The effect of different radiation sources for the UV curing of a screen-printed, water-based polyurethane acrylate binder

2016 ◽  
Vol 132 (4) ◽  
pp. 269-279 ◽  
Author(s):  
Gökhan Akbulut ◽  
Burçak Karagüzel Kayaoğlu ◽  
Mesut Eren ◽  
Bülent Yıldız ◽  
Murat Orbay
Keyword(s):  
Uv Curing ◽  
Polyurethane Acrylate ◽  
Radiation Sources ◽  
Water Based ◽  
Screen Printed

scholarly journals Preparation of a Fast Water-Based UV Cured Polyurethane-Acrylate Wood Coating and the Effect of Coating Amount on the Surface Properties of Oak (Quercus alba L.)

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1414 ◽  
Author(s):  
Jin Wang ◽  
Huagui Wu ◽  
Ru Liu ◽  
Ling Long ◽  
Jianfeng Xu ◽  
...  
Keyword(s):  
Optimal Parameter ◽  
Uv Curing ◽  
Hydroxyl Groups ◽  
Quercus Alba ◽  
Coating Properties ◽  
Wood Coating ◽  
Polyurethane Acrylate ◽  
Wood Coatings ◽  
Wood Flooring ◽  
Water Based

A fast water-based ultraviolet light (UV) curing polyurethane-acrylate (PUA) wood coating was prepared in the laboratory, and applied on oak (Quercus alba L.) at different coating amounts. The PUA wood coating can be fast cured within 22 min, which highly improved the drying speed compared to normal water-based wood coatings (often higher than 35 min). The coating amounts affected the coating properties after curing on oak. With the increase of coating amount, the adhesion, hardness and gloss value of surface increased to different extents. Meanwhile, the surface of sample became smooth gradually because the voids of the oak were filled. Thus, higher coating amount resulted in better coating properties. However, no significant increase of penetration depth was found. During curing, the hydroxyl groups of the wood reacted with the coating. The optimal parameter in this study was the coating amount of 120 g/m2, where the adhesion reached 1 (with 0–5% cross-cut area of flaking along the edges), with the hardness of 2H and the gloss of 92.56°, which met the requirement of Chinese standard GB/T 18103–2013, and could be used for engineered wood flooring.

Study on the Combination Mechanism of the Water-Based UV Curable Ink and Paper

2015 ◽  
Vol 731 ◽  
pp. 488-491
Author(s):  
Fu Qiang Chu ◽  
Yu Xin Liu ◽  
Chang Li Xu
Keyword(s):  
Uv Curing ◽  
Curing Process ◽  
Double Bonds ◽  
Negative Effects ◽  
Uv Curable ◽  
Low Viscosity ◽  
Water Based ◽  
Ft Ir ◽  
Epoxy Acrylate Prepolymer

The bonding mechanism between water-based UV curable ink and active groups on paper’s fiber during curing process was studied in this paper. Low viscosity water-based UV-cured resin was synthesized by epoxy resins, epoxy diluent, acrylic acid and maleic anhydride in the presence of catalyst. The viscosity of the synthesis system and synthetic products were significantly reduced when epoxy diluent was added to replace parts of the epoxy resin. Epoxy diluent was very useful in reducing the viscosity of the product, but over-dose would have negative effects on the quality of the cured film. The water-based epoxy acrylate prepolymer was used as the substitution for the ink to investigate the binding mechanism between the active groups of prepolymer and fiber under UV irradiation. The prepolymer and photoinitiator were mixed and the mixture was diluted to an appropriate viscosity by a small amount of water, then printed on the paper by the method of analog printing and curred by UV curing machine. The printed paper was used to extract lignin by enzymatic/mild acidolysis. FT-IR was used to characterize the changes of the active groups in lignin. The results showed that the changes of active groups in lignin were founded in the existence of ultraviolet and photoinitiator, which consistent with the change of double bonds in prepolymer. The free radicals produced by photoinitiator in curing process not only promoted the double bonds to polymerize, but also accelerated the active groups of lignin binding. Experiments show that chemical bonds exist between them.

