Polyether L-64 (CAS No.: 9003-11-6), chemical name: polyoxyethylene-polyoxypropylene block copolymer, also known as Poloxamer 184, molecular formula: HO(C₂H₄O)ₓ(C₃H₆O)y(C₂H₄O)ₓH, average molecular weight of about 2900. This product is formed by block copolymerization of propylene oxide (PO) and ethylene oxide (EO). Its unique ABA-type triblock structure imparts excellent interfacial activity and broad compatibility, making it a representative model in the poloxamer series with a balanced hydrophilicity-lipophilicity.
From a physical property perspective, Polyether L-64 is a liquid at room temperature, with a pour point of about -20°C, maintaining good fluidity in low-temperature environments. Its density is approximately 1.06 g/cm³, refractive index between 1.458 and 1.460 (25°C), dynamic viscosity (low shear) of about 900 mPa·s, and kinematic viscosity of about 850 mm²/s. The flash point is greater than 230°C (closed cup), indicating a high flash point substance with low fire risk under normal operating conditions. The product is somewhat hygroscopic and should be stored sealed in a cool, dry place.
| Parameter | Value |
|---|---|
| Product Name | Polyether L-64 / Pluronic L64 (Poloxamer 184) |
| CAS No. | 9003-11-6 |
| Ionic Type | Nonionic |
| Appearance (Room Temperature) | Colorless to pale yellow transparent liquid |
| Molecular Formula | HO(C₂H₄O)ₓ(C₃H₆O)y(C₂H₄O)ₓH |
| Average Molecular Weight | Approx. 2900 |
| HLB Value | 15 |
| Cloud Point (10% Aqueous Solution) | 61°C |
| Active Content | ≥ 99% |
| pH Value (1% Aqueous Solution) | 5.5 - 7.5 |
| pH Value (5% Aqueous Solution) | 5.5 - 7.5 |
| Density | Approx. 1.06 g/cm³ |
| Kinematic Viscosity (25°C) | Approx. 850 mm²/s |
| Low Shear Viscosity (25°C) | Approx. 900 mPa·s |
| Refractive Index (25°C) | 1.458 - 1.460 |
| Flash Point (Closed Cup) | > 230°C |
| Pour Point | Approx. -20°C |
| Surface Tension (0.1% Aqueous Solution, 25°C) | Approx. 32 mN/m |
| Critical Micelle Concentration CMC (25°C) | Approx. 0.064% |
| Hydroxyl Value | 28 - 36 mgKOH/g |
| Acid Value | ≤ 0.5 mgKOH/g |
| Saponification Value | ≤ 1 mgKOH/g |
| Iodine Value | ≤ 1 |
| Moisture Content | ≤ 0.5% |
| Heavy Metal Content | ≤ 10 mg/kg |
| Arsenic Content | ≤ 2 mg/kg |
| Solubility | Easily soluble in water, ethanol, ether, and other organic solvents |
| Foaming Characteristics | Low foaming |
| Alkali Resistance | Good |
| Hygroscopicity | Hygroscopic |
| Chemical Stability | Stable under general conditions; avoid strong oxidizers |
Note: The above data are from the Guoli Chemical product database. Parameters such as amine value, tertiary amine value, free phosphoric acid, monoester/diester content, unsaturation, and penetrating power are not applicable for this product (shown as "None" or "Not available").
Polyether L-64 has an HLB value of 15 and a cloud point of 61°C, indicating strong hydrophilicity. It is suitable as an emulsifier for O/W emulsions and as a wetting and dispersing agent in aqueous systems. Its low-foaming property makes it outstanding in high-pressure spray cleaning, CIP online cleaning, and circulating systems. It is recommended to add it during the cooling or dilution stage of formulation development. Moderate stirring ensures uniform dispersion. The specific dosage should be determined through experiments based on the actual application.
Typical dosage reference (adjust according to actual formulation): as a wetting and dispersing agent, 0.1%-1.0%; as an emulsifier, 1%-5%; as a defoaming aid, 0.05%-0.5%.