PEG400DO (Polyethylene Glycol 400 Dioleate) is a nonionic surfactant, appearing as a light yellow to amber liquid. Its HLB value is around 8.5, making it an oil-soluble emulsifier, more suitable for preparing water-in-oil (W/O) emulsions, or for use in combination with high-HLB emulsifiers in oil-in-water (O/W) systems. Due to the ester bonds in its molecular structure, this product is not resistant to strong alkaline environments and may hydrolyze in formulations with excessively high pH. Therefore, the acid-base conditions of the system should be controlled during use.
In practical applications, the dosage depends on the specific function required—whether used as a primary emulsifier, co-emulsifier, or wetting dispersant. General recommended dosage ranges are as follows: When used as a primary emulsifier in metalworking fluids and industrial lubricants, the recommended dosage is 5% to 15%; as a lubricating and antistatic component in textile oils, the recommended dosage is 3% to 10%; as a mild emulsifying emollient in personal care products (such as facial cleansers and makeup removers), the recommended dosage is 2% to 8%; as a dispersant and spreading agent in agrochemical formulations (emulsifiable concentrates, aqueous emulsions), the recommended dosage is 1% to 5%. The above dosage ranges are based on common industry reference values; actual formulations need to be optimized through experimentation.
| Parameter | Reference Value | Parameter | Reference Value |
|---|---|---|---|
| Appearance | Light yellow to amber liquid | HLB Value | About 8.5 |
| Ionic Type | Nonionic | Active Content | ≥99% |
| Density (25°C) | 1.11~1.13 g/cm³ | pH Value (1% Aqueous Solution) | 5.0~7.5 |
| Saponification Value | 116~126 mgKOH/g | Acid Value | ≤5.0 mgKOH/g |
| Hydroxyl Value | ≤15 mgKOH/g | Kinematic Viscosity (25°C) | 100~200 mm²/s |
| Cloud Point (1% Aqueous Solution) | 40~50°C | Flash Point | >200°C |
| Moisture Content | ≤0.5% | Solubility | Dispersible in water, soluble in organic solvents such as ethanol and acetone |
Metalworking Fluids/Industrial Lubricants: PEG400DO serves as an efficient oil-soluble emulsifier, helping base oils form stable emulsions in the aqueous phase. The recommended dosage is 5% to 15%, and it can be used in combination with anionic emulsifiers to enhance emulsion stability. This product also exhibits synergistic anti-corrosion properties and boundary lubrication performance, helping to extend tool life and improve workpiece surface finish.
Textile Oils: As a key component of synthetic fiber spinning oils, PEG400DO provides smoothness and antistatic capabilities, reducing friction damage during fiber drawing and winding. The recommended dosage is 3% to 10%, and it can be blended with antistatic agents and bundling agents to improve the feel of the final product and ensure smooth processing.
Personal Care Products: Suitable for formulations such as facial cleansers, body washes, makeup removers, and shampoos, it acts as a mild emulsifying emollient. The recommended dosage is 2% to 8%. It effectively removes dirt without excessive degreasing, leaving the skin feeling silky after washing. Due to its low HLB value, it is recommended to be used in combination with high-HLB emulsifiers (such as PEG-40 Hydrogenated Castor Oil) in O/W cleansing formulations.
Agrochemical Formulations: Used in pesticide emulsifiable concentrates (EC), aqueous emulsions (EW), and microemulsions (ME) to enhance the dispersion stability of active ingredients and their wetting and spreading ability on target surfaces. The recommended dosage is 1% to 5%, which helps active ingredients disperse uniformly, improving efficacy and utilization rate.