What is Stearylamine Polyoxyethylene Ether AC-1802?

Stearylamine Polyoxyethylene Ether AC-1802 is a nonionic surfactant prepared from stearylamine as the starter, containing both ether bonds and tertiary amine groups in its molecular structure, with CAS number 26635-92-7. It appears as a white to slightly yellow waxy solid at room temperature. It behaves as a nonionic surfactant in neutral and alkaline environments, while in acidic conditions, the amine group becomes protonated, exhibiting cationic characteristics, thus providing unique switchable ionic properties and broad multifunctional application potential.

Detailed Description

Stearylamine Polyoxyethylene Ether AC-1802 (also known as PEG-2 Stearyl Amine, Octadecylamine Polyoxyethylene (2) Ether, Emulsifier AC-1802, etc.) is a high-performance nonionic surfactant produced by Guoli Chemical. Its molecular structure is C₂₂H₄₇NO₂ with a molecular weight of approximately 357.6, prepared by the addition of stearylamine with 2 moles of ethylene oxide. The core advantage of the product lies in its unique molecular structure that can switch between nonionic and cationic states — it remains nonionic in neutral and alkaline conditions, offering excellent chemical compatibility; in acidic systems, the tertiary amine group becomes protonated and converts to a cationic form, significantly enhancing its adsorption capacity to negatively charged substrates (such as fibers, plastics, and mineral surfaces). This characteristic allows it to deliver superior performance under various process conditions.

In terms of application performance, AC-1802 exhibits excellent emulsifying ability, superior dispersibility, outstanding chemical stability, and good antistatic properties. Its HLB value is approximately 4.5, making it a water-in-oil emulsifier with prominent emulsifying effects on various oils and organic solvents. The cloud point ranges from 40 to 50°C, the surface tension is as low as 30 mN/m, and the critical micelle concentration (CMC) is 1×10⁻⁴ mol/L, indicating efficient interfacial activity. The product has an amine value of 150–165 mgKOH/g, tertiary amine content ≥95%, hydroxyl value of 310–320 mgKOH/g, active ingredient content ≥99%, acid value ≤2, iodine value ≤1, melting point of 45–50°C. It is soluble in hot water and organic solvents, dispersible in cold water, and has good formulation adaptability.

With its multifunctional properties, AC-1802 is widely used in seven major sectors: plastics and synthetic fibers (as an internal antistatic agent), textile dyeing and printing (as a leveling agent and softener intermediate), daily chemical products (as a conditioner and emulsifier in shampoos and conditioners), industrial auxiliaries (as an emulsifier and dispersant in coatings, inks, and pesticide emulsifiable concentrates), metalworking fluids (as an emulsifying and corrosion-inhibiting component in cutting fluids), mineral flotation (as a collector for non-metallic minerals such as phosphate and potassium salts), and oilfield chemicals (as a demulsifier and corrosion inhibitor component), providing customers with efficient and reliable integrated solutions.

Technical Parameters

Application Suggestions

AC-1802 has a wide coverage of application fields. The following usage suggestions for different scenarios are provided:

• Antistatic for Plastics and Synthetic Fibers: As an internal antistatic agent, the recommended dosage is 0.1% to 0.5% of the resin weight. It can be directly mixed during polymer processing to significantly reduce the surface resistance of the material to 10⁹ to 10¹¹ Ω. Suitable for PE, PP, PS, and various synthetic fibers.
• Leveling/Softening Finishing in Textile Dyeing and Printing: As an auxiliary intermediate, the dosage is generally 1% to 3% of the fabric weight. In acidic bath conditions, its cationic properties enhance adsorption, improving leveling effect and fabric hand feel.
• Conditioning and Emulsifying in Daily Chemicals: Recommended dosage of 0.5% to 2.0% in shampoos and conditioners, achieving optimal conditioning effects in weakly acidic formulations (pH 4.5~6.5), significantly improving wet combing smoothness. For cream emulsification, dosage is 1% to 5%. Due to its low HLB value (4.5), it is suitable for preparing W/O emulsions. It is recommended to combine with high HLB emulsifiers to expand the emulsification range.
• Industrial Emulsification and Dispersion: In systems such as pesticide emulsifiable concentrates, coatings, and inks, recommended dosage is 2% to 8%, effectively emulsifying and dispersing the oil phase, improving product uniformity and stability.
• Metalworking Fluids: In cutting fluid and grinding fluid formulations, dosage of 3% to 10%, providing emulsifying, lubricating, and corrosion inhibiting functions, helping to extend the life of the working fluid and improve the surface finish of the workpiece.
• Mineral Flotation Collectors: As a flotation collector or auxiliary collector for non-metallic minerals such as phosphate and potassium salts, the dosage is adjusted based on pulp density and mineral properties, generally ranging from 100 to 500 g/t of raw ore. The selective adsorption of amine groups to target minerals enables efficient separation.

Precautions

• This product is classified as a skin irritant (Category 2) and eye irritant (Category 2A). During operation, be sure to wear chemical-resistant protective gloves and protective goggles/face shields to avoid direct contact with skin and eyes.
• It is harmful to aquatic organisms (Category 3). Do not discharge the product or wastewater containing this product directly into water bodies. Proper treatment must be carried out and disposal performed in accordance with regulations.
• It is recommended to store in a cool, dry, and well-ventilated area. Storage temperature should be maintained at