UV curing technology has transformed numerous industries by offering a fast, energy-efficient, and environmentally friendly method for hardening coatings, inks, and adhesives. At the heart of this technology is the photoinitiator, a chemical compound that absorbs UV light and triggers the polymerization process. NINGBO INNO PHARMCHEM CO.,LTD. delves into the scientific principles behind the efficacy of Photoinitiator 1173 (CAS 7473-98-5), also known as 2-Hydroxy-2-methylpropiophenone.

Photoinitiator 1173 is classified as a Type I photoinitiator. This classification is based on its mechanism of action: upon absorption of UV radiation, the molecule undergoes a direct fragmentation, typically via a Norrish Type I cleavage. This process involves the breaking of a carbon-carbon bond adjacent to the carbonyl group, resulting in the formation of two highly reactive free radicals. For Photoinitiator 1173, this typically yields a benzoyl radical and an alpha-hydroxyalkyl radical. These free radicals are the primary initiators of the polymerization chain reaction.

The generated free radicals then attack the unsaturated bonds (typically acrylate or methacrylate groups) present in the monomers and oligomers within the formulation. This attack initiates a chain reaction where monomers add sequentially to the growing polymer chain, rapidly building molecular weight and transforming the liquid formulation into a solid polymer network. The efficiency of this radical generation and subsequent chain propagation is what dictates the speed and completeness of the UV curing process.

A key advantage of Photoinitiator 1173's mechanism is its high quantum yield for radical generation, meaning a single absorbed photon can lead to the formation of multiple initiating radicals. This contributes to its reputation as a highly efficient photoinitiator. Furthermore, the absorption spectrum of Photoinitiator 1173 is well-matched to the emission wavelengths of common UV lamps, ensuring efficient energy transfer. When considering the benefits of Photoinitiator 1173, its efficient chemical mechanism is central.

The resulting polymer network formed through this radical polymerization process exhibits desirable properties such as high hardness, excellent chemical resistance, and good adhesion to various substrates. The non-yellowing nature of the cured film, a characteristic often attributed to the stable nature of the radicals formed and their minimal side reactions, further enhances its appeal across diverse applications like clear coatings and printing inks.

NINGBO INNO PHARMCHEM CO.,LTD. provides high-purity Photoinitiator 1173, ensuring that its chemical mechanism operates optimally in your UV curing systems. Understanding the science behind this vital component allows formulators to better leverage its capabilities, leading to improved product performance and manufacturing efficiency. For those seeking to buy Photoinitiator 1173, we offer the quality and consistency required for advanced UV curing applications.