Today's commercial high-impact polystyrene resins are made by polymerization of styrene in the presence of an unsaturated rubber, generally polybutadiene, in a solution or mass-suspension process. Such polybutadiene is Buna CB.

The use of organo-metallic catalysts in the production of Buna CB leads to highly uniform polymers which are particularly suited for this application.

The rubber-in-styrene graft polymerization of Buna CB results in superior products compared with those produced by mechanical blending.

Name    Plant    SV (5,43% in toluene)    ML 1+4    TDS    MSDS
Buna CB 55 GP    Cabo    168    53    TDS
MSDSBuna CB 55 GPT    Cabo    165    52,5    TDS
MSDSBuna CB 70 GPT    Cabo    250    69.5    TDS
MSDSBuna CB 528 T    Pt. Jérôme    159    53    TDS
MSDSBuna CB 528 SI    Pt. Jérôme    159    53    TDS
MSDSBuna CB 529 T    Pt. Jérôme    170    55    TDS
MSDSBuna CB 530 T    Pt. Jérôme    250    68    TDS
MSDSBuna CB 550 SI    Pt. Jérôme    163    54    TDS
MSDSBuna CB 550 T    Pt. Jérôme    163    54    TDS
MSDSBuna CB 565 T    Pt. Jérôme    44    60    TDS
MSDSBuna CB 380    Orange    90    38    TDS
MSDSBuna CB 550    Orange    163    54    TDS
MSDSBuna CB 550 T    Orange    168    53    TDS
MSDSBuna CB 710    Orange    265    71    TDS
MSDS

In addition to the common Lithium polybutadiene rubbers, LANXESS offers a range of high-cis Neodymium polybutadiene rubbers for plastic modification which offer improved properties of the final products.

Name  cis (%)    SV (5,43% in toluene)    ML 1+4    TDS    MSDS
Buna CB 728 T    min 96    160    44    TDS
MSDSBuna CB KA 8967    min 96    300    63    TDS
MSDS

Key Properties

• completely soluble in styrene
• high purity and light color
• extremely low gel content
• compliance with FDA regulations
• solution viscosity with tight tolerance limits