Overview
Polyether Polyurethane White Material is the polyol component in two-component polyurethane systems, typically reacting with isocyanates (the 'black material') to form polyurethane polymers. As a key industrial chemical, it's formulated with polyether polyols, catalysts, blowing agents, and additives. This material is fundamental in producing flexible to semi-rigid polyurethane foams used across industries. Its quality directly impacts the final product's mechanical properties, density, and thermal performance. Manufacturers offer various grades tailored for specific applications and processing methods.
Physical and Chemical Properties
The material typically appears as a viscous liquid with low volatility. Its viscosity ranges between 500-3000 mPa·s at 25°C, depending on formulation. The hydroxyl value (OH#), a critical parameter, usually falls between 200-600 mg KOH/g. Chemically, it contains reactive hydroxyl groups that undergo polyaddition with isocyanates. The reaction is exothermic and produces polyurethane polymers with varying crosslink densities. Shelf life is generally 6-12 months when stored properly, though moisture absorption can degrade performance over time.
Main Applications
Primary use is in polyurethane foam production for insulation panels in construction and refrigeration. The material's excellent thermal resistance makes it ideal for cold chain logistics and building energy efficiency applications. In industrial settings, it's used for cushioning materials, automotive interior parts, and sound insulation. Specialty formulations serve as binders for foundry sands or components in adhesive systems. Recent developments include flame-retardant versions for stricter safety compliance.
Safety and Storage
While not classified as highly toxic, the material requires careful handling due to flammability (flash point typically >100°C) and potential skin irritation. Use PPE including gloves and goggles, and ensure adequate ventilation during processing. Storage drums must remain tightly sealed to prevent moisture absorption, which causes CO2 formation during reaction. Bulk storage tanks should use dry air or nitrogen padding. In case of spills, absorb with inert material and dispose following local regulations.
B2B Procurement Guide
Industrial buyers should specify technical parameters including hydroxyl value, viscosity, water content, and functionality. Batch-to-batch consistency is critical for production stability. Consider supplier certifications (ISO, REACH) and request technical datasheets with full test methods. For large-volume procurement, negotiate based on drum/tank quantities and verify logistics capabilities. Quality control should include incoming inspection of key parameters and reaction testing with standard isocyanates.
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