Anionic wetting and dispersing agent
Most are composed of a non-polar, negatively charged, oleophilic hydrocarbon chain portion and a polar, hydrophilic group. The two groups are located at both ends of the molecule, forming an asymmetric hydrophilic and lipophilic molecular structure. Its varieties are: sodium oleate C17H33COONa, carboxylate, sulfate (R-O-SO3Na), sulfonate (R-SO3Na) and so on. The anionic dispersant has good compatibility. For example, Shangao Special Chemical Sago-9700 wetting dispersant is widely used in water-based coatings and inks. Polycarboxylic acid polymers can also be used in solvent-based coatings and widely used as controlled flocculating dispersants.
Cationic wetting and dispersing agent
Is a non-polar base with a positively charged compound, mainly amine salts, quaternary amine salts, pyridinium salts and the like. Cationic surfactants have a strong adsorption force, and have a good dispersion effect on carbon black, various iron oxides, and organic pigments. However, pay attention to chemical reactions with carboxyl groups in the base material, and do not use them with anionic dispersants at the same time.

Controlled radical hyperdispersant
The latest controlled free radical polymerization technology (CFPP) can be used to make the structure of the dispersant more regular. Commonly used methods are: GTP, ATRP (atomic transfer radical polymerization), RAFT (reversible addition-fragmented chain transfer controlled radical polymerization, including C-RAFT and S-RAFT, etc.), NMP, SFRP (stable radical polymerization) , TEMPO, etc. By adopting controlled radical polymerization technology, the relative molecular mass distribution of the dispersant can be made more concentrated, the anchoring groups can be more concentrated, and the efficiency can be higher. Such as Shanggao special chemical Sago-9311, EFKA-4310 wetting and dispersing agent, wide compatibility, especially excellent performance of color organic pigments, is widely used in nano general color paste and other industries.