For many sectors, from automotive coatings to advanced printing, UV curing technology offers unparalleled benefits in terms of speed, efficiency, and environmental compliance. At the core of this process is the photoinitiator, a chemical that triggers the rapid transformation of liquid resins into solid, durable materials. Among the most widely used and effective is Photoinitiator 1173 (CAS 7473-98-5). As a chemical supplier with a deep understanding of material science and industrial applications, we are committed to providing R&D scientists and procurement managers with the critical raw materials they need.

The Mechanism of UV Curing with Photoinitiator 1173

Photoinitiator 1173 belongs to the class of Type I photoinitiators, meaning it undergoes unimolecular fragmentation upon absorbing UV radiation to generate free radicals. This process can be broken down into a few key steps:

  1. UV Absorption: The molecule efficiently absorbs UV light within a specific wavelength range, becoming excited.
  2. Alpha-Cleavage: The excited molecule undergoes a bond cleavage, typically in the alpha position relative to the carbonyl group, producing two radical fragments.
  3. Initiation of Polymerization: These free radicals then attack the double bonds of monomer molecules (commonly acrylates or methacrylates) in the formulation, starting a chain reaction of polymerization.
  4. Crosslinking: As polymerization progresses, monomer units link together, and if the formulation contains multifunctional monomers, a highly crosslinked network is formed, resulting in a solid, cured film.

The efficiency of this process is highly dependent on the photoinitiator's absorbance spectrum, quantum yield, and the overall formulation. Photoinitiator 1173 is prized for its balanced properties, making it a cornerstone in many UV-curable systems.

Key Properties and Advantages

Researchers and product developers often select Photoinitiator 1173 for its:

  • High Reactivity: It provides fast curing speeds, enhancing manufacturing throughput.
  • Good Solubility: It readily dissolves in common UV-curable monomers and oligomers.
  • Low Yellowing: Crucial for applications requiring excellent color stability and transparency, such as clear coats for wood and plastics.
  • Versatility: It can be used alone or in combination with other photoinitiators and additives to tailor curing profiles.

Sourcing and Procurement Advice

For businesses looking to buy Photoinitiator 1173, especially in industrial quantities, engaging with a reliable chemical manufacturer in China is a sound strategy. We offer high-purity Photoinitiator 1173, ensuring that your research and production efforts are supported by consistent quality and dependable supply. When procuring this chemical, always verify CAS No. 7473-98-5 and inquire about the manufacturer's quality assurance processes and typical specifications like Assay (e.g., ≥99.0%).

By understanding the fundamental chemistry and the advantages offered by Photoinitiator 1173, you can make informed decisions to optimize your UV-curable products. Partner with us to access this vital chemical and elevate your formulation capabilities.