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POLYVERTEC® BioResins

With STRUKTOL® POLYVERTEC® BioResins, Schill+Seilacher "Struktol" GmbH is striving towards its self-imposed goal of developing bio-based, environmentally friendly products in order to increase the environmental compatibility and sustainability of its product range. To this end, the development and production of unsaturated polyester resins (UP resins) based on renewable raw materials obtained by fermentation was started. The organic content of the pure, nearly odorless polyester resin is almost 100%. The product group is supplemented by bio-based tougheners for increasing the impact strength of thermoset matrix resins.

The polyester resin POLYVERTEC® 3830 is suitable for processing in all common UP resin processing methods and shows good mechanical properties:

  • Bio content close to 100% in pure polyester resin, odorless.
  • viscosity adjustable with common reactive dilutants or thickeners
  • no restriction in the choice of radical crosslinkers
  • compatible with common fillers and fibers
  • same mechanical properties as standard polyester resins
  • suitable for processes such as pultrusion or SMC/BMC

Together with our development partner manaomea GmbH, the first applications in the field of writing instruments and the furniture industry have already been brought to market maturity.

Struktol® Polyvertec® 3830

Bio-based, high viscous polyester resin for mixing with reactive dilutant
application: hand lay-up, pultrusion and SMC processes

  • > 98% organic content
  • unsaturated polyester resin based on post-washing raw materials
  • in combination with reactive thinners, e.g. styrene or HEMA
    well suited for the formulation of SMC moulding compounds, laminating resins, gelcoats and pultrusion resins
  • Acid number: 45 g/eq.
  • Dyn. viscosity (25 °C): 115 Pas (115,000 mPas)
  • Appearance: yellowish liquid
Struktol® Polycavit® 3632

Dimer acid modified prepolymer (DGEBA)

  • Improving peel strength, flexibility
  • Epoxy-functional prepolymer of higher viscosity for the flexibilization of epoxy resin systems
  • especially suitable for use in coatings and cable sealing compounds
  • Dosage (replaces base resin): 10-40%
  • EEW: 600 g/Eq
  • Toughener content: 40 %.
  • Dyn. viscosity (50 °C): 47 Pa.s
  • Appearance: yellowish, highly viscous liquid
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Struktol® Polycavit® 3637

Dimer acid modified prepolymer (DGEBA)

  • "Improving peel strength, flexibility
  • low viscosity version of Polycavit® 3632
  • especially suitable for use in coatings and cable sealing compounds"
  • Dosage (replaces base resin): 10-40%
  • EEW: 470 g/Eq
  • Toughener content: 30 %.
  • Dyn. viscosity (50 °C) : 8 Pa.s
  • Appearance: yellowish-transparent, highly viscous liquid

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