The chemical nature of antistatic agents MOA3PK-40 and MOA3PK-70 is the same, both being fatty alcohol polyoxyethylene ether phosphate potassium salt (CAS No.: 39322-78-6), belonging to anionic special surfactants. The first difference between the two is reflected in the active matter concentration: MOA3PK-40 has an active matter content of ≥40%, while MOA3PK-70 has ≥70%. The latter has a significantly higher concentration, meaning that at the same addition level, MOA3PK-70 can provide higher antistatic activity.
The second key difference is the hydrophilic-lipophilic balance (HLB) value: MOA3PK-40 has an HLB value of about 11~13, with stronger hydrophilicity, making it easy to disperse uniformly in aqueous systems and highly polar resins; MOA3PK-70 has an HLB value of about 4.5, with significantly stronger lipophilicity, offering better compatibility and migration control in non-polar or low-polarity systems (such as polyolefin plastics). In addition, MOA3PK-70 is a low-foam product with better alkali resistance and relatively milder environmental hazard classification (not classified as environmentally hazardous), while MOA3PK-40 poses a risk of aquatic toxicity and requires attention.
In terms of performance, both products have good emulsifying, wetting, and static dissipating efficiency. However, due to differences in concentration and HLB, MOA3PK-70 is more suitable for applications sensitive to dosage, requiring long-lasting antistatic properties, and with low substrate polarity; MOA3PK-40 is suitable for scenarios requiring rapid wetting and spreading, and high process simplicity, especially performing well in water-based coatings or polar polymers (such as PVC, ABS).
| Parameter Item | MOA3PK-40 | MOA3PK-70 |
|---|---|---|
| CAS No. | 39322-78-6 | 39322-78-6 |
| Ionic Type | Anionic | Anionic |
| Appearance | Colorless to light yellow transparent liquid | Light yellow to yellow transparent liquid |
| Active Matter Content | ≥40% | ≥70% |
| HLB Value | 11~13 | ~4.5 |
| pH Value (1% aqueous solution, 25°C) | 5.0~7.0 | 5.0~7.0 |
| Density (25°C) | 1.05~1.15 g\/cm³ | approx. 1.05 g\/cm³ |
| Foam Characteristics | Moderate foam | Low foam |
| Alkali Resistance | Not resistant to strong alkali (ester bond prone to hydrolysis) | Alkali resistant |
| Monoester Content | ≥70% | ≥60% |
| Water Content | ≤1.0% | ≤30% |
| Environmental Hazard Classification | Aquatic chronic toxicity category 3 (H412) | Not classified as environmentally hazardous |
When to choose MOA3PK-40:
When to choose MOA3PK-70: