• Follow us
Home > News > Content
Ashless Dispersant The Surface Forms An Adsorption Layer
Aug 28, 2017

ashless dispersant The surface forms an adsorption layer

The principle and use of the ashless dispersant

Surfactants that stabilize the solid particles in the solid-liquid suspension in the medium are called ashless dispersants. Dispersion is the uniform distribution of solid particles in the dispersion process, the dispersion has a certain stability.

 mechanism:

1. Adsorbed on the surface of the solid particles, so that the surface of the solid particles is easy to moist.

2. A polymer type ashless dispersant which forms an adsorption layer on the surface of the solid particles to increase the charge on the surface of the solid particles and to increase the reaction force between the particles forming the three-dimensional barrier.

3. The surface of the solid particles to form a bilayer structure, the outer layer of ash-free dispersant polar end and water have a strong affinity, increasing the degree of solid particles wet by the water between the solid particles due to electrostatic repulsion and away from

4. The system evenly, the suspension performance increases, do not precipitate, so that the same physical and chemical properties of the same system

As described above, the solid particles in the liquid can be stably dispersed using a ashless dispersant. Choose ashless dispersant

In our paint production process, pigment dispersion is a very important production process, it is directly related to the storage of paint, construction, appearance and performance of the film, so a reasonable choice of ashless dispersant is a very important part of the production. However, the dispersion of the coating slurry is not only good and no ash dispersant has a relationship, and the formulation of paint formulations and the choice of raw materials are related. The ash-free dispersant is the name of the powder, which is a reasonable dispersion of the powder in the solvent, through a certain charge rejection principle or polymer steric hindrance effect, so that a variety of solid is very stable suspension in the solvent (or dispersion). The dispersion of solid particles in the medium is generally divided into three stages.

 1. Solid particles of moisture, moisture is the most basic conditions for the dispersion of solid particles, if the solid particles to be evenly dispersed in the medium, we must first make each solid particles or particles, can be cut into full wet

 2. Dispersion or fragmentation of ionic groups In this process, the particles are dispersed or fragmented, involving the separation of solid particles at the agglomerate and inside. The difference in the type of surfactant is also different in the dispersion or fragmentation of the particles.