Emulsifier MOA-3B (fatty alcohol polyoxyethylene (3) ether) is a nonionic surfactant with an HLB value of 6~7, which is relatively lipophilic and easily soluble in oils and organic solvents, and dispersible in water. This gives it an important characteristic in usage: it usually needs to be dissolved in the oil phase or solvent phase first before mixing with other components. Usage methods vary greatly across different applications, as explained by industry below.
In pesticide emulsifiable concentrate systems, MOA-3B serves as a core emulsifying component, generally prepared together with pesticide technical materials and other additives. During use, MOA-3B is first mixed uniformly with the technical material and solvent to form a transparent oil phase. When diluted in the field, this oil phase spontaneously emulsifies in water to form a stable oil-in-water emulsion. In emulsion polymerization, MOA-3B acts as a polymerization stabilizer, typically pre-dissolved in the monomer phase, then mixed with the aqueous phase for pre-emulsification, providing micelle nucleation sites and stabilizing latex particles. When used as a dispersant in oil-soluble systems, it can be directly added to oil-based or solvent-based formulations and stirred for dispersion, promoting uniform suspension of solid particles or pigments.
| Parameter Item | Value |
|---|---|
| Ion Type | Nonionic |
| HLB Value | 6~7 |
| Appearance | Colorless to slightly yellow transparent liquid |
| Active Content | ≥99% |
| pH Value (1% Aqueous Solution) | 5.0~7.0 |
| Density (20°C) | 0.92~0.93 g/cm³ |
| Solubility | Easily soluble in oils and organic solvents, dispersible in water |
| Cloud Point | Insoluble in water, no cloud point |
| Flash Point (Open Cup) | ≥150°C |
| Hydroxyl Value | 160~175 mgKOH/g |
| Kinematic Viscosity (40°C) | Approx. 30 mm²/s |
| Foam Characteristics | Low foam |
According to the product database of Guoli Chemical, the usage of MOA-3B in various application fields is as follows:
1. Pesticide EC Emulsifier: As a core emulsifying component in the formulation, it is mixed with pesticide technical material and solvent to form an emulsifiable concentrate. Upon dilution, it automatically emulsifies to form an oil-in-water emulsion. Reference dosage (industry experience): Typically accounts for 5%~15% of the EC formulation, optimized based on the nature of the technical material and oil phase ratio.
2. Component in Textile Finishing Oils: Functions as an emulsifier, smoothing agent and bundling agent in synthetic fiber spinning oils. Reference dosage (industry experience): Generally accounts for 3%~10% of the oil formulation, used in combination with other smoothing agents and antistatic agents.
3. Textile Leveling Agent/Antistatic Agent: Used in fabric pretreatment and dyeing processes. Reference dosage (industry experience): When used as a leveling agent, the working solution concentration is typically 0.5~2 g/L; when used as an antistatic finishing agent, the pad bath concentration is recommended at 1~5 g/L.
4. Industrial Mold Release Lubricant: Applied to the mold surface to form a release film. Reference dosage (industry experience): Generally dissolved in solvent or water at a concentration of 2%~5%, sprayed or brushed onto the mold surface.
5. Latex Polymerization Stabilizer: Provides micelle nucleation sites and stabilizes latex particles. Reference dosage (industry experience): Typically accounts for 1%~4% of the total monomer amount, adjustable based on target particle size and stability requirements.
6. Dispersant in Oil-Soluble Systems: Promotes uniform dispersion of solid particles in oil-based formulations. Reference dosage (industry experience): Generally accounts for 1%~5% of the total system, starting optimization from 10%~30% of the amount of dispersed solids.
Important Note: The above dosages are general industry reference ranges. The product database of Guoli Chemical does not contain specific recommended dosage data for this product in various application fields. In actual use, due to differences in formulation system, oil phase type, target performance, etc., the optimal dosage should be determined through orthogonal experiments or gradient tests. It is recommended to start from a lower concentration and gradually optimize to achieve the best effect.