scholarly journals Effect of Water-Based Emulsion Core Microcapsules on Aging Resistance and Self-Repairing Properties of Water-Based Coatings on Linden

2021 ◽  
Vol 11 (10) ◽  
pp. 4662
Author(s):  
Xiaoxing Yan ◽  
Wenting Zhao ◽  
Xingyu Qian
Keyword(s):  
Urea Formaldehyde ◽  
Paint Film ◽  
Coating Film ◽  
Coating Technology ◽  
Fracture Elongation ◽  
Aging Resistance ◽  
Water Based ◽  
Color Aberration ◽  
Optical And Mechanical Properties ◽  
Technical Basis

The purpose of this paper was to discuss the best coating technology of water-based coatings containing microcapsules, and the anti-aging and self-repairing properties of water-based coatings containing microcapsules. Urea-formaldehyde encapsulated Nippon water-based emulsion microcapsules were prepared, and water-based coatings containing microcapsules were prepared. The optical and mechanical properties of the coatings under different coating technologies were investigated. Under the best coating technology, the aging resistance and self-repairing performance of the coating film were investigated. Experimental results showed that coating technology had no effect on color aberration of the coating film. The coating technology with two coats of primer, three coats of topcoat, addition of microcapsules into primer, had excellent glossiness, shock resistance of 12.0 kg·cm, adhesion of 0 grade, and fracture elongation of 26.3%. Compared with the coating film without microcapsules, the coating with microcapsules had better aging resistance and self-repairing property, and the self-repairing rate was about 20.0%. Compared with the paint film with Dulux water-based emulsion microcapsules, the paint film with Nippon water-based emulsion microcapsules had a higher self-repairing rate. This study provides a technical basis for self-repairing water-based coatings.

scholarly journals Preparation and Performance of Thermochromic and Self-Repairing Dual Function Paint Film with Lac Resin Microcapsules and Fluorane Microcapsules

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3109
Author(s):  
Xiaoxing Yan ◽  
Wenting Zhao ◽  
Lin Wang
Keyword(s):  
In Situ Polymerization ◽  
Urea Formaldehyde ◽  
Paint Film ◽  
Impact Resistance ◽  
Core Material ◽  
Wall Material ◽  
Formaldehyde Resin ◽  
Dual Function ◽  
Aging Resistance ◽  
Water Based

Microcapsules with lac resin as the core material and urea-formaldehyde resin as the wall material were prepared by in situ polymerization, and then the lac resin microcapsules and fluorane microcapsules were added into a water-based primer or topcoat, respectively, to prepare water-based coatings with dual functions of thermochromic and self-repair. The effects of different methods of adding microcapsules on the optical properties, mechanical properties, self-repairing properties, and the aging resistance of water-based paint film were investigated, so as to prepare water-based paint film with the best discoloration and self-repairing functions. The results showed that the paint film with 10.0% fluorane microcapsules in the topcoat and 5.0% lac resin microcapsules in the primer had better comprehensive properties, and the paint film changed from yellow to colorless at 32 °C, with a color difference of 68.9, hardness of 3H, adhesion grade of 0, impact resistance of 13.0 kg∙cm, and elongation at break of 20.0%. The resistance of the paint film to NaCl, ethanol, and detergent was grade 2, with slight discontinuous marks, and the resistance to red ink was grade 3, with slight marks. The lac resin microcapsules have good aging resistance, which can enhance the aging resistance of the paint film with fluorane microcapsules. The gap width of the paint film was repaired by 2.1 µm, the self-repairing rate was 12.3%, and the paint film with lac resin microcapsules had a better crack inhibition effect. The results have provided a reference for multifunctional wood coatings.

scholarly journals Effect of Urea-Formaldehyde (UF) with Waterborne Emulsion Microcapsules on Properties of Waterborne Acrylic Coatings Based on Coating Process for American Lime

2020 ◽  
Vol 10 (18) ◽  
pp. 6341 ◽  
Author(s):  
Xiaoxing Yan ◽  
Wenting Zhao ◽  
Xingyu Qian
Keyword(s):  
Urea Formaldehyde ◽  
Paint Film ◽  
Coating Process ◽  
Self Healing ◽  
Waterborne Coatings ◽  
Aging Resistance ◽  
Acrylic Coatings ◽  
Waterborne Emulsion ◽  
The Impact ◽  
Good Coating

