Moisture-proof agent can be added. Moisture-proof agent is also called anti-whitening agent, which is composed of solvents such as high-boiling esters, benzenes, alcohols, and ketones. Adding it to volatile paints such as nitro paint and perchlorethylene paint can prevent the paint film from whitening or pinholes.
Under humid conditions (relative humidity above 7o%), water vapor in the air will condense on the surface of the paint film, water and solvents are incompatible, and immediately turn into white mist, this phenomenon is called "whitening". In addition, if the temperature is too high or too low during construction, or the compressed air contains water vapor, it will also cause whitening. After adding a moisture-proof agent, this phenomenon can be prevented. When the humidity is too high and the addition of a moisture-proof agent cannot solve the problem, the construction should be stopped.
Moisture-proof agent should be used in conjunction with diluent. Generally, 10%~20% can be added to the diluent, and 3o%~4o% can be added if necessary. However, the moisture-proof agent cannot completely replace the thinner, otherwise the material will be wasted, the cost will be increased and the cost will be increased. Slow down drying.
There are two types of lake-proof agents that have been finalized. Among them, F-1 nitro-lacquer moisture-proof agent is used in combination with nitro-lacquer thinner, and the dosage is generally 1o%~2o%. It is used for the construction of nitro-lacquer in a climate with high temperature, and cannot be used in perchlorethylene paint. . F-2 perchlorethylene paint moisture-proof agent needs to be used in conjunction with perchlorethylene method thinner, generally penetrates 2o%~3o% (do not add other organic solvents, such as alcohols), can prevent the paint film of perchlorethylene paint from flooding white.
