MOA-7 (AEO-7) is a white paste at room temperature (melting point approximately 15-25°C), with an active content of ≥99%, making it a high-concentration nonionic surfactant. In actual use, it is recommended to preheat the product to about 40°C to transform it into a transparent flowing liquid, facilitating accurate weighing and rapid dispersion. When adding, it is advisable to use warm water at 40-50°C for pre-dispersion or pre-dissolution, stirring until completely uniform before adding to the main reaction vessel or formulation system. This avoids issues such as clumping or incomplete dissolution when directly adding to cold water.
The HLB value of MOA-7 is approximately 12, indicating strong hydrophilicity and good solubility in water. It exhibits excellent compatibility with anionic, cationic, and amphoteric surfactants. In formulation design, it is often used as a primary or auxiliary surfactant, significantly enhancing the wetting, penetration, emulsification, and detergency performance of the system. It maintains stable chemical properties in both acidic and alkaline media (good alkali resistance) and is not easily deactivated in hard water, making it highly suitable for complex industrial formulations.
The dosage in specific formulations needs to be optimized based on the target application scenario and performance requirements. In general industrial cleaning formulations, the addition amount of MOA-7 is typically between 2% and 10%; when used as a leveling and penetrating agent in textiles, the concentration is about 0.5-3 g/L (working solution); while as an emulsifier in pesticide emulsification or emulsion polymerization, the dosage is usually between 2% and 6% (relative to the oil phase). The following table provides reference dosages and operational suggestions for various application areas (data sourced from Guoli Chemical product database combined with industry common practices).
| Application Area | Reference Dosage | Key Usage Points |
|---|---|---|
| Industrial and household detergents (laundry liquids, dishwashing detergents, hard surface cleaners) | 2%-10% (of total formulation weight) | Used in combination with anionic surfactants (such as AES, LAS) to enhance degreasing power and foam fineness; preheat to 40°C and blend with other surfactants, then add to water and stir for dispersion. |
| Textile dyeing and printing leveling agents/penetrating agents | 0.5-3 g/L (working solution concentration) | Pre-dissolve in warm water at 40-50°C before adding to the dye bath; can be combined with nonionic and anionic leveling agents; suitable for pretreatment and dyeing processes of cotton, polyester-cotton, and other fabrics. |
| Leather degreasing agents | 0.5%-3% (of soaking/degreasing solution) | Use with an appropriate amount of soda ash or degreasing aids; perform leather soaking and degreasing at 35-45°C to effectively remove natural sebum. |
| Metal hard surface cleaners | 3%-8% (of total cleaning solution weight) | Can be compounded with alkaline additives (such as sodium carbonate, sodium silicate, EDTA, etc.) to form heavy-duty cleaners; suitable for immersion, spray, and ultrasonic cleaning processes; recommended working temperature is 50-70°C (below the cloud point of 65-70°C). |
| Cosmetic emulsifiers and solubilizers | 1%-5% (of total formulation weight) | Used as primary or auxiliary emulsifier in O/W emulsion systems; preheat oil and water phases to 60-70°C separately, dissolve MOA-7 in oil or water phase, then homogenize and emulsify; suitable for creams, lotions, makeup removers, etc. |
| Pesticide emulsifiers | 5%-15% (of total technical material + solvent weight) | Mix MOA-7 with pesticide technical material and solvent evenly; upon use, dilute with water to self-emulsify and form a stable emulsion; can be compounded with anionic emulsifiers (such as agricultural emulsifier 500#, 600# series) to enhance emulsion stability. |
| Emulsion polymerization emulsifiers | 2%-5% (of total monomer weight) | Used as nonionic emulsifying component in acrylate or styrene-butadiene emulsion polymerization, providing micelle nucleation sites; typically used in combination with anionic emulsifiers for better emulsion mechanical stability and particle size distribution. |
| Paper deinking agents | 0.1%-0.5% (relative to oven-dried waste paper weight) | Added during the waste paper pulping stage, combined with alkaline deinking aids such as NaOH and sodium silicate; operates at 50-60°C to achieve separation and suspension of ink from fibers. |
| Oilfield chemicals | Depending on process (generally 0.5%-3%) | Used as drilling fluid emulsifier, produced fluid demulsifier intermediate, or paraffin inhibitor and viscosity reducer component; dosage adjusted according to specific well conditions and process requirements. |
| Parameter Item | Value | Reference Significance for Usage |
|---|---|---|
| Appearance (40°C) | Colorless to slightly yellow transparent liquid | White paste at room temperature; needs to be preheated to 40°C to melt before use |
| HLB Value | ~12 | Strong hydrophilicity, suitable for O/W emulsification and water-based formulation systems |
| Cloud Point (1% aqueous solution) | 65-70°C | Cleaning and emulsification process temperatures should be controlled below the cloud point to ensure optimal surface activity |
| Critical Micelle Concentration (CMC) | Approximately 0.004% (w/w, 25°C) | Extremely low CMC means surface activity can be achieved at very low concentrations, economical dosage |
| pH Value (1% aqueous solution) | 5.0-7.0 | Near neutral, minimal impact on formulation pH, wide compatibility |
| Surface Tension (0.1%, 25°C) | ~28.5 mN/m | Significantly reduces water surface tension, imparting excellent wetting and spreading ability |
| Water Content | ≤0.5% | Almost anhydrous, high-concentration product; can be calculated as 100% active matter in formulation calculations |
| Foam Performance (0.25%, 30°C, Ross-Miles method) | Foam height approximately 100-120 mm | Moderate foaming, meets general cleaning requirements, easy to rinse |
Combination Recommendations: MOA-7 can be compounded with nonionic, anionic, and amphoteric surfactants.