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SYNTHOS Kralex® 1721 Styrene Butadiene Rubber
Categories: Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)

Material Notes: KRALEX® 1721 is a standard grade of oil extended styrene butadiene rubber. It is produced by a technology of cold emulsion polymerisation based on soaps of rosin and fatty acids and contains 40% of chemically bounded styrene. It is coagulated by a system of acid and organic coagulant, contains 27% (37 PHR) of extender oil (DAE grade) and is stabilized by a staining antioxidant.

It is appropriate for rubber compounds used in the production of car tires and inner tubes, including tire re-trading, conveyor belts, footwear and various technical rubber articles.
It is not approved for production of rubber articles coming into contact with foods or drinking water.

Synthos was formerly known as Kaucuk. All information provided by Synthos.

Key Words: SBR
Vendors:
Available Properties
  • Volatiles, ASTM D5668
  • Mooney Viscosity, ASTM D3346, (15-1.5 min)
  • Mooney Viscosity, ASTM D1646, (1+4)
  • Ash, ASTM D5667
  • Acid Value, ASTM D5774
  • Styrene Content, ASTM D5775
  • Tensile Strength, Ultimate, ASTM D412, 35'/145°C
  • Elongation at Break, ASTM D412, 35'/145°C
  • 300% Modulus, ASTM D412, 35'/145°C
  
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Manufacturer Notes:
SYNTHOS Kralupy a.s.

Category Notes
Plastic

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