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.

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 Coating Performance of Water-Based Polyurethane-Acrylate Coating on Bamboo/Bamboo Scrimber Substrates

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Jianfeng Xu ◽  
Ru Liu ◽  
Huagui Wu ◽  
Hongyun Qiu ◽  
Yanglun Yu ◽  
...  
Keyword(s):  
Contact Angle ◽  
Solid Content ◽  
High Solid Content ◽  
Coating Properties ◽  
Average Roughness ◽  
Coating Performance ◽  
Polyurethane Acrylate ◽  
Heat Treated ◽  
Water Based ◽  
Bamboo Scrimber

In this paper, a kind of high solid content water-based polyurethane-acrylate (PUA) coating was synthesized in laboratory. Bamboo, bamboo scrimber, and heat-treated bamboo scrimber were selected as substrates and coated with the PUA coating. The coating properties of those materials were investigated. The results showed that PUA coating could well cover the surface of the three kinds of materials. However, the coating performances varied among these substrates due to their different chemical and morphological surfaces. Due to the densified structures, small pores, and improved hydrophobicity of bamboo scrimber, it was difficult for PUA coating to wet and penetrate into the substrate, where the smaller contact angle and penetration depth were obtained compared with bamboo. In contrast, heat-treated one had better hydrophilicity and smaller contact angle with PUA coating than pure bamboo scrimber. Therefore, the coating performance of heat-treated bamboo scrimber was better with lower average roughness value. However, the adhesion classification between the coating and all substrates was 2 (with 5-15% cross-cut area of flaking along the edges).

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.

scholarly journals Application of Confocal Raman Microscopy for the Analysis of the Distribution of Wood Preservative Coatings

Coatings ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 621 ◽  
Author(s):  
Toru Kanbayashi ◽  
Atsuko Ishikawa ◽  
Masahiro Matsunaga ◽  
Masahiko Kobayashi ◽  
Yutaka Kataoka
Keyword(s):  
Surface Layer ◽  
Cell Walls ◽  
Wood Preservative ◽  
Cellular Level ◽  
Raman Microscopy ◽  
Confocal Raman Microscopy ◽  
Wood Coating ◽  
Coating Technology ◽  
Wood Coatings ◽  
Confocal Raman

The distribution of wood preservative coatings in wood surface layer was assessed at the cellular level using confocal Raman microscopy. Raman images were created based on the fingerprint Raman bands of the different wood polymers and coating components (resin and pigment). The wood cell walls and the distribution of the resin and pigment were clearly visualized at the same time. It was concluded that confocal Raman microscopy is suitable for the evaluation of the microdistribution of wood coatings, providing valuable information for the improvement of wood coating technology.

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.

Modification of Nano MgCO3 Puree on the Mechanical Properties and Gloss for Waterborne UV-Curing Wood Coatings

2017 ◽  
Vol 864 ◽  
pp. 100-105
Author(s):  
Xiao Xing Yan ◽  
Yun Ting Cai ◽  
Huan Ye ◽  
Ye Ping Yuan ◽  
Zhi Hui Wu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Process Parameters ◽  
Uv Curing ◽  
Properties Of Coatings ◽  
Wood Coatings

In this paper, waterborne ultraviolet (UV)-curing wood coatings were modified by nano MgCO3 puree, and prepared by optimizing the process parameters. The mechanical properties (hardness, adhesion and resistance impact strength) and gloss of waterborne UV-curing wood coatings modified by nano MgCO3 puree were tested. It was found that the mechanical properties of coatings increased when nano MgCO3 content increased from 0 to 3.0%. Waterborne UV-curing wood coatings had good hardness, adhesion and impact strength when the nano MgCO3 content was 3%-4%. The hardness was 3H, the adhesion was grade 1, and impact strength was 40 kg∙cm. However, when nano MgCO3 content was higher than 4%, the mechanical properties of coatings decreased. As the nano MgCO3 content gradually increasing, the gloss of waterborne UV-curing wood coatings modified by nano MgCO3 puree decreased. When the nano MgCO3 content was 4.0%, the gloss of coating was 33%. When the nano MgCO3 content exceeded 4.0%, the gloss of waterborne UV-curing wood coatings displayed matte.

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 Wood coating dust emission in the Malaysian furniture industry: A case study

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 6874-6885
Author(s):  
Jegatheswaran Ratnasingam ◽  
Tajuddin Hj Arshad ◽  
Albert Khoo ◽  
Hazirah Ab Latib ◽  
Lim Choon Liat ◽  
...  
Keyword(s):  
Dust Emission ◽  
Dust Particles ◽  
Coating Film ◽  
Furniture Industry ◽  
Wood Coating ◽  
Dust Extraction ◽  
Film Hardness ◽  
Wood Coatings ◽  
Clean Air ◽  
Industry Needs

The objectives of this study were to evaluate the current dust extraction efficiency used in the Malaysian furniture industry and also the effectiveness of using engineered nanoparticle (ENP)-added coatings to reduce dust emission in the wood finishing operation. This study was in response to the enforcement of the Clean Air Regulation (2014), which requires significant improvements in the air quality and the work environment in the wood-based industry in Malaysia. A series of sanding experiments with different abrasive grit sizes and different coating types were conducted to determine the dust emission levels. The results suggested that higher capture velocity of 30 m/s was necessary to effectively capture the wood coating dust emitted. Further, ENP-added wood coatings did not differ markedly from conventional coatings with regard to dust emission characteristics. The study also revealed that total dust concentration had an inverse relationship, while the amount of finer dust particles was linearly related to the coating film hardness. Therefore, to comply with the Clean Air Regulation, the Malaysian furniture industry needs to significantly improve its dust extraction system.

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