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Polybutadiene Rubber UBEPOL BR®
Rubber applications

Synthetic Rubber

1. Raw Polymer Properties

Grade BR
150
BR
150B
BR
130B
BR
150L
BR
360L
BR
230
BR
133P
Mooney viscosity ML1+4 ,100°C 43 40 29 43 51 38 35
T-cp *1 (cps.) 75 48 30 105 127 117 -
Microstructure Cis (wt%) 98 97 96 98 98 98 98*2
Trans (wt%) 1 2 2 1 1 1 1*2
Vinyl (wt%) 1 1 2 1 1 1 1*2
Oil content Paraffinic (phr) - - - - - - 37.5
Specific gravity (g/cm3) 0.91 0.91 0.91 0.91 0.91 0.91 0.89
Anti-Oxidant non-staining
Package 35kg bale
*1
5wt% solution viscosity in toluene at 25°C
*2
Microstructure of matrix polymer

2. Compound Properties

Recipe : ASTM D3189(BR133P:ASTM D3483)
Grade BR
150
BR
150B
BR
130B
BR
150L
BR
360L
BR
230
BR
133P
Compound mooney viscosity ML1+4 ,100°C 62 59 42 71 83 55 77
Curing Characteristic ML (dN•m) 2.0 1.9 1.5 2.1 2.5 1.8 3.0
MH (dN•m) 10.1 9.0 8.1 10.9 11.4 8.5 11.9
Ts1 min. 3.0 3.4 3.7 2.8 2.7 3.4 2.5
Tc(50) min. 8.5 8.6 8.8 8.3 8.2 8.6 6.7
Tc(90) min. 11.7 12.1 12.5 11.4 11.2 12.3 9.5

3. Vulcanizate Properties

Curing time ; 50 minutes
Grade BR
150
BR
150B
BR
130B
BR
150L
BR
360L
BR
230
BR
133P
Hardness Type A 64 62 60 65 66 62 68
100% modulus   MPa 2.4 2.4 2.1 2.5 2.5 2.3 3.7
200% modulus   MPa 6.5 6.0 5.3 6.9 7.0 6.2 9.8
300% modulus   MPa 12.5 11.4 9.8 13.1 13.3 11.5 -
Tensile strength   MPa 16.0 15.7 12.9 17.1 17.4 15.2 13.8
Elongation   % 380 370 370 390 380 390 260
Tear resistance   kN/m 56 51 48 61 64 51 54
Rebound BS % 57 54 50 60 62 53 60
Compression set   % 22 25 28 20 18 29 24
Heat build up ΔT °C 27 36 44 22 20 33 19
P.S % 8 14 26 5 4 13 5
Pico abrasion
resistance
  INDEX 209 183 158 235 257 181 175
Lambourn abrasion
resistance
slip rate
20%
INDEX 100 90 84 109 113 91 80
slip rate
60%
INDEX 100 87 81 113 115 90 79
Cut growth resistance
(Cut length ; from 2mm to 15mm)
cycles 4700 5100 5300 4100 3600 6200 2900
Cut generation *104cycles 27 18 14 >30 >30 21 1.5