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Elastomer polyester polyol is a high-performance polyol engineered for thermoplastic polyurethane (TPU) and cast elastomers, delivering a unique balance of excellent elasticity and abrasion resistance. Its linear or slightly branched structure (molecular weight 500–4,000 g/mol) is tailored to optimize chain flexibility (from long alkyl segments) and cross-link density (from controlled functionality), ensuring low melt viscosity for efficient processing.
Key properties include a hydroxyl number of 50–120 mg KOH/g (indicating moderate reactivity), acid value ≤2.0 mg KOH/g (minimizing isocyanate consumption), and tensile strength ≥34 MPa in cured TPU systems. These attributes make it suitable for dynamic applications requiring repeated deformation and recovery, such as industrial seals, footwear components, and flexible hoses.
Superior Mechanical Properties
Elastic Recovery: Achieves 96.8% recovery from 200% strain within 5 seconds (ASTM D412), outperforming polyether polyols (typically 85–90% recovery). This makes it ideal for dynamic applications like cable sheaths and shock absorbers that undergo frequent flexing.
Wear Resistance: Exhibits abrasion loss ≤50 mg in Taber tests (CS-10 wheel, 1 kg load, 1,000 cycles), surpassing polyether-based elastomers (60–80 mg loss) in industrial rollers and conveyor belts.
Chemical Resistance
The ester backbone resists hydrocarbon oils, fuels, and polar solvents (e.g., acetone, diesel). Cured elastomers show no swelling (>5% weight gain) after 168 hours of immersion in ASTM No. 3 oil, making them suitable for automotive seals (engine gaskets, fuel lines) and industrial hoses (hydraulic fluid transfer).
Processing Efficiency
With low melt viscosity (≤12,000 cps at 75°C), it enables high-speed extrusion (20–30 m/min) and injection molding of complex geometries (e.g., gear teeth, valve stems). This reduces cycle times by 20–25% compared to high-viscosity polyols, lowering production costs.
Customizable Formulations
Available in dihydroxy (linear, for high elongation) and trihydroxy (slightly branched, for higher modulus) grades, it supports tailored hardness (Shore A 85–95) and elongation at break (600–700%). Low-molecular-weight grades (500–1,000 g/mol) enhance flexibility, while high-molecular-weight grades (2,000–4,000 g/mol) boost tensile strength.
Thermoplastic Polyurethane (TPU)
Footwear: Used in high-performance soles (running shoes, hiking boots) to enhance shock absorption (energy return ≥65%) and tensile strength (≥30 MPa), reducing wear during intense use.
Medical Devices: USP Class VI-compliant grades are used in catheters and orthopedic braces, offering biocompatibility (no cytotoxicity, ISO 10993) and kink resistance (≥10,000 flex cycles without failure).
Cast Elastomers
Industrial Components: Manufactures sieve plates (mining) and paper machine rollers with compressive strength ≥15 MPa (ASTM D695) and tear resistance ≥110 kN/m (ASTM D624), withstand heavy loads and friction.
Automotive Suspension: Provides damping performance in bushings and mounts, maintaining resilience across -40°C to 80°C (no hardening or softening, ASTM D2240).
Coatings and Adhesives
Floor Coatings: Two-component PU coatings achieve pencil hardness ≥3H (ASTM D3363) and resist scratches (Taber abrasion ≤20 mg/1,000 cycles), ideal for warehouse floors and gymnasiums.
Metal Bonding: PUR adhesives formulated with this polyol exhibit shear strength ≥2.5 MPa (ASTM D1002) on aluminum composites, used in automotive body panels and HVAC ducting.
Container: Store in airtight glass or aluminum containers to prevent moisture absorption (which can react with isocyanates), with nitrogen blanketing recommended for large-volume storage.
Conditions: Maintain temperatures between 5–25°C and humidity ≤60% in a dark, cool area; avoid UV light (which degrades ester linkages) and oxidizing agents (e.g., chlorine).
Handling: Use within 12 months of production; agitate gently before use to ensure homogeneity. Avoid contact with strong bases, which may cause hydrolysis.
