DSM Engineering Plastics


Hydrolysis-resistant Arnite PBT

Hydrolysis-resistant Arnite® PBT provides new cost-effective alternative to high performance polymers


A cost-effective solution in applications exposed to humidity and high temperatures

With continuous-use and peak temperatures around the engine continuing to rise, materials like polyamides 6 and 66 and standard PBT are no longer good enough for the job in some applications. Many Tiers see hydrolysis-resistant PBT as a bridge between these materials and more expensive specialty solutions. PBT scores over standard polyamides for automotive electronic applications because it does not require the use of heat stabilizers (some of which are the source of corrosion problems on metal contacts) and because its lower moisture absorption leads to higher dimensional stability.

The Arnite HR grades stand out from the pack of PBTs in many ways, but most notably in their higher retention of mechanical properties after USCAR Class 3, 4, and 5 temperature/humidity profile exposure and ‘85/85’ cycles (85°C/85% relative humidity) of up to 3000 hours. DSM took into consideration not only the needs of the automobile industry today, but also how they are likely to change in the future. The new grades have been engineered in anticipation of more robust testing and validation standards as the trend towards electric-powered and autonomous road vehicles picks up.

Further Reading

  • Hydrolysis-resistant Arnite PBT


    Arnite TV4 261 HR-HS: 30% Glass Reinforced, Hydrolysis resistant, High Speed


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  • Press release

    DSM’s new hydrolysis-resistant Arnite® PBT provides new cost-effective alternative to high performance polymers 

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  • DSM Engineering Plastics' webshop

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