Car varnish, the icing on the cake is more and more fresh

Car varnish refers to a coating used on top of color paint in vehicles such as automobiles, which not only improves the appearance of the face value, such as gloss, freshness, smoothness, but also provides additional functionality, such as chemical resistance, adhesion resistance and scratch resistance.
current automotive varnish applications, the mainstream is solvent-based systems (solvent types vary); With the rapid growth of China's automotive market and the acceleration of its environmental protection development, the development of automotive varnish also reflects the corresponding trend, specifically mainly concentrated in:
to reduce the baking
/ curing time and temperature;
UV curing varnish technology (rapid curing, reduction of VOC emissions);
maintains high gloss (glass appearance) while improving corrosion and scratch
resistance

applies nanosilica particles to improve scratch resistance, impact resistance and resistance to water vapor or gas performance,
self-healing varnish feasibility


To sum up, "high", "resistant" car varnish is becoming the trend: "high" - high solid content, high fullness, high freshness;
to meet these needs, Queton has introduced the corresponding varnish development solutions: Polyester silicone hybrid resins SILIKOTOP® E 900 and SILIKOTOP® E 901, silicone leveling agent TEGO® Flow 30 0 and TEGO® Glide 450, as well as easy-to-disperse air silicon AEROSIL® VP RS 92 and AEROSIL®VP RS 920; Appearance to function, all broken:
environmental protection solutions: high solid content, low VOC
SILIKOTOP® E 900/901 these two polyester silicone hybrid resin solid content of up to 90%, can be used for VOC Very low-content formulations (<250g/L);
they are suitable for high-solid coatings such as paint applications, both as the main resin and as auxiliary resins, because of their low molecular weight, which helps to improve construction solids, compared to ordinary high-solid polyester resins, With greater dilution and high solid content to provide lower viscosity, low VOC coatings can be designed with good operation.
appearance scheme: high plumpness and freshness
in the current market for cars and other means of transport functions, face value of a can not be less appeal, the decorative properties of lacquer film is becoming increasingly important. This is reflected not only in the brilliant and stylish colors, but also in the smooth as mirrors, shadow clear appearance, as well as "thick" high-grade texture, and these, rely on "gloss", "fullness", "smoothness" and "freshness" and other comprehensive indicators to measure the embodiment.
, gloss doesn't have to be said. Fullness is mainly related to construction solid content, resin curing speed, the choice of high solidity low adhesive resin, and curing speed is slower, fullness is usually better. SILIKOTOP® E 900/901 is this type of high-solid, low-adhesive resin that helps to improve the fullness of the paint film appearance.
is a comprehensive reflection of the decorative properties of the coating film, which is related to the smoothness and fullness of the coating surface, especially the smoothness.
good leveling and is a great helper for providing excellent smoothness and freshness. The leveling of automotive varnishes can be improved in general by means of surface control, i.e. using silicone or polyacrylate leveling agents such as TEGO® Glide 450 (silicone) and TEGO® Flow 300 (polyacrylates).
silicone leveling agent can adjust the surface pressure of the coating to a uniform and low level during drying, thus eliminating the difference in surface pressure in the paint film, inhibiting the formation of the Benaud vortex and promoting the leveling. Polyacrylate leveling agents rarely reduce surface stress, mainly by using the limited compatible with the system, gathered in the interface, preventing the paint film due to different surface pressure caused by the flow of materials, inhibit the phenomenon of uneven. It is worth noting here that neither TEGO ® Glide 450 nor TEGO ® Flow 300 will affect the recoding of the paint film.
Another way to improve flow leveling is to improve facade leveling through the fluid control effect of gas-phase silicon dioxide, the more recommended here is AEROSIL®VP RS 92, which is the market benchmark product AEROSIL® R 972 easy-to-disperse version, using a new production process, no grinding, just use a high-speed mixer, can achieve effective dispersion, can greatly simplify the production process, reduce production costs.
features: stone-resistant, viscous, scratch-resistant
functional aspects, SILIKOTOP® E 900/901 resin is also very "resistant": stone-resistant, Chemical resistance, weather resistance, etc., can be recommended below:
In addition, because it is silicone hybrid fat family hydroxyl polyester resin class, can help clean the smooth effect of silicone resin, help improve the varnish product adhesion resistance.
scratch-resistant series is aeroSIL® R 9200 and its dispersible version VPS 920. This special structurally modified gas phase silicon dioxide can significantly improve the scratch resistance of the coating. The easy-to-disperse version of VPS 920 simplifies the production process without grinding dispersion.
for automotive varnishes, high-solid resins, leveling agents and air silicones are recommended for automotive varnishes in terms of environmental protection, appearance and functionality as follows:
Source: Created Coating Additives