PEG200MO is prepared by esterification of polyethylene glycol 200 and natural oleic acid. Its molecular structure achieves a delicate balance between hydrophilic groups (PEG chain, n≈4) and hydrophobic groups (oleic acid carbon chain). Compared with similar products, the most prominent differentiated advantage lies in its monoester content ≥95%, and diester content ≤3%. This high monoester ratio imparts superior self-emulsifying ability and emulsion stability to the product, as monoester molecules exhibit stronger interfacial adsorption tendency, capable of more efficiently reducing the oil/water interfacial tension (surface tension of 1% aqueous solution is only 30~35 mN/m), while diester by-products tend to enter the oil phase, contributing less to emulsification.
Among similar polyethylene glycol fatty acid ester products, the HLB value of PEG200MO is approximately 8, falling within the critical transition range from water-in-oil (W/O) to oil-in-water (O/W) emulsions. This property allows it to be used alone to prepare W/O emulsions or synergistically with high-HLB emulsifiers to construct stable O/W systems, offering a much wider application scope than competing products with single HLB value ranges. Additionally, this product is derived from natural oleic acid, featuring extremely low irritation (oral LD₅₀ > 5000 mg/kg). Compared with some synthetic fatty acid esters or similar products with higher EO numbers, it has a significant mildness advantage in the cosmetics and personal care fields.
Furthermore, the product exhibits good permeability (canvas settling time ≤ 60 seconds) and low foaming characteristics, making it outstanding in industrial scenarios requiring rapid wetting but not prone to foaming (e.g., metalworking fluids, textile leveling agents), outperforming some high-foaming PEG esters. Its active content is ≥99%, and free alcohol ≤2%, meaning a higher concentration of active ingredients per unit dosage, which can reduce formulation addition levels and achieve a balance between cost and performance.
| Parameter Item | PEG200MO (Guoli Chemical) | Market Reference Value for Similar Products | Advantage Interpretation |
|---|---|---|---|
| Appearance | Light yellow to yellow transparent liquid | Yellow to amber liquid | Lighter color, does not affect final product coloring |
| Monoester Content | ≥95% | Typically 85%~92% | Higher emulsification efficiency, lower dosage required |
| Active Content | ≥99.0% | Typically 95%~98% | More concentrated active ingredients, better cost performance |
| HLB Value | Approximately 8 | Varies from 6 to 9 | Located in the critical region between W/O and O/W, formulation flexibility |
| Surface Tension (1% Aqueous Solution, 25°C) | 30~35 mN/m | 32~40 mN/m | Superior ability to reduce interfacial tension |
| Permeability (Canvas Settling) | ≤60 seconds | Some products >90 seconds | Faster wetting and spreading speed |
| Foam Characteristics | Low foam | Some products have moderate foam | More suitable for low-foam process scenarios |
| Free Alcohol | ≤2% | Typically 2%~5% | Fewer by-products, lower irritation |
| Cloud Point | 40~60°C | Varies greatly with EO number | Moderate cloud point, balancing water solubility and temperature resistance |
| Acute Oral Toxicity (LD₅₀, Rat) | >5000 mg/kg | Similar for similar products | Practically non-toxic grade |
Cosmetics and Personal Care Products: With its excellent emulsifying ability, mildness, low irritation, and high monoester purity, PEG200MO is an ideal primary or auxiliary emulsifier for formulations such as creams, lotions, makeup removers, and body washes. Recommended addition level is generally 2%~8%. Compounding with high-HLB emulsifiers (e.g., PEG-40 Hydrogenated Castor Oil) can achieve broader formulation adaptability and a finer skin feel. The high purity also allows formulators to precisely quantify, avoiding uncertainties introduced by diester impurities.
Metalworking Fluids: As a key component of emulsified cutting fluids and rust inhibitors, this product can quickly form stable emulsions. Its low foaming property avoids foam issues in high-pressure spray systems, and good permeability helps the lubricant quickly reach the cutting interface, improving machining accuracy. Recommended addition level is 5%~15% in the concentrate.
Textile Auxiliaries: In spin finishes and leveling agents, the low foam, high permeability, and excellent dispersibility of PEG200MO can significantly improve fiber spinnability and dye leveling effect. Its easy water solubility facilitates subsequent washing processes, reducing residues.
Pesticide Formulations: In emulsion in water (EW) and microemulsion (ME) formulations, this product effectively promotes uniform dispersion of pesticide active ingredients, improves dilution stability, and enhances the wetting and spreading of the spray liquid on plant leaf surfaces. Recommended dosage is 3%~10% of the total formulation weight.