PUre diversity

Polyester Resins

Polyester resins (UP resins) form the basis of our product range in the glass fibre reinforced plastic systems business area – with a wide variety of applications. They range from thixotrope standard systems for manual lamination and fibre spraying to low-viscosity standard formulations for polymer concrete and sanitary applications to numerous special formulations for specific requirements. With a broad spectrum of properties and applications, our UP resin systems are suitable for products in a wide variety of industries.

Typical properties

  • Dense matrix / composite of approximately 1.1 g/cm³ / 1.5–1.7 g/cm³
  • Fibre content 25-50 % of total weight
  • Moulded part mass per unit area of 4500-8000 g/m²
  • Flexural modulus of elasticity 5000–25,000 MPa (with reinforcing mesh)
  • Bending resistance of 130–260 MPa (with reinforcing mesh)
  • Impact resistance of 45–95 KJ/m²
  • Reinforcing materials:
    • Continuous or cut glass fibre mats, fleece
    • Mesh
    • Non-crimp fabrics


Special formulations and versions

  • Styrene-reduced, environmentally friendly formulations
  • Low-viscosity injection resins with reduced exothermic peak
  • Formulations for the pultrusion process
  • Systems with high chemical and hydrolysis resistance
  • DIN 1140 versions with special mechanical values and dimensional stability under heat greater than 100 °C (HDT > 100 °C)
  • Resins with good adhesion for combination with PVC
  • Resin systems with shipping industry approval: Det Norske Veritas/Lloyd’s Register of Shipping/Germanic Lloyd
  • Coordination with gel coat/top coat for surface refinement


Flame protection formulations

  • Electrical industry: UL 94 V0
  • Rail vehicle construction: DIN 5510 (S4, SR2, ST2)