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Polybutadiene Rubber UBEPOL BR®
Resin improvement applications (HIPS)

Synthetic Rubber

1. Raw Polymer Properties

Grade BR15HB BR15H BR15HL BR13HB BR14H BR23H
Mooney viscosity ML1+4 ,100°C 40 43 43 30 33 38
Volatile matter (wt%) 0.5 0.5 0.5 0.5 0.5 0.5
Ash content (wt%) 0.05 0.05 0.05 0.05 0.05 0.05
Microstructure Cis (wt%) 97 98 98 96 97 98
Trans (wt%) 2 1 1 2 2 1
Vinyl (wt%) 1 1 1 2 1 1
5wt%
Solution in styrene
Solution viscosity (cps) 60 92 135 41 58 155
Styrene insoluble (wt%) 0.003 0.003 0.003 0.003 0.003 0.003
APHA 10 10 10 10 10 10

2. Properties of HIPS

Rubber content=7wt.%
Grade BR15HB BR15H BR15HL BR13HB BR14H BR23H
Swelling index 10.9 10.7 10.6 11.2 10.8 11.5
MEK/acetone insoluble (wt%) 23.0 23.3 23.5 22.1 23.1 23.0
Rubber particle size (μm) 2.1 2.5 2.7 1.6 1.9 2.4
Tensile strength at yield (MPa) 30 29 29 31 30 28
at break (MPa) 29 29 30 30 29 28
Elongation (%) 22 23 25 20 22 30
Izot impact strength (J/m) 76 75 75 72 78 83
Gloss     59 56 51 68 66 56
Vicat softening point (°C) 101 101 101 101 101 101
Melt flow index (g/10min.) 3.6 3.5 3.6 3.6 3.6 3.5