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Styron Buna® cis 132 Schkopau High-cis Polybutadiene Rubber (PBR)

Category Polymer , Thermoset , Rubber or Thermoset Elastomer (TSE)
Manufacturer Styron
Trade Name Buna®
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Styron Buna® cis 132 Schkopau High-cis Polybutadiene Rubber (PBR).pdf
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Material Notes:
Composition: Buna® cis 132 – Schkopau is a stereospecific polybutadiene with a high 1,4-cis content. It is manufactured by a solution process using an organo-metallic nickel catalyst which produces a consistent light coloured polymer with low ash content. Buna® cis 132 – Schkopau contains a non-staining stabiliser.Application: Buna® cis 132 – Schkopau is widely used in the tyre industry but also in the production of conveyor belts and other rubber articles which are exposed to high cyclical stress. It offers good abrasion resistance, high resilience, low hysteresis, and a low glass transition temperature. Buna® cis 132 – Schkopau offers excellent processability and may be blended with natural rubber and styrene butadiene (SBR), isoprene (IR), nitrile (NBR), or polychloroprene (CR) synthetic rubbers. Due to its non-staining stabiliser Buna® cis 132 – Schkopau is suitable for light-coloured rubber articles also when compounded with selected thermoplastics.Test Formulation (ASTM D 3189 based on IRB7 black):Polymer - 100.0 parts by massIRB7 industry reference oil furnace carbon black - 60.0 parts by massPlasticiser - 15.0 parts by massZinc oxide - 3.0 parts by massSulphur - 1.5 parts by massStearic acid - 2.0 parts by massN-tert-butyl-2-benzothiazole sulphenamide (TBBS) - 0.9 parts by massInformation provided by Styron
Physical Properties Metric English Comments
Density 0.910 g/cc
0.0329 lb/in³
Volatiles 0.25 %

@Treatment Temp. 105 °C,
Time 3600 sec
0.25 %

@Treatment Temp. 221 °F,
Time 1.00 hour
5 g in hot air oven; ASTM D5668
Mooney Viscosity 45

@Temperature 100 °C
45

@Temperature 212 °F
[MU] ML 1+4; ASTM D1646
Ash 0.050 %
0.050 %
ASTM D5667
Mechanical Properties Metric English Comments
Tensile Strength at Break 17.6 MPa

@Treatment Temp. 145 °C,
Time 2100 sec
2550 psi

@Treatment Temp. 293 °F,
Time 0.583 hour
Cure; ASTM D412
Elongation at Break 503 %
503 %
ASTM D412
300% Modulus 0.00920 GPa
1.33 ksi
ASTM D412
Descriptive Properties Value Comments
Composition 0.95
Cis-1,4 content, FTIR
Gel rating 0.1
Rheometer 10.4 min
t<sub>c</sub> (90), ASTM D5289
17.4 dNm
MH, ASTM D5289
2.9 dNm
ML, ASTM D5289
5.2 min
t<sub>s</sub>2, test temperature 160°C; ASTM D5289
7 min
t<sub>c</sub> (50), ASTM D5289
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