MOA-4 (AEO-4) is a nonionic surfactant produced by the addition polymerization of ethylene oxide using C12-14 fatty alcohols as initiators. Its molecular structure endows it with excellent emulsifying ability, outstanding wetting and penetrating properties, and good dispersibility. It also has broad chemical compatibility, being able to withstand acidic, alkaline, and hard water environments, and can be combined with anionic, cationic, and amphoteric surfactants for synergistic effects. These characteristics make it an indispensable and efficient component in many industrial and household formulations.
As a fatty alcohol polyoxyethylene ether with medium-low polymerization degree, MOA-4 has a moderate hydrophilic-lipophilic balance (HLB) value, making it particularly suitable as an O/W type emulsifier. In emulsion systems, it can effectively reduce the oil-water interfacial tension to form a stable emulsion, suitable for various oil phase systems, serving as a core functional auxiliary agent in many fine chemical formulations.
The following are its specific applications in various industries and processes.
| Industry | Specific Process/Product | Function |
|---|---|---|
| Household Liquid Detergents | Laundry liquids, dishwashing detergents, liquid laundry soap | Provides low-foam degreasing performance and low-temperature washing efficacy, enhancing oil and dirt removal ability |
| Industrial Cleaners | Metal surface cleaning, hard surface cleaning, fabric washing | Acts as a component with strong penetration and corrosion resistance, effectively removing mineral oils, greases, and solid particles |
| Textile Printing and Dyeing Auxiliaries | Pretreatment penetrating agents/leveling agents (for cotton, polyester, etc.) | Accelerates the penetration of alkali or bleaching agents into the fiber; promotes uniform dye uptake, reduces color spots, and improves dyeing uniformity |
| Leather Processing | Soaking and degreasing stages | Effectively removes natural fats and dirt from raw hides, keeping the leather surface clean and soft, laying the foundation for subsequent tanning processes |
| Pesticide Formulations | Emulsifiable concentrates (EC), microemulsions (ME), etc. | As a nonionic emulsifier, it uniformly disperses oil-soluble pesticides in water, enhancing the wetting and spreading ability of the spray liquid on plant leaves and insect bodies, ensuring dilution stability |
| Coatings and Inks | Water-based coatings, printing inks | Improves pigment wetting and dispersion, enhances system stability and storage stability, assists in regulating film drying speed and flowability |
| Emulsion Polymerization | Emulsion polymerization of monomers such as acrylates and vinyl acetate | Serves as a primary or auxiliary emulsifier, controlling latex particle size distribution, enhancing emulsion stability and solid content |
| AES Synthesis | Production of alcohol ether sulfate (AES) | As a key intermediate, further processed via sulfation/neutralization to prepare anionic surfactant AES, widely used in detergents and personal care products |
In formulation design, due to its nonionic nature, MOA-4 can be flexibly combined with anionic, cationic, and amphoteric surfactants for synergistic effects. It is recommended to adjust the dosage according to the HLB requirements of the target system and the type of oil phase. In emulsion polymerization, it can be used as the main emulsifier to control latex particle size. In pesticide formulations, it can be used with anionic emulsifiers to improve emulsion stability. The product has high active content, allowing precise and controllable addition, resulting in outstanding usage efficiency.