulations
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CAS Number
119313-12-1
Category
Printing Ink ChemicalsAvailability
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