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Pigment dispersion technology and the role of dispersants
- Categories:Company news
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- Time of issue:2020-12-25
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(Summary description)So far, there are many methods to improve the dispersion and dispersion stability of pigments in aqueous systems, such as rosin treatment, pigment derivative method, organic amine treatment, addition of dispersant, plasma treatment, ultrafine particle adsorption Method, microcapsule method, etc.
Pigment dispersion technology and the role of dispersants
(Summary description)So far, there are many methods to improve the dispersion and dispersion stability of pigments in aqueous systems, such as rosin treatment, pigment derivative method, organic amine treatment, addition of dispersant, plasma treatment, ultrafine particle adsorption Method, microcapsule method, etc.
- Categories:Company news
- Author:
- Origin:
- Time of issue:2020-12-25
- Views:0
Information
So far, there are many methods to improve the dispersion and dispersion stability of pigments in aqueous systems, such as rosin treatment, pigment derivative method, organic amine treatment, addition of dispersant, plasma treatment, ultrafine particle adsorption Method, microcapsule method, etc. Among them, the method of adding dispersant is the most widely used method with better dispersion effect. Adding a dispersant during the pigment dispersion process is the most effective way to keep the pigment dispersion stable. Some dispersants also have a wetting effect and are called wetting and dispersing agents. The pigment dispersant mainly maintains the stability of the pigment dispersion through the following two functions:
（1） Charge protection (electric double layer function). Make the surface of the pigment have the same charge. When the particles are in contact with each other, they repel each other because of the same charge. The charged particles maintain the stability of the system under the action of Coulomb repulsion;
（2） Three-dimensional protection (steric hindrance). The polymer covered on the surface of the pigment particles mechanically isolates the particles, making contact between the particles impossible. The strong interaction between the polymer and water prevents the pigment particles from getting too close.
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