Caoutchouc sbr 1723

Composition
BUNATM SB 1723-Schkopau is manufactured by cold polymerization using mixed rosin acid/fatty acid soaps. In relation to solid rubber it is plasticized with 37.5 parts of TDAE oil which does comply with EU DIRECTIVE 2005/69/EC for use in tires within the EU. A discoloring stabilizer is added during the production process.

Application
BUNATM SB 1723-Schkopau is a general purpose rubber. It can be processed in all sectors of the tire and rubber industry. The main application is tire production.

Packaging
BUNATM SB 1723-Schkopau is supplied in bales of 25 kg nominal weight.
Bales are wrapped in 50 micron polyethylene film (Vicat softening temperature: 92 °C).
One box contains forty eight bales (nominal 1200 kg)

Specification sheet
Raw material specification sheets are available from Trinseo or your local supplier on request.

Handling precautions
BUNATM SB 1723-Schkopau has to be kept away from sources of ignition.
Reference must be made to the Safety Data Sheet for this product.
The precautions advised in the Safety Data Sheet should be strictly observed.

Storage
BUNATM SB 1723-Schkopau should be stored in an adequately ventilated area where it will not be subjected to direct sunlight or temperatures in excess of 30 °C. Under these conditions BUNATM SB 1723-Schkopau has a shelf life of at least 12 months

Chemical and Physical Data

Property Test Method Unit Value
Mooney viscosity(1) ASTM D 1646 MU 49.2
Bound styrene ASTM D 5775 % 23.5
Total extractables ASTM D 5774 % 31.9
Organic acid ASTM D 5774 % 4.5
Volatile matter (2) ASTM D 5668 % 0.3
Ash ASTM D 5667 % 0.04
Specific gravity SM(3) g/cm3 0.93


Test Formulation (ASTM D 3185-1A based on IRB8 black)

Parts by Mass

Polymer 100.0
Carbon black IRB8 50.0
Zinc oxide 3.0
Sulphur 1.75
Stearic acid 1.0
Accelerator (TBBS) 1.0

Rheometera) b)

Property Test Method Unit Value
ts2 ASTM D 5289(4) min 5.0
tc(50) ASTM D 5289 min 7.8
tc(90) ASTM D 5289 min 13.9
ML ASTM D 5289 dNm 2.4
MH ASTM D 5289 dNm 16.0


Vulcanisate Dataa) b)

Property Test Method Unit Value
Tensile strength ASTM D 412(5) MPa 21.5
Elongation at break ASTM D 412 % 420.0
Modulus 300% AS