UltraHighSolid single-coat-system for high-tech applications The 2C UltraHighSolid single-coat-system fulfils all requirements of high-tech applications. In addition, the coating system also allows for cost savings in production and logistics.

UltraHighSolid single-coat system Cost savings in production and logistics High requirements placed on coating systems Ever-increasing requirements are being placed on coating systems, whether they pertain to surface quality or the efficiency of the coating process. In addition, there are also VOC requirements, which are leading to the rising use of environmentally friendly water-borne coatings, powder coatings and high-solid systems. Users are looking for coating systems with an approx. 80 percent solids content by weight in order to safely stay below the VOC threshold of 420 g/l. These types...

Short cycle times Unlike standard multi-layer systems, the entire coating thickness can be applied in a single step using the during application new coating system. The elimination of intermediate flash-off time and the interim forced drying of the primer where necessary mean that cycle times for the coating can be significantly reduced. In addition, solvent savings - especially for cleaning purposes - can also be realised. The properties of the new EFDEDUR UHS single-layer coating UR1422 compared to a previous standard two-coat structure consisting of FREOPOX HighSolid-primer ER1980 or ER1912...

Controllable drying times Variable gloss levels The temperature range of 18 to 25 °C as well as a relative humidity of 40 to 70% have proven to be especially suitable application conditions. Application of the coating material should preferably be air-assisted. However, application can also be carried out using an airless process or by means of conventional air atomisation without any problem. Drying can take place at room temperature or be accelerated by increasing the temperature to up to 90 °C. The drying speed can be controlled by using different curing agents. It must noted, however, that...

This diagram shows that the same consistent gloss level is measured at a 60° angle, whereas the gloss level at a 20° angle is reduced as the drying speed becomes faster, i.e. haze increases. This equates to a reduction in gloss when drying is accelerated. The following diagram shows drying times as recorded by a drying recorder. This involves pulling a 10 g needle over a coating film applied with squeegee across a distance of 30 cm at a constant speed for a period of 12 hours Different areas can then be seen on the coating film. While the coating is still runny at the start of the test, the needle...

Anti-corrosive properties Top levels of resistance and corrosion protection To achieve a high degree of resistance and corrosion protection, a range of substrate pretreatments such as zinc phosphating, iron phosphating or sandblasting is recommended for single-layer coatings on steel. Table 2 shows the results obtained compared to a standard structure with two possible pretreatment methods in each case (DIN EN ISO 9227 NSS). Table 2: Results of salt spray test Table 4: Chemical resistance according to DIN EN ISO 2812-1

Outstanding mechanical resistance It is especially the case in industries such as vehicle construction that coating systems are expected to be sufficiently flexible after curing is complete. This means that fully prepared coating films need to be able to resist any deformation of the coated substrate without cracking. Standard coating structures are usually only moderately flexible, because a less flexible epoxy primer is often used. By contrast, the single-coat system boasts outstanding values with respect to deformation and stonechip resistance. When performing the Erichsen cupping test (DIN...

Table 5 shows to what extent volatile organic compounds can be reduced by using such a system. Compared to the smooth single-coat system, VOC emissions can be reduced by around half again per coated square metre. Table 6: Results for single-layer textured coating according to specified resistance tests Emil Frei GmbH & Co. KG Doggingen Am Bahnhof 6 D-78199 Braunlingen