Thermosets
Rigid Unsaturated Polyester — Unsaturated Polyester Resin
Unsaturated polyester resins are a broad class of thermosets cured by free-radical polymerization, typically with styrene as a reactive diluent. They are widely used in fiber-reinforced plastics (FRP) for applications ranging from boat hulls to automotive parts.
UPRSelectronDaron
Manufacturers
3
Grades
2
Applications
5
Equivalents
0
Physical Properties
- Density
- 1.10-1.30 g/cm³
- Water Absorption (24h)
- 0.2-0.8 %
- Transparency
- Clear to Opaque
- Shrinkage
- 4-8 %
Mechanical Properties
- Young's Modulus
- 2.0-3.5 GPa
- Tensile Strength
- 40-70 MPa
- Elongation at Break
- 1-3 %
- Impact Strength (Izod)
- 8-20 J/m
Thermal Properties
- Glass Transition Temperature
- 50-100 °C
- Melting Point
- N/A
- Continuous Service Temperature
- 60-120 °C
- Heat Deflection Temperature
- 50-90 °C
Electrical Properties
- Dielectric Constant
- 4.0-5.5
- Volume Resistivity
- 10^12-10^14 Ohm-cm
- Dielectric Strength
- 15-25 kV/mm
Chemical Resistance
- Acids
- Moderate resistance
- Bases
- Poor resistance
- Solvents
- Resistant to hydrocarbons and esters
- UV Resistance
- Poor without additives
Sustainability
- Recyclability
- Difficult
- Recycling Code
- N/A
- Carbon Footprint
- Moderate
Manufacturing compatibility
Lay-upSpray-upRTMPultrusionCasting
Applications
Fiber-reinforced plastics (FRP)
Boat hulls
Automotive panels
Building components
Casting resins
Available grades
Orthophthalic PolyesterIsophthalic Polyester Resin