The purpose of this paper is to explore the effect of urea-formaldehyde (UF) with waterborne emulsion microcapsules on the optical, mechanical and aging resistance properties of waterborne coatings from the perspective of coating process. In this paper, the microcapsules were prepared with UF resin as the wall materials and waterborne emulsion as the core materials. Based on the coating process, the optical, mechanical and aging resistance properties of the waterborne acrylic coatings with microcapsules for American lime were tested. The good coating process is three layers of primer, two layers of topcoat, and adding microcapsules into primer. The results showed that the coating process had little effect on the color difference of the paint film with microcapsules, the gloss of the paint film prepared by the good coating process was basically not changed, and the mechanical properties of the paint film were good. At this time, the hardness grade of the paint film was 3H, the adhesion was grade 0, the impact resistance was 110.0 N·cm−2, and the elongation at break was 29.7%. The microcapsules added to the primer had better liquid resistance than those added to the topcoat. The paint film had good stability and aging resistance, and could inhibit the generation of microcracks to a certain extent. The paint film prepared by the good coating process had better comprehensive performance. This work provides a technical reference for self-healing of the waterborne coatings on American lime.

scholarly journals Effect of Water-Based Acrylic Acid Microcapsules on the Properties of Paint Film for Furniture Surface

2021 ◽  
Vol 11 (16) ◽  
pp. 7586
Author(s):  
Xiaoxing Yan ◽  
Wenwen Peng ◽  
Xingyu Qian
Keyword(s):  
Tensile Strength ◽  
Service Life ◽  
Acrylic Acid ◽  
Urea Formaldehyde ◽  
Paint Film ◽  
Impact Resistance ◽  
Color Difference ◽  
Self Healing ◽  
Water Based ◽  
The Impact

In this paper, self-healing microcapsules with urea formaldehyde coated Nippon water-based acrylic acid were prepared, and the performance of water-based topcoat paint film added with self-healing microcapsules and the repair effect of microcapsules were investigated. The results show that when the content of microcapsules in water-based topcoat paint film on the surface of wood increased, the color difference and hardness rose gradually, the gloss and adhesion declined gradually, the impact resistance and tensile strength at break rose first and then declined. The 0.67:1 core-wall ratio microcapsules had a better micromorphology, and the water-based topcoat paint film with 0.67:1 microcapsules had a certain repair effect. The microcapsules were added to the water-based topcoat paint film to repair the coating to a certain extent, which provide technical reference for prolonging the service life of water-based topcoat paint film for the furniture surface.

scholarly journals Anticorrosion coatings based on novel acrylate binders containing MeO nanoparticles

2019 ◽  
Vol 63 (4) ◽  
pp. 153-158
Author(s):  
D. Steinerová ◽  
A. Kalendová ◽  
J. Machotová ◽  
M. Kohl
Keyword(s):  
Air Pollution ◽  
Paint Film ◽  
Film Properties ◽  
Present Contribution ◽  
Protective Properties ◽  
Mgo Nanoparticles ◽  
Anticorrosion Coatings ◽  
Volatile Organic ◽  
Water Based ◽  
Particle Shapes

Abstract Water based paints are increasingly attracting interest mainly with a view to reducing air pollution with volatile organic compounds (VOC). However, the protective properties of water-based paints are inferior to those of solvent-based paints and so new ways to increase the resistance of water-based systems are sought. The present contribution describes the preparation and testing of environmentally friendly anti-corrosion paints based on novel water-based self-crosslinking acrylate latexes containing appropriate pigments and ZnO or MgO nanoparticles at a concentration of 1.5 % (with respect to the monomers) compared to the same systems free from the nanoparticles. Both the effect of the MeO nanoparticles and the effects of the pigment species and particle shapes on the paint film properties were examined. The MeO nanoparticles were found to improve all the properties tested. The latexes with MgO exhibited the highest resistance to flash corrosion while the latexes with ZnO exhibited the highest anticorrosion resistance. Furthermore, the systems with the calcium-aluminium polyphosphosilicate based pigment were superior to all the remaining systems in this respect. It is concluded that binders with nanoparticles can be used as a basis for anticorrosion coatings provided that a suitable pigment is selected.

scholarly journals Preparation and Self-Repairing Properties of MF-Coated Shellac Water-Based Microcapsules

Coatings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 778 ◽  
Author(s):  
Yijuan Chang ◽  
Xiaoxing Yan
Keyword(s):  
Orthogonal Experiment ◽  
Paint Film ◽  
Great Influence ◽  
Color Difference ◽  
Core Material ◽  
Wall Material ◽  
Formaldehyde Resin ◽  
Stirring Rate ◽  
Water Based ◽  
Four Levels

