The current situation and development trend of the

Current situation and development trend of green automotive coatings

due to the enhancement of awareness of health and environmental protection, the improvement of environmental protection technology, and the demand from customers, the development of water-based automotive coatings system is rapid, especially the intermediate coating and basecoat. Water based touch up paint has also been applied at the request of some customers. Paint and ink specially interviewed experts in the industry to express their views on the development status, development trend, new products and relevant laws and regulations of waterborne vehicle coatings

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◆ development status

ppg automotive paint Asia Pacific product management and market development director Mr. Lou Yigao said: "From the perspective of customers, water-based intermediate coat and color paint have been used in China since 4 or 5 years ago. Although there are no specific requirements in relevant national laws and regulations, in fact, many manufacturers have introduced environmental friendly intermediate coat and color paint in the project initiation and approval of new projects, or reserved work stations. Once the national environmental protection laws and regulations are implemented, the equipment, process and location can be changed to meet the requirements of new water-based technologies. Therefore, the The introduction of relevant regulations and policies will be the main driving force for the development of water-based intermediate coat and color paint in China; In terms of suppliers, most of them provide water-based technology. PPG technology is adopted in the water-based intermediate coating production line of Beijing Benz. In terms of water-based color paint, PPG technology has been adopted in 7 production lines in China, including port factories of Mercedes Benz, general motors, JAC, Hyundai and SAIC. Among them, the three production lines invested and built by General Motors in the last four years are water-based color paint, including Yantai, Shanghai Jinqiao South plant and Shenyang plant. "

fanjingfei, senior coating manager of Shanghai General Motors Co., Ltd., said: "Since 2004, Shanghai GM started to use water-based intermediate coating and basecoat in Jinqiao South plant, and later Dongyue II and Beisheng II. In addition, there should be no doubt that the conversion to water-based paint has the advantage of environmental protection, and the innovation ability of China's new material industry is even more stretched. The appearance is better and the technical upgrading is easier to synchronize with foreign countries. Compared with the past, the current water-based paint still contains about 10% solvent, but the previous solvent content basecoat At 70%, so it has been a great progress. "

talking about the development status of varnish, Mr. Lou Yigao said: "At present, the varnish is still dominated by solvent. In 2000, about 3~5% of the world tried water-based varnish and 5~8% tried powder varnish. However, the further development of water-based varnish and powder varnish is limited due to the coating equipment, construction method, construction process, appearance effect, etc. PPG has a nano ceramic varnish ceramiclear, which is the world's first automotive varnish using nanotechnology, with wear resistance, scratch resistance and resistance Bird droppings, acid rain and infusion. Due to the high cost and complex construction process of nano varnish, it is only used in some high-end luxury cars. If the production lines of these luxury cars are also produced in China, it is expected that the varnish will also enter the Chinese market. "

Mr. Lijian, chief electrophoresis expert of Hunan Xiangjiang Guanxi coating company, said: "in terms of automotive finish, the hydration of varnish is still in the research stage, and there is no application performance in China for the time being; intermediate coat and base (metallic paint) The development of water-based technology is faster than that of high-end equipment such as aluminum research and development. Although the equipment investment is increased and the material price is high, the domestic application is expanding; Guangzhou Toyota and Dongfeng Honda all use water-based topcoat; Guangzhou Honda, GM and domestic JAC all have production lines for water-based topcoats (solvent based lines are also available); At present, the research and application of the hydration of automotive topcoat is the hot spot of various paint manufacturers and automobile factories; From the technical level, the application of domestic waterborne automotive paint is the most advanced technology synchronized internationally. "

Mr. huxinyi, chief technologist of Dongfeng Motor Group, said: "Water based coatings have been popularized rapidly in domestic automobile factories in recent years, and most newly established factories use water-based coatings. However, from the perspective of implementation, some domestic factories, such as Dongfeng Honda, have done relatively thorough work, and the whole production line, equipment, primer and intermediate coating all use water-based coatings; while some factories have relatively poor strength, because of the investment problem, the implementation is not very thorough, and there are some problems in the use of water-based coatings reserve. From the perspective of input cost, the equipment cost of water-based coatings is higher than that of previous solvent based coatings, which is one aspect; On the other hand, from the perspective of materials, that is, coatings, the cost of water-based coatings has been tested. The chuck seat is wedge-shaped, which is close to the previous solvent coatings (it was about 20% higher in the past); On the other hand, from the perspective of energy consumption when P increases to 7kn, that is, from the perspective of operation, the water-based coating is still relatively high, because the process window of the water-based coating is relatively narrow and the requirements for humidity and temperature are high, so the equipment investment is high. In terms of national policies, at present, the state only advocates the use of environmentally friendly water-based coatings, and there are no hard and fast regulations. As a matter of fact, the state assesses the coating by grade. If water-based coatings are used in the EIA of new factories, the EIA will be easier to pass. "

note: the reprinted contents are indicated with the source. The reprint is for the purpose of transmitting more information, and does not mean to agree with their views or confirm the authenticity of their contents