It is understood that UV-curable coatings do not contain any organic solvents or inert diluents compared to conventional coatings. They do not require heating when cured. They have less environmental pollution, low energy consumption, high efficiency, good chemical stability and good applicability. It is a high-efficiency, energy-saving and environmentally-friendly modern coating that has been widely used in various fields. With the development and application of various photosensitive coatings, one of the keys to the design of UV-curable coatings is how to improve their adhesion to various substrates, because good adhesion is the film's good processing properties, medium resistance and The premise of outdoor weather resistance. Therefore, how to improve the properties of the coating film by improving the adhesion of the coating is a matter of concern to us all. In general, adhesion is improved by adding various powder coating adhesion promoters. Appropriate adhesion promoter is used to enhance the effective contact between the coating film and the substrate, and the adhesion promoter with reactive functional groups can form a strong chemical bond with the surface of the substrate to obtain good adhesion and comprehensive performance. Since the accelerator obtained in the present study is a composite product having a CC monofunctional group and a bifunctional group, it is possible to better cope with problems such as volume shrinkage and shrinkage internal stress at the time of photocuring. In order to solve the problem of poor adhesion of UV-curable coatings, hydroxyethyl acrylate or hydroxyethyl methacrylate and phosphorus pentoxide are used as raw materials to carry out electrophilic addition reaction under certain conditions to obtain UV-curable phosphoric acid. A powder coating adhesion promoter for the group. The total reaction time was determined to be 3.5 h using an acid value tracking test. Infrared spectroscopy analysis of the product indicated that the hydroxyl groups in the reaction had completely reacted and the formation of the phosphoric acid group and the CC double bond in the product. Comparing the performance of homemade products and commercially available products on different plates, the results show that these two products have a good adhesion promoting effect on UV-curable coatings and polar substrates such as metal, glass and wood, and have established self-made The advantages of the product. [Follow the WeChat public number "Jiuzheng Coating Network"; pay attention to surprises, scan code to view "If your husband is selling paint..." Jiuzheng Coating Network Exchange Group]
Activated Carbon is a very small carbon particle with a large surface area, and there are even smaller holes in the carbon particle-capillary. This capillary has a strong adsorption capacity, because of the large surface area of the carbon particles, it can be in full contact with gas(impurities). When these gases(impurities) touch the capillary, they are adsorbed and act as purifiers. The study of the surface area of activated carbon is very important. The detection data of the specific surface area of activated carbon is only true and reliable by using the BET method. At present, there are many instruments in China that can only be detected by direct comparison methods. Now it is also in China. It was eliminated. At present, multi-point BET method is used for specific surface area testing at home and abroad. The specific surface area measurement standards formulated at home and abroad are based on BET test methods. See the Chinese National Standard(GB/T 19587-2004)-BET principle for the determination of the surface area of solid substances. The specific surface area detection is actually a more time-consuming task. Due to the different adsorption capabilities of samples, the testing of some samples may take a whole day. If the test process is not fully automated, the testers can not leave at all times. And to be highly focused, observe the dashboard, control the knob, and inadvertently lead to the failure of the test process, which will waste a lot of valuable time for the tester. The F-Sorb 2400 ratio surface area tester is an instrument that can truly achieve the BET method detection function(with a direct comparison method). The more important F-Sorb 2400 ratio surface area tester is the only fully automated and intelligent surface area detection device in China so far., Its test results are highly consistent with international standards and have good stability. At the same time, it reduces human error and improves the accuracy of test results.
Adsorption Activated Carbon,Dry Activated Carbon Desiccant,Graphite Particles Carbon Agent,Capacit Granular Activated Carbon NINGXIA SINOTOPSKY INTERNATIONAL TRADING CO.,LTD. , https://www.nxsinotopsky.com
How to solve the problem of adhesion of UV-curable coatings
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