Hydrogenated Styrenic Thermoplastic Eastomer (SEBS) Tuftec™ H1043

Asahi Kasei Tuftec™ H1043 is a high styrene content SEBS. It can be easily blended with PS and PPE. It is used as a compatibilizer of styrenic resin / olefinic resin blends. It is also suited as an impact modifier of cyclo olefin polymer (COP) and cyclo olefin copolymer (COC).


Physical Form

  • Supplied as a dusted, dence pellet

Features and Benefits

  • Good compatibility to COP and COC
  • Good compatibility to PPE


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


Property Test Method Unit Value
Specific Gravity ISO 1183 g/cm3 0.97
MFR 230°C, 2.16kg Load ISO 1133 g/10 min 2.0
Durometer Type D
ISO 7619 °Shore D 72
Tensile Strength
Dumbbell: Type 1A 10 mm/min
ISO 37 MPa 10.3
Dumbbell: Type 1A 10 mm/min
ISO 37 % 20
Styrene / Ethylene-Butylene Ratio Asahi Kasei Metdod 67/33

Typical characteristics of HIPS/PP/H1043 blend (injection molded parts)

Property Test method HIPS/PP
Specific gravity ASTM D 297 0.99 0.99 0.99
MFR (g/10 min)
200°C, 5 kg load
ASTM D 1238 25 13 13
Tensile strength (MPa)
5 mm/min
ASTM D 638 26.5 23.5 28.4
Elongation (%)
5 mm/min
ASTM D 638 3 16 170
Flexural strength (MPa)
3 mm/min
ASTM D 790 46 40 46
Flexural modulus (MPa)
3 mm/min
ASTM D 790 1860 1570 1770
Izod impact strength (kgcm/cm) ASTM D 256 4.4 11.2 7.2
Heat distortion temp. (°C)
4.6 kg load
ASTM D 648 91 89 89
Vicat softening point (°C) ASTM D 1525 110 108 108

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.