(1) Definition
The non-volatile content is the percentage of weight loss due to the volatilization of volatile matter when a certain amount of powder coating is baked under specified temperature conditions, and the unit is expressed in %.
(2) Equipment
Oven: can be heated and controlled to 105°C±2°C or 230°C±3°C
Aluminum foil dish: flat bottom, diameter 5omm, height 10mm.
Sense of balance: 0.001g.
(3) Test procedure
Weigh out 2.0g±0.1g powder sample, put it into a weighed aluminum foil dish, put the dish into an oven with a constant temperature of 105°C±2°C and bake for 1 hour, or in an oven at 230°C±3°C for 5 minutes, Put it in quickly to avoid a significant drop in the baking temperature, then take out the aluminum foil dish, cool it to room temperature, and weigh it.
(4) Results
Calculate the non-volatile content according to the formula, accurate to 0.1g.
