The specific method of using MOA-3 (AEO-3) varies depending on the application scenario. It is usually added directly to the oil phase as a W/O emulsifier, wetting agent, or dispersant to participate in the formulation. The Guoli Chemical product database does not provide fixed dosage amounts for various application scenarios; the actual dosage needs to be determined through experiments based on the formulation system and process objectives.
Detailed Description
1. Basic Usage Principles
MOA-3 is a typical low-polymerization fatty alcohol polyoxyethylene ether with an HLB value of approximately 8, strong lipophilicity, easily soluble in oils and organic solvents, and dispersible/diffusible in water (cloud point below 20°C). Therefore, it is generally recommended to first dissolve or disperse MOA-3 in the oil phase before mixing with other aqueous phase components, which allows it to fully exert its W/O emulsifying and wetting effects. If added directly to the aqueous phase, strong stirring is required for uniform dispersion.
2. Operation Methods for Typical Application Scenarios
Emulsion Polymerization (as emulsifier): Premix MOA-3 with monomers (such as acrylates, styrene, etc.) evenly, then slowly add to the aqueous phase under stirring for pre-emulsification to form a stable monomer emulsion before initiating polymerization. When used as the primary emulsifier, its dosage can refer to the typical addition range of nonionic emulsifiers.
Metal Cleaning/Hard Surface Cleaner: Premix MOA-3 with oil-soluble solvents, builders, etc., to form a clear oil phase, and dilute to working concentration before use. Its low-foam property makes it especially suitable for high-pressure spray cleaning systems.
Textile Scouring/Penetrating Agent: When preparing the working solution, first disperse MOA-3 into an emulsion with a small amount of warm water (40-50°C), then add to the main bath and stir evenly. It is recommended to combine with anionic surfactants when used as a penetrating agent to enhance effectiveness.
Leather Degreasing: Mix directly with organic solvents or water in proportion to form a degreasing solution, and treat the raw hide in a drum to separate natural fats from the skin using its excellent emulsifying ability.
Technical Parameters
| Parameter Item | Value |
|---|
| Appearance | Colorless to slightly yellow transparent liquid |
| Active Substance Content | ≥99% |
| HLB Value | 8 (W/O emulsifier tendency) |
| Cloud Point (1% aqueous solution) | ＜20℃ |
| Solubility | Easily soluble in oil, dispersible in water |
| pH Value (1% aqueous solution) | 5.0~7.0 |
| Surface Tension (25℃) | 28~32 mN/m |
| Critical Micelle Concentration (CMC) | Approximately 8×10⁻⁵ mol/L |
| Hydroxyl Value | 160~185 mgKOH/g |
| Foam Property | Low foam |
Application Recommendations
Since the Guoli Chemical product database does not include specific recommended dosage amounts for MOA-3 in various application fields, the following reference ranges are provided based on product characteristics (HLB value 8, CMC about 8×10⁻⁵ mol/L) and industry practices. The optimal dosage must be determined through gradient experiments in actual formulations:
- W/O Emulsion/Cream Emulsification: 2%~8% (based on oil phase weight), as the primary emulsifier, can be combined with a small amount of high HLB emulsifier to adjust the hydrophilic-lipophilic balance.
- Emulsion Polymerization Emulsifier: 1%~5% (based on total monomer weight), if necessary, compounded with anionic surfactants to enhance mechanical stability and control particle size.
- Industrial Liquid Detergent/Hard Surface Cleaner: 0.5%~5% (based on total formulation weight), utilizing its penetrating and degreasing ability, low-foam property can reduce the amount of defoamer needed.
- Textile Pretreatment Scouring Agent/Penetrating Agent: 1~3 g/L (working solution concentration), usually works best when combined with anionic surfactants and additives.
- Leather Degreasing Agent: 0.5%~2% (working solution concentration), specific dosage adjusted according to the fat content of the raw hide.
- Metal Parts Cleaning Agent: 3%~10% (formulation concentrate), diluted to appropriate multiples at the site of use.
- Intermediate for Synthetic AES: As a main raw material, the specific usage amount depends on the subsequent sulfonation/sulfation process design and is determined by the process engineer.
Precautions
- Compounding Synergy: MOA-3 has good compatibility with nonionic, anionic, and cationic surfactants. In actual formulations, it is often compounded to optimize overall performance (e.g., combined with AES, LAS, or betaine to balance foam and detergency).
- Temperature Effects: The cloud point of MOA-3 is below 20°C. Turbidity or stratification may occur at lower temperatures, which is a normal physical phenomenon. Stir well before use; product performance is not affected. For transparent water-based product formulations, attention should be paid to the cloud point matching of the system.
- Safety Protection: Wear chemical safety goggles and chemically resistant gloves (e.g., nitrile rubber gloves) during operation. Ensure the operation area is well-ventilated, and avoid skin and eye contact. See product SDS for specific safety information.
- Storage Recommendations: Store sealed in a cool, dry place (5°C~35°C), avoid mixing with strong oxidizers. The shelf life for unopened products is one year from the production date.
- Environmental Note: Causes long-lasting harmful effects to aquatic organisms (H412). Do not discharge undiluted product directly into water bodies or drainage systems. Dispose of waste through qualified professional agencies.
