Photoinitiator 784: A Versatile and Efficient Solution for UV-Curable Coatings and Inks

UV-curable coatings and inks have become increasingly popular in various industries due to their fast curing time, high durability, and low VOC emissions. However, to initiate the curing process, a photoinitiator is needed, which absorbs UV light and generates reactive species that trigger the polymerization of monomers or oligomers. Among the numerous photoinitiators available in the market, Photoinitiator 784 (PI-784) stands out for its versatility and efficiency.

PI-784 is a Type II photoinitiator, meaning that it undergoes a photoinduced electron transfer (PET) process upon UV irradiation, where the excited state of the chromophore transfers an electron to the co-initiator or monomer, leading to the formation of radical species. PI-784 has a broad absorption spectrum ranging from 290 to 450 nm, with the maximum peak at 354 nm, which matches well with the output of medium-pressure mercury lamps commonly used in UV curing systems.

PI-784 has several advantages over other photoinitiators. Firstly, it has a high molar extinction coefficient, which means that a small amount of PI-784 can absorb a large amount of UV light and initiate the polymerization efficiently. Secondly, it has a low volatility and odor, which makes it suitable for use in food packaging, medical devices, and other sensitive applications. Thirdly, it has excellent compatibility with various monomers and oligomers, such as acrylates, methacrylates, epoxies, and vinyl ethers, allowing for the formulation of customized coatings and inks with desired properties.

PI-784 is also compatible with other co-initiators or synergists, such as amines, phosphines, and thioxanthones, which can enhance the efficiency and selectivity of the PET process. One example is Photoinitiator FMT (PI-FMT), which is a blend of PI-784 and bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide (TPO). PI-FMT has a higher reactivity and lower yellowing tendency than PI-784 alone, making it suitable for clear and colorless coatings and inks that require high gloss and hardness.

Another example is Bis-2,6-difluoro-3-pyrrolephenyl titanocene (BDPT), which is a metal-based photoinitiator that can replace PI-784 in some applications. BDPT has a similar absorption spectrum to PI-784 but has a longer excited-state lifetime and a stronger reducing power, leading to a more efficient PET process. BDPT also has a lower toxicity and eco-toxicity than some other metal-based photoinitiators, such as Irgacure 819 or Darocur TPO, making it a more sustainable choice.

INNO SPECIALTY CHEMICALS is a leading manufacturer and supplier of PI-784 and its derivatives, including PI-FMT and BDPT. INNO has a state-of-the-art production facility and a team of experienced scientists and engineers who can provide technical support and customized solutions to meet the specific needs of customers. INNO's products have been widely used in various industries, such as automotive, electronics, coatings, and inks, and have received positive feedback from customers worldwide.

In conclusion, PI-784 is a versatile and efficient photoinitiator that can initiate the polymerization of various monomers and oligomers under UV light. PI-784 has a high molar extinction coefficient, low volatility and odor, and excellent compatibility with other components, making it a popular choice in UV-curable coatings and inks. PI-FMT and BDPT are two examples of PI-784 derivatives that can further enhance the performance and sustainability of UV-curable formulations. INNO SPECIALTY CHEMICALS is a reliable supplier of PI-784 and its derivatives, and can provide tailored solutions to customers' requirements.

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