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UV固化技術(shù)具有環(huán)境污染小、固化速度快、能耗低等特點。它是油墨、涂料、印刷和包裝領(lǐng)域增長最快的細(xì)分市場。UV固化樹脂體系主要由光引發(fā)劑、活性低聚物、活性稀釋劑等助劑組成。

UV-curing technology is characterized by less environmental pollution, fast curing speed, low energy consumption. It is the fastest growing market segment in the ink, coating, printing and packaging fields. UV-curing resin system is mainly composed of photoinitiator, reactive oligomer, active diluent and other additives.

光引發(fā)劑是紫外光固化樹脂體系的關(guān)鍵成分，對固化速度起著決定性作用。根據(jù)反應(yīng)機(jī)理不同，光引發(fā)劑可分為自由基型和陽離子型。本文中我們將介紹不同自由基光引發(fā)劑的應(yīng)用。

Photoinitiator is the key component of uv-curing resin system, which plays a decisive role in curing rate. According to different reaction mechanism, photoinitiators can be divided into free radical type and cationic type. In this post, we will introduce you the application of different free radical photoinitiators. 

常用自由基光引發(fā)劑Common free-radical photoinitiators

KIP-100F和KIP-150光引發(fā)劑

KIP-100F and KIP-150 Photoinitiator 

KIP-100F和KIP-150特別適用于需要極低固化氣味和顏色穩(wěn)定性的UV固化體系的光聚合。當(dāng)在與水相容的溶劑中預(yù)稀釋時，它適用于水基 UV 固化體系。主要應(yīng)用包括粘合劑、印刷油墨、地板涂料、木材、塑料、紙張、金屬和光纖的清漆。最佳濃度為0.5%至5%（重量），具體取決于系統(tǒng)組成、厚度和所需的固化速度。

KIP-100F is particularly indicated for the photopolymerisation of UV curable systems when very low curing odor and colorstability are required. It is suitable for water based UV curable systems when prediluted in a water compatible solvent. Main applications include adhesives, printing inks, coatings for flooring,clear lacquers for wood, plastic, paper, metal and optical fibers. Optimum concentration is between 0.5 and 5% by weight and depending on system composition, thickness, and desired cure speed.

KIP-150是一種高分子型光引發(fā)劑，與樹脂體系的混溶性較好，低揮發(fā)、低遷移，還可制成水乳液，成為水性光固化引發(fā)劑。KIP-150分子鏈上含有多個引發(fā)劑單元，光輻照時可在一個大分子上同時形成多個自由基，局部自由基濃度可以很高。局部高濃度效應(yīng)可以有效對付氧阻聚，有利于加速光聚合，但大分子內(nèi)活性自由基相互互偶合終止的幾率也會增加，通過設(shè)計分子結(jié)構(gòu)，可以降低分子內(nèi)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.

新納希生產(chǎn)的光引發(fā)劑KIP-100F由1173和KIP-150組成。基于高反應(yīng)性、低氣味和顏色穩(wěn)定性佳的特點，KIP-100F通常應(yīng)用于各類涂料和膠粘劑等，涉及行業(yè)包括塑料、木器、金屬等。

The photoinitiator KIP-100F produced by Synasia is composed of 1173 and KIP-150. 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.

1173光引發(fā)劑

1173 Photoinitiator

1173是一種高效、不黃變的紫外光引發(fā)劑。該不飽和聚酯光固化體系具有低氣味、不黃變、顏色穩(wěn)定性好等特點。

1173 is a high-efficiency, non-yellowing UV photoinitiator. The UV curing system of unsaturated polyester system has the characteristics of low odor, non-yellowing and good color stability. 

1173是一種多功能液體光引發(fā)劑，可用于紙張、金屬和塑料表面的丙烯酸系列UV固化清漆。特別推薦用于即使長時間暴露在陽光下也只需要輕微泛黃的UV涂料。1173具有良好的相容性，可以很容易地與其他光引發(fā)劑和預(yù)聚物混合。

1173 is a multifunctional liquid photoinitiator, which can be used for the acrylicseries of UV-curable varnishes 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. 1173 has good compatibility and can be easily mixed with other photoinitiators and prepolymers.

TPO光引發(fā)劑

TPO Photoinitiator

TPO性能優(yōu)良，通常與仲胺、叔胺配合使用，已廣泛應(yīng)用于涂料、油墨、粘合劑、緩蝕劑、焊料等行業(yè)。21世紀(jì)以來，TPO引發(fā)劑在UV固化領(lǐng)域得到了廣泛推廣和應(yīng)用。

TPO has excellent performance and is often used in combination with secondary amine and tertiary amine. It has been widely used in coatings, inks, adhesives, corrosion inhibitors, solders and other industries. Since 21st century, TPO initiator has been widely promoted and applied in the field of UV curing.

TPO的長紫外波長吸收范圍較寬。其有效吸收峰為350nm～400nm，一直吸收到420nm波長。其吸收峰比常規(guī)引發(fā)劑長。正因如此，TPO光引發(fā)劑被廣泛應(yīng)用于光固化涂料、印刷油墨、光固化膠粘劑、光纖涂料等領(lǐng)域。并且由于其光漂白作用，光引發(fā)劑TPO專門用于厚膜和白色系統(tǒng)。它可以在白色或高鈦白粉的著色表面上完全固化。TPO引發(fā)劑還可用于透明涂料，特別是對氣味要求低的產(chǎn)品。

TPO has a wide range of long UV wavelength absorption. Its effective absorption peak is 350nm ~ 400 nm, and absorbs all the way to 420 nm wavelength. Its absorption peak is longer than that of conventional initiator. Because of this, TPO photoinitiator is widely used in many applications, such as ultraviolet curing coatings, printing inks, ultraviolet curing adhesives, optical fiber coatings, etc. And because of its function of photobleaching, TPO is specially used in thick film and white systems. It can be completely cured on the pigmented surface of white or high titanium dioxide. TPO initiator can also be used for transparent coatings, especially for products with low odor requirements.

819光引發(fā)劑

819 Photoinitiator

819是BAPO型光引發(fā)劑之一，可吸收430nm以上的近可見光區(qū)中較長波長的紫外光。該波長的光更深地穿透涂層的較厚層，從而實現(xiàn)完全固化效果。較短波長的光（大約230nm）具有更高的光子能量，但與較長波長的光相比穿透性較差。這種較短波長的光對于表面固化特別有用。

819 is one of BAPO type photoinitiators, which absorbs longer wavelength UV light in the near visible region above 430nm. Light of this wavelength penetrates deeper into the thicker layers of the coating, thus enabling the through curing effect. Shorter wavelength light, around 230nm, is of higher photon energy but is less penetrating than that of longer wavelengths. Light of this shorter wavelength is particularly useful for surface curing.

酰基氧化膦光引發(fā)劑819作為一種新型光引發(fā)劑，以其優(yōu)異的性能被廣泛應(yīng)用于涂料、油墨、粘合劑等行業(yè)。它們在紫外線和可見光區(qū)域具有更大的吸收，并且可以比其他光引發(fā)劑更有效地引發(fā)固化，用于含顏料的涂料。?；趸⒐庖l(fā)劑固化和長期光照后不易變黃，可用于對變黃要求較嚴(yán)格的場合，如白色、淺色油墨、油漆等。此外，?；趸庥衅鬃饔?，可以穿透涂層，幫助厚膜徹底固化。

As a new type of photoinitiator, acylphosphine oxides, such as photoinitiator 819, have been widely used in coatings, inks, adhesives and other industries for their excellent properties. They have greater absorption in the ultraviolet andvisible regions, and can initiate curing more effectively than other photoinitiators for coatings containing pigments. Acyl phosphine oxide photoinitiators hardly yellows after curing and long-term light radiation, sothey can be used in occasions where yellowing requirements are stricter, suchas white, light ink and paint. In addition, acylphosphine oxides have bleaching effect on light, which can penetrate the coating and help the thick film to be cured thoroughly.

