Water-based polyurethane materials usher in the east wind

coating raw materials and equipment network:
November 13, the Ministry of Industry and Information Technology issued "wood coatings in the limit of harmful substances" and other 8 chemical industry mandatory national standards for approval. The new national standard will put forward higher requirements for VOCs emissions in polyurethane coatings, adhesives and other industries. At the 5th Water Polyurethane Scientific Research and Technology Exchange Conference hosted by China Polyurethane Industry Association, Water Materials Commission and Osja Materials Technology (Shanghai) Co., Ltd. on November 13-15, industry experts believe that polyurethane hydration will usher in the east wind as the country's environmental requirements such as VOC emissions continue to improve.Wang Wusheng, a professor at Anhui University in Anhui Province, said that china's water-based polyurethane in the polyurethane industry accounted for a small proportion, in 2018 China's polyurethane production of about 11 million tons (pure solid content), water-based polyurethane production of about 100,000 tons, of which 30,000 tons of pure solid content. However, water-based polyurethane is a very important product. In recent years, due to the improvement of environmental protection requirements and awareness, China's water-based polyurethane industry has developed rapidly, the growth rate is far greater than the polyurethane industry as a whole. From the initial leather coating, to textile coatings, synthetic pulp, wood coatings, industrial coatings, automotive coatings, polyurethane condoms, water-based polyurethane applications continue to expand, the level of technology continues to improve.environmental regulations have opened up new space for the development of water-based polyurethane materials. In order to implement the Notice of the State Council on the Issue of the Three-Year Action Plan to Win the Blue Sky Defense War, the Ministry of Ecological Environment issued the Comprehensive Management Plan for Volatile Organic Matters in Key Industries in July this year, which clearly proposes to strengthen the comprehensive management of VOCs for industrial coating, said Sasha, project leader of the Environmental Engineering Assessment Center of the Ministry of Environmental Protection. To strengthen source control, speed up the use of water-based low VOCs content of coatings to replace solvent-based coatings, including automobile manufacturing, steel containers, wood furniture, construction machinery, electronic products manufacturing coatings, soft furniture water-based adhesives.reporters note that the Ministry of Industry and Information Technology issued eight mandatory national standards for the chemical industry approval publicity, "adhesive volatile organic compounds limit" "industrial protective coatings in the limit of harmful substances" "building wall coatings in the limit of harmful substances" "wood coatings in the limit of harmful substances" "vehicle coatings in the limit of harmful substances" 5 standards are related to the polyurethane industry. "These mandatory standards are not far from being formally implemented. These initiatives are also aimed at further limiting VOCs emissions from the chemical industry and will also open up new development opportunities for polyurethane water-based materials. Han Baole, deputy secretary-general of the China Polyurethane Industry Association, said.Yanjun, deputy director of the water-based materials committee of the Polyurethane Association, said that there are many types of polyurethane hydration products, including adhesives, coatings, leather resins. With the introduction of mandatory standards, there will be a number of enterprises facing transformation and upgrading. Take paint enterprises as an example, it is estimated that 70%-80% of enterprises can meet the new national standards to be implemented, and 20%-30% of enterprises are not up to standard, must be water-based and other environmental protection upgrades to meet policy requirements., the current development of water-based polyurethane also faces some technical problems that need to be solved urgently. Zhang Haoming, vice chairman of China Polyurethane Industry Association, director of the water-based special committee and chairman of Osca Materials Technology (Shanghai) Co., Ltd., believes that most water-based polyurethane dispersion production processes still use solvents, resulting in solvent recycling problems. How to reduce the amount of organic solvents through the research and development of new synthesis processes and raw materials, and finally achieve solvent-free green production, is an important research topic in the development of water-based polyurethane materials."In the water-based polyurethane synthesis process, solvents are used to help dissolve reactants, reduce pre-polymer viscosity, and help disperse. Water-based polyurethane synthesis requires high solvent performance, solvent must be inert, and water-soluble, the reaction material and products have a good solubility capacity, and boiling point should also be within a certain range. At present, water-based polyurethane synthesis needs to use acetone and other solvents, these are flammable and explosive dangerous goods, in the production and transportation process by a lot of constraints, so it is urgent to develop new non-toxic safety solvents. Wang Wusheng explained.Wusheng also suggested that water-based polyurethanes, although low VOC emissions during application, tend to produce more exhaust gases and slags in the synthesis and use process than solvent-based products. How to reduce the "three waste" emissions is also an important issue in front of the water-based polyurethane industry.four major water-based resin epoxy, acrylic, aolic acid, polyurethane performance can be said to have some advantages, but the proportion of application is still low. "In fact, China's water-based polyurethane material research time is relatively long, there are many good technology. At present, the main problem is the lack of high-end raw materials. For example, water-based materials required high-end curing agents, special polyols, fatty isocyanate and other raw materials, due to high technical threshold, many are foreign patented technology, restricting the development of the industry. Downstream application this we because the market is very large, so the development is very fast, but the current lack of Chinese brands. Most of our polyurethane brands are concentrated upstream. "In the view of Wu Haiping, a professor at Anhui University, to improve the level of development of the water-based polyurethane industry, it is necessary to have two hair forces, upstream and downstream co-development."The industry needs to further conduct more basic research on the film-forming mechanism of water-based polyurethane dispersions and improve the corresponding supporting systems, including equipment and additives." Zhang Haoming said. He hoped that the water-based committee of the Polyurethane Association would build a high-quality communication platform from material research and development to user use, and promote the healthy development of the water-based polyurethane industry.reporter learned that Cosco, Wanhua Chemical, Hensmay and other industries leading polyurethane enterprises, long-term focus on water-based polyurethane materials research and development, is committed to providing more environmentally friendly, sustainable solutions. Cosco offers a wide range of solutions such as high-performance polyurethane water-based shoe adhesives and water-based PP-bottom coatings. In terms of raw materials, Wanhua developed a new isocyanate monolith XDI/H6XDI reaction activity is higher, the unique molecular structure can give water-based resins better performance and better heat resistance.: Part of the content of this article from the network, we have indicated the source, copyright owned by the original author! 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