HY-606-1 is a highly effective monovalent salt environmental protection fungicide, which has a wide range of inhibition effect on various bacteria, yeast and other microorganisms, and is widely used in various water-based coatings, polymer emulsions, daily chemicals, cosmetics, cleaning agents and other fields.
Diazonium salt photoinitiator
After the diazonium salt absorbs light, it decomposes in the excited state to produce fluorobenzene, polyfluoride and nitrogen. Among them, the polyfluoride is a strong Lewis acid, which can directly initiate cationic polymerization or indirectly generate super protic acid, which then initiates cationic polymerization, micronized carnauba wax photochemistry The reaction process is as formula (7-16).
The main defect of diazonium salt as a cationic photoinitiator is its poor thermal stability. In addition, the photoreaction produces nitrogen, which easily forms pinholes or bubbles in the coating, which affects the quality of the coating. Therefore, the diazonium salt is not very good. Cationic photoinitiator.
Iodine salt photoinitiator
Diaryl iodonium salt is more convenient to synthesize. It can be prepared from alkylbenzene under the action of potassium iodate/sulfuric acid/acetic anhydride . It has good thermal stability and high photoreactivity, which is a relatively important category. The cationic photoinitiator has been commercialized by GE in the United States. The extinction coefficient of diaryliodonium salt at the maximum absorption wavelength can be as high as 10°, but the absorption wavelength is generally short, most of the maximum absorption wavelength is below 300nm, and the utilization rate of commonly used ultraviolet light sources is low. The various substituents introduced on the ring have no significant effect on the attractiveness of Jinbing. When the iodonium salt is attached to the aromatic ketone group with strong light absorption, the absorption wavelength of the obtained iodonium salt can be increased to more than 300nm. With long absorption wavelengths, they are not ideal in terms of solubility.
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