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Home > Products > Tufprene™ & Asaprene™ – The styrenic thermoplastic elastomers > Tables of Tufprene™ and Asaprene™ Grades and Properties >Asaprene™ T-438
December 12, 2001
Product Information	Asaprene
Asaprene™ T-438
SBS: Styrenic thermoplastic elastomer
Essentials

Specifically developed for superior characteristics and performance in pressure-sensitive and other adhesives, marked by good processability through low viscosity and a high level of balanced characteristics. It is supplied in pellet form.

Contact us for information on handling and use.


Applications
Adhesives and sealants modifier, meeting requirements for low viscosity. Hot-melt pressure-sensitive adhesives modifier, with superior flexibility and tack characteristics, for sanitary products.
Adhesives for building and construction, Hot-melt pressure-sensitive adhesives

Basic characteristics of Asaprene™T- 438
Property Test method Value
Specific gravity ASTM D 297 0.95
MFR, E (g/10 min)
190°C, 2.16 kg load
ASTM D 1238 -
MFR, G (g/10 min)
200°C, 5 kg load
25
Hardness, Type A JIS K 6253 76
Tensile strength (MPa) JIS K 6251 5
Elongation (%) 1,130
300% tensile stress (MPa) -
Viscosity as 15% solution in toluene (mPa s) Asahi Kasei method 50
Styrene/butadiene (wt%) Asahi Kasei method 35/65
Product form Pellet

Test conditions
  • Test piece: Compression-molded sheet, 2-mm thick, #3 JIS dumbbell shape.
  • Roll kneading temp.: 120°C~130°C.
  • Compression molding: Preheating, 160°C 5 min; compression, 80 kg/cm2 160°C 5 min; cooling, 3 min.
  • Test measurements temp.: 23°C.

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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