Parameter | Value |
Molecular Weight | 500–4,000 g/mol |
Hydroxyl Number | 50–120 mg KOH/g |
Tensile Strength | 34–40 MPa |
Elongation at Break | 600–700% |
Hardness (Shore A) | 85–95 |
Water Absorption | ≤0.5% (24 hours, ASTM D570) |
Viscosity (75°C) | ≤12,000 cps |
Elastomer polyester polyol is a high-performance polyol engineered for thermoplastic polyurethane (TPU) and cast elastomers, delivering a unique balance of excellent elasticity and abrasion resistance. Its linear or slightly branched structure (molecular weight 500–4,000 g/mol) is tailored to optimize chain flexibility (from long alkyl segments) and cross-link density (from controlled functionality), ensuring low melt viscosity for efficient processing.
Key properties include a hydroxyl number of 50–120 mg KOH/g (indicating moderate reactivity), acid value ≤2.0 mg KOH/g (minimizing isocyanate consumption), and tensile strength ≥34 MPa in cured TPU systems. These attributes make it suitable for dynamic applications requiring repeated deformation and recovery, such as industrial seals, footwear components, and flexible hoses.
Superior Mechanical Properties
Elastic Recovery: Achieves 96.8% recovery from 200% strain within 5 seconds (ASTM D412), outperforming polyether polyols (typically 85–90% recovery). This makes it ideal for dynamic applications like cable sheaths and shock absorbers that undergo frequent flexing.
Wear Resistance: Exhibits abrasion loss ≤50 mg in Taber tests (CS-10 wheel, 1 kg load, 1,000 cycles), surpassing polyether-based elastomers (60–80 mg loss) in industrial rollers and conveyor belts.
Chemical Resistance
The ester backbone resists hydrocarbon oils, fuels, and polar solvents (e.g., acetone, diesel). Cured elastomers show no swelling (>5% weight gain) after 168 hours of immersion in ASTM No. 3 oil, making them suitable for automotive seals (engine gaskets, fuel lines) and industrial hoses (hydraulic fluid transfer).
Processing Efficiency
With low melt viscosity (≤12,000 cps at 75°C), it enables high-speed extrusion (20–30 m/min) and injection molding of complex geometries (e.g., gear teeth, valve stems). This reduces cycle times by 20–25% compared to high-viscosity polyols, lowering production costs.
Customizable Formulations
Available in dihydroxy (linear, for high elongation) and trihydroxy (slightly branched, for higher modulus) grades, it supports tailored hardness (Shore A 85–95) and elongation at break (600–700%). Low-molecular-weight grades (500–1,000 g/mol) enhance flexibility, while high-molecular-weight grades (2,000–4,000 g/mol) boost tensile strength.
Thermoplastic Polyurethane (TPU)
Footwear: Used in high-performance soles (running shoes, hiking boots) to enhance shock absorption (energy return ≥65%) and tensile strength (≥30 MPa), reducing wear during intense use.
Medical Devices: USP Class VI-compliant grades are used in catheters and orthopedic braces, offering biocompatibility (no cytotoxicity, ISO 10993) and kink resistance (≥10,000 flex cycles without failure).
Cast Elastomers
Industrial Components: Manufactures sieve plates (mining) and paper machine rollers with compressive strength ≥15 MPa (ASTM D695) and tear resistance ≥110 kN/m (ASTM D624), withstand heavy loads and friction.
Automotive Suspension: Provides damping performance in bushings and mounts, maintaining resilience across -40°C to 80°C (no hardening or softening, ASTM D2240).
Coatings and Adhesives
Floor Coatings: Two-component PU coatings achieve pencil hardness ≥3H (ASTM D3363) and resist scratches (Taber abrasion ≤20 mg/1,000 cycles), ideal for warehouse floors and gymnasiums.
Metal Bonding: PUR adhesives formulated with this polyol exhibit shear strength ≥2.5 MPa (ASTM D1002) on aluminum composites, used in automotive body panels and HVAC ducting.
Container: Store in airtight glass or aluminum containers to prevent moisture absorption (which can react with isocyanates), with nitrogen blanketing recommended for large-volume storage.
Conditions: Maintain temperatures between 5–25°C and humidity ≤60% in a dark, cool area; avoid UV light (which degrades ester linkages) and oxidizing agents (e.g., chlorine).
Handling: Use within 12 months of production; agitate gently before use to ensure homogeneity. Avoid contact with strong bases, which may cause hydrolysis.
Parameter | Value |
Molecular Weight | 500–4,000 g/mol |
Hydroxyl Number | 50–120 mg KOH/g |
Tensile Strength | 34–40 MPa |
Elongation at Break | 600–700% |
Hardness (Shore A) | 85–95 |
Water Absorption | ≤0.5% (24 hours, ASTM D570) |
Viscosity (75°C) | ≤12,000 cps |
