Coating additives refer to auxiliary materials used to improve coating performance, increase construction efficiency and reduce costs. There are many types of coating additives, such as leveling agents, dispersants, thickeners, antibacterial agents, desiccants, etc. They can adjust and improve the rheology, adhesion, durability, stability and other properties of coatings, so that coatings are more suitable for different application environments and needs. At the same time, coating additives can also improve the construction efficiency of coatings and reduce costs, such as reducing the loss and splashing of coatings, improving the covering power of coatings, etc. Coating additives are an indispensable and important part of the modern coating industry, and are widely used in construction, automobiles, ships, furniture, industrial equipment and other fields.
Detection performance
| performance | Test items |
|---|---|
| Rheology | Viscosity, fluidity, dispersibility, etc. |
| stability | Dispersion stability, anti-sedimentation, emulsification stability, etc. |
| Adhesion | The degree of bonding between the coating and the substrate |
| weather resistance | UV resistance, water resistance, corrosion resistance, etc. |
| antibacterial properties | Bacteriostatic rate, bactericidal rate, etc. |
| drying time | coating drying time |
| chemical stability | Acid and alkali resistance, oxidation resistance, heat resistance, etc. |
| other | Such as emulsifying effect, wetting performance, anti-skinning performance, etc. |
Detection method
The following are some common detection methods for coating additives:
Rheology: Viscometer, rotational rheometer and other instruments are used to test the viscosity, fluidity and dispersibility of coatings.
Stability: Use centrifuge, agitator and other equipment to test the dispersion stability, anti-settling property, emulsification stability, etc. of the coating.
Adhesion: The degree of bonding between the coating and the substrate is tested by cross-hatch method, peeling method, tensile method and other methods.
Weather resistance: test the UV resistance, water resistance, corrosion resistance, etc. of the coating through artificial accelerated aging test or natural climate exposure.
Antibacterial performance: Use colony counting method, growth inhibition method and other methods to test the indicators such as bacteriostatic rate and bactericidal rate.
Drying time: Use a device such as a drying time Tester to measure how long it takes for the coating to dry.
Chemical stability: Use acidity meter, alkalinity meter, redox potentiometer and other testing instruments to measure the acid and alkali resistance, oxidation resistance, heat resistance, etc. of the coating.
Others: According to the specific types of coating additives and testing items, select appropriate testing methods and equipment for testing.
Beichao reminds you: the performance test of coating additives needs to be carried out in accordance with relevant standards and methods to ensure the accuracy and comparability of test results.
