The development of epoxy primer for color coated plate With the rapid development of color plate industry, the development of high-performance color plate coatings to meet the needs of advanced and diversified products has become a research hotspot at home and abroad. A primer with good adhesion, flexibility and compatibility with the top coat must be prepared to improve the performance of the color coating. However, because the variety and quality of domestic coil coatings lag behind that of foreign products, Chinese manufacturers have to use high price imported coatings when producing color plates, which has greatly affected the development of color plate industry in China [1-2]. Due to many factors, the formulation of primer is a complex process. In this paper, the influence of various factors on the performance of epoxy primer is determined by orthogonal test, so that the optimal formula can be reasonably determined with less steps, and the obtained paint film has obvious advantages such as hardness and solvent resistance, And adhesion. The performance is also excellent.
The steel structure is very large, especially the green building system of steel structure, which will break the boundaries of real estate, construction, mechanical equipment manufacturing, green building, new building materials, disaster prevention and reduction, home appliance kitchen decoration and other industries, and become a new one. Industrial system of circular industrialization; Real estate funds can return to the modern economy and other real economies to achieve economic transformation and upgrading. In the long run, it is an emerging industry of national strategic resource reserve, which can hide steel in buildings to save wealth, benefit people and future generations. Therefore, in recent years, China's steel structure and residential buildings continue to develop. According to preliminary statistics, more than 10 million square meters of steel structure houses have been developed or constructed in Beijing, Tianjin, Shanghai, Zhejiang, Hubei, Inner Mongolia and other provinces and cities. A large number of world-class steel structure buildings, such as the Water Cube, the new CCTV office building, and the Shanghai Global Center, have become the application model projects of steel structure construction in China. Therefore, the steel used in the steel structure manufacturing industry is of large quantity, high quality and many varieties. There are ordinary steel, high-quality steel and special steel. Among them, U-shaped steel accounts for a large proportion, especially low-alloy high-strength steel, weathering steel, fire-resistant steel, ultra-high strength bolts, high-performance color coated steel plates, high-grade alloy plates, etc., and their demand is increasing. Recently, the National Development and Reform Commission and the Ministry of Housing and Urban Rural Development proposed to build 1 billion square meters of green buildings during the "12th Five Year Plan" period. By the end of 2015, 20% of new town construction projects had met the requirements of green building standards. Among them, steel structure is becoming one of the development directions of green buildings. The Ministry of Housing and Urban Rural Development's Twelfth Five Year Development Plan for the Construction Industry requires that the energy consumption per unit added value of construction products will decrease by 10% during the Twelfth Five Year Plan period, and the concrete consumption above C60 will reach 10% of the total consumption. A total of 45% is used, and the proportion of steel structure engineering is increased. In this regard, some analysts predict that by the end of the "Twelfth Five Year Plan", China's steel structure output will reach 50 million to 65 million tons, and the overall industry prospects are good. According to this goal, iron and steel enterprises should further improve the quality of steel used for steel structures, increase the development and application of varieties, increase the varieties of structural high-performance steel and connecting materials, and expand the production of economic profiles. Thin wall H-shaped steel. Improve the product and application scale of steel products for building structures; Promote the application of weathering steel, fire-resistant steel, color coated steel and other steels; We will develop ultra-high strength bolts, high-performance color coated steel plates, high-grade alloy plates, etc., and strive to basically localize the steel used for steel structure construction in China. Industry insiders remind steel enterprises that with the increasing emphasis on environmental protection, green energy-saving buildings will become the focus of future urban construction. Driven by urbanization, the market scale of green steel structure buildings will be very large. It is estimated that the huge market of more than one trillion yuan is accelerating. For iron and steel enterprises, changing their ideas and entering the steel structure industry is a new way to achieve transformation and development. The government and steel enterprises should pay more attention to the steel structure industry.