According to the technical data of Guoli Chemical, compared with similar octylphenol ethoxylate products (such as OP-7, OP-10, OP-21, OP-30, OP-40, etc.), the core advantage of OP-13 octylphenol ethoxylate lies in its optimal balance of emulsification efficiency and wetting/penetrating ability, making it outstanding in formulations requiring efficient degreasing, stable emulsification, and high penetrating performance.
### Detailed Description
OP series products are all condensates of octylphenol and ethylene oxide (EO). With the increase of EO addition number (n value), the product performance exhibits regular changes:
- Low EO products (such as OP-7, OP-10): Weak hydrophilicity, low HLB value (OP-7 is 11.7, OP-10 is 13.5), mainly dispersed or emulsified in water, fast wetting and penetrating speed, but relatively limited emulsion stability.
- High EO products (such as OP-21, OP-30, OP-40): Strong hydrophilicity, high HLB value (16-18), easily soluble in water, excellent emulsification and dispersion performance, but wetting and penetrating speed decreases significantly (OP-21 penetration time > 180 seconds, OP-30 > 300 seconds), and cloud point increases, poor low-temperature fluidity.
- OP-13 (n≈13): Located in the "golden zone" of EO addition number, it combines the fast wetting and penetrating ability of low/medium EO products with the strong emulsification and dispersion ability of high EO products. It is the most balanced overall performance product, especially good at quickly stripping heavy oil stains and stably emulsifying and dispersing them, preventing secondary deposition of oil.
### Core Parameter Comparison Table
| Product Model | EO Addition Number (n) | HLB Value | Cloud Point (℃) | Penetrating Ability (1% Aqueous Solution) | Foam Characteristics | Core Performance Positioning |
|---------|------------|-------|---------|-----------------|---------|-------------|
| OP-7 | 7 | 11.7 | 25-35 | Extremely fast | Low foam | Strong wetting and penetration, weak emulsification |
| OP-10 | 10 | 13.5 | 65-70 | About 120 seconds | Medium foam | Balanced penetration and emulsification |
| OP-13 | 13 | About 14.5 | About 80-90 | About 80 seconds | Medium foam | High-efficiency emulsification + fast penetration |
| OP-21 | 21 | 16 | ≥100 | >180 seconds | Medium-low foam | High-temperature emulsification and dispersion |
| OP-30 | 30 | 17 | >100 | >300 seconds | Low foam | Strong emulsification and stability |
| OP-40 | 40 | 17-18 | >100 | Relatively slow | Low foam | High-temperature strong emulsifier |
*Note: The HLB value, cloud point, and penetrating ability data of OP-13 are typical values reasonably derived from its EO addition number and technical data of similar products.*
### Application Advantages and Suggestions
1. Industrial and household cleaning fields: OP-13 is the preferred emulsifier for high-efficiency heavy-duty degreasers. Compared with OP-10, it has stronger oil emulsification ability and more stable wash liquor; compared with OP-21, etc., it has superior fast penetration and deep cleaning ability for fabrics and hard surfaces. Recommended dosage: 2%-10%.
2. Textile printing and dyeing processing: As a scouring agent and penetrating agent, OP-13 can quickly penetrate into the fiber interior, efficiently remove natural oil and wax, and its excellent emulsification ensures that the removed impurities are stably dispersed in the working solution. When used as a leveling agent, its moderate retarding ability also ensures even dyeing.
3. Pesticide emulsifiable concentrate and microemulsion: The emulsifying ability of OP-13 is sufficient to ensure the stable self-emulsification of pesticide emulsifiable concentrate, and its penetrating ability enhances the spreading and adhesion of the liquid on plant leaf surfaces, improving efficacy. Its HLB value (about 14.5) is particularly suitable for formulating emulsifiable concentrates requiring medium-high HLB values.
4. Metalworking fluids: While providing excellent emulsifying and lubricating performance, OP-13 can quickly wet the surface of workpieces and tools, effectively carrying away heat and metal chips, suitable for formulating cutting fluids with both cleaning and lubricating properties.
### Precautions
- Although OP-13 has excellent comprehensive performance, high EO products (such as OP-30, OP-40) are still more professional choices when extremely high emulsion stability (such as high-temperature asphalt emulsification) or ultra-long stable emulsion is required.
- All alkylphenol ethoxylate products have potential environmental impacts. Use and discharge must strictly comply with relevant regulations, and priority should be given to considering the possibility of substitution or restriction in final product formulations.
