Overview
Polyether polyol is a hydroxyl-terminated polymer formed by the ring-opening polymerization of alkylene oxides (e.g., propylene oxide, ethylene oxide) initiated by polyhydric alcohols or amines. It serves as the primary soft segment in polyurethane chemistry, accounting for approximately 75% of global polyol consumption. Industrial production utilizes catalytic processes (typically KOH or DMC catalysts) to control molecular weight distribution and functionality. These polyols are classified by their base monomer (PPG for propylene oxide, PEG for ethylene oxide) and functionality (diols, triols, or higher). The choice of initiator (glycerol, sucrose, sorbitol) and oxide ratio determines key characteristics like reactivity, hydrophilicity, and crosslink density in final PU products.
Physical and Chemical Properties
Polyether polyols exhibit viscosity ranging from 200–10,000 mPa·s at 25°C, inversely proportional to their hydroxyl value (20–800 mg KOH/g). Their glass transition temperature (Tg) typically falls between -70°C to -30°C, making them ideal for flexible applications. The presence of ether linkages (-C-O-C-) provides hydrolytic stability compared to polyester polyols. Key reactivity stems from terminal hydroxyl groups, which undergo polyaddition with diisocyanates (e.g., MDI, TDI) to form urethane linkages. Ethylene oxide-capped variants (EO-tipped) demonstrate enhanced water solubility due to increased primary OH content (>70%), while PO-dominated types offer better hydrophobic properties. Most commercial grades have acid values <0.1 mg KOH/g to prevent catalysis interference during PU formation.
Main Applications
Flexible polyurethane foam (FPF) consumes ~60% of polyether polyol output, where triols (MW 3,000–6,000) create the elastic matrix for mattresses and automotive seating. Rigid foams employ higher-functionality polyols (sucrose/sorbitol-initiated, MW 400–1,000) to form closed-cell insulation for construction and appliances. In CASE applications (Coatings, Adhesives, Sealants, Elastomers), specialized grades with precise OH values (50–200) provide tailored hardness and elongation. Cast elastomers use low-unsaturation polyols (<0.02 meq/g) for superior mechanical properties, while spray polyurea coatings require fast-reacting, amine-terminated derivatives. Emerging uses include bio-based polyols from renewable resources (castor oil, soybean) to meet sustainability demands.
Safety and Storage
Polyether polyols are generally classified as non-hazardous (GHS classification not required), but prolonged skin contact may cause mild irritation due to residual catalysts. Use nitrile gloves and safety goggles when handling bulk quantities. Ensure adequate ventilation to prevent vapor accumulation in confined spaces. Storage tanks should be nitrogen-purged to prevent oxidative degradation, especially for EO-rich grades prone to peroxide formation. Maintain temperature below 40°C to avoid viscosity reduction and potential leakage. Shelf life typically exceeds 12 months when stored properly in carbon steel or polyethylene containers. Test moisture content (<0.05% wt) before processing to prevent foam instability or side reactions with isocyanates.
B2B Procurement Guide
Industrial buyers should specify: 1) Hydroxyl value (accuracy ±5 mg KOH/g), 2) Functionality (2–8), 3) EO/PO ratio (affects hydrophilicity), 4) Unsaturation level (<0.07 meq/g for high-performance elastomers), and 5) Viscosity at 25°C (impacts processing). For foam applications, verify compatibility with blowing agents (water, pentane, HFCs) and catalysts (amines, tin compounds). Request technical datasheets with GPC analysis for molecular weight distribution. Bulk shipments (ISO tanks, drums) typically offer 5–15% cost savings versus IBC totes. Consider regional producers (e.g., Covestro in EU, Dow in Americas, Wanhua in Asia) for logistics efficiency. Sample testing under actual production conditions is strongly recommended before large orders.
Related Manufacturers
- 主营：回收颜料、回收白凡士林、回收日化原料、回收聚氨酯原料、回收聚醚多元醇
- 主营：表面活性剂、十六碳二酸、防锈添加剂、聚醚多元醇DL、椰油醇醚硫酸钠、二硬脂酸乙烯酯
- 主营：聚醚多元醇、食品级聚合氯化铝、聚丙烯酰胺、河道治理锁磷剂
- 主营：阻燃剂、催化剂、洗涤剂、聚醚多元醇POP36、硫酸铵、醋酸镧、起泡剂、清洗剂、碳酸钙、抗氧剂、灭火剂、交联剂、粘合剂、封头剂、丙二醇、酸二氢铝、聚乙烯醇、对氯溴苯、生物试剂、息香乙醚、异戊二醇、香精香料、4-丁二醇、2-氯丙烯腈、2-己基癸酸、二甲胺硼烷
- 主营：环氧油漆、油漆涂料、库存油漆、油漆回收、聚醚回收、树脂回收、回收硅胶、橡胶回收、回收颜料、石蜡回收、助剂回收、染料回收、钛白粉回收、白蜂蜡回收、回收聚氨酯、水性油漆、废旧树脂、化工油漆、固体废蜡、库存染料、过期油漆、聚乙烯蜡、库存化工、丙烯酸树脂、日化原料