Lauryl Ether Phosphate MOA-3P is a high-concentration acidic anionic surfactant. Before use, it usually needs to be pre-diluted or neutralized according to the application scenario, and then added to the formulation system at the recommended dosage.
Detailed Description
Dilution and Pretreatment: The original solution of Lauryl Ether Phosphate MOA-3P is acidic, with a pH value (1% aqueous solution, 25°C) in the range of 1.5-3.0 and an active content ≥95%. In pH-sensitive applications such as personal care products (e.g., shampoo, facial cleanser), it is often necessary to neutralize it with an alkali agent (sodium hydroxide, potassium hydroxide, or triethanolamine, etc.) to the target pH range (usually pH 5.5-7.0). The viscosity of the product increases during neutralization, and this thickening property can be utilized to optimize product consistency. In formulations for industrial cleaning, metalworking fluids, etc., it can be directly diluted with water or added in its acidic form, with the final pH balanced by other alkaline components in the formulation.
Addition Sequence and Compounding in Formulations: This product has excellent compatibility with nonionic, anionic, and amphoteric surfactants. In water-based formulations, after neutralization, MOA-3P is typically mixed and compounded with primary surfactants (such as AES, betaine, etc.), effectively reducing the overall system irritation and enhancing foam fineness. In oil-based or emulsified systems (e.g., pesticide emulsifiable concentrates, metalworking oils), MOA-3P can be first dissolved in the oil phase, and then water is added to form a stable emulsion. Its HLB value is 6.5, making it particularly suitable as an emulsifier for water-in-oil (W/O) emulsions or as a co-emulsifier for oil-in-water (O/W) systems.
Usage in Emulsion Polymerization: In emulsion polymerization systems such as acrylate and styrene-acrylic, MOA-3P participates as a reactive anionic emulsifier in the polymerization process. The pre-emulsification feeding method is commonly adopted: first, MOA-3P is dissolved in deionized water to form a pre-emulsion, then stirred with monomers for pre-emulsification, and subsequently added dropwise into the reactor to initiate polymerization. This operation yields polymer latex with more uniform particle size distribution and imparts excellent mechanical and chemical stability to the final product.
Technical Parameters
| Parameter | Value | Impact on Usage |
|---|
| pH (1% aqueous solution, 25°C) | 1.5 – 3.0 | Neutralization may be required depending on the application scenario, or consideration should be given to its effect on system pH. |
| Active Content | ≥95% | High-concentration product; dosage in formulations can be calculated directly based on active ingredient. |
| HLB Value | 6.5 | Relatively lipophilic, suitable for W/O emulsification systems or as a co-emulsifier for O/W systems. |
| Density (25°C) | Approx. 1.06 g/cm³ | Pay attention to density conversion when metering and feeding. |
| Pour Point | ＜-5°C | Remains liquid in low-temperature environments; no preheating required for winter use. |
| Free Phosphoric Acid | ≤2.0% | Low content reduces the risk of side reactions in the formulation. |
Application Recommendations
The following are recommended usage methods and dosage suggestions based on various application scenarios (specific dosages should be optimized and adjusted according to the actual formulation and target product performance):
- Personal Care Products (shampoo, body wash, facial cleanser): Recommended dosage 2-6%. Partially or completely neutralize with an alkali agent (KOH or triethanolamine) before adding to the water phase, then compound with other surfactants. It can replace part of AES, reduce irritation, and provide natural thickening effects.
- Household and Industrial Hard Surface Cleaners: Recommended dosage 3-8%. It can be added directly as the original solution or after dilution into alkaline cleaning formulations, utilizing its wetting and emulsifying capabilities to enhance degreasing and decontamination performance. It is recommended to combine with nonionic surfactants (e.g., AEO-9) for synergistic effects.
- Textile Dyeing and Finishing Pretreatment (scouring agents, wetting agents): Recommended working solution concentration 1-5 g/L. Add to desizing and scouring baths to accelerate the wetting and penetration of alkali liquor into fibers; when used as an antistatic agent, the dipping concentration is about 0.5-2 g/L.
- Metalworking Fluids (cutting fluids, rust preventive fluids): Recommended dosage 5-15% (based on concentrate formulation). Used as an aqueous emulsifier for base oils, compounded with oleic acid, petroleum sulfonates, etc.; first dissolve in the oil phase, then add water to emulsify; can be added directly to the water phase in neutral to alkaline working fluids.
- Pesticide Formulations (emulsion in water, soluble concentrate): Recommended dosage 3-8%. Add together with pesticide technical material and other surfactants into the oil phase, then stir with water to form a uniform emulsion; its excellent hard water resistance ensures emulsion stability during field dilution.
- Emulsion Polymerization (acrylate, styrene-acrylic systems): Recommended dosage 1-3% (based on total monomer mass). Use a pre-emulsification process: dissolve MOA-3P in water, stir with monomers to disperse, obtain a stable pre-emulsion, and then slowly add dropwise to the reactor.
Precautions
- This product is irritating to skin and eyes (H315, H319). Wear impermeable protective gloves (such as butyl rubber or nitrile rubber gloves) and chemical safety goggles during operation.
- The neutralization process is exothermic. It is recommended to slowly add the alkali agent under stirring conditions, controlling the temperature not to exceed 60°C.
- The product may hydrolyze under strong acid or strong alkali conditions. Attention should be paid to controlling the pH range of the formulation system to maintain its optimal performance.
- After opening, seal the container promptly and store in a cool, dry, well-ventilated environment to avoid moisture absorption or contamination of the product.
- Before use, conduct small-scale tests and formulation compatibility tests to confirm compatibility with other components in the system, and then scale up production.
