In the adhesive emulsion polymerization, the emulsifier plays the role of emulsifying, dispersing and solubilizing monomers.
The amount of emulsifier is small and the effect is significant, which can improve production efficiency and reduce energy consumption; it can also improve the quality of the adhesive and reduce the problems of excessive viscosity that may occur during the production process.
In recent years, the awareness of environmental protection and related policies have been strengthened. In the adhesive industry, the effective use of emulsifiers is one of the important indicators to measure the preparation technology. It is an important measure to improve the quality of adhesives, develop new functions, and increase benefits.
Application of different types of emulsifiers
1. Application of anionic emulsifier:
Anionic emulsifiers have a lower critical micelle concentration (CMC) than nonionic emulsifiers. The emulsion particles produced are small, the mechanical stability of the emulsion is good, and gelation is rarely generated during the polymerization process. The current applications are compared. widely.
2. Non-ionic emulsifier:
The non-ionic emulsifier has a long-chain hydrophobic alkyl chain and a hydrophilic carboxyl group or ether bond in the molecular structure. It has lipophilic and hydrophilic functions. The advantage is that it is not afraid of hard water and has good chemical stability to electrolytes. With a wide pH range, the obtained emulsion has good electrolyte stability and freeze-thaw stability. The disadvantage is that the latex particles tend to clump when the non-ionic emulsifier is used alone, which causes the emulsion to be unstable.