Выравниватель – это своего рода добавка к покрытию., что может сделать поверхность покрытия гладкой после строительства, and reduce the defects such as waves and bubbles on the surface of the coating. Leveling agent is generally a polymer organic compound, its role is to reduce the surface tension of the coating, thereby reducing the accumulation of liquid and bubble formation on the surface of the coating, so that the surface of the coating is smoother. The amount of leveling agent in the paint is small, usually only need to add 0.1% к 1% of the proportion, but for some high-demand coating products, the choice of leveling agent and the amount of addition is very important.

Test performance and standard
The following is the performance of the leveling agent to be tested and the corresponding testing method, as well as the possible testing standards:

Тестирование производительности, метод испытаний и стандарт испытаний выравнивающего средства

Тестирование производительности, метод испытаний и стандарт испытаний выравнивающего средства

It is necessary to select appropriate detection methods and standards according to different types of leveling agents and application scenarios, and pay attention to the accuracy and repeatability of detection.

Метод обнаружения
The following is the performance of the leveling agent to be tested and the corresponding testing method:

Появление: Observe the appearance of the sample and check whether there are bad phenomena such as color difference, suspended matter and precipitation.

Вязкость: It can be measured by rotating viscometer, drip method, direct drawing method and other methods. The rotary viscometer can measure the viscosity, fluidity and other properties of leveling agent. Drip method can be used to test the flow performance of paint, usually using centrifugal drip meter or tube drip meter; The direct stretching method is suitable for the measurement of high viscosity coatings.

Плотность: The density of the leveling agent is measured using a densitometer, usually a tube densitometer or an electronic densitometer.

Растворимость: Solubility test can be carried out, the leveling agent is mixed with the solvent and observed and judged, and it can also be analyzed by instruments such as GC-MS.

Волатильность: can use oven method to determine the volatility of the paint, according to a certain temperature and time conditions, measure the quality of the paint change, calculate the volatile content. Testing standards include ISO 3251, ASTM D2369, ГБ/Т 1728, и т. д..

Тестирование производительности, метод испытаний и стандарт испытаний выравнивающего средства

Время сушки: can be measured by oven method, touch drying method and other methods, according to the degree of coating drying to evaluate the length of drying time. Testing standards include ASTM D1640, ASTM D869, ИСО 9117, и т. д..

Плоскостность: It can be measured by color difference meter, observation method, patch method and other methods to evaluate the flatness and gloss of the coating surface. Testing standards include ISO 2813, ASTM D523, ДЖИС К. 7105, ГБ/Т 9754, и т. д..

Адгезия: The bonding strength between the coating and the substrate can be measured by means of grid method and peel test. Test standards include ASTM D3359, АСТМ Д6677, ГБ/Т 9286, и т. д..

Износостойкость: Wear testing machine can be used to measure the wear resistance of the coating. Testing standards include ISO 7784, АСТМ Д4060, ДЖИС К. 7204, ГБ/Т 1768, и т. д..

Химическая устойчивость: Chemical resistance test can be used to soak in chemical reagents to test the resistance of the coating to chemical reagents.

Водонепроницаемый: soaking test, spray test and other methods can be used to measure the coating’s resistance to water. Testing standards include ISO 2812-2, АСТМ Д2247, ДЖИС К. 5600-7-1, ГБ/Т 1733, и т. д..

Устойчивость к атмосферным воздействиям: artificial climate aging test, natural climate aging test and other methods can be used to measure the durability of the coating under different climatic conditions. Testing standards include ASTM D4587, ИСО 11507, ДЖИС К. 5600-5-7, ГБ/Т 1865, и т. д..

Огнестойкость: flammability test, combustion test and other methods can be used to measure and evaluate the fire resistance of the coating. Testing standards include ASTM E84, ГБ/Т 8626, и т. д..

содержание ЛОС: It can be measured by gas chromatography to evaluate the content of volatile organic compounds in coatings. Testing standards include ASTM D6886, ДЖИС К. 0561, ГБ/Т 23985 и так далее.