High Elastic Polyether Polyurethane
Overview
Polyether polyurethane elastomer is a thermosetting polymer formed by reacting polyether polyols with diisocyanates. Its molecular structure features alternating soft (polyether) and hard (urethane) segments, granting unique elasticity and toughness. Developed in the mid-20th century, it bridges the gap between rubber and plastic properties. Compared to polyester-based PU, polyether variants exhibit superior hydrolysis resistance and low-temperature flexibility, making them ideal for damp environments. The material is typically processed via casting, injection molding, or extrusion, with hardness adjustable from Shore A 60 to D 80.
Physical and Chemical Properties
The material demonstrates exceptional tensile strength (20-50 MPa) and elongation at break (300-600%). Its rebound resilience exceeds 90%, outperforming most rubbers. The polyether backbone provides inherent resistance to microbial attack and moisture, with operating temperatures ranging from -40°C to +100°C. Chemically, it resists oils, greases, and dilute acids/alkalis but degrades in strong oxidizing agents. Its dielectric properties make it suitable for electrical insulation. The abrasion resistance (Taber test) is 10-40 times better than natural rubber, critical for high-wear applications.
Main Applications
In automotive industries, it's used for suspension bushings, CVJ boots, and hydraulic seals due to its vibration damping. Construction applications include bridge expansion joints and pipe linings where flexibility and weather resistance are paramount. Industrial uses dominate with conveyor belts, printing rollers, and mining screen panels. Medical grades (ISO 10993 compliant) serve in prosthetic components and catheter tubing. Emerging applications include 3D-printed flexible prototypes and anti-vibration mounts for precision machinery.
Safety and Storage
Fully cured elastomers pose minimal hazard, but uncured components (isocyanates) require handling with nitrile gloves and ventilation. Dust from machining may irritate respiratory tracts—use local exhaust ventilation. Store raw materials in sealed containers with nitrogen blankets to prevent moisture absorption. Finished products should avoid prolonged UV exposure to prevent surface chalking. Shelf life for prepolymers is typically 6-12 months at <25°C. Disposal should follow local regulations for thermoset plastics.
B2B Procurement Guide
Specify technical parameters: hardness (Shore), tensile/tear strength, compression set (ASTM D395), and dynamic load capacity. For food/medical use, request FDA or EU 10/2011 compliance certificates. Major global suppliers include Covestro, BASF, and Huntsman, with regional producers in Asia offering cost-competitive options. Bulk orders (>1 ton) typically enjoy 10-15% discounts. Lead times range from 2-6 weeks for standard grades. Consider third-party testing (SGS/BV) for critical applications.
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