Hydrogenated Styrenic Thermoplastic Elastomer (SEBS) Tuftec™ N504

Asahi Kasei Tuftec™ N504 is a high-molecular-weight grade, which is used as an impact modifier of polyphenylene ether (PPE). TPE compounds are available based on N504 if blending PP, oil and other ingredients.


Physical Form

  • Supplied as dusted crumb

Features and Benefits

  • Excellent impact modifier for PPE
  • Raw material for TPE compound
  • High molecular weight (HMW)


  • FDA 21 CFR 177.1810
  • Regulation (EU) No 10/2011


Property Test Method Unit Value
Specific Gravity ISO 1183 g/cm3 0.91
MFR 230°C, 2.16kg Load ISO 1133 g/10 min No Flow
Styrene / Ethylene-Butylene Ratio Asahi Kasei Method 32/68

Please note that all data and values are given as typical results obtained with the indicated test methods for purposes of basic reference in grade selection only, and not as any product specification or warranty of any nature, and are subject to change without notice.

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We, Asahi Kasei Group, request that customers who are considering using our products in medical, pharmaceutical, cosmetic and other related applications (hereinafter collectively called “Medical Applications”) shall contact us and confirm our policy on Medical Applications in advance. Information herein regarding conformity to certain laws and regulations are as of January, 2015. Please consult with us for the latest status. We make no guarantees or warranties, express or implied, concerning the suitability of our products for use in Medical Applications. It is not our responsibility to determine if our products are safe, lawful, and technically suitable for intended applications.