What are the common types of dispersant structures?

The targeted effects of chemical additives with different structures vary. Common additive structures include low molecular weight and high molecular weight types. However, today we will mainly talk about the four main chemical structures of commonly used dispersants. Today, it is necessary for the editor of Jianjian Chemical to analyze and summarize the following chemical structures of dispersants:

1. Low molecular weight carboxylic acid amide salts and electrically neutral long-chain carboxylic acid polyamino salts have a large number of adsorption groups, which can form a strong adsorption layer on the surface of pigments, improve the stability of pigment dispersion, and prevent floating color and flower formation;

2. Dispersants of high molecular weight carboxylic acid ester polymers form steric hindrance control by adsorbing groups with high molecular weight chains onto the surface of pigments, preventing pigment flocculation and maintaining the stability of pigment dispersion systems;

3. Polymer or block copolymer containing anchoring groups, the anchoring groups can be firmly fixed on the surface of the pigment, while higher molecular weight solvation chains can be effectively dispersed in the paint, increasing the thickness of the adsorption layer and improving dispersion stability;

4. Polyvalent carboxylic acid polymer, containing a large number of carboxyl groups and strong polarity, can form a thixotropic fluid in coatings, allowing pigments to form a controllable coagulation and dispersion state, which is very effective in preventing floating color and discoloration.