Octadecylamine Polyoxyethylene Ether AC-1820 (CAS: 26635-75-6) is a nonionic surfactant with pH-dependent ion conversion characteristics. Under acidic conditions, it can be protonated into a cationic type, exhibiting excellent emulsifying, dispersing, wetting, and leveling capabilities. This product appears as a light yellow to yellow paste or waxy solid at room temperature (melting point approx. 35°C). Before use, it is usually necessary to heat it to a flowable state or pre-disperse it with warm water, then add it into the formulation system and stir evenly.
In different applications, the addition method and process point of AC-1820 vary. In the textile dyeing and printing field, it is typically added directly to the dye bath. In pesticide formulations, it needs to be compounded with other emulsifiers and participate in the oil phase pre-mixing. In industrial cleaning and metalworking fluids, it can be blended with other surfactants and auxiliaries. When used as an antistatic agent, it can be applied to fiber or plastic surfaces via padding, spraying, or internal addition. The specific dissolution and feeding method should be determined through small-scale trials based on the actual formulation process.
Special attention is required: Under acidic conditions, AC-1820 exhibits cationic properties and should avoid direct mixing with anionic surfactants or auxiliaries to prevent precipitation or failure due to ionic interaction. If anionic components are needed in the formulation, it is recommended to compound under neutral or alkaline conditions, or use a stepwise addition process to avoid compatibility issues.
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Appearance | Light yellow to yellow (paste/waxy solid) | Ionic type | Nonionic (cationic under acidic conditions) |
| Active content | ≥99% | HLB value | 15.4 |
| Tertiary amine content | ≥95% | Amine value | 50~60 mgKOH/g |
| Hydroxyl value | Approx. 98 mgKOH/g | Cloud point (1% aqueous solution) | >100°C |
| pH of 1% aqueous solution | 6.0~8.0 | Moisture content | ≤0.5% |
| Melting point | Approx. 35°C | Density (25°C) | Approx. 1.04 g/cm³ |
| Surface tension (1%, 25°C) | Approx. 35 mN/m | Critical micelle concentration (CMC) | Approx. 60 mg/L (25°C) |
| Foam characteristics | Low foam | Penetration power (canvas sinking method) | >200 seconds |
| Solubility | Easily soluble in water and organic solvents | Packaging specifications | 50kg/200kg plastic drum, IBC tote |
Above data source: Guoli Chemical Product Database
The following are recommended dosage ranges for each field based on industry practice experience (final dosage should be determined through small-scale testing):
| Application Field | Recommended Dosage | Usage Instructions |
|---|---|---|
| Acid dye leveling agent (wool/nylon) | 0.5%~1.5% (owf) | Add before dye bath temperature rise, circulate evenly with dye; provides optimal leveling effect under acidic conditions |
| Pesticide emulsifier (EC/EW) | 2%~8% (of total formulation) | Use in combination with other emulsifiers, participate in oil phase pre-mixing before emulsification; significantly improves emulsion stability and spray liquid wetting/spreading |
| Industrial cleaner | 1%~5% (of total working solution) | Compound with builders, corrosion inhibitors, etc.; provides both emulsification and metal corrosion inhibition in acidic cleaning systems |
| Metalworking fluids (cutting fluids/grinding fluids) | 0.5%~3% (of total concentrate) | Add as corrosion inhibition and lubrication component; forms protective film on metal surface, prolongs tool and workpiece life |
| Synthetic fiber/plastic antistatic agent | 0.5%~2% (on weight of fiber or resin) | Padding method: prepare 0.5%~2% aqueous solution, pad and dry; Internal addition method: add before resin pelletizing or spinning and disperse evenly |
| Mineral flotation agent | 50~200 g/t (ore) | Add as selective collector or auxiliary frother in flotation process; dosage optimized based on ore type and particle size distribution |
| Asphalt emulsifier | 1%~3% (of total emulsified asphalt) | Dissolve in acidic aqueous phase and emulsify with hot asphalt using a colloid mill to produce stable cationic emulsified asphalt |
The above recommended dosages are industry general reference ranges; the specific dosage should be determined based on actual formulation and process conditions through small-scale and pilot-scale verification.