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Solution Styrene Butadiene Rubber (SSBR)

SSBR claer and oil

The Lanxess Buna VSL portfolio offers solution styrene-butadiene rubbers that have different styrene and vinyl levels combined with varying Mooney viscosities. In contrast to emulsion SBR the molecular weight, molecular weight distribution, microstructure and branching can be controlled to produce polymers that offer improved end properties.

 Solution SBREmulsion SBR
styrene level (%)15 - 4023 - 40
vinyl level (%)7 - 5515 - 20
styrene distributionblock or randomrandom
fatty acid (max%)0,56
molecular weightcontrolled 
mol. weight distributionnarrowbroad
long chain branchingslightappreciable



Solution SBRs are gradually replacing emulsion SBRs for special applications and particularly for summer and winter tire treads and low rolling resistance tires especially in the high performance sector. It is sometimes blended with NR, BR or emulsion SBR to improve the properties of the final product.
As a component in the polymer blend of car tire treads, grip and rolling resistance will be enhanced by controlling the Tg and shape of the tan delta curve.



Provided that the compounds are formulated and processed correctly, the vulcanizates have good resistance to reversion. The low temperature flexibility, resilience and abrasion resistance depend on the polymer's styrene and vinyl content.




Namestyrene (%)vinyl (%)ML1+4oil (type)oil (phr)Tg (°C)TDSMSDS
Buna VSL 4526-22644,550TDAE37,5-30TDSMSDS
Buna VSL 5025-2 HM255062TDAE37,5-29TDSMSDS
Buna VSL 4526-2 HM2644,562TDAE37,5-30TDSMSDS
Buna VSL 5228-2285250TDAE37,5-20TDSMSDS
Buna VSL 2538-2382550TDAE37,5-31TDSMSDS
Buna VSL 2438-2 HM382480TDAE37,5-32TDSMSDS
Buna VSL 3038-2 HM383080TDAE37,5-26TDSMSDS

         

The values given are typical values and might vary from time to time..



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Marcus Moutinho
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Alex Lucassen
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E-mail: alex.lucassen@lanxess.com

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Esther Han
Phone: (65) 6725 5888
E-mail: esther.han@lanxess.com


__Data Sheets Buna VSL