Alkali-resistant Penetrating Agent AEP (fatty alcohol polyoxyethylene ether phosphate) is a high-efficiency anionic surfactant produced by Guoli Chemical. Its molecular structure is RO(CH2CH2O)nPO3H2, where R is a C12-14 alkyl chain, n is approximately 9, and the molecular weight ranges from 700 to 900. The product appears as a colorless to light yellow transparent liquid, with an effective active content of up to 98% or more, an HLB value between 11 and 12, and excellent water solubility and low foaming characteristics.
The core advantage of this product lies in its super alkali resistance - it can withstand up to 200 g\/L sodium hydroxide solution without decomposing or losing efficacy, a technical indicator difficult for ordinary penetrants to achieve. At the same time, AEP also exhibits excellent resistance to acid, hard water, and high temperature stability, with no decomposition or oil floating under boiling conditions, meeting the extreme requirements of auxiliaries in harsh processes such as alkali-oxygen one-bath scouring and bleaching, and mercerizing penetration. Its permeability is excellent (≤10 seconds), quickly reducing the surface tension of the working solution (30~35 mN\/m), promoting uniform diffusion of the treatment liquid into the fiber or substrate.
As a multifunctional high-efficiency auxiliary, AEP can be used for multiple purposes with a single agent, not only simplifying the process formula and reducing the variety of chemicals, but also effectively lowering overall operating costs. The phosphate ester group in its molecule provides good emulsifying and dispersing properties, making it perform excellently in various fields such as textile printing and dyeing, leather processing, papermaking and pulping, metal surface treatment, and industrial hard surface cleaning.
| Item | Indicator |
|---|---|
| Chemical Name | Fatty Alcohol Polyoxyethylene Ether Phosphate |
| CAS No. | 68439-39-4 |
| Ion Type | Anionic |
| Appearance | Colorless to Light Yellow Transparent Liquid |
| Active Content | ≥98.0% |
| HLB Value | 11~12 |
| pH Value (1% Aqueous Solution) | 5.0~7.0 |
| Penetration Power | ≤10 seconds |
| Alkali Resistance | Withstands 200g\/L NaOH |
| Surface Tension (1% Aqueous Solution) | 30~35 mN\/m |
| Critical Micelle Concentration (CMC) | 0.01%~0.05% |
| Foaming Characteristics | Low Foaming |
| Acid Value | 150~180 mgKOH\/g |
| Saponification Value | 120~160 mgKOH\/g |
| Density (25°C) | 1.05~1.10 g\/cm³ |
| Kinematic Viscosity (25°C) | 200~500 mPa·s |
| Refractive Index (25°C) | 1.450~1.460 |
| Freezing Point | <0°C |
| Flash Point | >100°C |
| Water Content | ≤1.0% |
| Monoester Content of Phosphoric Acid | ≥50% |
| Diester Content of Phosphoric Acid | 20%~40% |
| Free Phosphoric Acid | ≤5.0% |
| Combined Phosphorus Content | 6.0%~9.0% |
Textile Printing and Dyeing Field: Recommended for alkali-oxygen one-bath scouring and bleaching, cold pad-batch pretreatment, desizing, and mercerizing penetration of cotton and blended fabrics. The suggested dosage is 0.5~3.0 g\/L of the working solution, adjusted according to alkali concentration and process conditions. It performs particularly well in high-concentration caustic soda (150~200g\/L) mercerizing processes.
Leather Processing: In the soaking stage, use 0.3%~0.8% of the leather weight to accelerate the softening of dried leather; in the degreasing stage, use 0.5%~1.5%, combined with alkali agents to significantly enhance deep degreasing effects.
Paper Industry: For waste paper deinking, the recommended addition amount is 0.1%~0.5% of absolute dry pulp; for alkaline cooking, the dosage is 0.2%~0.6% of raw materials, effectively promoting penetration of the chemical solution and improving cooking uniformity.
Metal and Hard Surface Cleaning: As a penetrating component in alkaline degreasing cleaning formulations, the recommended addition amount is 1%~5% of the total formula, used in combination with alkaline auxiliaries such as sodium hydroxide and sodium carbonate, significantly enhancing deep wetting and peeling ability for heavy oil stains.
It is recommended to conduct compatibility tests before use to optimize the process formulation. It can be used in the same bath with anionic and nonionic surfactants and high-concentration electrolytes, with strong formula adaptability.