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02. July 2018

Arlanxeo presents high molecular Keltan grades at DKT 2018

DKT 2018
Arlanxeo Hall 12 Stand 506

At DKT 2018, Arlanxeo is highlighting the further development of its very high molecular weight EPDM grade Keltan 13561C DE as well as recent findings into the use of EPDM and NR blends in order to meet rising temperature requirements.

The semi-crystalline EPDM grade Keltan 13561C DE with a very high Mooney viscosity is manufactured at the company’s EPDM plant in Changzhou, China, using Keltan ACE polymerisation technology. According to Arlanxeo, the company has extended its capabilities and is now investigating the production of this new Keltan grade at its sites in Geleen, the Netherlands, and Orange, USA, using different technologies, depending on customer needs. “This first Keltan grade with five digits is ideally suited for automotive seals and waste water seal compounds. In addition, with the new Keltan grade we extended our application areas into coolant hoses and microdense profiles,” said Niels van der Aar, Business Development Manager EPDM/NBR at Arlanxeo.

Furthermore, Arlanxeo is also introducing its recent findings of the study into the use of ethylene-propylene-diene rubber (EPDM) and natural rubber (NR) blends in order to meet rising temperature requirements. “Having identified a need in the mechanical engineering and automotive industries for rubber that can withstand high operating temperatures for long periods, we developed a compound with exceptionally high molecular weight, which gives synthetic rubber its extremely high NR type strength and resilience,” explained van der Aar. “The material, ultrahigh-molecular Keltan 9565Q, delivers a performance that is superior to natural rubber in terms of heat ageing and benefits highly dynamic applications. This Keltan grade opens up new potential for more economical EPDM processing compared with NR.”

For components subject to high stresses such as damping elements, natural rubber is considered to be almost indispensable. However, vulcanised natural rubber will form cracks and become brittle in the medium term when exposed to heat. According to Arlanxeo, the company's scientists have been able to improve synthesis to further increase the molecular weight of EPDM. When compounds based on Keltan 9565Q are modified, fatigue life can be strongly improved to attain the same level as a heat stabilised NR compound.

During DKT 2018, Arlanxeo will host two keynote presentations:

  • 2 July 2018, 16:00, Paris Room, Martin van Duin, Gosé van Zandvoort and Montse Alvarez Grima, “New Compounding Concepts based on Ultra-high Molecular Weight EPDM”
  • 3 July 2018, 9:00, Paris Room, John Beelen, Christoph Gögelein, Martin van Duin and Niels van der Aar, “Morphology and micromechanics of nanodispersed rubber mixtures”


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