Overview
Propylthioxanthone (PTX) is an organic compound belonging to the thioxanthone family, primarily utilized as a photoinitiator in UV-curing applications. Its ability to absorb UV light and generate free radicals makes it indispensable in industries requiring rapid polymerization, such as printing and coatings. First synthesized in the late 20th century, PTX gained prominence due to its efficiency and compatibility with various resins. It is particularly favored for its balance of reactivity and stability, ensuring consistent performance in formulations without premature curing.
Physical and Chemical Properties
PTX is a pale yellow crystalline powder with a molecular weight of 254.34 g/mol. It exhibits a melting point range of 80-85°C and is soluble in common organic solvents like acetone, ethanol, and toluene, though it remains insoluble in water. Key chemical properties include its strong absorption in the UV-A spectrum (320-390 nm) and low volatility, which minimizes evaporation during processing. Its photochemical efficiency stems from the thioxanthone core, which facilitates radical formation upon UV exposure, initiating polymerization in monomeric systems.
Main Applications
PTX is widely employed in UV-curable inks for packaging, labels, and 3D printing, where it ensures fast curing and high-resolution output. It is also a critical component in coatings for electronics and automotive parts, providing durability and gloss. In adhesives, PTX enables instant bonding under UV lamps, streamlining assembly processes. Additionally, it is used in photopolymer printing plates for flexographic printing, offering precise image reproduction and resistance to wear.
Safety and Storage
PTX requires careful handling due to potential skin and eye irritation. PPE such as gloves and goggles is mandatory during use. Ensure adequate ventilation to avoid inhalation of dust. Storage should be in tightly sealed containers, protected from light and moisture at temperatures below 25°C. Incompatible with strong oxidizers; keep away from heat sources to prevent decomposition.
B2B Procurement Guide
When sourcing PTX, prioritize suppliers with ISO certification and batch-specific COAs (Certificates of Analysis) to verify purity (≥98%). Bulk buyers should negotiate pricing for quantities above 100 kg, with prices typically ranging between $50-$100/kg. Consider regional logistics: PTX is commonly shipped in 25 kg fiber drums. Evaluate suppliers for compliance with REACH or other regional regulations, especially for exports to the EU or North America.
Related Manufacturers
- 主营：水杨羟肟酸、甲基三氯硅烷、甲基三甲氧基硅烷、司盘