Summary of Issue 11 of 2019 "Coating Industry" (I)

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1, anti-fouling agent zinc pyridolytic, photodegradation and degradation product toxicity study
abstract: study the marine anti-fouling coating additive zinc pyridoxine (ZPT) under different environmental conditions of hydrolytic, photochemical degradation, to assess its possible risks to freshwater and marine ecological environment. Based on the organic pollutant hydrolyzing and photolytic experimental methods of the American Society for Materials and Testing (ASTM), the residual concentration of ZPT in hydrolysates and photolytes under different conditions and the growth inhibition toxicity of duchlor algae were tested. It is found that partial alkaline pH (9.0) is beneficial to ZPT hydrolysing and photolyzing, while saline water (ASW) is not conducive to ZPT hydrolyzing but is beneficial to the

. Degradation fluid toxicity in freshwater environment is mainly contributed by residual ZPT, while degradation fluid toxicity in seawater environment is significantly higher than that of residual ZPT. Therefore, ZPT, as an additive for marine anti-fouling coatings, needs further attention to the toxicity risk to the marine environment.
Zhao Wei 1, Ping Double 1, Ding Cheng Cheng 1, Qian Cheng 1, Yu Cuili 1,2, Zhou Xiaoxuan x2 (1. Yangzhou University School of Environmental Science and Engineering, Yangzhou, Jiangsu 225127; 2. Yangzhou University Institute of Marine Science and Technology, Jiangsu Yangzhou 225127)
227) Sol-gel coating sealing holes on micro-arc oxide surfaces and corrosion resistance research
Abstract: Using the photochemical process of ultraviolet-assisted sol-gels, a layer of sealing layer is applied to the surface of aluminum alloy fibers with micro-arc oxidation, and the sealing layer can effectively close the porous micro-arc oxide film, significantly improving the corrosion resistance of aluminum alloy fibers. Electrochemical analysis of aluminum alloy fibers after micro-arc oxidation and sealing holes showed that the corrosion level of aluminum alloy fibers after sealing holes was moving from -0.651 V to -0.368 V. Corrosion current density Icorr reduced from 6.02×10-6 A/cm2 to 9.58×10-10 A/cm2, polarized resistance Rp from 5.4× Ω 103 Ω.cm2 increased to 4.5×104 Ω.cm2, the corrosion rate of UV-treated sealing film layer was significantly reduced, and the corrosion resistance of aluminum fibers was significantly improved.
Qiu Ning 1, Yang Guoliang 2, Wang Zhenfang 3, Chen Yiping 4, Jin Xiaofeng 4, Chen Xin 5
(1. State Grid Co., Ltd., Beijing 100031; 2. State Grid Beijing Electric Power Bureau, Beijing 100031 3. State Grid Henan Electric Power Company, Zhengzhou 450052; 4. State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310007; 5. Global Energy Internet Research Institute Co., Ltd., Beijing 102211)
3, fine emulsion polymerization legal system containing fluororopyl propylene Study of acrylic co-polymer emulsion
Abstract: Fluoroacrylate co-polymer (FPA) emulsion is prepared by fine emulsion polymerization, using infrared spectroscopy (FT-IR), transmission mirror (TEM), atomic force microscope (AFM) The polymer is characterized by thermal heavy analyzer (TG), scanning electroscope and surface energy spectrum (SEM-EDS), and the quantity ratio of emulsifier to emulsifier is examined, and the effect of fluorine monomer dosage and ultrasonic time on emulsion particle size is examined. The results showed that the three monomers of methyl acrylates (6FA), acrylates (BA) and styrene (St) were successfully polymerized, and the ratio of emulsizers to emulsizers was 1.5:1, and the ultrasound time was 60min. When the fluorine monosome is 10%, the emulsion particle size is the smallest and the distribution is narrow, the surface temperature is reduced from 45.028mN/m to 33.399mN/m, and the latex film roughness is increased and the thermal stability is improved.
Xinhua, Liu Jianfang, Zhang Hui, Bai Jian zhuang (Shanxi University of Science and Technology Ministry of Education Light Chemical Additive Chemistry and Technology Key Laboratory, Xi'an, Shaanxi 710021)
Process Technology
4, multi-arm cashew phenol-based photosensitive resin synthesis and performance research
abstract: design and synthesis of a new type of multi-arm cashew phenol-based photosensitive resin. First of all, using hydroxyethyl cashew phenol ether (HCE) and high methyl etherized melamine formaldehyde resin (HMMM) as raw materials, the ether exchange reaction was used to synthesize a pre-polymer (HF) with a "hard core soft arm" structure. Acrylic acidification of HF was carried out by one-step reaction, and a multi-arm cashew phenol-based photosensitive acrylic resin (AHF) was synthesized. The HF and AHF structures were indicated by Fourier Transform Infrared Spectrometer (FT-IR) and Nuclear Magnetic Resonance Spectrometer (NMR), and the results showed that photosensitive resins were successfully synthesized. Since then, the photo-curing coating has been prepared using the synthetic resin AHF, and the effects of adhesive promoter content on the hardness, adhesion, pencil hardness and impact resistance of the coating rod have been studied, and the commercialized acrylic-biphenol A epoxypropylate (RY1104), amino acrylates (P170A), polyurethane acrylic The results of ester (6001), soybean oil epoxy acrylates (AESO) show that: compared with several commercialized resins, light curing coatings prepared with AHF as the base resin and 5% adhesion promoter, pencil hardness of up to 3H, excellent gloss, adhesion and impact resistance, and strong tensile strength and high fracture elongation.
Wu Zhijun, Chen Zeyu, Yan Man, Chen Mengjia, Meng Yuxuan, Liu Jingcheng, Liu Ren
(Jiangnan University School of Chemistry and Materials Engineering, Department of Synthesis and Biocolloids Ministry of Education Key Laboratory, Wuxi, Jiangsu 214122)
5, high refractive index TiO2 nano-hybrid material preparation and performance research
Summary: 1,2-ethylene ethylene, tetlucophenol oxycodrome And 9,9-ii (2,3-epoxy-based) benzene-based as raw material, LiOH methanol solution as a catalyst, using -based-epoxy click chemical reaction to prepare polymer substrates containing S and Br elements; Its structure and performance are indicated by instruments such as infrared spectrometer, nanoparticle meter, elliptical polarization spectrometer, transmission electron microscope and ultraviolet-visible spectrogram meter. The results show that TiO2 particles are successfully synthesized in polymer substations and evenly dispersed at the nanoscale, and the material has a high transmission rate in the visible light region, mostly around 95%, and with the increase of TiO2 particle hybridization, the refractive index at 486nm increased from 1.660 2 to 1.756 5, and the number of abs increased from 21.65 to 34.63.
Hu Xucan, Yao Bolong, Liu Jiacheng, Chen Kun, Liu Jing, Li Chengdong
(Gangnam University School of Chemistry and Materials Engineering, Wuxi, Jiangsu 214122)
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