The core chemical structure of Polyether L-63 (CAS number: 9003-11-6) is a polyoxyethylene (EO)-polyoxypropylene (PO) block copolymer, a triol formed by the polymerization of ethylene oxide and propylene oxide in specific ratios and sequences. In its molecular chain, the hydrophobic polyoxypropylene segment forms the middle block, while the hydrophilic polyoxyethylene segments are located at both ends, creating a typical "hydrophilic-hydrophobic-hydrophilic" triblock structure (i.e., Poloxamer structure). This unique molecular design endows the product with excellent surface activity.
As a nonionic surfactant, the molecular weight, EO/PO ratio, and terminal hydroxyl functionality of Polyether L-63 are precisely controlled, giving it good emulsifying, wetting, dispersing, and leveling properties. Its terminal reactive hydroxyl groups can react with isocyanates, which is an important chemical basis for its use as a polyurethane raw material.
The product appears as a colorless to slightly yellow transparent viscous liquid, exhibits good resistance to acids, alkalis, and hard water, is classified as practically non-toxic, non-irritating to the skin, and readily biodegradable, offering both performance advantages and environmental safety in industrial applications.
| Parameter | Value |
|---|---|
| Product Name | Polyether L-63 |
| Alias | Polyether Polyol L-63, Poloxamer |
| CAS Number | 9003-11-6 |
| Product Type | Nonionic Polyether Polyol |
| Main Components | Polyoxyethylene-polyoxypropylene block copolymer (EO-PO-EO triblock structure), optionally with minor antioxidants and residual trace catalysts. |
| Appearance | Colorless to slightly yellow transparent viscous liquid |
| Ionic Type | Nonionic |
| Acute Oral Toxicity LD50 | >5000 mg/kg (Practically non-toxic) |
| Skin Irritation | Non-irritating |
| Biodegradability | Readily biodegradable (OECD 301F, degradation >60% ThOD) |
| Flash Point | >200°C (Non-flammable liquid) |
Polyether L-63, leveraging its polyoxyethylene-polyoxypropylene block copolymer chemical structure, excels in several fields:
Polyether L-63 is classified as a non-hazardous substance, but it is recommended to wear chemical protective gloves and safety goggles during handling, avoiding eye contact (which may cause mild temporary irritation). Store at temperatures between 5–40°C in tightly sealed containers, away from incompatible materials such as strong oxidizers. Refer to the Safety Data Sheet (SDS) for specific safe handling procedures.