涂料工业：
一、术语和定义 光引发剂（photoinitiator），根据GB/T 41764-2022《辐射固化涂料中光引发剂含量的测定 气相色谱-质谱法》中3.1描述为：一种能吸收辐射能，并通过激发发生化学变化，生成具有引发聚合能力的活性中间体（自由基或阳离子）的物质。
二、相关标准 GB/T 41764-2022 《辐射固化涂料中光引发剂含量的测定 气相色谱-质谱法》 HG/T 5778-2020 《化妆品包装材料用紫外光固化涂料》 SN/T 4317-2015 《出口食品中 7 种光引发剂迁移量的检测 液相色谱-质谱法/质谱法》。
IV、The mechanism and classification of photoinitiators in the direct or indirect absorption of light energy, the initiator molecules from the base state jumped to the excited single-linear state, through the inter-systems scurry jump to the excited three-linear state. In the excited unilinear state or trilinear state after a single molecule or bimolecular chemical action, the production of monomer polymerisation can be triggered by the active fragments (free radicals, cations, anions, etc.), thus triggering monomer polymerisation crosslinking curing. There are many types of photoinitiators. According to the different triggering mechanisms, photoinitiators can be divided into cationic photoinitiators and free radical photoinitiators, of which free radical photoinitiators have the widest range of applications.
4.几种主流光引发剂及其应用领域
907 and ITX or DETX photoinitiators used in conjunction with the coloured system, the main application areas for home decoration, etc.; 1173 and TPO with better curing effect, the main application areas for furniture and wood varnish, floor coatings, home decorations, The main application areas are: furniture wood varnish, floor coating, 3C electronic coating, automobile interior, home decoration, plastic products, etc. 184 can be used with TPO and other low-yellowing photoinitiators in the white system, mainly used in: furniture wood varnish, floor coating, 3C electronic coating, automobile interior, home decoration, plastic products, etc.
1. 184
最大吸收波长为 333 nm，主要用于启动丙烯酸酯和甲基丙烯酸酯体系的快速固化，参考用量为 2% 至 4%，固化时间分别为 190 s 和 140 s。
别名：1-羟基环己基苯基甲酮
英文名称：1-羟基环己基苯基甲酮
化学文摘社编号：947-19-3
外观白色或类白色晶体
透射率：425纳米≥98.0%，500纳米≥99.0%（1克/10毫升甲苯）
吸收峰：246 纳米、280 纳米、333 纳米（甲醇溶液中）
溶解度：20℃（克/100 克溶液）
2. 907
907 可以在油墨固化过程中，吸收紫外线辐射能量而形成自由基或阳离子，引发单体和低聚物的聚合、交联和接枝反应，在极短的时间内使油墨固化成具有三维网状结构的聚合物。
别名：2-甲基-1-(4-甲硫基苯基)-2-吗啉基-1-丙酮
化学文摘社编号：71868-10-5
外观白色结晶粉末
透射率：425纳米≥90.0%，500纳米≥95.0%（1克/10毫升甲苯）
吸收峰：230 纳米、304 纳米（甲醇溶液中）
溶解度：20℃（克/100 克溶液）
五、光引发剂的发展趋势 光引发剂除了要满足环保等要求外，一些标准（如食品级涂料）对光引发剂的残留量有严格限制，在性能方面需要具有摩尔消光系数高、毒性低、溶解性好等特点，并与光源的光谱相匹配。
With the improvement of public safety awareness, the safety of food and drug packaging is more and more important, such as Europe on food and drug packaging ink developed strict. Globally, macromolecule photoinitiators will be more and more used in packaging inks due to their advantages of low toxicity and low migration, so the development of more types of macromolecule photoinitiators is the development trend of the industry’s products.
阳离子光引发剂与配套树脂和单体组成的配方产品具有抗氧化和阻聚、体系收缩率低等优点，可与自由基固化体系形成互补。阳离子固化产品的未来应用或与自由基固化产品的混合使用都具有发展前景，因此阳离子光引发剂也是产品和技术的发展方向之一。