Study on the Synthesis of Waterborne UV Curable Polyurethane Acrylate

2016 ◽  
Vol 703 ◽  
pp. 256-260 ◽  
Author(s):  
Zhen Wen Liu ◽  
Jian Yun He ◽  
Wei Jia Kang ◽  
Xi Dan Luo ◽  
Yu Mei Ding ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Influencing Factors ◽  
Water Solubility ◽  
Uv Curing ◽  
Polypropylene Glycol ◽  
Waterborne Coating ◽  
Uv Curable ◽  
Polyurethane Acrylate ◽  
Hydrophilic Group

Water-brone UV-curable polyurethane acrylate was synthesized based on the toluene diisocynate, polypropylene glycol, dihydroxy methyl acrylic acid and hydroxyethyl acrylate. The structure and the influencing factors on the water solubility and photosensitivity of the waterbrone UV-curable polyurethane acrylate were analyzed. Results show that the water solubility of the resin is enhanced with the increasing of the content of hydrophilic group in the resin. The UV-curing rate of the waterborne coating is good by adding the 819-DW photoinitiator. Triethylamine is a good neutralizer in the waterbrone UV-curable system for having 90% neutralization degree.

Blending Property of Water-Based UV-Curable Polyurethane Acrylate and Epoxy Acrylate

2010 ◽  
Vol 174 ◽  
pp. 385-388
Author(s):  
Fu Qiang Chu
Keyword(s):  
Polymer Networks ◽  
Environmental Scanning Electron Microscopy ◽  
Interpenetrating Polymer Networks ◽  
Environmental Scanning ◽  
Epoxy Acrylate ◽  
Uv Curable ◽  
Polyurethane Acrylate ◽  
Water Based ◽  
Optical And Mechanical Properties ◽  
Printing Ink

Water-based UV-curable prepolymers are novel environmentally friendly materials. The blending property of two kinds of the prepolymers, water-based UV-curable polyurethane acrylate (UVPU) and water-based UV-curable epoxy acrylate (WEA), was studied in this paper. Blending compatibility, curing rate, optical and mechanical properties, and the cross-section morphology of the cured films of UVPU and WEA were investigated by Fourier transform infrared (FTIR), UV-visible spectrophotometer (UV-vis) and Environmental scanning electron microscopy (ESEM). Results indicated that the two prepolymers had good blending compatibility and high curing rate under UV radiation. The elongation at break of the cured film by WEA mixed with 20 wt% UVPU had 1.5 times increase compared to pure WEA, and the gloss increased 23% compared to pure UVPU, but the tensile strength decreased slightly. The morphology showed that the molecules of the two prepolymers polymerized each other and formed a network similar to the structure of Interpenetrating Polymer Networks (IPN). The comprehensive properties of the film were improved by blending of WEA and UVPU, and could be widely applied in the fields of coating varnish or printing ink.

Research on the Modification of Waterborne UV-Curable Polyurethane Acrylate

2013 ◽  
Vol 864-867 ◽  
pp. 698-701
Author(s):  
Jian Yun He ◽  
Yong Liu ◽  
Li Chen He ◽  
Qiang Wang
Keyword(s):  
Uv Curing ◽  
Acrylic Resin ◽  
Ethyl Acrylate ◽  
Toluene Diisocyanate ◽  
Polypropylene Glycol ◽  
Hyperbranched Polyester ◽  
Uv Curable ◽  
Polyurethane Acrylate ◽  
Overall Performance ◽  
Influent Factors

In this study, waterborne UV-curable polyurethane acrylic resin was synthesized using polypropylene glycol, toluene diisocyanate, dimethylol propionic acid and hydroxyl ethyl acrylate, and modified by hyperbranched polyester acrylate. The influent factors on hydrophilic properties and UV curing speed of the resin were discussed, and the modified resin has compared with that of unmodified resin. Results showed that the overall performance and UV curing speed of the resin modified by hyperbranched polyester was greatly enhanced, the hydrophilic property of the resin was proportional to hydrophilic group content.

