Protective Coatings

Application of film-forming materials

Application of film-forming materials manufactured using brush, roller or of air and airless. Should ensure that the process of applying nor lead to sagging.

When a single-layer deposition of material consumption may reach 150-350 g / m 2. It is recommended to make at least 2 layers.

When the multilayer deposition, each successive layer should be carried out in a direction perpendicular to the previous application.

Also, when the multilayer deposition, it is desirable to use materials of different colors, alternating them during the application. In this case, significantly increases the effectiveness of visual inspection of the continuity of coverage.

For most materials the optimum range of temperature of working area - from +10 °C to +25 °C.

For materials, water-based minimum working temperature of the atmosphere of working zone shall not be less than plus 5 °C, and provided that such temperatures would not be expected in the next 24 hours after application.

For organorastvorimyh materials working temperature range of the atmosphere of the working zone is much wider and may correspond to -20-30 °C up to +30-40 °C. However, remember that most of Cure, both chemical and physical-chemical, is largely dependent on temperature. For most chemical processes, increase or decrease in temperature of 10 °C influences, respectively, to increase or decrease in the rate of 2-3 times. Such a change in the rate of processes should be considered when planning the work and complete outage.

Given the above, even when applied organorastvorimyh compositions, the technical description of which indicated the possibility of their use in extreme temperature conditions, possibly best done by applying average values of allowable temperature range. Especially, this remark applies to two-component systems, one component of which is a hardener such as epoxy or polyester materials. Elevated temperatures can lead to very rapid, not controlled solidification, and temperature may increase during the final cure to several days and sometimes weeks. It is clear that the quality and adaptability of such technology is better not to speak.

For some polymer compositions decrease in temperature affects the viscosity increase. And under certain conditions, the rheological properties of the working composition are not extremely reliable, although the quality of the material will not be degraded. These facts should also be taken into account when selecting materials and technology renovations.

In the process of preparation and application of the working composition should not be applied solvent allowed more than the number stated in the technical guidance. And if possible do a minimum of solvent. Too much solvent in the polymer composition significantly affects the quality of the final polymer. There is a certain dependence of the formation of a polymer coating structure and the rate of evaporation of volatile substances. Simple terms it can say this: until full curing, all the volatiles (the most part) should evaporate. And after the curing residual% volatiles in the polymer should not exceed the established targets.

Immediately after the completion of the work or in front of a technological break, the tools should be cleaned and dried.