光引发剂：自由基型和阳离子型的适用范围 -利来国际w66

光引发剂，又称光敏剂或光固化剂，通常用于光固化体系中，包括uv胶，uv涂料，uv油墨等，是一类能在紫外光区(250～420nm)或可见光区(400～800nm)吸收一定波长的能量，产生自由基、阳离子等，从而引发单体聚合交联固化的化合物。

photoinitiators, also known as photosensitizers or photocuring agents, are commonly used in photocuring systems, such as uv adhesives, uv coatings, uv inks, etc. they absorb a certain wavelength of energy in the ultraviolet light region (250-420nm) or visible light region (400-800nm), which can generate free radicals, cations and some others, thereby initiating polymerization, crosslinking and curing of monomers. 

南通新纳希新材料有限公司多年从事光引发剂等产品业务，质量稳定，价格极有竞争力，现已销往海内外许多国家。

nantong synasia new material co., ltd. has many years of experience in photoinitiators and other products. due to stable quality and extremely competitive price, our products have been sold to numerous countries at home and abroad.

自由基型光引发剂 / free-radical photoinitiator

按光引发剂产生活性自由基的作用机理不同，自由基型光引发剂主要分为以下两类：

depending on their reaction, free-radical photoinitiators are mainly divided into the following two categories:

• 裂解型自由基型光引发剂

  (norrish type i photoinitiator)

• 夺氢型光引发剂

  (norrish type ii photoinitiator)

裂解型自由基光引发剂多以芳基烷基酮衍生物为主，比较有代表性的包括苯偶姻衍生物、苯偶酰缩酮衍生物、二烷氧基苯乙酮、α－羟烷基苯酮、α－胺烷基苯酮、酰基膦氢化物、酯化肟酮化合物、芳基过氧酯化合物、卤代甲基芳酮、有机含硫化合物、苯甲酰甲酸酯等。

norrish type i photoinitiators, also called cleavage-type free radical photoinitiators, are mostly aryl alkyl ketone derivatives. representative ones include benzoin derivatives, benzil ketal derivatives, dialkoxy acetophenone, α-hydroxyl alkyl phenone, α-aminoalkyl phenone, acyl phosphine hydride, esterified oxime ketone compound, aryl peroxy ester compound, halogenated methyl aryl ketone, organic sulfur compound, benzoyl formate, etc.

夺氢型光引发剂一般以芳香酮结构为主，还包括某些稠环芳烃，它们具有一定吸光性能，而与之匹配的助引发剂，即氢供体，本身在常用长波紫外光范围内无吸收。夺氢型光引发剂吸收光能，在激发态与助引发剂发生双分子作用，产生活性自由基。

norrish type ii photoinitiators, also called hydrogen abstraction type photoinitiators, are generally based on aromatic ketone structures, and also include certain fused-ring aromatic hydrocarbons, which have certain light absorption properties, and the matching co-initiator, namely hydrogen donor, itself is not absorpted in the range of commonly used long-wave ultraviolet light. the hydrogen abstraction type photoinitiator absorbs light energy and has bimolecular interaction with the co-initiator in the excited state to generate active free radicals.

kip-100f

新纳希生产的光引发剂kip-100f由1173和kip-150组成。

the photoinitiator kip-100f produced by synasia is composed of 1173 and kip-150.

从结构上看，1173属于苯乙酮衍生物，是一类自由基型光引发剂。由于1173是液体，非常易于共混，所以适合与其它光引发剂复配使用。对于不饱和聚酯体系和多官能团单体的uv固化体系，1173具有低气味、不黄变、色彩稳定性好等特点，可用于纸张、金属和塑料表面的丙烯酸酯系列的紫外光固化清漆。特别推荐用于要求即使长时间暴露于太阳光下也只有细微黄变的uv涂料。

according to its structure, 1173 is a derivative of acetophenone. it belongs to a kind of free radical photoinitiator. as a liquid, 1173 is very easy to blend, suitable for compounding with other photoinitiators. for the uv curing system of unsaturated polyester systems and multifunctional monomers, 1173 has the characteristics of low odor, non-yellowing property and good color stability. it can be used for uv curing varnishes of acrylic ester series on paper, metal and plastic surfaces. it is especially recommended for uv coatings that require only slight yellowing even when exposed to sunlight for a long time.

uv固化体系中，小分子型的光引发剂在保存过程中，容易挥发和迁移．这一方面会降低光聚合引发效率，另一方面会导致产品出现气味和毒性。尤其是在食品包装袋上印刷的光固化油墨都严禁小分子光引发剂或光敏剂发生迁移，否则会透过食品袋污染内部食品。将小分子光引发剂键合到高分子链上，即可减小这种迁移作用。因此高分子型光引发剂已成为重要的研究发展方向。

in the uv curing system, small molecular photoinitiators are easy to volatilize and migrate during storage. on the one hand, it will reduce the initiation efficiency of photo-polymerization, and on the other hand, it may cause odor and toxicity of the product. in particular, the photocurable ink printed on food packaging bags is strictly prohibited from migrating small molecule photoinitiators or photosensitizers, otherwise it will pollute the internal food through the food bags. bonding the small molecule photoinitiator to the polymer chain can reduce this migration effect. therefore, polymeric photoinitiators have become an important research and development direction.