scholarly journals Effect of Graphene Carbon Nitride on Ultraviolet-Curing Coatings

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 153 ◽  
Author(s):  
Zusheng Hang ◽  
Huili Yu ◽  
Yan Lu ◽  
Xu Huai ◽  
Lingpeng Luo
Keyword(s):  
Carbon Nitride ◽  
Composite Coatings ◽  
Uv Curing ◽  
X Ray Diffraction ◽  
Ultraviolet Curing ◽  
Mechanical Mixing ◽  
Pencil Hardness ◽  
Gel Content ◽  
Polyurethane Acrylate ◽  
Anaerobic Environment

Graphene carbon nitride (g-C3N4) was successfully prepared by semi-closed pyrolysis and then incorporated into the ultraviolet (UV)-curing system to synthesize different specimens of g-C3N4-hybridized UV-curing (g-C3N4/UV) coatings. The apparent appearance and dispersity g-C3N4 were characterized through X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR). The influence of the curing speed and mechanical properties was also tested. The dispersion level of g-C3N4 can be kept less than 1 μm by mechanical mixing. The pencil hardness of composite coatings could be 6H while the adhesion based on glass could be 1 level. The degree of curing of the coating could be obviously improved by the addition of g-C3N4, leading to a 7 percent increase of the gel content. Additionally, the decomposition of hard segments of polyurethane acrylate could be avoided by the use of g-C3N4 resulting in an increasing stability to heat. We found the gel content in an aerobic environment was lower than that in an anaerobic environment. On this basis, the function and mechanism of g-C3N4 was investigated in detail and methods to eliminate the O2 were proposed.

Design of polyurethane acrylic antimicrobial films via one-step UV curing

2017 ◽  
Vol 41 (18) ◽  
pp. 9762-9768 ◽  
Author(s):  
Rui Chen ◽  
Ting Li ◽  
Qi Zhang ◽  
Zhongyang Ding ◽  
Piming Ma ◽  
...  
Keyword(s):  
Antimicrobial Properties ◽  
Uv Curing ◽  
Polyurethane Acrylate ◽  
One Step ◽  
Antimicrobial Films

A series of films with excellent antimicrobial properties is prepared from QACs bearing hydrophobic tails and a polyurethane acrylate prepolymer via one-step UV curing.

Study on Photopolymerization Performance of Waterborne UV Cured Ink

2010 ◽  
Vol 174 ◽  
pp. 401-404
Author(s):  
Rui Xin Xu ◽  
Guang Xue Chen
Keyword(s):  
Infrared Spectroscopy ◽  
Uv Curing ◽  
Yellow Pigment ◽  
Water Soluble ◽  
Pigment Content ◽  
Toluene Diisocyanate ◽  
Polyurethane Acrylate ◽  
Optimum Content ◽  
Drying Technology ◽  
Dihydroxy Compound

The anion UV-curing water soluble prepolymer was synthesized with toluene diisocyanate, dihydroxy compound, dihydroxyalkyl carboxylic acid and polyurethane acrylate. The structure of the prepolymer was characterized by infrared spectroscopy. The effect of different photoinitiators, pigment content, drying technology on the curing speed of ink was also researched. The results shown that the photoinitiator system 819DW and MBF was best matched with the yellow pigment, cyan pigment and black pigment, the optimum content of the pigment was about 10 percent, 10 percent and 11 percent. The photoinitiator system 819DW and 500 was best matched with the magenta pigment, the optimum content of the pigment was about 10 percent．Under the conditions of this experiment, the best pigment content of the yellow, magenta, cyan, black was about 6 percent, 7 percent, 6 percent and 7 percent. The curing rate without pre-drying increased.

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