The main component of Octadecylamine Polyoxyethylene Ether AC-1812 is the condensation product of octadecylamine (stearylamine) and ethylene oxide, with the chemical name Octadecylamine Polyoxyethylene (12) Ether.
Detailed Description
Octadecylamine Polyoxyethylene Ether AC-1812 is a nonionic surfactant, whose core component is formed by chemically bonding a hydrophobic octadecyl primary amine (stearylamine) with a hydrophilic polyoxyethylene chain segment. According to the Guoli Chemical Product Database, the molecular formula of this product is C18H37N(CH2CH2O)12H, with CAS number 26635-75-6. From a chemical structure perspective, it introduces 12 ethylene oxide (EO) units at the nitrogen atom of octadecylamine, hence it is also called Polyoxyethylene (12) Octadecylamine or PEG-12 Stearylamine.
The product appears as a light yellow to yellow paste or viscous liquid, with an effective active content as high as over 99%. This unique amphiphilic structure endows the product with excellent emulsifying, dispersing, antistatic, and leveling properties. It is worth noting that although the product is essentially nonionic, the tertiary amine group in its molecule accepts protons under acidic conditions, thereby exhibiting the characteristics of a cationic surfactant, which greatly broadens its application range.
Key Composition and Physicochemical Parameters
| Parameter Item | Specification Indicator | Parameter Item | Specification Indicator |
|---|
| Chemical Name | Octadecylamine Polyoxyethylene (12) Ether | Appearance (25°C) | Light yellow to yellow paste/viscous liquid |
| Active Content | ≥99% | Ion Type | Nonionic (cationic in acidic conditions) |
| Amine Value | 70~85 mg KOH/g | Tertiary Amine Content | ≥95% |
| HLB Value | Approximately 13.5 | Hydroxyl Value | 65~85 mg KOH/g |
| pH of 1% Aqueous Solution | 6.0~8.0 | Cloud Point (1% Aqueous Solution) | ≥90°C |
| Moisture | ≤0.5% | Iodine Value | ≤1 |
Application Suggestions
Based on the characteristics of its main component, Octadecylamine Polyoxyethylene Ether AC-1812 is suitable for various industrial scenarios:
- Textile Dyeing and Printing: As a core component of high-temperature and high-pressure leveling agents for polyester, it utilizes its excellent dye dispersibility to solve uneven dyeing problems. The recommended dosage is typically 0.5-2 g/L depending on the dyeing process.
- Plastic Antistatic: As an internal antistatic agent mixed into polyolefin and other plastic substrates, it uses its hydrophilic chain segments to absorb moisture from the air to dissipate static electricity. The recommended addition amount is 0.5%-2% of the resin weight.
- Pesticide Formulations: As an emulsifying and dispersing agent in emulsifiable concentrates and suspension concentrates, its HLB value (approximately 13.5) is suitable for preparing O/W emulsions, effectively enhancing the wetting and spreading of the pesticide solution on crop surfaces.
- Metal Processing: In acidic cleaning solutions or pickling processes, it exhibits cationic properties and adsorbs onto the metal surface, providing corrosion inhibition and protection.
Precautions
- The product is a paste at room temperature. If it solidifies at low temperatures, before use, it can be slowly heated and melted in a warm water bath (below 50°C) and stirred evenly. Direct open flame heating is strictly prohibited.
- This product is a high-concentration nonionic surfactant with slight hygroscopicity. After opening the container, it should be immediately sealed and stored, avoiding prolonged exposure to humid air to prevent moisture absorption and caking.
- Although the product is chemically stable, it should be avoided from direct mixing with strong oxidizers in formulations to prevent side reactions that could affect the product's color and performance.
