Thermosets
Flexible Cast Polyurethane — Cast Polyurethane
Cast polyurethanes are thermosets formed by reacting isocyanates with polyols. They can be formulated to exhibit a wide range of properties, from very soft and flexible to hard and rigid, but are often known for their toughness, abrasion resistance, and load-bearing capacity.
PUPURDurometerVulkollan
Manufacturers
3
Grades
2
Applications
5
Equivalents
0
Physical Properties
- Density
- 1.10-1.25 g/cm³
- Water Absorption (24h)
- 0.5-1.5 %
- Transparency
- Opaque to Translucent
- Shrinkage
- 0.5-1.5 %
Mechanical Properties
- Young's Modulus
- 0.01-1.0 GPa (Shore A to D hardness)
- Tensile Strength
- 20-60 MPa
- Elongation at Break
- 300-800 %
- Impact Strength (Izod)
- 30-100 J/m
Thermal Properties
- Glass Transition Temperature
- -50 to 100 °C
- Melting Point
- N/A
- Continuous Service Temperature
- 70-120 °C
- Heat Deflection Temperature
- 20-80 °C
Electrical Properties
- Dielectric Constant
- 3.5-5.0
- Volume Resistivity
- 10^10-10^13 Ohm-cm
- Dielectric Strength
- 10-20 kV/mm
Chemical Resistance
- Acids
- Good resistance
- Bases
- Good resistance
- Solvents
- Resistant to oils and greases, swells in polar solvents
- UV Resistance
- Poor without additives
Sustainability
- Recyclability
- Difficult
- Recycling Code
- N/A
- Carbon Footprint
- Moderate
Manufacturing compatibility
CastingMolding
Applications
Wheels and rollers
Seals and gaskets
Belting
Vibration dampeners
Protective coatings
Available grades
Cast PU ElastomerPolyurethane Rubber