The most distinctive feature of Polyether L-64 (Poloxamer 184) compared to conventional nonionic surfactants is its unique integrated foam control and wetting performance. It is a block copolymer of propylene oxide (PO) and ethylene oxide (EO). Its special molecular structure provides excellent substrate wetting and penetration while producing very low foam in the working solution, with extremely rapid defoaming. This allows it to significantly reduce or even eliminate the need for additional defoamers in highly foam-sensitive applications such as high-pressure spray cleaning and metalworking fluid circulation systems, thereby reducing formulation costs and avoiding coating defects (such as craters) caused by defoamers.
Secondly, Polyether L-64 has a very high functional integration. A single product can simultaneously play multiple roles as a defoamer, wetting agent, emulsifier, and dispersant. In industrial cleaning, it effectively degreases and cleans without foam overflowing from the tank; in water-based coatings and inks, it promotes pigment dispersion, prevents flocculation, adjusts dynamic surface tension to improve leveling, and eliminates microfoam. Compared to single-function surfactants, L-64 simplifies formulation design and, due to its broad compatibility with anionic, cationic, and other nonionic surfactants, shows excellent formulation compatibility.
Additionally, Polyether L-64 has excellent mildness and safety. Compared to some APG (alkyl polyglycosides) or traditional fatty alcohol polyether surfactants, as a high-molecular-weight polymer, it is more difficult to penetrate the skin's stratum corneum, resulting in very low irritation. This makes it suitable not only for harsh industrial environments but also safe for use in cosmetics, personal care products, and even pharmaceutical excipients as a mild cleanser, solubilizer, or micellar carrier, achieving full coverage from heavy industry to daily medical fields.
The following key indicators explain its low foam and high stability at a data level (tested at 25°C):
| Key Performance Indicator | Typical Value | Performance Interpretation and Advantages |
|---|---|---|
| HLB Value | 15 | Strong hydrophilicity, can be used as an efficient oil-in-water (O/W) emulsifier and solubilizer |
| Cloud Point (10% Aqueous Solution) | 61°C | Surface activity drops sharply near the cloud point; this characteristic helps control foam and achieve controlled demulsification |
| Foam Characteristics | Low foaming, easy defoaming | Extremely low dynamic foam, no need for additional silicone or polyether defoamers, avoiding the risk of craters |
| Surface Tension (0.1%) | Approx. 32 mN/m | Excellent ability to reduce surface tension, ensuring rapid wetting and penetration of low-energy surfaces and fiber fabrics |
| Critical Micelle Concentration (CMC) | Approx. 0.064% | Low CMC value means micelles form at very low concentrations, enabling solubilization and detergency |
| Kinematic Viscosity (25°C) | Approx. 850 mm²/s | Liquid at room temperature with moderate viscosity, easy to pump and pour during production, easy to handle |
| Pour Point | Approx. -20°C | Excellent low-temperature fluidity, easy to use in cold regions or winter, resistant to solidification and pipeline blockage |
| pH Value (1% Aqueous Solution) | 5.5 - 7.5 | Nearly neutral pH, very friendly to metal substrates, sensitive skin, and weakly acidic formulation systems |
Data source: Measured indicators from Guoli Chemical product database
Based on its multiple advantages, Polyether L-64 is particularly suitable for the following demanding fields:
Polyether L-64 exhibits reverse gelation characteristics, meaning it forms a gel in high-concentration aqueous solutions as temperature increases. Therefore, it is recommended to add it during the cold feeding stage or when the material is cooling down, and it can be efficiently and uniformly dispersed with moderate stirring. If directly preparing high-concentration stock solutions, control the water temperature below its gelation point to maintain fluidity. Wear conventional protective gloves during operation.