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VECTOR® 2518A

Styrene Butadiene Styrene Block Copolymer

Supplied by Dexco Polymers LP

The technical datasheet with complete property values for VECTOR® 2518A is available to members of the Prospector Plastics Database.
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Product Description
VECTOR 2518A
Styrene-Butadiene-Styrene (SBS) Block Copolymer
  • SBS(1) triblock copolymer.
  • Contains <1% diblock copolymer.
  • Medium styrene, high modulus copolymer.
  • Outstanding thermal stability.
  • Supplied as a porous pellet, dusted with talc.
  • VECTOR styrenic block copolymers find use under certain regulations as articles or as ingredients in articles intended for food contact or medical applications. Please contact your Dexco Polymers agent for a detailed letter of certification or further information.

VECTOR 2518A styrene-butadiene-styrene block copolymer is produced via proprietary sequential anionic polymerization technology from Dexco Polymers LP, a Dow/ExxonMobil Venture. VECTOR 2518A is not formulated with the antioxidant TNPP (tris(nonylphenyl) phosphite).

It is more creep resistant than VECTOR 8508A SBS. It has excellent thermoplastic elastomer properties and outstanding physical strength. It is designed for use as an impact/toughness modifier in blends with styrenics and in elastomeric film compounds.
General  
Material Status 
  • Commercial: Active
Availability 
  • North America
Features 
  • Copolymer
  • Food Contact Acceptable
  • Good Creep Resistance
  • Good Strength
  • Good Thermal Stability
  • Porous
Uses 
  • Plastics Modification
Forms 
  • Pellets
Physical
Nominal Value
Unit
Test Method
Specific Gravity
 
 ASTM D792
Melt Mass-Flow Rate (MFR) (200°C/5.0 kg)
g/10 min
 ASTM D1238
Solution Viscosity
mPa·s
 ASTM D2196
Ash Content
wt%
 ASTM D1416
Styrene Content
wt%
 Internal Method
Elastomers
Nominal Value
Unit
Test Method
Tensile Stress 2 (300% Strain, 77°F)
psi
 ASTM D412
Tensile Strength 2 (Yield, 77°F)
psi
 ASTM D412
Tensile Elongation 2 (Break, 77°F)
%
 ASTM D412
Stress Relaxation 3
      
Peak Force @ 200% strain (A): 73°F, 35.0 mil
psi
  
Peak Force @ 500% strain: 73°F, 35.0 mil
psi
  
Ratio (A:B): 73°F, 35.0 mil
 
  
Relaxation @ 200% strain: 73°F, 35.0 mil
%
  
Set after 500% strain: 73°F, 35.0 mil
%
  
Unload @ 50% strain (B): 73°F, 35.0 mil
psi
  
Hardness
Nominal Value
Unit
Test Method
Durometer Hardness (Shore A, 1 sec)
 
 ASTM D2240
Additional Information
Nominal Value
Unit
Test Method
Diblock Content
wt%
 Internal Method
Volatiles
wt%
 Internal Method
Related Terminology
Product names can be difficult to match. You may have searched any one of these terms to find this product: VECTOR® 2518A, VECTOR 2518A, VECTOR® , VECTOR, VECTOR2518A, 2518 A, 2518A, Styrene Butadiene Styrene Block Copolymer, SBS, Thermoplastic Elastomer, TPE, Dexco, StyreneButadieneStyreneBlockCopolymer, ThermoplasticElastomer, A2518
Features
Features may also be described by the following terms: Good Thermal Stability, Good Strength, Good Creep Resistance, Creep Resistant.
Uses
Uses may also be described by the following terms: Plastics Modification, Plastic Modification.
Notes
1Typical properties: these are not to be construed as specifications.
225 Wt.% in toluene
3Described in US 7,445,831 patent. Tested on roll milled/compression molded plaques (0.035" thick). Tested in the transverse direction at room temperature.
 
IDES
Copyright © 2012 IDES
The information presented on this datasheet was acquired by IDES from the producer of the material. IDES makes substantial efforts to assure the accuracy of this data. However, IDES assumes no responsibility for the data values and strongly encourages that upon final material selection, data points are validated with the material supplier.