In the series of dodecylamine polyoxyethylene ether products from Guoli Chemical, AC-1215 (15EO), as a product with a high molar ratio of addition, has a performance positioning that is fundamentally different from its lower EO number counterparts (such as AC-1202, AC-1205). The AC-1215 molecule introduces 15 ethylene oxide (EO) units, and the longer polyoxyethylene ether chain segment significantly enhances the hydrophilicity of the molecule. This is directly reflected in its HLB value as high as 15.6, much higher than AC-1205 (approximately 10-11) and AC-1202 (approximately 6-7), making it an efficient O/W (oil-in-water) emulsifier and solubilizer. In practical applications, this means AC-1215 can easily dissolve in cold water, and its aqueous solution remains stable at high temperatures, without the "cloud point" precipitation phenomenon observed in lower EO number products (the cloud point of AC-1215 is >100°C).
Structure determines performance. The AC-1215 molecule retains both the tertiary amine group and the long-chain polyoxyethylene ether segment, which is its most unique advantage. Under normal neutral or alkaline conditions, it behaves as a stable nonionic surfactant with excellent resistance to hard water, acids, and alkalis; however, in an acidic medium, its amine groups protonate and acquire a positive charge, instantly transforming into a cationic surfactant. This "intelligent switching" mechanism is not possessed by ordinary fatty alcohol polyoxyethylene ethers (AEO series) or pure cationic surfactants. Therefore, in acidic cleaning agents or acidic metal treatment fluids, AC-1215 not only acts as a solubilizer but also utilizes its cationic properties to adsorb onto metal surfaces, providing additional corrosion inhibition and rust prevention functions, which are difficult to achieve with low EO number amine ethers or conventional nonionic surfactants.
Furthermore, the long chain segment brought by the high EO number endows AC-1215 with a lower CMC value (approximately 9×10⁻⁵ mol/L, i.e., 0.009%), much lower than that of AC-1205. This means that at extremely low usage concentrations, AC-1215 can form micelles and exert significant emulsifying and dispersing effects. Combined with its excellent penetration performance (1% aqueous solution, canvas settling method, penetration force ≤100 seconds), in the leveling process of textile dyeing and printing and in the emulsification and dispersion of pesticide formulations, it can achieve more uniform and stable treatment effects with lower addition amounts, helping downstream customers reduce costs and increase efficiency.
The following is a comparison of core parameters for different EO number dodecylamine polyoxyethylene ether products from Guoli Chemical (some data for low EO products are temporarily unavailable and supplemented with general characteristics):
| Parameter | AC-1215 (15EO) | AC-1210 (10EO) | AC-1205 (5EO) | AC-1202 (2EO) |
|---|---|---|---|---|
| Appearance (25°C) | Colorless to light yellow transparent liquid | Colorless to slightly yellow liquid | Colorless to light yellow transparent liquid | Colorless to slightly yellow transparent liquid |
| HLB Value | Approximately 15.6 | Approximately 12-13 | Approximately 10-11 | Approximately 6-7 |
| Cloud Point (1% Aqueous Solution) | >100°C (No cloud point) | Approximately 80-90°C | Approximately 40-50°C | Insoluble in water (turbid) |
| Water Solubility | Easily soluble in water, transparent solution | Soluble in water, good dispersion | Dispersible in water | Oil soluble, insoluble in water |
| Amine Value (mg KOH/g) | 55~65 | Parameter temporarily unavailable | Parameter temporarily unavailable | Parameter temporarily unavailable |
| Surface Tension (1%, 25°C) | ~31 mN/m | Parameter temporarily unavailable | Parameter temporarily unavailable | Parameter temporarily unavailable |
| Core Characteristics | High hydrophilicity, nonionic/cationic dual nature, acid resistance | Moderate hydrophilicity, emulsification and detergency | Low hydrophilicity, emulsification and dispersion, defoaming | Lipophilic, W/O emulsification, antistatic |
Based on the above advantages, choosing AC-1215 in the following scenarios will yield significant benefits: