What is the role of uv ink and eb resin?
Ink is one of the main consumables in the printing industry and a major factor in the reproduction of originals. Ink manufacturers are also constantly improving the printability of inks. Binders are the fluid component of inks. With the continuous development of modern industry, new types of ink binders are constantly being used. From the original binders with vegetable oils and natural resins as the main components, to the present, with synthetic resins as the main components. The ink industry has developed by leaps and bounds. Among the available synthetic resins, acrylic resins are the most widely used and can be found in products such as ultraviolet curing (uv) inks, electron beam curing (eb) inks, and water-based inks. The roles and reaction mechanisms of acrylic resins in the above inks are different and the following examples are given. I. Application of acrylic resin in uv ink and eb ink uv ink is an ink that changes from liquid to solid under certain ultraviolet light irradiation. uv ink has wide printing suitability and can be printed by offset, flexographic or screen printing. It has good printing performance on most substrates, and the ink dries quickly, with less organic volatile compounds (voc), and has an impact on the environment. Printed products are small, with strong adhesion fastness, good abrasion resistance, high gloss and other advantages. In recent years, uv ink in offset printing, screen printing, flexographic printing is widely used, its market share has a high annual growth rate, its growth rate far exceeds other types of printing inks. uv ink reaction mechanism is free radical polymerization or cationic polymerization. uv ink composition is important. The structure of the resin prepolymer in the formula and the activity of the functional groups determine the speed of the overall cross-linking polymerization reaction.
At present, the resin used to manufacture uv ink is mostly acrylic resin. Acrylic resins have unsaturated double bond “c = c”. This unsaturation activates the initiator acrylic resin for ink under UV irradiation, which triggers the chain. Reaction polymerization into solid resins, widely used in the manufacture of uv inks. The main acrylic resins used in the ink industry are epoxy acrylate resins, urethane acrylate resins, etc. Epoxy acrylate resin is made by the direct reaction of epoxy resin and acrylic acid. It has the characteristics of fast curing speed, high hardness of paint film and good gloss. uv ink using epoxy acrylate resin can achieve faster product curing speed. In addition, there is an epoxy acrylate resin, which is an epoxy oil acrylate resin obtained by reacting epoxy soybean oil and epoxy linseed oil with acrylic acid. It has low viscosity, good flowability and good pigment wetting and dispersion. However, the curing speed is slow and the film is soft, so it is generally used only as an auxiliary resin in uv ink. Polyester acrylate resin is made by direct esterification dehydration of polyester polyol and acrylic acid, which has good adhesion to materials. Widely used in uv ink. Low molecular weight can be used as a diluent, high molecular weight can be used as the main resin, but polyester acrylate resin high viscosity. If modified with fatty acid, not only can reduce the viscosity of the resin, but also can improve the moisturizing effect of the pigment. Wet dispersibility. Polyurethane acrylate resin is produced by condensation reaction of polyacrylic acid with diisocarbamic acid ethyl ester and ethyl acrylate. The molecular weight of polyurethane acrylate resin can be adjusted and the curing speed can be adjusted to suit the different printing requirements of uv ink.
Polyurethane acrylate resin has strong polyurethane bonds in its molecular structure, so it has high adhesion to plastic, metal and wood, but the cost of polyurethane acrylate resin is high. And temperature has a certain influence on viscosity, room temperature is mostly solid, should be used with active diluent. The following will be combined with a specific formulation of uv ink to introduce the curing mechanism of uv ink. Sheet-fed offset UV ink formulation example: (see Table 1) epoxy acrylate resin 45% benzene even marriage dimethyl ether 4% tetraethylene glycol diacrylate 23% 2-chlorothione 3% diphenylacetone 5% phthalocyanine blue bgs 18% polyethylene microcrystalline wax 2% uv ink drying mechanism is under the action of ultraviolet light, excitation photoinitiator to produce free radicals or ions, these radicals or ions and hydroxyl polymerization . The unsaturated bonds in the compound react with the monomer to form monomeric groups, and then these monomeric groups undergo a chain reaction to complete the curing process. Figure 1: light source → photoinitiator → free radicals —- → with vinyl – → polymer curing film of monomers and prepolymers to trigger the polymerization reaction, the molecular formula of the double bond breakage for Polymerization reaction acrylic resin for ink, to generate polymerized polymer resin. Tetraethylene glycol diacrylate as an active diluent in the ink mainly plays a role in regulating the viscosity of the ink, thereby regulating the printability of acrylic resins. eb ink and uv ink are active ink, drying mechanism is basically the same. In uv inks, photosensitivity to photons is excited by ultraviolet light. It activates the polymer and triggers the polymerization of double bonds in the resin and monomer.
eb ink relies on high-energy electron beam directly bombard the resin prepolymer, so that the resin and monomer double bond polymerization. eb ink used in the resin prepolymer, monomer and UV-curable ink requirements and reaction mechanism is basically the same, here is not repeated. Second, the application of acrylic tree in water-based ink Acrylic resin is not only used in uv ink and eb ink, but also widely used in water-based ink. Water-based ink as an environmentally friendly ink, with less organic volatile compounds (VOC) in the printing process, the health of the printing operator is harmless, the environmental impact is small. It is favored and is beginning to expand into the newspaper printing industry. Water-based ink is a liquid ink that uses water instead of organic solvents. The base component consists of an organic amine component, a solvent and an additive. The base component is organic amine or ammonia, the solvent is water and a small amount of alcohol, and the additives include defoamer, dispersant and wax. Water-based resin is an important part of water-based ink, which directly affects the adhesion performance, drying speed, anti-fouling performance and heat resistance of the ink, and also affects the gloss and ink transfer performance. Therefore, choosing the right resin is the key to water-based inks. It must have easy to form water-soluble salts, good affinity with colorants, high adhesion fastness after printing into film, wear resistance, scratch resistance, good heat resistance, good gloss, etc. High, and need good water release, easy crosslinking and film-forming properties when printed and dried. Commonly used adhesives can be divided into three main categories: water-soluble adhesives, diffusion adhesives and alkali-soluble adhesives.
The main resins used in adhesives are acrylic, polyamide and polyester, but the commonly used ones are acrylic. Acrylic resin is an efficient wetting agent and abrasive, helps dispersion and coloring, good gloss, can reduce the amount of pigments, and is good for environmental protection. According to the practical application in water-based inks, acrylic resins can be divided into two major types: solution type and emulsion type. Compared with these two types, the former is more compatible and stable than the latter. Solution type acrylic resin usually has a molecular weight of 5000-10000 mw. It does not have the characteristics of emulsion state, but has good solubility and gloss, and has good wettability as a carrier and dispersion of pigments. However, its disadvantage is slow drying and poor continuous film formation, so it is generally not used alone, but combined with other emulsions. There are many varieties of emulsion acrylic resins, but the state of emulsion particles formed by different components is also different, and the physical and chemical properties are also different. There are usually two kinds of colloidal dispersions and conjugate emulsions. Colloidal dispersions are mostly copolymers of acrylic acid and styrene, with molecular weights between 15000-40000mw. Since the particle number is less than the limit required for emulsion, it is not a true emulsion, but the particle size is large enough to add a large amount of water. Dilution. This emulsion is generally used for printing inks for corrugated boxes. Junction film emulsions have good oil and water resistance and good gloss due to their high molecular weight. It has good adhesion on non-absorbent substrates, low glass transition temperature, good film formation and resistance, and is widely used for printing on impermeable and dry substrates such as films and metal foils. The following combined with the reference formula description: (see Table 2) ingredient ratio glycol 0.5% acrylic resin 26% isopropyl alcohol 1.5% pigment carbon ink 16% defoaming additives 1% ammonia (28%) 4% water 50% phthalocyanine blue b1% water-based ink drying is mainly volatile drying and osmotic drying, drying mechanism is the main resin in the binder contains carboxyl (acrylic resin) (-cooh), adding After adding a certain amount of amine group (-nh2) alkaline substance, the amine group reacts with the carboxyl group in the resin to produce water-soluble organic amine salt. In the drying process of the ink, after the oxygen evaporates, the resin in the ink returns to a water-insoluble ink film, thus completing the drying and curing of the ink. The above formula requires strict control of the amount of ammonia, and generally control the ph value of the ink.