kip-150是一种高分子型光引发剂，与树脂体系的混溶性较好，低挥发、低迁移，还可制成水乳液，成为水性光固化引发剂。kip-150分子链上含有多个引发剂单元，光辐照时可在一个大分子上同时形成多个自由基，局部自由基浓度可以很高。局部高浓度效应可以有效对付氧阻聚，有利于加速光聚合，但大分子内活性自由基相互互偶合终止的几率也会增加，通过设计分子结构，可以降低分子内自由基偶合。

kip-150 is a polymeric photoinitiator with good miscibility with resin systems, which provides low volatility and low migration. it can also be made into water emulsion and used as water-based photocuring initiator. the molecular chain of kip-150 contains multiple initiator units, which can simultaneously form multiple free radicals on one macromolecule when irradiated by light, and the local free radical concentration can be very high. the local high concentration effect can effectively deal with oxygen inhibition and accelerate photopolymerization, but the probability of mutual coupling termination of active free radicals in macromolecules will also increase. by designing molecular structure, intramolecular free radical coupling can be reduced.

基于高反应性、低气味和颜色稳定性佳的特点，kip-100f通常应用于各类涂料和胶粘剂等，涉及行业包括塑料、木器、金属等。

due to the characteristics of high reactivity, low odor and good color stability, kip-100f is generally used in various coatings and adhesives, etc. it involves in industries like plastics, wood, metal, etc.

阳离子型光引发剂 / cationic photoinitiator

阳离子型光引发剂是另一类非常重要的光引发剂，包括重氮盐、二芳基碘鎓盐、三芳基硫鎓盐、烷基硫鎓盐、铁芳烃盐、磺酰氧基酮及三芳基硅氧醚。适用于阳离子光聚合的单体主要有环氧化合物、乙烯基醚，其次还有内酯、缩醛、环醚等。

cationic photoinitiators are also very important type of photoinitiators, including diazonium salts, diaryliodonium salts, triarylsulfonium salts, alkylsulfonium salts, iron aromatic hydrocarbon salts, sulfonyloxy ketones and triarylsiloxane ether. they are suitable for cationic photopolymerization with monomers which mainly include epoxy compounds and vinyl ethers, followed by lactones, acetals, cyclic ethers, etc.

南通新纳希新材料有限公司提供两款阳离子型光引发剂，分别是uvi-6976和uvi-6992，适配新纳希明星产品——脂环族环氧树脂（牌号s-06e或s-21），以及新纳希氧杂环丁烷类产品（牌号s-101或s-221），在微电子以及信息材料中具有广泛应用。

nantong synasia new material co., ltd. provides two different cationic photoinitiators, uvi-6976 and uvi-6992, which are suitable for use with synasia cycloaliphatic epoxy resin (s-06e or s- 21), as well as synasia oxetane product (s-101 or s-221). our products are widely used in microelectronics and information materials.

uvi-6976是一种混合型三芳基六氟锑酸锍鎓盐阳离子引发剂，主要用于含环氧基团体系的固化。具有引发速度快、内应力小、后固化深层固化好等显著特点。应用于印刷电路板、液晶显示屏和大规模集成电路等尖端制造业。

uvi-6976 is a mixed type triaryl sulfonium hexafluoroantimonate cationic photoinitiator, mainly used for curing systems which contain epoxy groups. it has the remarkable characteristics of fast initiation speed, low internal stress and excellent deep curing. applications include cutting-edge manufacturing industries, such as printed circuit boards, liquid crystal displays and large-scale integrated circuits.

uvi-6992

uvi-6992是一种混合型三芳基六氟磷酸锍鎓盐阳离子引发剂，通常也用于含环氧基团体系的固化，应用也和uvi-6976相同。作为两种三芳基锍鎓盐阳离子引发剂，当引发剂浓度较低时，uvi-6976的引发活性远远高于uvi-6992，但是当引发剂浓度较高时，二者的引发活性相近，两种引发体系得到的聚合物体积收缩均较低。通常应用于油墨、粘合剂和以钛白粉为颜料的厚涂层。

uvi-6992 is a mixed triacylsulfonium hexafluorophosphate cationic photoinitiator. similar to uvi-6976, it is also used for curing epoxy systems. when the initiator concentration is low, the initiating activity of uvi-6976 is much higher than that of uvi-6992, but when the initiator concentration is high, the initiating activity of the two is similar. the volume shrinkage of the polymer obtained by the two initiation systems is lower. our product is usually applied in inks, adhesives and thick coatings which use titanium dioxide as pigment.