Performance and application of FEVE fluorocarbon resin coating

Fluorocarbon resin coatings, due to their special resin molecular structure, give them unique and superior properties, such as ultra-high weather resistance, low surface energy, excellent chemical resistance and corrosion resistance. In the field of outdoor building protection, fluorocarbon resin coatings with its excellent ultra-high weather resistance has become the first choice of high-end buildings, widely used in a variety of landmark buildings, large buildings, bridges, airports, stations outside decoration protection.
FEVE (VIN-vinyl ether) coatings as an important member of the fluorocarbon resin coating family, not only has the ultra-high weather resistance of fluorocarbon coatings, but also has the construction flexibility of traditional coatings, overcome the PVDF (polyfluoroethylene), PTFE (Teflon) and other fluorocarbon coatings construction limitations, at the same time, after ten years of promotion and application, in the domestic market has achieved good results and results, and developed technical standards

China.
FEVE fluorocarbon resin coating applications mainly outside the wall and steel structure, the external wall field market demand is huge, occupy a larger market share, especially in recent years the introduction of pre-coated plate, in-plant processing, on-site installation, processing speed, good quality, good decorative effect, to avoid the past due to FEVE fluorocarbon resin coating site construction conditions difficult to control, and bring the coating cracking, foaming, uneven color and other paint film ills. Pre-coated plates are installed in a variety of forms and can be installed and applied in an integrated way with the insulation layer. At present, FEVE fluorocarbon resin coating pre-coated plate is widely used in office buildings, hotels, airports, stations, schools, hospitals, high-end residential areas, such as the exterior wall decorative board, as well as subway, tunnels and other decorative board. In the production and manufacture of FEED fluorocarbon resin coating pre-coated plate, the early selection of spraying, now mostly using roller coating and gonorrhoe coating production process, production efficiency has been greatly improved. In addition, the rapid development of fluorocarbon pre-coated plate has also led to the production of substrates, coating equipment, installation and construction and other related industries.
in the field of corrosion protection of steel structures, FEVE fluorocarbon resin coatings have been highly evaluated and widely recognized by the market. Under the background of China's rapid economic growth, large-scale infrastructure construction has been started, FEVE fluorocarbon resin coatings in roads, railways, bridges, airports, stations and other large-scale projects in the steel structure protection applications have begun to popularize.
has grown steadily in the two main areas of exterior walls and steel construction, and the market demand for FEVE fluorocarbon coatings in other applications, such as metal (copper, aluminum, stainless steel), plastic (PVC, ABS, PET), ceramics, glass and stone, is also growing rapidly. Compared with traditional exterior wall and steel structure applications, FEVE fluorocarbon coatings are required for special applications on other substrates, called functional FEVE fluorocarbon coatings. Based on our understanding of FEVE fluorocarbon coatings in the marketing process, the application of some of these functional FEVE fluorocarbon coatings is briefly introduced.
1, baking TYPE fluorocarbon resin coating
baking type FEVE fluorocarbon resin coating has spraying and roller coating two construction methods.
mainly used in aluminum plate, aluminum profile, galvanized plate, stainless steel and other substrates. Crosslinking agent mainly to methyl etherized amino resin or closed isocyanate-based. China engaged in the application of this product research and promotion time is relatively long, the overall development is relatively stable. Early, China mainly in the field of spraying, with FEVE fluorocarbon resin coating instead of PVDF fluorocarbon coating, in addition to some performance characteristics relative to PVDF, but also mainly in terms of price cost, FEVE fluorocarbon resin coating has a greater advantage. However, the quality of FEVE fluorocarbon resin in China is uneven, some FEVE in the long-term weather resistance, especially after-processing adhesion, bending, impact and PVDF compared with there are significant differences. In recent years, with the large number of domestic PVDF fluorocarbon resin applications, originally dependent on imported PVDF resin costs greatly reduced, FEVE fluorocarbon coating cost price advantage can not be reflected, baking FEVE coating must improve its corresponding shortcomings, play its relative advantages, and PVDF fluorocarbon coatings form a good complement, in order to meet the different needs of the market. In the supporting coatings, the development of suitable matching primers and intermediate lacquer, improve the adaptability of the substrate, improve adhesion and flexibility, improve post-processing performance. Improve the construction of the paint, can adapt to a wider temperature range, and can be in a larger thickness range, will not lead to significant gloss differences. Improve the construction effect of metal flash paint, different anti-sink system, in the spray line has a great difference, need to combine the use of optimization options.