UV Photoinitiator 同系列产品
| 光引发剂 TPO | 化学文摘社编号 75980-60-8 |
| 光引发剂 TMO | cas 270586-78-2 |
| 光引发剂 PD-01 | 化学文摘社编号 579-07-7 |
| 光引发剂 PBZ | 化学文摘社编号 2128-93-0 |
| 光引发剂 OXE-02 | cas 478556-66-0 |
| 光引发剂 OMBB | 化学文摘社 606-28-0 |
| 光引发剂 MPBZ (6012) | CAS 86428-83-3 |
| 光引发剂 MBP | 化学文摘社编号 134-84-9 |
| 光引发剂 MBF | 化学文摘社编号 15206-55-0 |
| 光引发剂 LAP | 化学文摘社编号 85073-19-4 |
| 光引发剂 ITX | CAS 5495-84-1 |
| 光引发剂 EMK | 化学文摘社编号 90-93-7 |
| 光引发剂 EHA | 化学文摘社编号 21245-02-3 |
| 光引发剂 EDB | CAS 10287-53-3 |
| 光引发剂 DETX | 化学文摘社编号 82799-44-8 |
| 光引发剂 CQ / 樟脑醌 | 化学文摘社编号 10373-78-1 |
| 光引发剂 CBP | 化学文摘社编号 134-85-0 |
| 光引发剂 BP / 二苯甲酮 | 化学文摘社编号 119-61-9 |
| 光引发剂 BMS | 化学文摘社 83846-85-9 |
| 光引发剂 938 | 化学文摘社编号 61358-25-6 |
| 光引发剂 937 | CAS 71786-70-4 |
| 光引发剂 819 DW | cas 162881-26-7 |
| 光引发剂 819 | cas 162881-26-7 |
| 光引发剂 784 | cas 125051-32-3 |
| 光引发剂 754 | CAS 211510-16-6 442536-99-4 |
| 光引发剂 6993 | 化学文摘社编号 71449-78-0 |
| 光引发剂 6976 | cas 71449-78-0 89452-37-9 108-32-7 |
| 光引发剂 379 | cas 119344-86-4 |
| 光引发剂 369 | cas 119313-12-1 |
| 光引发剂 160 | 化学文摘社编号 71868-15-0 |
| 光引发剂 1206 | |
| 光引发剂 1173 | 化学文摘社编号 7473-98-5 |
UV Monomer 同系列产品
| 聚硫醇/聚硫醇 | ||
| DMES 单体 | 双（2-巯基乙基）硫醚 | 3570-55-6 |
| DMPT 单体 | THIOCURE DMPT | 131538-00-6 |
| PETMP 单体 | 7575-23-7 | |
| PM839 单体 | 聚氧（甲基-1,2-乙二基） | 72244-98-5 |
| 单官能团单体 | ||
| HEMA 单体 | 甲基丙烯酸 2-羟乙基酯 | 868-77-9 |
| HPMA 单体 | 甲基丙烯酸羟丙酯 | 27813-02-1 |
| THFA 单体 | 丙烯酸四氢糠酯 | 2399-48-6 |
| HDCPA 单体 | 氢化双环戊烯丙烯酸酯 | 79637-74-4 |
| DCPMA 单体 | 甲基丙烯酸二氢双环戊二烯酯 | 30798-39-1 |
| DCPA 单体 | 丙烯酸二氢双环戊二烯酯 | 12542-30-2 |
| 二氯丙烯酰亚胺单体 | 甲基丙烯酸二环戊氧基乙酯 | 68586-19-6 |
| DCPEOA 单体 | 丙烯酸二环戊烯基氧基乙基酯 | 65983-31-5 |
| NP-4EA 单体 | (4) 乙氧基化壬基酚 | 50974-47-5 |
| LA 单体 | 丙烯酸十二烷基酯/丙烯酸十二烷基酯 | 2156-97-0 |
| THFMA 单体 | 甲基丙烯酸四氢糠酯 | 2455-24-5 |
| PHEA 单体 | 2-苯氧基乙基丙烯酸酯 | 48145-04-6 |
| LMA 单体 | 甲基丙烯酸月桂酯 | 142-90-5 |
| IDA 单体 | 丙烯酸异癸酯 | 1330-61-6 |
| IBOMA 单体 | 甲基丙烯酸异冰片酯 | 7534-94-3 |
| IBOA 单体 | 丙烯酸异冰片酯 | 5888-33-5 |
