According to technical data from Guoli Chemical, the core advantages of Castor Oil Polyoxyethylene Ether EL-10 lie in its **excellent water-in-oil (W/O) emulsification efficiency, strong resistance to acid, alkali, and hard water stability, and broad industrial compatibility**, making it a cost-effective multifunctional nonionic surfactant.
Compared to other similar products, the advantages of EL-10 are mainly reflected in the following dimensions:
### 1. Excellent Water-in-Oil Emulsification Performance
EL-10 has an HLB value of **6.4**, which makes it perform exceptionally well in water-in-oil emulsion systems, a capability that many conventional oil-in-water surfactants (such as high HLB value Peregal or isomeric alcohol ethers) find difficult to achieve.
* **Efficient emulsification of mineral oils and animal/vegetable oils**: It can effectively emulsify a variety of oil phases, particularly suitable for scenarios requiring the formation of stable "water-in-oil" pastes.
* **Strong emulsion stability**: The castor oil hydrophobic chain in its molecular structure provides strong steric hindrance, making the prepared emulsion less prone to layering or demulsification during long-term storage or under high-temperature conditions.
### 2. Outstanding Chemical Stability and Wide Applicability
EL-10's molecular structure does not contain easily hydrolyzable ester bonds, giving it extremely high chemical stability, superior to many emulsifiers containing ester groups (such as Span, Tween series, or certain fatty acid polyoxyethylene esters).
* **Resistant to acid, alkali, and hard water**: It maintains stable surface activity even in complex water conditions with fluctuating pH and containing calcium and magnesium ions, without easy deactivation or calcium soap precipitation.
* **Hydrolysis resistance**: Its chemical structure remains stable during long-term storage in acidic or alkaline aqueous systems, continuously exerting its efficacy.
### 3. Multifunctional Characteristics Combining Lubrication, Dispersion, and Low Foam
Compared to single-function emulsifiers, EL-10 demonstrates the value of "multi-purpose in one agent."
* **Excellent lubrication and fatliquoring properties**: Derived from the characteristics of castor oil molecules, it not only emulsifies in metalworking, textile oils, and leather fatliquoring processes but also provides a smooth and soft feel, reducing friction—a natural oil-like touch that ordinary synthetic alcohol ethers find hard to provide.
* **Efficient dispersion ability**: In paint and ink systems, it exhibits excellent wetting and dispersing effects on organic pigments such as phthalocyanine blue and azo pigments, effectively reducing system viscosity and preventing pigment flocculation and sedimentation.
* **Low foam property**: It is a low-foam product, ideal for use in industrial cleaning and metalworking fluid systems involving circulating pumping and high-pressure spraying.
### 4. Excellent Product Purity and Safety Indicators
* **High active content**: Guoli Chemical's EL-10 has an active matter content **≥99%** and a moisture content **≤1.0%**, ensuring no compromise in product performance.
* **Low acid value**: The product's acid value is **≤1.5 mgKOH/g**, resulting in very low corrosiveness to other components in the formulation and to contacted metal substrates.
* **Non-flammable, low toxicity**: Flash point **>150°C**, classified as non-hazardous, providing a higher safety margin during storage, transportation, and use.
### Key Performance Data Comparison (Based on Guoli Chemical Database)
| Performance Indicator | EL-10 Typical Value | Comparative Advantage Description |
| :--- | :--- | :--- |
| **HLB Value** | **6.4** | Specializes in **water-in-oil (W/O) emulsification**, the ideal choice for such systems. |
| **Active Content** | **≥99%** | High purity, potent performance, requiring less dosage. |
| **pH Value (1% Aqueous Solution)** | 5.0 - 7.0 | Near neutral, **high formulation mildness**, safe for application. |
| **Surface Tension** | Approx. 30-35 mN/m | Good wetting and spreading ability, helping the solution or coating to spread on the surface. |
| **Flash Point** | **>150°C** | Significantly higher than many organic solvent-based auxiliaries, non-flammable, safer for production. |
| **Foaming Characteristics** | **Low Foam** | Can be used in high-pressure cleaning, metalworking fluids, etc., without adding large amounts of defoamer. |
| **Alkali Resistance Stability** | **Resistant to dilute alkali** | Stable in alkaline processes such as mercerizing and degreasing, performance far exceeds general ester-type emulsifiers. |
| **Acid Value** | ≤1.5 mgKOH/g | Low free acid, avoiding potential corrosion to oil phases, pigments, and metal packaging. |
### Application Recommendations
Based on its unique advantages, it is highly recommended for use in the following areas:
* **Pesticide Emulsification**: For formulating high-efficiency lambda-cyhalothrin emulsifiable concentrate, etc., recommended dosage is 5-10% of the total formulation, leveraging its excellent spreading and penetration ability to enhance efficacy.
* **Industrial Hard Surface Cleaning**: Suitable for cleaning heavy oil stains on metal and plastic parts, utilizing its strong emulsification of mineral oils and low-foam characteristics.
* **Solvent-based Coatings and Inks**: As a dispersant for organic pigments, recommended to be dissolved in the solvent before pigment addition, at a dosage of 2%-5% of the pigment weight.
* **Synthetic Fiber Oils**: Provides smoothness and cohesion, reducing breakage and fuzz during spinning.
### Precautions
* **Storage Temperature**: Although the flash point is >150°C and the freezing point is low, the recommended storage temperature is **0 to 40°C**, avoiding long-term high temperatures that may cause color deepening or temporary turbidity.
* **Non-water-soluble Product**: This product is oil-soluble and insoluble in water. When in use, add it directly to the oil phase or pre-mix with oily solvents; do not add directly to the aqueous phase.
