What is the difference between the thinners for spreading with a brush and spraying?
Brush thinners consist of a mixture of solvents, which evaporate more slowly. Spray solvent blend evaporates faster. This is to guarantee the optimal performance properties of the material.
Please explain the concept of solvent auto-ignition temperature
The auto-ignition temperature is the lowest temperature, in which the mixture of solvent vapors and air ignites spontaneously.
Please provide the division of solvents into flammability groups
Solvents are divided into groups of flammability (Tl—T5) by their self-ignition temperature, i.e. the lowest temperature, in which the mixture of solvent vapors and air ignites spontaneously. The following flammability groups and the corresponding flash point are distinguished:
T1 – above 723 K (above 450 ° C);
T2 – 573—723 K (300-450°C);
T3 – 473-573 K (200-330°C);
T4 – 408-473 K (135-200°C);
T5 – 373-408 K (100-135°C).
How are the explosive limits of solvents determined?
The explosive limits of solvents are defined as the lower and upper ignition range. It is the lowest and the highest volume concentration of the solvent in the air, respectively, which may still ignite.