In the series of stearylamine polyoxyethylene ether products from Guoli Chemical, the main difference between AC-1802 (2EO) and AC-1820 (20EO), AC-1830 (30EO) lies in the number of ethylene oxide (EO) additions. AC-1802 adds only 2 EO units, resulting in a small molecular weight and a very high proportion of lipophilic groups (stearylamine long carbon chain), which gives it an extremely low HLB value (approximately 4-5), providing irreplaceable advantages in water-in-oil (W/O) emulsion systems. Unlike the high-EO series products that are only suitable for oil-in-water (O/W) systems, AC-1802 can efficiently emulsify non-polar oils such as mineral oil, white oil, and silicone oil, making it a core choice for preparing water-in-oil creams, industrial emulsified oils, and textile oil agents.
Another key differentiating advantage of AC-1802 is the protonatable characteristic of its amine group. Due to the short EO chain, the steric hindrance of the amine group is small, and under acidic conditions, it can quickly protonate into a cationic type, exhibiting strong adsorption capacity on negatively charged substrates (such as metal surfaces, textile fibers, and mineral particles). This property makes AC-1802 much more efficient than high-EO AC-1820 and AC-1830 in applications such as mineral flotation collection, metal surface adsorption and corrosion inhibition, and textile softening and antistatic treatment—the latter two, due to the long EO chain wrapping the amine group, have significantly weakened cationic properties and reduced adsorption efficiency.
Additionally, in the field of plastic antistatic, the low molecular weight of AC-1802 allows it to migrate more easily to the polymer surface to form a conductive layer, resulting in faster onset of action compared to high molecular weight similar products; in daily chemical conditioning formulations, its short EO chain leads to higher adsorption and deposition on hair and skin, providing more direct conditioning effects. In terms of chemical stability, AC-1802, like high-EO products, tolerates hard water, acids, and bases, adapting to complex industrial environments.
| Parameter Item | AC-1802 (2EO) | AC-1820 (20EO) | AC-1830 (30EO) |
|---|---|---|---|
| CAS No. | 26635-92-7 | 26635-75-6 | 26635-75-6 |
| Molecular Formula | C₂₂H₄₇NO₂ | C₅₈H₁₁₉NO₂₀ | C₁₈H₃₉N·(C₂H₄O)₃₀ (average) |
| Appearance | White to slightly yellow waxy solid | Light yellow to yellow | Pale yellow to yellow |
| HLB Value (estimated) | Approx. 4-5 | Approx. 15-16 | Approx. 16-17 |
| Water Solubility | Insoluble in water, dispersible in oil | Easily soluble in water | Easily soluble in water |
| Lipophilicity | Extremely high | Medium | Low |
| Cationic Adsorption Capacity (acidic system) | Extremely strong | Relatively weak | Weak |
Note: HLB values are estimates based on EO content. For actual measured data, please consult the technical department of Guoli Chemical.
Select the appropriate EO number product according to your specific needs: