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Tackifier & Flowcontrol FOR PREPREGS

STRUKTOL® POLYDIS® NBR Modified Epoxy Resins
STRUKTOL® POLYCAVIT® ELASTOMER Modified Epoxy Resins

Prepregs are textile fiber semi-finished products that are pre-impregnated with reactive resins.  For the production of fiber composite components, prepregs are processed into laminates and cured under pressure and temperature.

By using modifiers of the STRUKTOL® POLYDIS® NBR Modified Epoxy Resins series

  • the tack and
  • the resin flow (controlled flow)

of prepreg resins can be specifically adjusted to simplify the processing of the prepreg and to control the resin flow of the material during curing. Both of these features considerably support manufacturing companies in the production of high-quality composite parts and help to reduce production costs.
In addition, the toughness of the cured material can also be increased as important mechanical properties.

 

Struktol® Polydis® 3691

Nitrile rubber modified Bisphenol-A Epoxy Resin (DGEBF)

  • Application in adhesives to improve T-peel strength and contact adhesion
  • Tack and resin flow adjustment in prepregs
  • Dosage (replaces base resin): 10-15 %
  • Epoxy equivalent weight: 205 g/Eq
  • Dyn. viscosity (50 °C): 12 Pa.s
  • Appearance: yellowish-cloudy resin
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Struktol® Polydis® 3693

Nitrile rubber modified epoxy resin (DGEBF), lower viscosity than Polydis® 3691

  • Application in adhesives to improve T-peel strength
  • Tack and resin flow adjustment in prepregs
  • Dosage (replaces base resin): 10-15 %
  • Epoxy equivalent weight: 180 g/Eq
  • Dyn. viscosity (50 °C): 8 Pa.s
  • Appearance: yellowish-cloudy resin
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Struktol® Polydis® 3695

Nitrile rubber modified Bisphenol-A Epoxy Resin (DGEBA)

  • Application in adhesives to improve T-peel strength
  • Tack and resin flow adjustment in prepregs
  • Dosage (replaces base resin): 10-15 %
  • Epoxy equivalent weight: 195 g/Eq
  • Dyn. viscosity (80 °C): 7 Pa.s
  • Appearance: yellowish-cloudy resin
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Struktol® Polycavit® 3511

low viscous polyetheramin-modifizied epoxy resin

  • Improvement of flexibility, impact strength at low viscosity
  • well suited for the formulation of 1K and 2K adhesive systems
  • Dosage (replaces base resin): 10-35 %
  • EEW: 315 g/Eq
  • Toughener content: 40 %.
  • Dyn. viscosity(25 °C): 35 Pa.s
  • Appearance: clear, slightly yellowish liquid
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Struktol® Polycavit® 3530

Polyurethane prepolymer blended with epoxy resin

  • Improvement of peel strength, tensile shear strength, impact strength
  • suitable in particular for the formulation of 1-component structural adhesives
  • Synergistic effects with CTBN-Tougheners
  • Application temperatures -40 to +150°C
  • Dosage (replaces base resin): 8-30 %
  • EEW: 460 g/Eq
  • Toughener content: 60 %.
  • Viscosity at 40 °C: 25 Pa.s
  • Appearance: yellowish liquid
Struktol® Polycavit® 3550

Epoxy functional polyester/polyether Copolymer

  • Improvement of peel strength, impact strength, flexural strength
  • improved adhesion on galvanized steel
  • suitable for the formulation of adhesive systems and resin system for composites
  • applicable up to 200°C without loss of properties
  • Dosage (replaces base resin): 5-15 %
  • EEW: 1,800 g/Eq
  • Toughener content: 100 %.
  • Dyn. viscosity (25 °C): 400 Pa.s
  • Appearance: yellowish, viscous liquid
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Struktol® Polycavit® 3570

Polyetheramine-modified epoxy resin

  • Improvement of peel strength, tensile shear strength,
  • improved adhesion on galvanized steel
  • suitable for the formulation of adhesive systems
  • Dosage (replaces base resin): 10-25 %
  • EEW: 325 g/Eq
  • Toughener content: 40 %.
  • Dyn. viscosity (25 °C):  95 Pa.s
  • Appearance: yellowish, viscous liquid
Struktol® Polycavit® 3622

Polyol modified epoxy prepolymer based on DGEBA

  • Improvement of tensile and peel strength, flexibility, impact strength especially at low temperatures
  • almost no inherent color
  • low viscosity
  • suitable for the formulation of casting compounds and coating systems
  • Dosage (replaces base resin): 10-35 %
  • EEW: 330 g/Eq
  • Toughener content: 40 %.
  • Dyn. viscosity (25 °C): 10 Pa.s
  • Appearance: clear, slightly yellowish liquid
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Struktol® Polycavit® 3625

Polyurethane modified epoxy resin

  • Improvement of lap shear strength, impact strength
  • Properties comparable to CTBN prepolymers, but significantly lower viscosity and higher reactivity
  • Dosage (replaces base resin): 50-100 %
  • EEW: 205 g/Eq
  • Toughener content: 40 %.
  • Dyn. viscosity (25 °C): 10 Pa.s
  • Appearance: Clear, slightly 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
Struktol® Polycavit® 3662

Polyalkylenglykol modified epoxy prepolymer

  • improvement of peel strength, flexibility, impact strength, bending and tensile shear strength
  • produces high glass transition temperatures in the formulated product and good UV resistance
  • Dosage (replaces base resin): 10-40%
  • EEW: 260 g/Eq
  • Toughener content: 40 %.
  • Dyn. viscosity (25 °C) : 2 Pa.s
  • Appearance: light yellow, viscous liquid
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