| EOEOEA 单体 | 2-(2-乙氧基乙氧基)丙烯酸乙酯 | 7328-17-8 |
| 多功能单体 | ||
| DPHA 单体 | 29570-58-9 | |
| DI-TMPTA 单体 | 二（三羟甲基丙烷）四丙烯酸酯 | 94108-97-1 |
| 丙烯酰胺单体 | ||
| ACMO 单体 | 4-丙烯酰基吗啉 | 5117-12-4 |
| 双功能单体 | ||
| PEGDMA 单体 | 聚乙二醇二甲基丙烯酸酯 | 25852-47-5 |
| TPGDA 单体 | 三丙二醇二丙烯酸酯 | 42978-66-5 |
| TEGDMA 单体 | 三乙二醇二甲基丙烯酸酯 | 109-16-0 |
| PO2-NPGDA 单体 | 丙氧基新戊二醇二丙烯酸酯 | 84170-74-1 |
| PEGDA 单体 | 聚乙二醇二丙烯酸酯 | 26570-48-9 |
| PDDA 单体 | 邻苯二甲酸二乙二醇二丙烯酸酯 | |
| NPGDA 单体 | 新戊二醇二丙烯酸酯 | 2223-82-7 |
| HDDA 单体 | 二丙烯酸六亚甲基酯 | 13048-33-4 |
| EO4-BPADA 单体 | 乙氧基化 (4) 双酚 A 二丙烯酸酯 | 64401-02-1 |
| EO10-BPADA 单体 | 乙氧基化 (10) 双酚 A 二丙烯酸酯 | 64401-02-1 |
| EGDMA 单体 | 乙二醇二甲基丙烯酸酯 | 97-90-5 |
| DPGDA 单体 | 二丙二醇二烯酸酯 | 57472-68-1 |
| 双-GMA 单体 | 双酚 A 甲基丙烯酸缩水甘油酯 | 1565-94-2 |
| 三官能单体 | ||
| TMPTMA 单体 | 三羟甲基丙烷三甲基丙烯酸酯 | 3290-92-4 |
| TMPTA 单体 | 三羟甲基丙烷三丙烯酸酯 | 15625-89-5 |
| PETA 单体 | 3524-68-3 | |
| GPTA ( G3POTA ) 单体 | 丙氧基三丙烯酸甘油酯 | 52408-84-1 |
| EO3-TMPTA 单体 | 三羟甲基丙烷三丙烯酸乙氧基化物 | 28961-43-5 |
| 光阻单体 | ||
| IPAMA 单体 | 2-异丙基-2-金刚烷基甲基丙烯酸酯 | 297156-50-4 |
| ECPMA 单体 | 1-乙基环戊基甲基丙烯酸酯 | 266308-58-1 |
| ADAMA 单体 | 1-金刚烷基甲基丙烯酸酯 | 16887-36-8 |
| 甲基丙烯酸酯单体 | ||
| TBAEMA 单体 | 2-(叔丁基氨基)乙基甲基丙烯酸酯 | 3775-90-4 |
| NBMA 单体 | 甲基丙烯酸正丁酯 | 97-88-1 |
| MEMA 单体 | 甲基丙烯酸 2-甲氧基乙酯 | 6976-93-8 |
| i-BMA 单体 | 甲基丙烯酸异丁酯 | 97-86-9 |
| EHMA 单体 | 甲基丙烯酸 2-乙基己酯 | 688-84-6 |
| EGDMP 单体 | 乙二醇双(3-巯基丙酸酯) | 22504-50-3 |
| EEMA 单体 | 2-甲基丙-2-烯酸 2-乙氧基乙酯 | 2370-63-0 |
| DMAEMA 单体 | 甲基丙烯酸 N,M-二甲基氨基乙酯 | 2867-47-2 |
| DEAM 单体 | 甲基丙烯酸二乙氨基乙酯 | 105-16-8 |
| CHMA 单体 | 甲基丙烯酸环己基酯 | 101-43-9 |
| BZMA 单体 | 甲基丙烯酸苄酯 | 2495-37-6 |
| BDDMP 单体 | 1,4-丁二醇二（3-巯基丙酸酯） | 92140-97-1 |
| BDDMA 单体 | 1,4-丁二醇二甲基丙烯酸酯 | 2082-81-7 |
| AMA 单体 | 甲基丙烯酸烯丙酯 | 96-05-9 |
| AAEM 单体 | 甲基丙烯酸乙酰乙酰氧基乙基酯 | 21282-97-3 |
| 丙烯酸酯单体 | ||
| IBA 单体 | 丙烯酸异丁酯 | 106-63-8 |
| EMA 单体 | 甲基丙烯酸乙酯 | 97-63-2 |
| DMAEA 单体 | 丙烯酸二甲胺基乙酯 | 2439-35-2 |
| DEAEA 单体 | 2-(二乙基氨基)乙基丙-2-烯酸酯 | 2426-54-2 |
| CHA 单体 | 丙-2-烯酸环己基酯 | 3066-71-5 |
| BZA 单体 | 丙-2-烯酸苄酯 | 2495-35-4 |