Overview
Butanol polyether is a specialized polyether polyol synthesized by the alkoxylation of butanol with ethylene oxide (EO), propylene oxide (PO), or a combination of both. It serves as a crucial intermediate in polyurethane (PU) production, offering tunable properties based on the alkoxide ratio and polymerization degree. This polyether is valued for its low viscosity, controlled hydroxyl functionality, and compatibility with other PU components. Industrial grades are tailored for specific applications, with variations in molecular weight and EO/PO content influencing foam flexibility, adhesion, and chemical resistance.
Physical and Chemical Properties
Butanol polyether typically appears as a colorless to slightly yellow viscous liquid with a mild odor. Its density ranges between 1.02–1.08 g/cm³, and it exhibits negligible volatility at room temperature. The hydroxyl value (OHV) varies from 20 to 300 mg KOH/g, directly affecting reactivity in PU formulations. Key chemical properties include stability under neutral conditions but susceptibility to hydrolysis in acidic or alkaline environments. It reacts exothermically with isocyanates to form urethane linkages. Solubility is high in toluene, acetone, and dichloromethane but poor in water due to its hydrophobic backbone.
Main Applications
The primary use of butanol polyether is in polyurethane systems, where it acts as a flexible chain extender or crosslinker. In foam production, it enhances elasticity and reduces brittleness, making it ideal for mattress and cushion manufacturing. Coatings and adhesives benefit from its adhesion-promoting properties and moisture resistance. Industrial sealants and elastomers incorporate this polyether for its durability and low-temperature flexibility. Niche applications include hydraulic fluids and lubricant additives, leveraging its thermal stability and shear resistance.
Safety and Storage
Butanol polyether is classified as a flammable liquid (Flash point >100°C) and should be stored in tightly sealed containers away from ignition sources. Prolonged skin contact may cause mild irritation, necessitating gloves and protective clothing during handling. Storage areas must be well-ventilated and equipped with spill containment measures. Incompatible materials include strong oxidizers and acids. Shelf life typically exceeds 12 months when stored below 30°C in original packaging.
B2B Procurement Guide
When sourcing butanol polyether, specify technical parameters such as hydroxyl value (OHV), molecular weight, and EO/PO ratio to match your application. Reputable suppliers provide certificates of analysis (CoA) detailing batch-specific properties. Bulk procurement (drums or isotanks) reduces costs for large-scale PU manufacturers. Request samples for compatibility testing, especially for coatings or adhesives. Lead times vary; seasonal demand in furniture and automotive industries may affect availability.
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