A self-repairing microcapsule was prepared by emulsion polymerization using melamine formaldehyde resin (MF) as wall material, and a mixture of shellac solution and water-based coating as core material. The orthogonal experiment was carried out through five factors and four levels. The effects of Wcore:Wwall, Wemulsifier:Wcore, stirring rate, Wshellac:Wcoating, Wemulsifier solution:Wcore on the output and coverage rate of microcapsules were studied. The stirring rate has a great influence on the preparation process of the MF-coated shellac water-based microcapsules. When the Wcore:Wwall is 0.8:1, Wemulsifier:Wcore is 3:100, stirring rate is 600 rpm, Wshellac:Wcoating is 1:1, Wemulsifier solution:Wcore is 9:1, the prepared microcapsules have the best shape and size. With the increase in concentration of microcapsules, the color difference and gloss of paint film decreased gradually. The tensile strength, scanning electron microscopy (SEM), infrared spectroscopy and repair effects of the paint film were analyzed. When the concentration of microcapsules was 5.0–10.0%, the comprehensive performance of the paint film was better, providing a technical reference for the self-repairing coatings.

scholarly journals Preparation and Optimization of Waterborne Acrylic Core Microcapsules for Waterborne Wood Coatings and Comparison with Epoxy Resin Core

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2366 ◽  
Author(s):  
Xiaoxing Yan ◽  
Yu Tao ◽  
Xingyu Qian
Keyword(s):  
In Situ Polymerization ◽  
Urea Formaldehyde ◽  
Paint Film ◽  
Bath Temperature ◽  
Water Bath ◽  
Core Material ◽  
Wall Material ◽  
Formaldehyde Resin ◽  
The Core ◽  
Resin Core

Microcapsules were prepared by in situ polymerization with urea formaldehyde resin as the wall material and Dulux waterborne acrylic acid as the core material. The effects of the core–wall ratio, water bath temperature and depositing time on the morphology, particle size, yield and encapsulation ratio of microcapsules were investigated by orthogonal experiment of three factors and two levels. The results showed that the core–wall ratio had the greatest influence on the performance of microcapsules. When the core–wall ratio was 0.58:1, the water bath temperature was 70 °C, and the depositing time was 5 d, the microcapsule performance was the best. With the increase in depositing time, the yield of microcapsule particles increased gradually, and the microcapsules appeared to show an adhesive phenomenon. However, the long-term depositing time did not lead to complete deposition and agglomeration of microcapsules. When 10.0% concentration of the waterborne acrylic microcapsules with 0.58:1 of core–wall ratio was added to the coatings, the mechanical and optical properties of the coatings did not decrease significantly, but the elongation at break increased significantly. Therefore, this study offers a new prospect for using waterborne acrylic microcapsules to improve the toughness of waterborne paint film which can be cured at room temperature on a wood surface.

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.

Investigations of the drying process of a water based paint film for automotive applications

2011 ◽  
Vol 50 (5-6) ◽  
pp. 495-502 ◽  
Author(s):  
J. Domnick ◽  
D. Gruseck ◽  
K. Pulli ◽  
A. Scheibe ◽  
Q. Ye ◽  
...  
Keyword(s):  
Paint Film ◽  
Automotive Applications ◽  
Drying Process ◽  
Water Based

Surface modification of nano-alumina and its application in preparing polyacrylate water-based wood coating

2013 ◽  
Vol 33 (8) ◽  
pp. 767-774 ◽  
Author(s):  
Ling Long ◽  
Jianfeng Xu ◽  
Xianglong Wan ◽  
Lei Qian
Keyword(s):  
Surface Modification ◽  
Abrasion Resistance ◽  
High Performance ◽  
Ionic Surfactant ◽  
Coating Film ◽  
Wood Coating ◽  
Nano Alumina ◽  
Water Based ◽  
Mixing Method ◽  
Modified Surface

Abstract In order to solve weakness, undesirable abrasion resistance, and hardness of a water-based wood coating film, modified surface nano-alumina was made in the water-based wood coating. The effect of surfactant type and amount on the performance of nano-alumina slurry was investigated. How the performance of the polyacrylate wood coating was affected by the size, amount, and mixing method of nano slurry was studied, as well as the characterization of nano-alumina slurry and modified polyacrylate wood coating. The results showed that, by compounding the non-ionic surfactant polyoxyethylene octylphenol ether (OPEO) and anionic surfactant sodium polyacrylate of surface modification of nano-alumina, the nano-alumina slurry had excellent performance and good stability when the amount of nano-alumina was 0.6 wt% and 3.2 wt%, respectively. When 1.5 wt% of nano slurry was mixed with the water-based polyacrylate emulsion to a hybrid during the pre-emulsification phase, the wood coating film had high performance, and good abrasion resistance and hardness.

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