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Vulcanisation Activators

Vulcanisation activators are products which have a strong activation effect on the cross linking reactions of diene rubbers. The vulcanisation speed is enhanced, and the cross-link density and reversion resistance are increased, particularly when used in high doses. In most cases the dynamic properties of the vulcanised products are clearly improved. Furthermore, additives like Struktol Aktivator 73 A or Struktol ZEH can either supplement or completely replace the use of stearic acid, without running the risk of increased bloom.

VULCANISATION ACTIVATORS
Struktol® Aktivator 73 A
  • Blend of zinc salts
  • Light grey pastilles

Packaging: 20 kg bags
Density: 1200 kg/m³
Melting point: 112 °C
Zinc Content: 16.3 %
Dosage: 2 - 4 phr, in combination with 3 - 5 phr ZnO

  • Strong activation with clear increase of modulus values
  • Improves reversion resistance
  • Lower heat build-up during dynamic loading
  • Reduces compression set at higher temperature
  • Can supplant the use of stearic acid and reduce dependence on ZnO
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Struktol® Aktivator 74
  • Blend of zinc salts
  • Beige to brown pastilles

Packaging: 20 kg bags
Density: 1100 kg/m³
Melting point: 100 °C
Dosage: 3 - 5 phr

  • Cure activation additive for increased reversion stability
  • Can partly replace common fatty acid based activators
  • Processibilty, especially compound flow is enhanced
  • Dispersing and activating effect within NR silica filled compounds
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Struktol® ZEH
  • Zinc-2-ethylhexanoate
  • Light yellow liquid

Packaging: 200 kg drums
Density: 1180 kg/m³
Viscosity at 25 °C: <7000 mPa*s
Dosage: 3 - 5 phr

  • Reduces stress relaxation and creep
  • Particularly effective as component in soluble EV systems
  • Improves dynamic properties
  • Reduces compression set at low temperatures
  • Improves building tack
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Struktol® ZEH-DL
  • Zinc-2-ethylhexanoate
  • Light yellow powder (67 % active substance)

Packaging: 20 kg Säcke
Density: 1400 kg/m³
Dosage: 3 – 6 phr

  • Reduces stress relaxation and creep
  • Particularly effective as component in soluble EV systems
  • Improves dynamic properties
  • Reduces compression set at low temperatures
  • Improves building tack
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Struktol® ZEH 75
  • Zinc-2-ethylhexanoate
  • Light yellow powder (75 % active substance)

Packaging: 20 kg Säcke
Density: 1300 kg/m³
Dosage: 3 – 6 phr

  • Reduces stress relaxation and creep
  • Particularly effective as component in soluble EV systems
  • Improves dynamic properties
  • Reduces compression set at low temperatures
  • Improves building tack
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