此外，光引發(fā)劑819還可用于有色紫外線固化塑料涂料。UV涂料因其優(yōu)異的性能和高效的生產(chǎn)效率，已廣泛應(yīng)用于各種電子、家電產(chǎn)品的塑料外殼。但是，UV涂料加色后深度固化不好，導(dǎo)致涂膜附著力差，UV樹脂對顏料的分散和排列差，嚴(yán)重影響涂膜外觀，所以傳統(tǒng)的施工工藝是先涂以溶劑型有色底漆進(jìn)行著色，烘烤后再涂上UV清漆，以提高漆膜表面的物理性能。

In addition, photoinitiator 819 can also be used in colored UV curable plastic coatings. Because of its excellent performance and efficient production, UV coatings have been widely used in plastic shells of various electronic and household appliances products. However, the deep curing of UV coatings after color addition is not good, resulting in poor film adhesion, and the dispersion and arrangement of UV resins to pigments is poor, seriously affecting the appearance of the film, so the traditional construction process is to first coat solvent-based colored primer for coloring, after baking and then coated with UV varnish to improve the physical properties of the film surface.

ITX光引發(fā)劑

ITX Photoinitiator

ITX是一種高效的自由基II型光引發(fā)劑，用于對應(yīng)樹脂和叔胺的UV固化。

ITX is a highly effective free radical type II photoinitiator, which uses for UV curing of corresponding resin and tertiary amine.

ITX用于絲網(wǎng)印刷油墨、清漆、平版油墨、柔版油墨、電子產(chǎn)品和木器涂料。也可用作光敏劑，增強UV 907的固化性能。吸收峰為258-382 nm。推薦用量為 0.2-2%。

ITX is used in screen printing inks, varnishes, lithographic inks, flexo inks, electronic products, and wood coatings. It can also be used as a photosensitizer to enhance the curing properties of UV 907. The absorption peak is 258-382 nm. Recommended amount is 0.2-2%. 

184光引發(fā)劑

184 Photoinitiator

1-羥基環(huán)己基苯基酮較通俗的名稱是光引發(fā)劑184。作為最常用的光引發(fā)劑之一，1-羥基環(huán)己基苯基酮具有良好的抗黃變能力和低異味。其在甲醇溶液中的吸收峰為246nm、280nm、333nm，故主要吸收短波長紫外光。1-羥基環(huán)己基苯基酮用于引發(fā)化學(xué)不飽和預(yù)聚物的光聚合，例如丙烯酸酯與單官能或多官能乙烯基單體結(jié)合使用。

The more popular name of 1-Hydroxycyclohexyl Phenyl Ketone is photoinitiator 184. As one of the most commonly used photoinitiators, 1-Hydroxycyclohexyl Phenyl Ketone has good yellowing resistant ability and low oddor. Its absorption peak in methanol solution is 246nm, 280nm, 333nm, so it mainly absorbs short wavelength UV light. 1-Hydroxycyclohexyl Phenyl Ketone is used to initiate the photopolymerisation of chemically unsaturated prepolymers – e.g. acrylates – in combination with mono- or multifunctional vinyl monomers.

實驗表明：紫外線的波長越長，穿透性越強，越容易到達(dá)薄膜的深層，而波長越短，越難到達(dá)薄膜的深層。所以1-羥基環(huán)己基苯基酮有利于表面固化。如果用于較厚的薄膜配方，它通常與光引發(fā)劑819共同引發(fā)，以達(dá)到表面和基底的平衡效果。

Experimentshows that: the longer the wavelength of the UV light is, the stronger the penetrability is, the easier it is to reach the deep layer of the film, while the shorter the wavelength is, the harder it is to reach the deep layer of the film. So 1-Hydroxycyclohexyl Phenyl Ketone is good for surface curing. If for thicker film formulation, it often co-initiates with photoinitiator 819 to achieve the balance effect both on surface and base.

南通新納希新材料有限公司以具有競爭力的價格生產(chǎn)高質(zhì)量的脂環(huán)族環(huán)氧樹脂和各類紫外光引發(fā)劑，如KIP，1173等。請與我們聯(lián)系以獲取更多信息。

Nantong Synasia New Material Co., Ltd. produces cycloaliphatic epoxy resins and various UV photoinitiators such as KIP, 1173, etc. in high quality with competitive price. Please contact us for more information.