Antistatic Agent MOA3PK-40 (CAS No.: 39322-78-6) is an anionic specialty surfactant produced by Guoli Chemical, with the chemical composition of fatty alcohol polyoxyethylene ether phosphate potassium salt, composed of a mixture of monoester potassium salt RO(C₂H₄O)₃PO₃K₂ (R=C₁₂₋₁₄ alkyl) and diester potassium salt [RO(C₂H₄O)₃]₂PO₂K, wherein monoester content ≥70%, diester content ≤30%. The product appears as a colorless to light yellow transparent liquid, with effective active matter content ≥40%, and has excellent antistatic properties, emulsifying properties, and wetting properties.
The HLB value of this product is between 11 and 13, soluble in both oil and water, with good amphiphilicity, and can be uniformly dispersed in various polymer substrates. Since it is an anionic surfactant, the phosphate ester bond in its chemical structure is prone to hydrolysis under strong alkaline conditions, so prolonged contact with strong bases should be avoided in the formulation. The combined phosphorus content (calculated as P₂O₅) is 12%~16%, which is the key active component for achieving long-term static dissipation function.
In terms of safety and operation, MOA3PK-40 is a non-flammable liquid (flash point >100°C), with a freezing point below 0°C, and is stable under normal conditions. However, it is irritating to skin and eyes (GHS classification Category 2), harmful to aquatic life with long-lasting effects (Category 3). Necessary personal protective measures should be taken during operation.
| Parameter Item | Specification/Indicator |
|---|---|
| Product Name | Antistatic Agent MOA3PK-40 (Aliases: Fatty Alcohol Polyoxyethylene Ether Phosphate Potassium Salt, Alcohol Ether Phosphate Potassium Salt, MOA-3PK-40) |
| CAS No. | 39322-78-6 |
| Ion Type | Anionic Surfactant |
| Chemical Formula | Monoester: RO(C₂H₄O)₃PO₃K₂; Diester: [RO(C₂H₄O)₃]₂PO₂K (R=C₁₂₋₁₄ alkyl, mixture) |
| Molecular Weight | Monoester potassium salt approx. 474; Diester potassium salt approx. 736; Mixture average approx. 450~500 |
| Monoester Content | ≥70% |
| Diester Content | ≤30% |
| Parameter Item | Specification/Indicator |
|---|---|
| Appearance | Colorless to light yellow transparent liquid |
| Density (25°C) | 1.05~1.15 g/cm³ |
| Kinematic Viscosity (25°C) | 100~500 mm²/s |
| Dynamic Viscosity (25°C) | 100~500 mPa·s |
| Low Shear Viscosity (25°C) | Approx. 200 mPa·s |
| Refractive Index (25°C) | 1.40~1.45 |
| Melting Point/Freezing Point | <0°C |
| Flash Point (Closed Cup) | >100°C |
| Hygroscopicity | Slightly hygroscopic |
| Water Content | ≤1.0% |
| Parameter Item | Specification/Indicator |
|---|---|
| Effective Active Matter Content | ≥40% (Solid Content) |
| pH Value (1% Aqueous Solution, 25°C) | 5.0~7.0 |
| pH Value (5% Aqueous Solution, 25°C) | 5.0~7.5 |
| Acid Value | ≤5 mg KOH/g |
| Hydroxyl Value | Approx. 155 mg KOH/g |
| Iodine Value | ≤1.0 g I₂/100g |
| Free Phosphoric Acid (as H₃PO₄) | ≤1.0% |
| Combined Phosphorus (as P₂O₅) | 12%~16% |
| Free Alcohol | ≤5% |
| Unsaturation | Very low (near saturation) |
| Chemical Stability | Stable under normal conditions; Not resistant to strong bases (ester bond prone to hydrolysis); Avoid strong acids and high temperatures |
| Parameter Item | Specification/Indicator |
|---|---|
| HLB Value | 11~13 |
| Surface Tension (0.1% Aqueous Solution, 25°C) | Approx. 30~35 mN/m |
| Critical Micelle Concentration (CMC, 25°C) | Approx. 2.0×10⁻⁴ mol/L |
| Penetration Power (0.1% Aqueous Solution, Canvas Settling Time) | <60s (Good) |
| Foaming Characteristics | Moderate foam |
| Cloud Point | Not applicable (Anionic surfactants have no significant cloud point) |
| Solubility | Easily soluble in oil and water |
| Saponification Value | None |
| Parameter Item | Specification/Indicator |
|---|---|
| Heavy Metals (as Pb) | ≤20 mg/kg |
| Arsenic (As) | ≤3 mg/kg |
| GHS Classification | Skin irritation Category 2 (H315); Serious eye damage/eye irritation Category 2 (H319); Aquatic chronic toxicity Category 3 (H412) |
| Flammability | Non-flammable liquid, non-explosive |
| Shelf Life | 12 months (Recommended storage temperature 5°C~35°C) |
| Packaging Specification | 200kg, 50kg plastic drums (PE drum or stainless steel container) |
Recommended application areas of MOA3PK-40 include internal antistatic treatment of plastics (PVC, PS, ABS, PE, PP, etc.), spinning finishes for synthetic fibers (polyester, nylon, polypropylene), antistatic treatment of polyurethane foams and elastomers, and static dissipation in oil-based coatings and inks. The recommended dosage depends on the specific system and antistatic grade requirements. Generally, for internal addition, the dosage is 0.5%~3.0% of the resin weight; for surface treatment, it can be diluted and applied by coating. With a moderate HLB value (11~13), it has good dispersion adaptability in both water-based and oil-based systems.
When formulating spinning finishes, MOA3PK-40 can be compounded with other smoothing agents and emulsifiers to impart excellent antistatic properties, smoothness, and cohesion to fibers. When used in polyurethane systems, it can serve as an additive or reactive antistatic component, achieving long-term static dissipation while maintaining the original mechanical properties of the material. In solvent