Summary of Issue 7 of the Coatings Industry 2019 (I.)

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1, nano-zinc oxide as a light-inducing agent of water-based photo-cured polyurethane varnish and paint film performance research
abstract: In order to eliminate the organic light trigger in the light solution of small molecular pollutants, prepared nano-zinc oxide, and synthesized water-based polyurethane acrylic, according to a certain proportion, nano-zinc oxide as a light-inducing agent, made inorganic nano-light-inducing paint. Tests such as infrared spectrometers, ultraviolet visible spectrophotometers, X-ray diffraction meters, Malvern granular meters, transmission electron microscopes, thermal weight analyzers, scanning electron microscopes were used to analyze nano-zinc oxide and water-based photo-cured polyurethane acrylics At the same time, the physical properties of the lacquer film were studied, and when the addition of nano-zinc oxide was 1%, the hardness of the photo-cured paint film was H, the adhesion was 0, the gloss was about 90, the water resistance was good, the alkali resistance was good, and the alcohol resistance was excellent. It is shown that nano-zinc oxide can be used instead of organic light trigger for water-based photo-cured polyurethane acrylic to synthesize more environmentally friendly and better water-based photo-curing

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keywords: nano-zinc oxide; polyurethane acrylic; water-based photo-curing coatings; light-triggers
Feng Qin 1, Feng Jun 2, Ye Daiyong x 2 (1. Jiabaoli Chemical Group Co., Ltd., Jiangmen, Guangdong 529085;2 South China University of Technology School of Chemistry and Chemical Engineering, Guangzhou 510640)
2, the effect of ion polymers on Rodaming B fluorescent luminescence behavior
Abstract: Traditional fluorescent molecules due to the aggregation induced annihilation effect, fluorescence in high concentration or solid state disappeared, limiting its practical application. In order to overcome this defect, the synthesis of acrylic-based ion polymers and rodamin B fluorescent molecules in-place doped into the polymer system. Using the charge effect between ions and fluorescent molecules in the polymer chain segment to inhibit the accumulation of fluorescent molecules in the system, the fluorescent resins with different Rodamine B doping amounts and different glassy temperatures were designed and synthesized, and the effects of Rodamin B doping amount, glass temperature, polymer mass concentration, different solvents and ambient temperature on fluorescent resin performance were discussed. The results show that by the attraction of charge, the adsorption and barrier of polymer chain segment can promote the effective dispersion of fluorescent molecules, so as to achieve the effective luminousness of curing coating film.
keywords: Rodaming B; ion polymer; aggregation induced annihilation; fluorescence; responsiveness
Xie Yixiao 1, Wang Yong 1, Wang Lin 1, Wang Jun 1, Ji Fuhua 2, Xu Zexiao 2, Chen Xiangnan 2, Wang Zhongwei 2, Li Zhili x1 (1. Jiangsu University of Science and Technology School of Materials Science and Engineering, Zhenjiang, Jiangsu 212003; 2. Suzhou Ji people high-tech materials Co., Ltd., Suzhou, Jiangsu 215143
3, translucent expansion flame retardant coating flame retardant and smoke-suppressing research
Abstract: melamine formaldehyde resin (MF) as the base, phenylphosphate (PPOA), new pyrethroid Alcohol (NPG), N, N-dmimide (DMF) prepares transparent expansion flame retardant coatings for expansion flame retardants (IFRs) and further improves the performance of the coating by adding polyglycol (PEG). The flame retardant, smoke volume and thermal stability of the coating were studied using the Extreme Oxygen Index (LOI) test, the building material smoke density test and the thermal weight analyzer (TG), and the carbon layer deformity of the coating was observed using a scanning electron microscope (SEM). The results show that IFR can significantly improve the flame retardant and smoke suppression properties of pure MF, and on this basis, adding PEG can further improve the flame retardant and smoke suppression capability of the coating. When IFR and PEG are added by 40% and 5% respectively, the paint has the best flame retardant and smoke suppression, its LOI value reaches 27.4%, the smoke density level is 27.15, and the addition ratio can make the coating in the combustion process has a better expansion capacity into carbon.
keywords: flame retardant coatings; flame retardant; smoke suppression; thermal stability; polyethyl glycol
Han Chao, Dong Xiang,, Yan Shichao, Kingdee, Kong Fuxuan, Yu Shibin (Anhui University of Technology School of Energy and Safety, Huainan, Anhui Province) 232000)
Process Technology
4, preparation and signation of oil-based polyurethane
Summary: To simplify the purification process of oil-based alcohols, preparation of high-quality oil-based polyurethane. Methyl acetate (ME) was synthesized through the first ester exchange reaction of arginol and methanol, and the oil-based polyurethane (TOBP) was prepared with TOBA as raw material and isofone isocyanate as raw material. The structure and performance of the product are indicated by Fourier Transform Infrared Spectrometer (FT-IR) and Thermal Weight Analyzer (TGA). The results show that the synthetic substance is the target product, the content of the oil-based alcohol is increased, the heat resistance, water resistance and hardness of the curing film are improved, the stretch strength is increased and the fracture elongation rate is reduced, and the preparation of the oil-based polyurethane solution meets the requirements of the national standard of general-purpose primer in the solvent-based polyurethane wood coating for interior decoration.
keywords: oil-based alcohol; isofrone isocyanate; oil-based polyurethane; ester exchange
Ge Yi, Huang Bin, Wu Zhongdong, Long Hongxu, Yang Yan, Liao Youwei( Central South Forestry University of Science and Technology, Materials Table Interface Science and Technology Hunan Province Key Laboratory, Changsha 410) 004)
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