rolls are coated with FEVE fluorocarbon coatings, which, like spray systems, were developed early on as an alternative to PVDF fluorocarbon coatings, which provide higher hardness, gloss and decoration, as well as better price advantages. China's FEVE fluorocarbon resin is of course a price advantage, but in terms of flexibility is very different, can not meet the high requirements of aluminum plate demand, construction process is also relatively narrow, and there are certain hidden dangers, with the extension of storage time, there may be adhesion and T bend decline phenomenon, in terms of weather resistance and PVDF fluorocarbon coating differences are also obvious. Also with the domestic PVDF fluorocarbon resin a large number of applications, FEVE coil fluorocarbon coatings have no obvious price advantage, there is no good market recognition and a large number of applications. From a long-term perspective, the development of FEVE coil fluorocarbon coatings, must have a better FEVE fluorocarbon resin, to solve its weather resistance, flexibility, process and other aspects of the shortcomings, give full play to its hardness, especially high gloss, high decorative advantages, with PVDF coatings to better meet market needs. If FEVE coatings can be resistant to contamination, easy to clean the corresponding improvement and breakthrough, I believe there can be better prospects for development.
2, elastic fluorocarbon resin coatings
it is mainly used in the field of external walls, rubber and plastic packaging. China has not yet developed a special elastic fluorocarbon resin, in order to produce elastic fluorocarbon coatings in line with customer requirements, must be treated with appropriate modified treatment. Qualified elastic fluorocarbon coatings are not only elastic to meet the requirements, but also to ensure that they have good adhesion to the substrate, to ensure its excellent weather resistance and good construction, so as to achieve long-term use of the purpose.
3, high hardness fluorocarbon resin coatings
it is mainly used in hardness requirements of the field, such as tools, metal surfaces, interior wall panels, glass, ceramic surface coatings. Through the choice of curing agent, both variety and dosage, can not improve the hardness very well. By screening resins suitable for FEVE mixing, the results are not ideal under conditions that ensure fluorine content and weather resistance. By adding the right powder, the hardness can be significantly increased. The hardness of THEFEF coating can be increased to 4H.
4, anti-graffiti fluorocarbon resin coating
fluorine-containing materials have a very good water-repugnance oil-repugnance, such as for non-stick series of PTFE fluorocarbon coatings, low surface pressure, water-hate oil, can achieve a good anti-graffiti effect, and have a good self-cleaning. FEVE fluorocarbon resin can not achieve the equivalent effect, in order to meet the needs of anti-graffiti effect, must be introduced in the formulation of suitable additives, the current application is more silicon-containing additives.
long-term use requirements, additives should not only meet the requirements of anti-graffiti, but also have good weather resistance requirements. The surface gloss of the coating is also important, the surface rough gloss coating system, anti-graffiti effect will be greatly reduced, so as far as possible recommended medium-high gloss coating system.
5, plastic fluorocarbon resin coating
PVC-type plastic steel surface fluorocarbon coating, has been used in China for many years, formulation design, processing applications are relatively mature, and by professional manufacturers to develop automatic coating equipment. However, in many plastic steel manufacturers, due to the residual material of plastic steel surface is not uniform, will lead to surface shrink holes, serious will lead to decreased adhesion. This requires paint manufacturers to find suitable pre-treatment products, combined with coating manufacturers in the production process adjustment, to jointly solve such problems, in order to better meet market demand. China's northern use of colored plastic steel more, the northern winter outdoor temperature is lower (up to minus thirty or forty degrees), for the installation and use of low temperature impact requirements are higher, in order to better solve the problem, we need to find suitable glass temperature low modified resin, in order to achieve performance requirements.
for ABS and glass steel plastic substrates, the use of plastic steel with the same coating formulations and similar production processes, can be very good to meet the adhesion requirements, to meet the conventional protection and decoration requirements. For special application requirements, more experiments and explorations must be carried out on the relevant raw materials and processing processes.
For products that are difficult to adhere to in plastic substrates, you can use a multi-layer coating system, choose the right primer solution is relatively good, for products that require only one fluorocarbon paint, we must find a modified resin that can be mixed to solve the adhesion, while also taking into account its excellent weather resistance, chemical resistance.