Anti-sedimentation agent is a chemical substance, which is usually used in coatings, dyes, adhesives and other products to prevent the precipitation of pigments, fillers, particles and other substances in them, and maintain the uniformity and stability of the product. The anti-settling agent usually achieves the anti-settling effect by generating electrostatic interaction or adsorption with the surface of solid particles in the coating. Common anti-settling agents include organic amines, polyacrylamide, polyvinyl alcohol, etc.
Detection performance
The following are some properties and test methods that anti-settling agents may need to check:
| performance | Detection method |
|---|---|
| chemical composition | Infrared spectroscopy, mass spectrometry, nuclear magnetic resonance, etc. |
| Particle size distribution | Laser particle size analyzer, electron microscope, etc. |
| surface potential | Potentiometer, Zeta Potentiometer, etc. |
| Adsorption performance | Adsorption capacity determination, isotherm adsorption curve test, etc. |
| Electrostatic effect | Electrostatic Tester, surface potential Tester, etc. |
| Dispersion properties | Suspension state observation, viscosity test, etc. |
| Durability | Exposure test, damp heat cycle test, etc. |
Detection method
Chemical composition: Common detection methods include infrared spectroscopy, mass spectrometry, nuclear magnetic resonance, etc. These methods can be used to determine the chemical composition and structure of anti-settling agents.
Particle size distribution: The particle size of the anti-sedimentation agent is self-evident for its dispersion performance and anti-settling effect. Common particle size testing methods include laser particle size analyzer, electron microscope, etc.
Surface Potential: The surface potential of an anti-settling agent can affect its interaction with paint or pigment particles. Common test instruments include potentiometers, Zeta potentiometers, etc.
Adsorption performance: The adsorption performance of the anti-sedimentation agent can affect its dispersion performance and anti-settling effect in coatings or adhesives. Common test methods include determination of adsorption capacity, isotherm adsorption curve test, etc.
Effect of electrostatic effect: electrostatic effect is an important mechanism of anti-sedimentation agent. Common testing instruments include electrostatic Testers, surface potential Testers, etc.
Dispersion performance: The dispersion performance of the anti-settling agent can affect its uniformity and stability in the coating or adhesive. Common test methods include suspension state observation, viscosity test, etc.
Durability: Anti-settling agents need to maintain their properties and effectiveness under the conditions of use. Common test methods include exposure test, damp heat cycle test, etc.
Beichao reminds you: Different types of anti-settling agents may need to be tested for their specific performance, and the specific test methods and instruments may also vary due to different types of anti-settling agents.
