Coating technology: Determination of vapor oil resistance of coating film

Key tips: 1 Coating testing materials and equipment (1) Bottom plate: the bottom plate shall be flat and free of distortion, and the surface of the plate shall be free of any visible cracks and wrinkles Unless otherwise specified, the base plate shall be 120mm × 50mm × 0.2mm ~ 0.3mm tinplate （2） 120 solvent oil; for example, if the distillation range of vehicle gasoline after re steaming meets the requirements of 120 solvent oil in the paint standard GB 1922, it can also be used (3) Rh-75 aviation gasoline (4) Iron block: cylindrical, weight about 500g, flat bottom, diameter & P Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Paint Home News: 1 Paint testing materials and equipment (1) bottom plate: the bottom plate shall be flat and free of distortion, and the surface of the plate shall be free of any visible cracks and wrinkles Unless otherwise specified, the base plate shall be 120mm × 50mm × 0.2mm ~ 0.3mm tinplate (2) 120 solvent oil: if the distillation range of the vehicle gasoline after heavy evaporation meets the requirements of 120 solvent oil in the coating standard GB 1922, it can also be used (3) Rh-75 aviation gasoline (4) Iron block: cylindrical, weighing about 500g, flat bottom, Φ 45 ± 1mm (5) diameter glass slot: as shown in the figure 2、 Coating test step 1 Method a: gasoline immersion method (1) immerse the test plate in the glass tank and add 120 solvent oil or rh-75 aviation gasoline specified in the product standard Unless otherwise specified, adjust the temperature to 23 ± 2 ℃, and maintain the temperature throughout the test Put three test plates into it, and immerse 2 / 3 of the length of each test plate in liquid (2) At the end of the immersion time specified in the product standard, the test plate shall be taken out of the tank, dried with filter paper, and inspected visually immediately or after the placement time specified in the product standard Record whether the surface of the paint film is wrinkled, blistered, peeled off, softened, discolored, lost light, etc At least two of the three test plates are qualified if they meet the requirements of the product standard The upper and lower 5mm wide parts of the immersion boundary shall not be evaluated as the result Note: ① gasoline shall be replaced for each test; ② red paint test plate and light paint test plate shall be tested in two separate tanks; 2 Method B: gasoline pouring method (1) unless otherwise specified, the test shall be conducted under constant temperature and humidity conditions specified in GB 1727 (2) Operation steps Pour 5ml of 120 solvent oil or rh-75 aviation gasoline specified in the product standard on each test plate, immediately make it cover the paint film surface of the test plate, place the film surface of the test plate upward at an angle of 45 ° with the horizontal for 30min, and then lay it flat, place a piece of gauze with two layers of thickness on the paint film surface, put another iron block on it, keep it for 1min, then take it off, turn over the test plate gauze and do not stick to the paint film; or use your fingers to At the back of the sample, tap a few times, and the gauze can fall freely At least two of the three test plates shall meet the above requirements Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,